A111D2 4L1537

NATL INST OF STANDARDS & TECH R.I.C. mu III

iMl 102461537

Fuller. Everett Glad/Photonuclear data : QC100 U56 NO.83-2742 VI 983 C.1 NBS-PUB- NBSIR 83-2742

Photonuclear Data - Abstract Sheets

1955 - 1982

Volume XIII (Hafnium - Thallium)

1 Reference

NBS

PUBLICATIONS

U S. DEPARTMENT OF COMMERCE

National Bureau of Standards

National Measurement Laboratory

Center for Radiation Research

Washington, DC 20234

QC

U S. DEPARTMENT OF COMMERCE

'*• BUREAU OF STANDARDS

100

llJ56

83-2742

1955-1982

VOL • X I I 1 1

NBS RESEARCH INFORMATION CENTER ($C

ICO

NBSIR 83-2742

PHOTONUCLEAR DATA - ABSTRACT SHEETS

1955 - 1982

VOLUME XIII (HAFNIUM - THALLIUM)

E. G. Fuller, Henry Gerstenberg

U.S. DEPARTMENT OF COMMERCE

National Bureau of Standards

National Measurement Laboratory

Center for Radiation Research

Washington, DC 20234

U.S. DEPARTMENT OF COMMERCE, Malcolm Baldrige, Secretary

NATIONAL BUREAU OF STANDARDS, Ernest Ambler, Director

TABLE OF CONTENTS

Table of Contents.

Introduction . . .

Hafnium (Natural )

.

Hafnium (A=176) . .

Hafnium ( A= 177 ) . .

Hafnium ( A=178) . .

Hafnium (A=179). .

Hafnium (A=180) . .

Tantalum ( A= 18 1 )

.

Tungsten (Natural)

Tungsten (A=182) .

Tungsten (A=183) .

Tungsten (A=184) .

Tungsten (A=186) .

Rhenium (Natural).

Rhenium ( A= 185) . .

Rhenium (A=187). .

Osmium (Natural) .

Osmium ( A= 186) . .

Osmium ( A= 1 88) . .

Osmium (A=189) . .

Osmium (A=190) . .

Osmium ( A= 192) . .

Iridi urn (Natural )

.

Iridium ( A= 191) . .

Iridium (A=193). .

i

1

3

11

15

21

31

39

45

175

201

211

215

229

245

255

259

267

273

279

285

291

297

303

309

315

1
Platinum (Natural) . 321

Platinum (A=194) 341

Platinum (A=195) 347

Platinum (A-196) . 353

Gold (A=197) 359

Mercury (Natural) 471

Mercury ( A= 1 98) 497

Mercury (A=199). . 503

Mercury (A=201) 511

Mercury (A=202). . 517

Mercury (A=204) 523

Thallium (Natural) ..... . 527

Thallium (A=20'3) 543

Thallium (A=205) 557
Photonuclear Data-Abstract Sheets

1955-1982

I. Introduction

As used in connection with this collection of data-abstract sheets, the term

photonuclear data is taken to mean any data leading to information on the electromagnetic matrix element between the ground state and exci ted states of a given nuclide.

The most cotnnon types of reactions included in this compilation are: ( e ,

e

1 ) , (y,y),

( y,y

1 ) , (y,n), (y,p), etc. as well as ground-state particle capture reactions, e.g.

(ct,y 0). Two reactions which fit the matrix element criterion are not included in

the compilation because of their rather special nature. These are heavy particle

Coulomb excitation and the thermal neutron capture reaction (n,y 0

) . While the energy

region of particular interest extends from 0 to 150 MeV, papers are indexed which

report measurements in the region from 150 MeV to 4 GeV. Most of the experiments

listed are concerned with the excitation energy range from 8 to 30 MeV, the region

of the photonuclear giant resonance.

The hierarchical grouping of the photonuclear data-abstract sheets within the file

is by: 1. Target Element, 2. Target Isotope, and 3. by the Bibliographic

Reference Code assigned to the paper from which the data on the sheet were abstracted.

In this file, colored pages are used to mark the beginning and end of the sheets for

each chemical element. A brief historical sketch of the elementis given on the divider

sheet marking the start of each section; the information for this sketch was derived

from references such as the Encycl opaedi a Bri tannica. In those cases where the sheets

for a given element make up a major part of a volume, colored pages are also used to

delineate sections pertaini ng to the individual isotopes of the element. Each of the

sections of the file, as delineated by two colored divider sheets, represents a 27 year

history of the study of electromagnetic interactions in either a specific nuclide or a specifc element.

The data-abstract sheets are filed under the element and/or isotope in which the

ground-state electromagnetic transition takes place. For example, the abstract sheet

for a total neutron yield measurement for a naturally occurring copper sample would

appear i n the elemental section of the copper file. On the other hand, a measurement

of the 9.73 minute positron activity produced in the same sample by photons

with energies below the three-neutron separation energy for 65cu (28.68 MeV) would

be filed with the sheets for 63c u> Similarly a measurement of the ground-state

neutron capture cross section in wou id be filed under while the corresponding

ground-state alpha-particle capture cross section would be filed under

At the end of this volume there is a master list of the abbreviations that have

been used in the index section of the abstract sheets. The listings are those used

in the final published index, Photonuclear Data Index, 1973-1981 , NBSIR 82-2543,

i ssued in August 1982 by the U. S. Department of Commerce, National Bureau of Standards,

Washington, DC 20234. In some cases two notations are entered for the same quantity.

The second entry is the abbreviation that was used in one or more of the earlier

published editions of the index.

1
0

.? , r :: > 3

fc;

ST . .
Hf

HAFNIUM

1=12

Hafnium was discovered by 0. Coster and G. C. de Hevesy in

1925. It was named after the Latin word for Copenhagen

where the discovery was made. The missing element has

always been considered to be a member of the rare-earth

group and many early investigators had looked in this group

but with no success. Niels 8ohr concluded, based on his

view of the electronic arrangement in atoms, that the

missing element 72 was not a member of the rare-earth group

but a member of the zirconium family and should have the

properties resembling zirconium. With this information.

Coster and.de Hevesy searched for and found, in zirconium,

clear evidence of the new element.

3 Hf
'
T. Kaminishi, C. Ko

j ima

Jap. J. Appl. Phys. 2, 399 (1963)

Hf 72

METHOD

Linac; isomer yield; activity

REF. NO. 63 Ka 2 NVB

REACTION RESULT EXCITATION

EH E ROY SOURCE OETECTOR

ANCLE

TVP« RANGE

g,g/ RLY 1 c 5 ACT1

4PI

(0.16, ) .22)

Table II. The isomers observed

Isomer Observed value Referenced value111111

Half-life Energy (MeV) Half-life Energy (MeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.161 Br-79m 4.80 sec 0.209 4.8 sec 0.208 Sr-87m 2.3 hr 0.390 2.8 hr 0.388 Y-S9m 15.0 sec 0.920 14 sec 0.915 Rh-103m 58 min * 57 min 0.040 Ag-107m 1 \ 44 sec 0.094 Ag-109m 1 42 sec

f 0.95

40 sec 0.088

. Cd-lllm 47 min 0. 150,0. 2S5 49 min 0.150,0.247 ln-115m 4.5 hr 0.335 4.5 hr 0.335 Sn-117m 17 day 0.160 14 day 0.159,0.161 Ba-137m 2.6 min 0.660 2.6 min 0.662 Er-167m 2.10 sec . 0.209 2.5 sec 0.208 Hf-179m 18.5 sec 0.157.0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 5.5 sec 0.1025,0.2915 other

Ir-191m 4.90 sac 0.129, <0.07 4.9 sec 0.042-0.129 Pt-195m 4.5 day 0.065** 4.1 day 0.031-0.130 Au-197m 7.0 sec 0.10.0.27,0.40 7.2 sec 0.130,0.270,0.407

Hg-199m 43 min 0.160,0.370 42 min 0.158.0.368

• This isomer was measured with a G-M flow counts-.

'* This value corresponds to Pt-K X-ray ~„.‘gy. Table III. Induced activation rate

Element Beamenergy fMeV)

Counting rate , (x 10000 cpm -Sample

Se 5 1300 ..etaliic pellet Br 1 * 1600 -'t-jr grain Sr 6 S.'COi powder Y 5 metallic grain

Rh 5 o.2l* RhCIj grain

A« 5 ISO metallic plate Cd 6 0.5 CdClj grain

fa 6 8 metallic plate Sn 6 0.0005 metallic plate Sa 5 0.6 BaS powder

Er 4 4900 Er-Oj powder

Hf 5 1600 metallic plate W 5 120 metallic powder

fr 3 2100 metallic powder

Pt 5 0.3 metallic plate Au 4 4300 metallic plate Hg 6 0.09 metallic liquid

* The val“e measured with a G-M flow counter. •roMM-oc rnOTONUCLEAR DATA SHEET 5

U.S. DEPARTMENT OF COMMERCE

NATIONAL lUKttUOF ITANOAROS
REF. Z Ac Veres

Acta Phys. Acad. Sci.Hung. _16, 2- l -73 ( |<f *,3) Hf 72

METNOO

Radioactive source

REF. NO.

63 Ve 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OET ECTOR

ANGLE TYPE RANGE TYPE RANGE

g.g/ ABX 0-1 D 0-

1

NA1-D

ISOMERS

Ta6jiHua II H3Mepet<Hbie 3 Ha 4eHHH nocJie oojiyMeHHH, cpaBHHBaeMbie c apyrHMH JiirrepaTypHUMii AaHHUMM

SjieMCHT

Akthbhoctw

otfsiyMCHH*

nocJie

Akthbh.

OKCTpn. 6 xoHue

JlyTepmTypMue OAMHUe

flaimuc H3MCPCMMH

<rm rrm <10—»> nepsoro

K3MCpeH M ft (nmh/mmh.)

oaayM. (mmn/ MMH.)

T.l, E

(IQ.) T,l. E(N»)

(IO--CJO

Se=77m 3842±96 5400 17,5 cex. 160 18,1 ±1 cex. 160±10 9,5 1,75 Sr-87m 191 ±5 200 2,8 *i. 390 2,9 ±0,1 «l 365 ±25 0,85 0,2 y-89m 96 ±20 170 16 ce«. 910 16,7 ±5 cex. 0,08 0,02

Rh-I03m 28±5 31 57 mhh. 40 58±2mhh. 2Q,5±0,5 0,08 0,01 Ag-107m 220± 14 250 44 cex. 93 43,8±0,6 cex 91 ±10 0,8 0,2 Ag°l09m 39 cek. 88 HM79ra 80±18 155 19 cen. 160; 215

19 ±2 cex. 1 0,2

Ir-191m 90 ±20 250 4,9 cex. 42; 130 5±2cex. 5,6 1

Pt-195m 90±9 100 3*5 A* 31;

100;

130;

3*5 ±0,2 a* 32±367,5±5

96 ±5

130±10

0,2 0,04

Au-197m 240±16 520 7,2 cex. 130; 277; 407

7,2±1 cex. 68:130: 280±20

390 ±20

0,07 0,01

Hg-199m 9.6 ±3,2 42 MMH. 160; 370 I

0,005 0,001

A— PUy. Hmmf. Tmm. XVI. Pam. 3.

vJ

form NBS-418

A (RCVo 7*14-64) USCOMM-OC 2601 0*P64

U.3. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 6
ReF - . Mitrofanova, Yu. N. Ranyuk, and P. V. Sorokin

J. Nucl. Phys. (USSR) to, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

EL EM. SYM.

Hf 72

MCTMOO REF. NO.

67 Mi 1 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE type range

G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 = loQO MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

lUClcUS Fissionability D

Cross

section <r«. Nucleus

Fissionability D

Cross

section u,

,

Di 0.11±0.01 7.8±0.6 08 0.0058 ±0.0005 0.37 ±0.04

Pb 0.050 ±0.004 3.4±0.3 Re 0.0056 ±0.0006 0,35±0,04

T1 0 . 0.11 ± 0.003 2,1 ±0.2 Ta 0.0045 ±0,0005 0.27 ±0.03

Au 0.019±0.002 1,25±0.10 Hf 0.0042 ±0.0004 0.25±0.03

.'t <».ul2±0.002 0.80±0.08

Fig. 1. Photofimon fragment yield*. G-present work; O-Jungerman and Steiner." 1 The curve* were plotted through the experimental point*.

Fig. 2. PhocoAssion fragment yields as a function of Z’/d. The

ordinates are values of <7q in units of cm'.

form NBS-41S

(REV. 7.14-641 USC 3 MM- O C 2S010-P64 PHOTONUCLEAR DATA SHEET 7

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Yu. N. Ranyuk and P. V. Sorokin

J. Nucl. Phys. (USSR) 37 (1967)

Sov, J. Nucl. Phys. jj, 26 (1967)

ELEM. SYM. A

Hf 72

METHOD REF. NO. 67 Ra 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE ABX thr-260 C 200-260 EMUI

4PI

TABLE III

MeV

Cross section per equivalent y quantum, 10~M cm1

Oa Re Ta Hf

200

220

240 280

17+2

22+2

33+3

45±*

11.8+0.8

17+1

29+1

38+2

5. 2+0.

3

8. 6+0.

5

13.0+0.6

17.2+0.7

3. 2+0.

7

4. 8+0.

3

8. 2+0.

4

11.2+0.5

ff/f-fOiem? (Jj

Fig. 4. Photofission crow lections of Os, Re, Ta, end Hf aa functions of photon energy.

form NBS>4)8

(REV. 7-I4-94I USC OMM.DC 280I0-PS4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 3
REF. V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. SYM.

Hf 72

METHOD REF. NO. 76 Em 2 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE R AN GE TYPE RANGE

G,F ABY THR-999 C 999 TRK-I 4PI

Measured values of a% at £ • Table I

1 1000 MeV and deduced values of ak assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z

l/A

(mb)

£o (MeV) (mb)

Bi 3196 113 ±0.6 200 7.6 ±0.6 Pb 3145 5.4 ±0.4 220 3.6 ±0.3

T1 3110 4.1 ±0.3 230 2.8 ±0.3 Au 31.68 io±ai5 240 1.4 ±03

Pt 31.18 1. 1 ±0.08 255 (8 ±0.7) x 10' 1 Re 30.21 (3.7 ±0.3) x 10' 1 280 (2.9 ±0.3) x 10' 1 W 29.78 (3.5 ±0.3) x 10" 1 290 (2.8 ±0.3) x 10' 1 Ta 29.45 (3.3 ±0.3) x 10' 1 300 (2.7 ±0.3) x 10' 1 Hf 29.04 (1.7 ±0„2) x 10' 1 310 (1.4 ±03) x 10' 1 Yb 28Jl (1J±0.1)X 10'* 330 ( 13 ±0.1) x 10' 1 Tm 28.18 (7.5 ±0.8) x 10' 1 335 (6.8 ±0.8) x 10' 2 Ho 27.21 (3.6 ± 0.4) x 10' 1 355 (3.5 ±0.4) x 10' 2 Dy 26.80 (16±0.3)x 10' 1 360 (2.5 ±0.3) x 10' 2 Tb 26-58 • (2.5 ±0.3) x 10' 1 370 (2.5 ±0.3) x 10' 2 Gd 26.04 ( 1.6 ±0.2) x 10' 1 380 (1.7 ±03) x 10' 2 Stn 25.56 (1-3 ±0.2) x 10' 1 390 (1.4±03)x 10' 2 Nd 24.96 (9.2 ±0.9) x 10' 1 405 11 ±0.1)xI0' 2 Ce 24.00 (8 ±0.9) x 10' 1 420 (9 ±1 ) x 10' 2 La 23.39 (8.4 ±0.9) x 10'

430 (1 ±0.1)xl0' J Sb 21.36 (1.2 ±0.2) x 10' 1 460 ( 1.5 ± 0.3) x 10' 2 Te 21.19 (8.8 ±1 )xl0' 2 465 ( 1.2 ±0.2) x 10' 2 So 21.06 (1.3±0_2) x I0' 1 465 ( 1 .7 ± 0.3) x 10' 2 Cd 20.49 (1.7±0.3)x I0' 1 470 (23 ±0.4) x 10' 1 Ag 20.47 (2 ±0.3) x 10' 2 470 (2.6 ±0.4) x 10' 2 Zn 13.76 (2 j 0.4) x 10' 1 515 (3 ±0.6) x 10' 1 Cu 13.44 (14 ±0.5) x 10' 1 515 (3.6 ± 0.8) x 10'* Ni 13.35 (14 ±0-5) x 10' 1 510 (3.6 ±0.8) x 10' 1 Fe 1110 (3 ±0.6) x 10' 1 510 (4.4±0.9) x 10' 1

12

20

A.V. Mitrofanova et al

.

Sov. J. Nucl. Phys. 6^

512 (1968) .

^T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

J.R. Nix et al . , Nucl. Phys.

SU, 61 (1966) .

N. A . Perifilov et al., JETP

(Sov. Phys.)l£, 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol . 2 (IAEA) Vienna,

1965, p.283.

Fig. 1 Nuclear fissilities as a function of Z*/A Experimental points: solid circles represent our data;

squares, the data from ref. *); open circles, the data from ref.

7

); and crosses, the data from (p.f) experi- ments10

). The straight line is the best fit calculated from our data for Z

2/A > 26. The dashed curve is the curve V) calculated by Nix and Sassi 12

)t porm N3S-418

» CV. 7- 1 4-641 USC OMM-N 8 S-O C PHOTONUCLEAR DATA SHEET 9

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
'

.
"

Hf

A=1 76

Hf

A=1 76

REr A.M. Goryachev and G.I. Zalesnyi

Yad. Fiz. 26_, 465 (September 1977)

Sov. J. Nucl . Phys. Z6_, 246 (September 1977)

ELEM. SYM.

Hf

A

176

2

72

method REF. NO.

77 Go 4 hmg

11/17/80

REACTION RESUL T excitation

ENERGY

SOURCE DEtECTOR

ANGLE TYPE RANGE TYPE RANGE

G, XN ABX 8(8.1 )-22 C 8-22 BF3-I 4PI

Yidd curves and photoneutron multiplicities have been measured for the isotopes l,t- ,7, l «Hf in a betatron

’ »iui m \j. ixj-cyict siep. me measurements were muie oa-line with t computer. The crow sections were calculated from the yield curves by the Penfold- Loss method with a I .O-MeV step. The multiplicity curves were used to separate the contributions of (y.n) and (y.2n) reactions. Integrated cross sections calculated from the photoabsorption cross sections are given, and also average energies and deformation parameters. The results are compared with

calculations using various versions of the model of coupling of dipole and quadruple vibrations.

n multiplicity measurement

TABLE V. Average energies.

1 /"

Nucleus M*v *#r MeV K. MeV

’’•Hf 14.45 tUl 810 342 28.3 "•Hf u <i ft. 49 81.0 34.2 23 8 •“Ilf 11.43 U.50 31.5 34.3 29.1

FIG. 1. Multiplicity of photoneutrons for the iso- topes The

length of the vertical

lines is equal to two

standard deviations. The solid curves are the

fitted curves .Vf(£TnM) with the parameters given

in Table II.

TABLE VI. Deform Sion J and quadruple moment Q0

. TABLE VTI. Dipole strengths of trans- verse maximum.

Our data From 0i El. ; ;-v i " 1

Nucleus

0 Qv b 5 Qv b

•’•Hf 0 30*0.03 7 4*0.6 0.27 7.37 *0.17 "•Hf 0.30*0.03 7 5*0 5 025 8.81*0.07 •“Hf 0.30*0.03 7 5*0.7 025 8.83*0.06

T-<nferalload

model j?rots lor Dutydoe-Chsbar model

to | a

ty 10 | X- toi x4 >»

1 -0 086 0.923 -0.065 094 -0.12 0.86 0992 0073 1.085 0.06 0.71 0.10 3 1.921 0.003 “ .tot 0.04

TABLE II. Parameters of photoneutran multiplicity curves.

Nackti «. MeV’ W V/f «. HaV W I*/f

"•HI

"•Hf —Hf

70*0.5

5.1*03

9 3*0 8

0

00

L07

0.95

1.01

20 9

22. 8

23.0

036*0.03 046*002

0 24*0015

109

0 91

0.97

Sole, f is the number of degrees of freedom.

TABLE m. Parameters of the Loren tz curves

£, . MuV rM M«V • , . mb E..M.V r, . McV mb *

"•HI

"•Iff —Hf

t!36*0 01

12 41*0 05 1141*0.04

2.96*0 09

3.<X>*0 t 180*009

272 *9

283*10

216*8

15.71*0.06

t5 75*0 06

15 75*005

5.0*002 4.6*02

4.4*0 1

269 *5

273*5 261*4

060*007

0.67*0 07 0.65*0 07

TABLE IV. Integrated cross sections

"‘Hf '"Hf

1,0 Hf

(7UI . MeV-mb

a.,, mb

2571*12 2580* 15 2535*12

184* 1 185*1 182* 1

er.,. MeV1 mb 13.65*0.07 13.71 *0. 06 13.53*0.07

ffw,(y. 2n), MeV-mb

<7„. f MeV-mb

o^/iONZ/A

a. S'1 '

518*4 683*6 815*5

3570 3318 3188

1.007 1.003 0. 978

0. 186 0. 184 0. 179 0.00247 0.00243 0. 00236

<7Ut<T. 0.202 0. 265 0.322

cut ^60NZ/A 1.32 1.29 1. 23

foum H3S-4I8

IB ev. 7-1 4-841 USCOMM-N0S-OC

FIG. 2. Photoabsorption cross sections for the isotopes

nc.ni.isofjf The verti C al lines, whose length is two standard

deviations, indicate the cross section = trr</1 + 2crTi2n + <Jr ,np + . .

.

Above the threshold of the y, 2n ) reaction the photoabsorption cross section is indicated by the solid circles;

the smooth curves are fits by Lorentz curves with the parameters given in Table HI.

a.j n t corrected for neutron multiplicity

u.s. oepartmentof commerce

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 13
I . - . . '
Hf

A=1 77

Hf

A=1 77

15

Hf

A=1 77

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(0-1.4J3) USC OMM-OC 10896-P03 PHOTONUCLEAR DATA SHEET 17
<. N. GeLi.<ir. J. Halpern, and £. G. Muirhead

?hv&. Rev. . 13 . 1302-12 (i960; Hf 177 72

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYPE RANGE TYPE RANGE

G, N N0X THR C THR BF3-1 4 PI

THRESHOLD

Table I. Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from masa data and reaction energies. All energies are expressed in the ccntcr-of-mass system in Mev.

U met inn No. runs l'resent results Other results Method Reference

HP^Cy.rOHf17' 6.692±0.034(6.606) 6.28 ±0.06 mass data q

6.70 ±0.09 threshold k

« W. H. Johnson. Jr., and V. B. BhanoC Pity,. Rev. 107. 6 (1957).

Table n. Comparison of measured threshold energies with neutron binding energies predicted by mass data

for transitions with A/ >7/2. All energies in Mev.

Reaction A/* Observed threshold Mass data Q value Eia—Q Excited state energy Cru (y,n)Cr*1 7/2 12.18±0. 14 12.053±0.004b 0.13±0.14 . . . Y”(y,n)Y» 7/2 11.59±0.08 11.53 ±0.40" 0.06±0.41 0.387d In“*(9,»)In"« 7/2 9.22±0.03 9.35 ±0.43* —0.13±0.43 0.191* Celu

(7,n)Ce“‘ (7/2 r 7.24±0.07 6.97 ±0.07' 0.27±0.10 Nd»‘(7,»)Nd“* 7/2 6.38±0.16 5.97 ±0.19' 0.41 ±0.25 0.690* Smw>(7,»)Sm“* 7/2 6.45±0.16 5.87 ±0.28' 0.58±0.33 0.562* Er157 (y,n)ErlM 7/2 6.65±0.08 6.45 ±0.06* 0.20±0.10 0.081* Hfl ”(7,«)Hf17 * 7/2 6.69±0.03 6.28 ±0.06* 0.64±0.07 0.088* Hf‘7»(7,»)HF* 9/2 6.31 ±0.07 6.17 ±0.06* 0.14±0.09 0.093* Hf'»(7.»)Hf77» 9/2 7.85±0.11 7.32 ±0.06* 0.53±0.13 0.375*

• D. Strominger. J. M. Hollander, and G. T. Seaborg, Revs. Modem Phya. 30, 585 (1958).

b C. F. Giese and J. L. Benson, Phys. Rev. 110, 712 (1958).

• Henry E. Duckworth, Mass Spectroscopy (Cambridge University Press, New York. 1958), p. 177.

d S. Dzelepov and L. K. Peker, Atomic Energy of Canada Limited Report Tr. AECL-457 (unpublished). •The discrepancy in the case of Ceuf predicts a ground-state spin for Ce,u of 0, since the spin of Ceul is known to be 7/2.

1 W. H. Johnson. Jr., and A. O. Nier, Phys. Rev. 105, 1014 (1957).

« W. H. Johnson, Jr., and V. B. Bhanot, Phys. Rev. 107, 6 (1957).

porm NBS-418 'CV. 7. 1 4-04) 'mm-oc aeo»o.p«4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU Or STANOAROS PHOTONUCLEAR DATA SHEET 18
C.M. O ( CA.

W. D. Hamilton and B. S. Sood

Nuclear Phys. 27, 66 (1961) Hf 177 72

METHOD REF. NO. 6l Ha 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANOE TYPE RANOE

G ,G LFT 0 - 1 D 0-1 NAI-D 0 - 1 no

Used thermal broadening of 177 Lu source to supply recoil energy.

Mean lives ( 1 1 3 keV; E2)

(321 KeV; El)

1.5±0.5 nsec

17±5 nsec

FORM HBS-418

(R CV. 7-1 4-64) U9COMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 19

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. EL EM. SYM. A L.M. Dautov, Yu. A. Lysikov, U.M. Makhanov, Yu.K.

Izv. Akad. Nauk SSSR Ser. Fiz . 36, 2544 (1972)

Bull. Acad. Sci. USSR Phys. Ser. 36, 2210 (1972)

METHOD

Shubnyi

Hf 177

REF. NO.

72

72 Da 14 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.G ABX 250* S 250* sco-n 9?

a= (4.51.9) •10_27 cm2 *sr~ 1

, Fqy = (2.81.5) *10

~6 eV.

* ENERGY IN KEV

o. 10-27 cri2-sr-*

Fig. 1. Resonance scattering cross section as a function of the source temperature: 1)

^ 77

Lu -*• -

177Hf (T = 3.4-10" 6 eV,

U T ICQ ICQ

r Q/r = 0.5) 2) cd -

(r Qy

= 2.4-10 -6

eV, r Q/r = 0.96).

form N3S-418

(R EV. 7-1 4-04) USCOMM-OC 20010-P04 PHOTONUCLEAR DATA SHEET 20

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
Hf

A=178

Hf

A=1 78

Hf

A=1 78

21

B.I. Goryachev, Yu.V. Kuznetsov, V.N. Orlin,

and V.G. Shevchenko

ZhETF Pis. Red. 19, 65 (1974)

JETP Lett. 19, 41 (1974)

METHOD

N.A. Pozhidaeva,

ELEM. STM. A

Hf

REF. NO.

Z

178 72

74 Go 4 hmg

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, XN ABX 7- 20 C 7- 20 BF3-I 4PT

a(y,2n) measured but not given.

Fig. 2. Cross section aY of Hf178 Y

Note: (y,sn) cross section

determined from a(y,xn)

and statistical theory

which gives a(y,2n)

consistent with measurements .

See Refs. 6&7 for Regularization Method (Least

Structure)

.

6 A.N. Tikhonov, Dokl.Akad.Nauk SSSR 151, 501 (1963).

^B.S. Cook, Nucl.Instr. and Meth. 24_, 256 (1963).

Nucleus o,,,,, MeV-b ft e. . *

Er 166 3.05 t 0.3 0.33 7.76

Ilf 178 3,16 t 0.3 0.2C 6.72 The table lists the values of the integral cross sections a^nt calculated from Oy and the

deformation parameters 3, as well as the values Qo of the intrinsic quadrupole moments of the

nuclei, corresponding to the obtained values of 3.

FORM N3S-418

(REV. 7-14- 64) use OMM-O C 26010-P64 PHOTONUCLEAR DATASHEET 23

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARDS
REF.

METHOD

B.I. Goryachev, Yu.V. Kuznetsov, V.N.

V.G. Shevchenko

Yad. Fiz. 23, 1145 (1976)

Sov. J. Nucl. Phys. 23 , 609 (1976)

Orlin, N.A. Pzhidaeva,

ELEM. SYM. A

Hf

REF. NO.

Z

178 72

76 Go 4 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE range

G , XN ABX 7- 20 C UKN BF3-I 4PI

G,2N ABX 14- 20 C UKN SCI-I 4PI

FIG. 2. Cross section a, for I7*Hf. In the lower part of the figure we have shown the cross section for the reaction n,Hf(>,2lt ) ,76Hf (see the caption for Fig. 1).

II". 1. Photoneutron production cross section z„ cbtu.ned

for r’iio (a) and for '"'Er (b). The hollow and solid circles correspond to two independent series of data. The solid cuiv?s showrhe (y,2?i) cross sections calculated from the data of a statistical experiment by the regularization method. r ‘'' the citcles near the curves give the same cross sections calculi. ed from the formula -%(! -f(E,a)).

TABLE 5. Parameters of curve fitted to the cross

section ay In

17S Hf.

Number of resonance Ek

. MeV ».. rab

j r,. MeV

1 »*r

s

-..r.

t 12.«2 230 1 2.C..3 1.00

i \.Z0 130 | 1.0i-.r3.2; 0.21 aO.Go

3 10.07

j 1.73 ±0.20 X

s — ltl.-l. /-s 7. £.-.ti)SMeV, ' 20.0:.ieV

TABLE 1. Level-density parameters

a, MeV1 a, MeV'1

Nucleus Present work Other studies Nucleus Present work Other studies

!58 Tb •J yds! i68Er 6. 1 ±2.5 8

I 16 I

,6S Ho 4. 2 ±1.5 3. I

1151 17*Hf 17.7 ±7.

3

—

(over)

form N3S-418

(R EV. 7-1 4° 64) USCOMM-NBS-OC PH0T0NUCLEAR DATA SHEET 24

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
TABLE 2. Parameters of fitted curves ^r

<,?

,

Nvcfeia £ MtV o mb r vkv £ MeV c. mb r MeV o. rv« c x- ! E . MeV E,. MeV

'•Tb 112s im 2." 1=0 09 It76 3.42=0.13 2S6=023 1972 97 10.4 20.8 1241 213 2.31=0.02 lj.93 3.*Jl=0.u7 - 2lb.8 10.4 20.6

1221 204 274=0.11 16.23 306 3.67=0.17 3.11=0.27 170.0 97 10.4 20. b <247 21"» :ur*=o.u6 16.46 293 ',.62=0.00 2 200.8 08 10.4 20.6 •tx 1222 191 271=0.14 15.90 31/4 i.bTrO.lO 3.38=0.33 138.5 94 !0.7 20.6 1220 214 242=0.08 2B>» j.C9=0.lO * 161.7 93 ia? 20.6

"III 1268 ICG 2.76=40 13.05 281 •».0.*=0.27 4.00=1.76 1721 89 10.6 20.0 1238 :is :u:=o.u 13.46 217 :.s:=u^o 2 1*3.7 90 10.8 20.0

Mott. The lower values of the parameters in each column were found with the requirement o1 TJ :o,r, *2: 1.

TABLE 6. Integrated cross sections.

ttvckus MeV-b 9• mb ... ,*v. «... M«V-b ... *1.

lrTb .1.71 ,47 2,0 0.243 15.9 3.41 in-'

'“Ito ICO 1.51 218 02211 16 1 3X- i0-> F> 7.36 1.48 2n; 0.2.17 IB 1 ’Ul I0-*

'”1(1 3.0$ 1 20 h*g 0.106 14.8 2.63 10-'

1.41=0.3 0.23=004 3.1 IO-'=6 I0-*

12

A.N. Tikhonov, Dokl. Akad. Nauk SSSR 151 , 501 (1963),

Eng. transl. in Sov. Mathematic s-Doklady.

15

16

18

19

20

21

B. L. Berman et al., Phys. Rev. 185, 1576 (1969).

22

R. Bergere et al., Nucl. Phys. A133 , 417 (1969).

E. G. Fuller et al., Nucl. Phys. 22.' 613 (1962).

H. Arenhovel et al., Phys. Rev. 157 , 1109 (1967).

R. Bergere et al., Nucl. Phys. A121 , 463 (1968)

.

O.V. Bogdankevich et al., Zh. Eksp.Teor .Fiz . 42 , 1502 (1962); Sov. Phys. JETP 15/ 1044 (1962).

3.S. Dzhelepov in Struktura slozhynkh yader

(Structure of Complex Nuclei) , Atomizdat, 1966, p. 189.

25
«ep.

METHOO

G. M. Gurevich, L. E. Lazareva, V. M. Mazur and

G, B. Solodukhov

ELEM. SYM. A

JETP Lett. 23, 370 (1976)

Pis 'ma Zh. Eksp. Teor. Fiz. 23, 411 (1976) Hf

REF. NO.

Z

178 72

76 Gu 5 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,MU-T ABX 8- 21 C 35 NAI-D 4PI

We measured the total cross section for the absorption of rays in the region of El

resonance for the nuclei '“Ho, 17*Hf, '“Hf, "'Ta, '«W, '"Au, and J09Bi. The

singularity in the behavior of the resonance widths, observed in the region 160 < A< 18S, is apparently due to the influence of the neutron subshell N = 108.

FIG. 2. Widths r of El giant resonance in the region of nuclei with A >150

according to the data of Saclay (•), Livermore (A), and the Institute of Nuclear

Research of the USSR Academy of Sciences (O). The crosses mark the deformation parameters p.

FIG. 1. Total photoabsorption cross sections for the nuclei

l«5Ho, 1T8Hf, 180Hf, 181 Ta, mW, mAu, 209 Bi.

over

PHOTONUCLEAR DATA SHEET 25

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOP 3TANOAROS
FIG. 3. Width of Lorentz lines approximating the photoabsorption cross sections, for deformed nuclei in the region 150 < A< 185.

Nucleus

°\

mb

rt MeV

*1MeV mb

r2 MeV

*2MeV02 ^2

CT,r,

<?o b P

Ho-165 235 2.0 12.2 272 4. 0 15.5 2.3 6. 8 ±0.8 0.29

Hf-178 291 3.1 12.2 334 4. 9 15.5 1.8 7. 5 ±0. 8 0.28

Hf-180 286 3.2 12.2 324 5.1 15.3 1.8 7. 2 ±0. 8 0.27

Ta-181 272 3.0 12.1 316 5.

1

15.0 2.0 6. 8 ±0. 8 0.26

W-182 267 3.2 11.9 303 5.6 14.8 2.0 7. 2 ±0.8 0.26

Au-197 535 5.2 13.7 ... ... ... ... • • • ...

Bi-209 600 4.6 13.8 ... ... ... ... • • • ...

27
fief. A.M. Goryachev and G.I. Zalesnyi

Yad. Fiz. 26, 465, (September 1977)

Sov. J. NucT. Phys. 26_, 246 (September 1977)

ELEM. SYM.

Hf 178 72

REF. NO.

77 Go 4

hmg

11/17/80

RtA^’ION EXCITATION ENERGY

SOURCE OETECTOR

G,XN ABX 7(7 .6)-22 3-22 BF3-I 4PI

Yield curves and photoneutron multiplicities have been measured for the isotopes in a betatron bremsstrahlung beam in the energy range 8-21 MeV with a 0.125-MeV step. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the Penfoldi method with a 1.0-MeV step. The multiplicity curves were used to separate the contributions of

(y.it) and (y,2n) reactions. Integrated cross sections calculated from the photoabsorphon cross sections

are given, and average energies and deformation parameters. The results are compared with

calculations using various versions of the model of coupling of dipole and quadrupole vibrations.

n multiplicity measurement.

TABLE V. Average energies.

1/M

Nucleus M.V MeV £ma

' c K, MeV

•’•Hf 14.45 14J1 81.0 34.2 28.3 •"Hf 14.41 14.40 81.0 34.2 28.8 '“tit 14.43 14.50 31.5 34.3 29.1

FIG. 1. Multiplicity of photoneutrons for the iso- topes The

length of the vertical

lines is equal to two

standard deviations. The solid curves are the

fitted curves AJ(£rsml) with the parameters given

in Table II.

TABLE VI. Deformation (3 and quadrupole moment Q0

. TABLE vn. Dipole strengths of trans- verse maximum.

Our data Fron«£2.2'-0[)

Nucleus

0 Q* b 9 Q«. b

•"Hf 0 30*0.03 7.4±0.6 0.27 7.37 ±0.1

7

‘"Hf 0.30*0.03 7 5±0.5 0.25 6.81*0.07 '“Ht 0.30±0.03 7.5±0.7 0.25 6.83*0.06

7-Rnbrauoual modal

Noaaxial rotator model model

I to | \Y Aj (0 1 ip X. 10 1 xp

. -0066

0.092

1.921

0.923

0.073

0.003

-0.085

1.085

0.94

0.06

-0.12

0.71

.1.01

0.86 0.10

0.04

TABLE II. Parameters of photoneutron multiplicity curves.

Nacleas «. MeV" w vn a, MeV* w V/f

"•Hf 7.0±0.5 0 L07 20.9 0.36*0.03 1.09 "Hf 5.1 ±0.3 0 0.95 22.0 0.46±0.02 0.91 ‘“Hf 9.3*06 0 1.01 23.0 0.24*0.015 a97 Note. / is the number of degrees of freedom. TABLE IH. Parameters of the Lorentz curves.

Nodeus MeV r|f MeV a, , mb MeV r, , MeV mb R

•"Hf 12.36*0.04 2.96±0.09 272±9 15.71±0.06 5.0*0.02 269*5 0.60*0.07 "Hf 12.41*0.05 3.00*0.1 283±10 15.75±0.06 4.6±0.2 273*5 0.67 ±0.07 '"Hf 1241*0.04 280*0.09 286*8 15.75±0.05 4.4±0.1 281±4 0.65*0.07

TABLE IV. Integrated cross sections

HSjjf mHf "°Hf

cr,,,, MeV-mb 2571*12 2580*15 2535*12

<r.

t , mb 184*1 185*1 182* 1

(j.,. MeV*' mb 13.65*0.07 13.71*0.08 13.53*0.07

2n), MeV-mb 518*4 683*6 815*5

l> MeV-mb 3370 3318 3188

crut/60tfZA4 1.007 1.003 0.978

0. 186 0. 184 0. 179

<7.yT s/5 0.00247 0.00243 0.00236

<rllt (y, 2n)/crllt 0.202 0.265 0.322

<rut £/60NZ/A 1.32 1.29 1.23

FIG. 2. Photoabsorption cross sections for the isotopes

I76,i78,i80jj£_ The vertical lines, whose length is two standard

deviations, indicate the cross section rjn = <Jr>„+ 2<TT>2n + crriB> + . . . Above the threshold of the y, 2n) reaction the photoabsorption cross section is indicated by the solid circles;

the smooth curves are fits by Lorentz curves with the parameters given in Table III.

a. . corrected for neutron multiplicity

int

FORM N3S-418

(R EV . 7-1 use OMM-N BS-OC PHOTONUCLEAR DATA SHEET 13

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Rcr- G.M. Gurevich, L.E. Lazareva,

G.V. Solodukhov, V. A. Tyutin

Nucl . Phys. A351 , 257 (1981)

V.M. Mazur, S.Yu. Merkulov, EL EM. SYM.

Hf 178 72

MCTHOO REF. NO.

81 Gu 2 hg

REACTION result EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE NANCE TYPE RANGE G.MU-T ABX THR-20 C 27 NAI-D 4PI

\bsiraet : The eurv es of the lot il gamm.i-abskjrption cross sections i<t„„ in the El giant resonance energV

ranee lor (he nuclei '“Sm. 1 ‘"Gd. '"’Ho. ; "»Er. : '*Yb. '’’Hf. !,0 Hf. ""Ta. ' s: W. '**W. ' so W

and l '* Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections rr,„ are given. Quadrupole moments |(? U ) and nuclear deformation

parameters I/O were obtained. For delormed nuclei in the - 155 < t •: - ISO region a violation of the correlation between

giant resonance widths if i and nuclear deformation parameters was found, f, and f ;

. the widths

of the resonances corresponding to v ibralions of nucleons along and across the nuclear deformation

axis, were observed to decrease with the increase ol i which could be accounted for by the presence

it an V = IOM subshell

NUCLEAR REACTIONS ‘‘^Sin. ""Gd. '" Ho. ,M Er.

, ‘ i Yb. '"'•"'"Hf. ""Ta.

:s; iu i“'>\v. "* \u i . X). a; = 7 20 MeV . measured total it( E): deduced integrated it. Lorentz line parameters "‘Sm. ‘'"Gd. '"'Ho. ; ""Er. ' '*Yb. 1 ""’Hf. ""Ta. '" 2 "">W. " Au deduced It. Q... / . giant resonance evolution Enriched, natural targets.

(OVER)

U.S. DEPARTMENT OF CO'.IMEPC NATIONAL BUREAU O” S T A >! 3 A R 3 ?
Table 2

Parameters of Loremz curves fitting the experimental data on <r lol

Nucleus

E, G | r, £, G A r

,

<T.f, r

(MeV) (mb) (\1eV) (MeV) (mb) (MeV) aj, (MeV)

1

5

*Sm 112 1 88 3.4 15.7 207 5.7 1.85 8.1

1 ’“Gd 113 206 3.2 15.7 220 5/5 l.SI 7.7

,<,5 Ho 12.3 202 2.3 15.2 239 4.8 2.47 7.0

l6, Er 11.9 3.2 15.5 275 4.5 1.73 7.4 ‘’*Yb 12.3 297 2.9 15.5 320 4 9 1.80 7.1

l " 8 Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2

l80 Hf 12.2 2S6 3.2 15.3 324 5.1 1.81 7.1 mTa 12.1 272 3.0 15.0 316 5.1 1.97 6.8

,8 -w 11.9 267 3.2 14.8 303 5.6 2.01 6.8 "*W 11.9 315 2.9 14.8 321 4.7 1.65 6.8

1 12.0 246 3.3 14 5 332 5.1 2.07 6.4

1,7 Au 13.7 535 5.2

Average

error

1.4 1 1.2 9.3 1.5 °„ 9.7 "

0 4 6°„ 0.22

0.2 MeV

T Mil i 3

Ratio* of nuclear ellipsoid axes (A ). deformation parameters ( /!) and intrinsic quadrupole moments ((?„). calculated from A.', //,

Nucleus ' ' 4 Sm ''T'.d ""Ho “’"Hr ‘•Yb , '

,, lll

l81, Hf ,8, Ta 1 M2 \V 1 8a W '"'•w

A 1 321) 1 302 1 259 1.327 1 289 1.296 1.281 1.263 1.271 1.268 1 229

/< 0 326 0 309 0 266 0.334 0.296 0.303 0.288 0 270 0.278 0 274 0 235

At) III 7 *0 016 + 0 036 + 0 032 ±0 024 ±0 032 + 0 036 + 0 026 ±0.030 ±0032 ± 0 03 .3

6 3 6 2 5.8 7 5 7 0 7.5 7.2 6 9 7.2 7 1 6 2 V 0 7 t 0 3 -0 8 + 0 7 4-<l 6 + 0 8 + 09 + 0 7 + 0 8 H) « +• 0 9

Tari i 4

Integral characteristics of HI giant resonance

Nucleus 'm-r e»p 'Tu a i " ii. -T.,,,4 fj , a - 21. * VJ (MeV b) 0 06,\/ .4 (MeV b) 006.3/ ^ (mb) (mb) (mb) (mb • MeV ) (mb MeV 1 (/ib- MeV - ')

'“Sm 1 94-0 06

' 0.87 2.86 1.29 1 17 + 3.5 156 0 189 9.1 ±0.3 14.3 3.23 '"(id 2.07-0.07 0 91 2.95 1 .30 143 + 46 163 0.194 10.5 ±0.4 14 9 3.30 "‘Ho 1 S6r o 06 o ’s 2.53 1.06 155 ±4.4 160 0.177 10. 1 ±0.3 12.6 2.54 ""Lr 2.24 + 0.06 0 92 3.07 1 26 161 ±4.3 197 0.212 1 2.0 ±0.3 16.0 3 13

l ‘‘ ,

l b 2.69-0.05 1.07 3 82 1.52 195 ±3.4 240 0.247 14.5 ±0.3 19 2 3 54

1 "*Hf 2 85 r 0.07 l.l 1 3.99 1.55 208 + 4.9 247 0.247 1 5.3 ± 0.4 20.2 3.59 ""HI 2. *2 -0 06 1.05 4 03 1.56 200 + 4.4 250 0.246 15.1 ±0.3 20.7 3 61 “'Ta 2.84-0.0'’ 1.09 3 81 1.46 2 1 0 ± 5.3 245 0.239 1 6.0 ±0.4 20.0 3.45 2.86 + 0.07 1.09 4.01 1.52 21 1 ±5.3 256 0 248 16.2±0.4 21 6 3 70 ""‘W 2 ’8^007 1 05 3.80 1.43 207 ±5.3 251 0.240 1 5.9 ±0.4 20 9 3.51 “"W 2.90 — 0 07 1 08 3.95 1 48 21 4 ± 5.3 256 0.241 1 6.2 ± 0 4 21.6 3.56 "Au 3 12 r 0 06 1 10 4 37 1.54 229 + 4.2 276 0 241 18.6+0.4 23 3 3.49

30


FORM NBS-418 U.S. DEPARTMENT OF COMMERCE

(9*1*63) NATIONAL BUREAU OF STANDARDS . USCOMM-OC 1S996-R63 PHOTONUCLEAR DATA SHEET 33
K. N. Gel ter. J. Hal pern, and L. G. Muirhead

Phys. Rev„ 1 18 . 1302-12 (i960) Hf 179 72

'ETMOOBetatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TVPK HANOI TYPl RANGE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary

fromandmaw

comparison of neutron separation energies inferred from present threshold measurements with values predicted data and rcacUon energies. All energies arc expressed in the centcr-of-mass system in Mev.

P

UnirliiNi Nu. runs Present results Ollier results Method Reference

Hf""(7,n)HP7» 6.31 ±0.07(6.21) 6.17 ±0.06

6.52 ±0.12

mass data

threshold

* W. H. Johnson, jr.. and V. B. Bhanot. Phya. Re*. IOT. 6 (I9J7).

Table II. Comparison of measured threshold energies with neutron binding energies predicted by mass data

for transitions with A/ >7/2. All energies in Mev.

Reaction Cr“(y,»)Cr« Y" (7,11 )YM

Inu*(7,n)In114 Ce14J

( 7,n)CeM1 Nd145 (7,n)NdIM Sm^’^fliSm141 Er“7

( 7,»)Er14 » Hfln

( 7,n)HP7* Hf'7»(7,»)HP7 » Hf1 “(7,»)HP7»

Observed threshold Mass data Q value Eu. - Q

7/2 12.18±0.14

7/2 11.59±0.08

7/2 9.22±0.03

(7/2)* 7.24±0.07

7/2 6.38±0.16

7/2 6.45±0.16

7/2 6.65±0.08

7/2 6.69±0.03

9/2 6.31 ±0.07

9/2 7.85±0.11

12.053±0.004b 0.13±0.14

11.53 ±0.40" 0.06±0.41

9.35 ±0.43" —0.13±0.43

6.97 ±0.07' 0.27±0.10

5.97 ±0.19' 0.41±0.25

5.87 ±0.28' 0.58±0.33

6.45 ±0.06* 0. 20±0.10

6.28 ±0.06* 0.64±0.07

6.17 ±0.06* 0.14±0.09

7.32 ±0.06* 0.53±0.13

Excited state energy

0.387-* 0.191*

0.690*

0.562*

0.081*

0.088*

0.093* 0.375*

J !?• Strominger. J. M. Hollander, and G. T. Seaborg. Revs. Modem Phys. 30. 585 (1958). "C. F. Giese and J. L. Benson, Phys. Rev. 110, 712 (1958).

' ' !Se

2.ry .^' Duckworth. Mass Spectroscopy (Cambridge University Press. New York. 1958), p 177

. D5- epov and L‘ *5- Pe *tcr. Atomic Energy of Canada Limited Report Tr. AECL-457 (unpublished)

< w“'H.WhSSS'jr". andTa Nier. ( $7)°' °f °’ lince the 9pin °f CeM‘ 13 >“ to *

« W. H. Johnson. Jr., and V. B. Bhanot. Phys. Rev. 107, 6 (1957).

• . NBS.418

* I A- f\ 4 • PHOTONUCLcAR DATA SHZcT 34

u.s. oepartmentof commerce

NATIONAL BUREAU OF ST ANQAROS
REF. A. Veres

Acta Phys.

METHOD

ELEM. SYM. | A

Acad. Sci.Hung. jj3 , 26 L -73 ( 1963 ) Hf 179 72

REF. NO. Radioactive source 63 Ve 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.G/ ABX 0 - 1 D 0-

1

NAI-D

ISOMERS

Ta6JiHua II H3MepeHHue 3HaMeHiiH nocae ooayMeHiiH. cpaamiBae.Mbie c apyniMH anTepaTypHbiMii A2HHUM1I

3nCMCHT

AKTHBHOCTb

o&ny<teHM« nocne

Aktmbm.

DKCTpn.

ft KOHUC

JlyreparypHue JaHHbie jaHHue H3MepeHMR

crm r* ym

(10—bb) ncpsoro HOMcpen HR

(HMfl/MHH.)

oonys. (hmn/ MHH.) T,„ E

(K3B) E(K3B)

(10-“CM«)

S«-77m 3842 -96 5400 17,5 cex. 160 18.13:1 cex. 160± 10 9,5 1,75 Sr-87m 191 ±5 200 2.8 m. 390 2.9 ±0.1 m. 365 =25 0,85 0,2 y-89m 96 ±20 170 16 cex. 910 16,7±5ceK. 0,08 0,02

Rh-I03m 28 =5 31 57 MHH. 40 58±2 mhh. 20,5 ±0,5 0,08 0,01 Ag-107m 220-14 250 44 cex. 93 43,8 ±0.6 cex 91 ± 10 0,8 0,2 Ag-109m 39 cex. 88 Hf-179m 80 ± 18 155 19 cex. 160; I9±2cex.

215

1 0,2

Ir-191m 90-20 250 4,9 cex. 42; 5 ±2 cex. 130

5,6

Pt-l95m 90±9 100 3,5 a. 31; j 3,5 ±0,2 a.

100; ; 130;

32=3

67,5 ±5

96±5

130± 10

0,2 0,04

Au-197m 240-16 520 7.2 cex. 130; j 7,2± 1 cex. 277; 40768:130: 280±20

390-20

0,07 0,01

Hg-199m 9.63:3.2 42 MHH. 160; 370

0,005 0,001

Aam Phy$. Hung. Tom. XVI. Fasc. 3.

FORM NBS-418

IR IV. 7-1 4-64) USCOMM-OC 26 0 1 0- P6 4 PHOTOHUCLEAR DATA SHEET 35

U.S. DEPARTMENT OF COMMERCE

NATIONAL 0UREAU OF STANDARDS
M. Boivin and V. Zecevic

C.R. Acad. Sc. Paris 270, 1627 (1970)

ELEM. SYM. A

Hf 179 72

REF. NO.

70 Bo 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

-G.fi. ABI 0 - 2 _a_—L act-1 4PI

6 LEVELS

Indirect Activation

of 18.6s 378 keV level

by .5-2.0 MeV bremsstrahlung.
Tadleau.

E (\eV% (cm‘.MeV). a (eV).

65o ± 10 5,7 + 5 ’*.io-"

““A 9 7 0 7 + 0 ’ 7

’ 7 —o,6*

8?o ± 10 i 7 + I

’ 7 1,7 —' .4* io3o ± 10 i,5 + I,7 — .io-»» 1,»

6 8 +4 * 6

i i 6o i io 1,1 ® . 1 o

-11 —',5 + 6,6

7,7 —5

’

/ + *° Uoo 1,0

1

’ *

. IO-*' —0.7

. « +°> 6

- , + «o i6o5 - , + 3 , i '• 3 —

—*,*

IO-’

IO~’

IO-T

IO~’

IO-*

I

O

-*

37

Hf

A=180

Hf

A=1 80

39

Hf

A=180

*•'-) J. Ha, pern, <. '.c c. . G. Muirheaa

jjj, 1302-12 (i960)

£L £M. STM. *

H£ ; 180 72

•* c tmoc

Becacron: neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION SOURCE DETECTOR

ENEROY TYPE RANGE TYPE RANGE

« JLE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

1

Talus L Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from most data and reaction energies. All energies arc expressed in the center-of-mass system in Mev.

I< CiU'l i* H| Nu. runs Present results Other results Method Reference

HP“(y.i*)HP" 7.85 ±0.11(7.48) 7.32 ±0.06 massu.’ta q 'W.H. Johnson. Jr., and V. B. Bhanot. Phya. Rev. 107. 6 (19S7).

Table II. Comparison of measured threshold energies with neutron binding energies predicted by mass data

for transitions with Si >7/2. All energies in Mev.

Reaction Si* Observed threshold Mass data Q value Eoc-Q Excited state energy CH*(y.n)Cr" 7/2 12.18±0.14 12.053 ±0.004b 0.13±0.14 Y"(y.»)Y“ 7/2 11.59±0.08 11.53 ±0.40* 0.06=0.41 0.387«< In“‘(y.»)In‘“ 7/2 9.22±0.03 9.35 ±0.43* — 0. 13±0.43 0.191* CeM*(7,»)Ce*" (7/2)* 7.24±0.07 6.97 ±0.07' 0.27±0.10 Nd“*(7,n)Nd“* 7/2 6.38±0.16 5.97 ±0.19' 0.41 ±0.25 0.690* Sm14, (y,»)Sm“' 7/2 6.45±0.16 5.87 ±0.28' 0.58=0.33 0.562* Erin (y,n)Er1M 7/2 6.65±0.08 6.45 ±0.06* 0.20±0.10 0.081* Hf»"(7,»)HP" 7/2 6.69±0.03 6.28 ±0.06* 0.64±0.07 0.088* HP’Vy.'OHP7 ' 9/2 6.31 ±0.07 6.17 ±0.06* 0.14±0.09 0.093* Hfl *(y,»«)HP7» 9/2 7.85±0.11 7.32 ±0.06* 0.53±0.13 0.375*

• D. Strominger, J. M. Hollander, and G. T. Sea bore. Rev*. Modem Phy*. 50, 585 (1958).

• C. F. Giese and J. L. Benson. Phy*. Rev. 110. 712 (1958). •Henry E. Duckworth. Han Spectroscopy (Cambridse University Pres*. New York. 1958). P. 177.

« s Dielepov and L. K. Peker. Atomic Enerey o( Canada Limited Report Tr. AECL-457 (unpublished).

• The discrepancy in the caae of Ce,u predicts a (round-state soin for Ce1 ** of 0. since the spin of Ce‘“ is known to be 7/2. MV. H. Johnson, Jr., and A. O. Nier. Phya. Rev. 105. 1014 (1957).

• W. H. Johnson. Jr., and V. B. Bhanot. Phys. Rev. 107. 6 (1957).

u NBS-418 MS. S4

u.s. departmentof commepcf

NATIONAL. SUBEIIJOr STACCJAn PiiOTONUCL EAR DATA SMZCT 41
ReF- A.M. Goryachev and G.I. Zalesnyi

Yad. Fiz. 26, 465 (September 1977)

Sov. J. NucT. Phys. 26, 246 (September 1977)

ELEM. SYM.

Hf 180 72

METHOD REF. NO.

77 Go 4

hmg

11/17/80

REACTION EXCITATION ENERGY

SOURCE DETECTOR

G,XN ABX 7(7.4) - 22 8-22 BF3-I 4PI

Yield curves and photoneutron multiplicities have been measured for the isotopes in * betatron bremsstrahlung beam in the energy range 8-21 MeV with a 0.125-MeV step. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the PenfoldLeiss method with a 1.0-MeV step. The multiplicity curves were used to separate the contributions of (y,n) and (y,2 n) reactions. Integrated cross sections calculated from the photoabsorption cross sections are given, and also average energies and deformation parameters. The results are compared with

calculations using various versions of the model of coupling of dipole and quadrupole vibrations.

t/M

n multiplicity measurement.

TABLE V. Average energies.

Nucleus ‘at m,v MeV £.V A‘* K, MeV

’’•Hf 14.45 14J1 81.0 14.2 28.3 ‘"Hf 14.41 14.49 81.0 14.2 28.8 "•Ilf 14.43 1 4.50 31.3 34.3 29.1

FIG. 1. Multiplicity of photoneutrons for the iso- topes nM’MMuf. xhe

length of the vertical

lines is equal to two

standard deviations. The solid curves are the

fitted curves M(Errmi) with the parameters given

in Table II.

TABXE VI. Deformation (3 and quadrupole moment Qa

. TABLE VTL Dipole strengths of trans- verse maximum.

Our data From 0t El. l"!

Nucleus

0 Q% b P 0* b

"•Hf 0.30*0.03 7. 4±0.6 0.27 7.37*0.17 ‘"Hf 0.30±0.03 75*0.5 0.25 6.8 1*0.07 "•Hf 0.30*0.03 7 5*0.7 0.25 8.83*0.06

T-*tbrauonal model

Nonasial rotator model Davydov—Ch*ban model

to | AjV Aj (0 1 VP X. ( 0 | A

t y>

123

-0.086

0.992

1.921

0.923 0073

0,003

-0.085

1.085

0.94

0.06 -0.12

0.71

.1.01

0.86 0.10 0.04

TABLE II. Parameters of photoneutron multiplicity curves.

Nucleus «. M«V‘ w X*// «. MeV w f/t

"•Hf 7.0*0.5 0 1.07 20.9 0.36*0.03 1.09 ‘"Hf 5. 1*0.3 0 0.95 22.6 0.4fi±0.02 0.91 IMHf 9.3±0.6 0 1.01 23.0 0.24*0.015 0.97 Note. { is the number of degrees of freedom. TABLE III. Parameters of the Lorentz curves.

Nucleus Ex

, MeV T,. MeV al

, mb MeV r, , MeV mb »

"•HI ‘"Hf

"•Hf

li36±0.04

12.41*0.05

12.41*0.04

2.96*0.09

3.00*0.1 2.80*0.09

272*9

283*10 236*8

15.71*0.00 15.75*0.06

15 75=005

5.0*0.02

4.6±0.2

4.4*0.

1

269*5 273*5

281*4

0.60*0.07

0.67 *0 07

0.65*0.07

TABLE IV. Integrated cross sections

176jj| ”*Hf l«»Hf

<7ut, MeV-mb 2571*12 2580*15 2535* 12

<r. 1( mb 184*1 185*1 182* 1

cr.j, MeV*1 mb 13.65*0.07 13.71*0.08 13.53*0.07

trut (y,2n), MeV-mb 518*4 683*6 815*5

cru, L, MeV-mb 3370 3318 3188 <j^JWNZ/A 1.007 1.003 0. 978

<7..A**' 3 0. 186 0.184 0. 179 0.00247 0.00243 0.00236

(Tutlf. 2n)/(Ttat 0. 202 0.265 0.322

<T„t l/60NZ/A 1.32 1.29 1.23

FIG. 2. Photoabsorptian cross sections for the isotopes

176,178,180^ The vertical lines, whose length is two standard

deviations, indicate the cross section <7^ = <rT> „+ 2or<2H + or,i» + . . . Above the threshold of the y, 2n) reaction the photoabsorption cross section is indicated by the solid circles;

the smooth curves are fits by Lorentz curves with the parameters given in Table III. a

int correc

'tec* f° r neutron multiplicity

form N3S-418

(R EV. 7-1 4-641 USC OMM-N BS-DC

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 42
G.M. Gurevich, L.E. Lazareva,

G.V. Solodukhov, V. A. Tyutin

Nucl . Phys. A351 , 257 (1981)

KtTMOO

V.M. Mazur, S.Yu. Merkulov, EL EM. SYM.

Hf 180 72

hg

REF. NO. 81 Gu 2

REACTION RESULT EXCITATION ENERGY

G.MU-T ABX THR-20

SOURCE DETECTOR

27 NAI-D

Abstract: The curves of the total gamma-absorption cross sections (u,,.) in the El giant resonance energy range lor the nuclei

' '•‘Sm.’

1 ‘"Gd. ‘"’Ho. -*Er. 1 " 1 Yb. ‘'"Hf. 1,0 Hf. ""Ta. “ : W. ,,*W. l »*W

and * Au have been measured using the absorption method. Parameters of the Lorentz curves

rilling the measured cross sections ir, „ are given. Quadrupole moments t(? 0 ) and nuclear deformation

parameters I/O were obtained. For deformed nuclei in the ~ 1 55 < -t < - 180 region a violation of the correlation between

giant resonance widths if) and nuclear deformation parameters was found, f, and f,. the widths

of the resonances corresponding to vibrations of nucleons along and across the nuclear deformation

a*is. were observed to decrease with the increase of -I which could be accounted for by the presence of an .V = I OX subshell

ANGLE

range

4PI

fig. 2. Total nuclear ; •absorption cross sections ( /r ) measured - ,s"Gd. -’Ilo. -'Fr. ‘••‘Yh. ‘ 'Ilf. —Hf. -‘Ta. '"’W. '"‘W.

shown.

by the absorption method for 1 , '1 Sm.

'""W and Au. I(ms error bars arc- 43

(OVER)

U.S. [DEPARTMENT c- COmMSPC:

NATIONAL BUREAU O “ STAMG4R3S
Table 2

Parameters ot' Lorentz curves fitting the experimental data on a,

Nucleus

E< (MeV) (mb)

r, (MeV)

£. (MeV)

a : (mb)r. (MeV)

<r ,r, a,r ,

r (MeV)

13 *Sm 12.2 188 3.4 15.7 207 5.7 1.85 8 1 l!6 Gd 12.3 206 3.2 15.7 220 5.5 I.SI 7.7

l65 Ho 12.3 202 2.3 15.2 239 4.8 2.47 7 0 “*Er 11.9

*>*>*> 3.2 15.5 275 4.5 1.73 7.4 '**Yb 12.3 297 2.9 15.5 320 4.9 1.80 7.1

1 ' * H f 12.2 291 3.1 15.5 334 4.9 1.80 7.2 "*°Hf 12.2 2S6 r- 3.2 15.3 324 5.1 1.81 7.1

l »'Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8 "*-w 11.9 267 3.2 14.8 303 5.6 2.01 6.8

l«AW 11.9 315 2.9 14.8 321 4.7 1.65 6.8

1 12.0 246 3.3 14.5 332 5.1 2.07 6.4 '•’Au 13.7 535 5.2

Average

error 1.4", 11.2 °

0 9.3 1.5 °„ 9-7 4-6 0.22

0.2 MeV

Taiii i

Ratios of nuclear ellipsoid axes (A ). deformation parameters (

/

1) and intrinsic quadrupole moments ((?„). calculated from £,.

Nucleus ' '‘Sm 1 '"Gd ""Ho ""*Er 1 ' J Yb ''"HI ""’Ilf ‘"‘Ta IH2 W ,IU W IB" W

1 320 1 302 1 259 1.327 1 2X9 1.296 1.281 1.263 1.271 1.268 1 229

0 326 0 309 0 266 0.334 0 296 0.303 0 288 0.270 0.278 0.274 0 235 P + 0 01 7 ±0 016 ± 0 036 + 0 032 ± 0 024 + 0 032 ±0 036 + 0.026 + 0.030 ±0 032 + 0 03.3

LK

6 .3 6 2 5.8 7 5 7 0 7 5 7.2 6 9 7.2 7 1 6 2 A (1 3 * 0 3 AOS + 0 7 * 0 8 + 0.9 + 0 7 + 08 + 0 X 4 0 ^

Tabi i 4

Nucleus (MeV b)

aO «»p 0.06.VZ -1

' 51 Sm 1.94 ±0.06 0.87 '"Gd 2.07 ±0.07 091

'"‘llo 1.86*0 06 0

78 "" f: r 2 24 ± 0 06 0.92

1 '-“N b 2.69 ±0 u5 1.07 ''nit 2.85 ± 0 1)7 III ""Hi 2. '2 ±0 06 1.05 "'Ta 2.84 ± 0 1)7 1.09

' -

- w 2s6 ± 0 1)7 1 09 "4 \\ 2 "8-0 07 1.05 2.40 -o 07 1,08 Au 3 12 * U 06 1 10

Integral characteristics ol El

ff

t»l. ^lll a i (MeV b) 0 06.Y/ .4 (mb)

2.86 1 29 117 + 3.5 2.95 1.30 14.3 ±4.6

2.53 1 06 1 55 ±4.4

3.07 1.26 161 ±4.3

3.82 1.52 195 ±3.4

3 99 1.55 208±4 9 4 03 1.56 200 ±4.4

3 81 1.46 2 1 0 ± 5.3 4 01 1.52 21 1 ± 5.3 3.80 1.43 207 ±5.3

3.95 1.48 2 1 4 ± 5.3 4.37 1.54 229 ±4.2

giant resonance

" ii.

-r

, , 5 a , (mb) (mb) (mb MeV

156 0.189 9.1 ±0.3

163 0.194 10.5 ±0.4

160 0.177 10.1 ±0.3

197 0 212 1 2.0 ± 0.3 240 0.247 14.5 ±0.3

247 0.247 1 5.3 ± 0.4 250 0.246 15.1 ±0.3

245 0.239 1 6.0 ± 0.4 256 0.248 1 6.2 ± 0.4 251 0 240 1 5.9 ±0.4

256 0.241 16. 2 ±0.4

276 0 241 18.6±0 4

it 2 l a n

(mb MeV ') (,ib MeV ')

14 3 3 23

14.9 3.30

12.6 2.54

16 0 3 13 19.2 3.54

20.2 3.59

20.7 3.61 20 0 3.45 21.6 3 70

20.9 3.51 21.6 3 56

23.3 3 49

44
Ta

A=181

TANTALUM

1=75

Anders Ekeberg reported the discovery of a metallic nature

in some mineral samples taken from Sweden and Finland.

Because of the frustrations and problems encountered in

defining the properties and chemical nature of the new element, Ekeberg named the substance after Tantalus, a Greek

mythological character. Tantalus was a Phrygian king who,

for his crimes, was condemned to remain in Tartarus,

standing, unable to drink or eat, chin deep in water with

fruit-laden branches hanging above his head.

Scrap tantalum is reworked by moderate heating in j

pressurized hydrogen. The metal increases in volume by a factor of 740 when heated to a dull red, becomes brittle, A= 181

and is easily pulverized. The powder obtained is washed in

acid and further heated in vacuum to a higher temperature to

expel the hydrogen. This powder is then used to produce

ingots which have properties not quite like those of the

primary metal

.

45

Ta

A= 181
'
REF. Sven A. E. Johansson

Phys. Rev. £7, 434*43 (1955)

METHOD

Synchrotron ; ZnS counter; ion chamber

ELEM. STM. A

Ta

REF. NO. 55 Jo 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.N RLY THR - 65 C 65 SCI-D 5

* + DST

G,N RLY THR - 65 c 65 SCI-D 10 - + DST

'to. 8. The angular distributions of the neutrons from tantalum. Counter thresholds at 5 and 10 Mev.

2

Curves of Form a + b Sin 0

Fic. 11. The relative yield per mole for neutrons above 7.5 Mev

as a function of the neutron number.

form NBS-418 IMV. 7.1 4-MI USCOMM-OC 2S010-P64 PHOTONUCLEAR DATA SHEET 47

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
Ref. M.E. Toms, W.E. Stephens

Phys. Rev. 98 . 626 (1955)

Elem. Sym.

Ta 181 75

Ref. No.

55 To 1

Method Betatron; protron spectrum, yield, angular distribution; nuclear

emulsions NVB

Reaction E or A E S'

dE J

"• Notes

Ta

l8l

( Y,xp) Brerass 23

Fig. 1. The histogram gives the energy distribution of the photoprotons from tantalum exposed to 23-.Mev bremsstrahlung The smooth curve is the distribution calculated for the direct process and normalized to the observed protons. The dashed

curve is the calculated distribution for the evaporation process

fitted to indicate the maximum possible evaporation yield. The

shaded groups are background.

Fig. 3. The numbers of tantalum photoprotons per unit solid angle in arbitrary units is plotted as a function of their angle from the photon direction. In addition, the crosses show the angular distribution of photoprotons of 8 to 12 Mev energy, the

« irclcs photoprotons over 13 Mev.

Z protons Hr (Mevi*

A* neutrons Hr (Mev i* Y, f..»*crv«l>

(Mt* protons mole 1 roentgen -1

) betatron energy (Mev)

l\.(e:dc. direct i (Hi* protons mole-1 roentgen -1

1

I VmIn. i rp (calc. direct)

)’,.(< ale. evap. I (Ht4 protons mole 1 roentgen ')

I

. (oIk i J' p (cidc. evap. I

Possible olis. e Migular distr. eap

.S33.76

126

<0.3

far forward 6

8 02

26

7 3.S

130.002

1300

<0,2

far forwa

68

60

•> 05

(>') direct) ( >8 direct) 23 24

<3

forward 6

' M Almy, L_

tcv. 02. St,

l

,fis

01. J,1 i I0S.I).

form NBS-418

(8-1-63) USCOMM-OC 18556-P63 PH0T0NUCLEAR DATA SHEET 48

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREA',' OF STANDARDS
i. fl.I. Gavrilov, L.E. Lazareva

Zl.ur. Eksp. i Teoret. Fiz. ^0, 855 (

I

95

6

);

Soviet Phys. JETP 87 1 ( 1957)

Elem. Sym.

Ta 181

z

73

Muhoa y-Bremsstrahlung; synchrotron; BF^ counter

Reaction E or A E a d E

Ref. No. 56 Ga 1 EGF

J

rr Notes

(Y,xn)5tr 8-27 14.5 6.8 3.87 MeV-b

K> - 8-27 13.9 4.5 2.74 MeV-b

rowM NBV4H

uteouM'OC iaaaa*p«»

Ta3L£ 1. r uaaaacn:al characteristics ci photottcctrort cross sections.

c. 0ft cut riuil •> idth '0- (El aEion

in barns

in mev £

,n mov-bams

Conner

Zinc Caaaiurn

i1 :.;.o

0.123 4.3

1 6.2 *

t "i !

0.03

u.06

2.28

8.1 3:3

i is.: 0.283 6.0 ; 2.u5 3.2 Tiai..un oy.'2 : 3.37 3.6 Coic 14.2 0.571 1 « w ! 4 37 7.6

T.ia... -ra 1 ! • . 6 0.C5C 4.30 7.6

Oisr..... iZ.'J 0.357 S *| 1 3.06 7.4

Tao::-_-a 1 14.3 0.703 j 5.6 i C 32 3.0

Uran:cm t'.-l 1 G..3 13.5 10.6

1 AJLE II. Threshold of phoioncuiron reactions ( mev ).

Element (T. n) (T. 2n) ( T. an,

Cadmium ,.7 !4.C 23.0 >30

iodine 9 .4 16.2 26.0 32.9 T.inLaium 7.6 13.9 21.6 28.2 Cold S.l 14.9 23.9 >30

Thallium 7 .5 !4.n 0*> 28.8 Uibiuuth 7-1 \4.i 2!) 0

TA 3 L Z CI. Ca-ractcristjcs of the cross section of absorption of /-quanta by nuciei.

Ele- ment £

rti

in mev V

£ ’ £

r..>

in barns

! r. = >’

| > c 5

2 .e xe ve are a

e

; RjCs x

ir^x 12.V a; ““

,

r

*

n

r„x 10

3 0m cm

15. G 0.2f.3

1

7,‘J 1,70

! l.O'i 0,111 0,00715 1,20

13.3 1,80 1 l.oO 0,11“ 0.007C3 I.IK

12.*.) 0.4 IS 1 ,05 0,100 O.UIOO 1,15

14.

2

0,571 5,40 j 1.23 0.2,4 0.01S2 1 22

ilium 14.0 0,048 1,28 0.266 0 .'200 1.23

srr.uta 13,<J 0,537 ”

1 3 -“

1 1,04 0.220 0,0173 1 . Hi

Energy (MeV)

Figure 2 : Photoneutron cross section

o , computed from the yield curve by

the "photon difference method."

"x" -- cross section measured in Ref.

10 [E.A. Whalin and A.O. Hanson,

Phys. Rev. Qg, 324 ( 1953) ] for

tantalum. For Cd, I, Ta, Au, T1 and

Bi, curves are presented for the c cross section of y-quanta, computed

from the statistical theory of

nuclei. "•" - cross sections obtained in Ref. 9 [Nathans and Halpern,

Phys. Rev. 21, 437 (1954)].

x X

PHOTONUCLEAR DATA SHEET 49

U.S. DEPARTMENT OF COMMERCE

NATIONAL tUREAU OP STANDARD:
k.„ r.H. Hn < ley. Wo E. Stepnens, E.J. Winhold

Pnys. nev„ 10^4- , 178 (1956)

Elem. Sym.

Ta 181 73

M<-th Li (p,Y) source, 480 kev protons. BF^ counters

Ref. No.56 Ha 1 EGF

Reaction E or A E s

erd E J " Notes

* 181/ Jv Ta (Y,xr.)

form NBS-418 USCOMM-OC 1SSB«-PS3

Average Li cross section is 355 mb; cross section with detector response

weighted for low energy neutrons^lga

Assumed ratio 17«6/l4.8 = 1.7.

Calculated cross section at lA.8 and

17.6 MeV assuming cross section

curves measured at Pennsylvania and

Saskatchewan (refer Table I).

Table I. Cross sections for nhotoneutron emission induced by the lithium cramma rays. The results are compared with previous data

Betatron data

Pennsylvania Saskatchewan

*Fe

rCo

.Si .Cu

..Zn <'8

MSn „Tl

.,vv -v\u. -H*

«rb

w Bi

section data Data of -H • <MI 1 Counter Mcfjnniel — — Group A Group 3 ft .1! • <r*, h 9X7 t * «»’• FIT . <ri: ^

38 mb 33 mb 37 mb 60* mb 0.5 23 mb 47 mi

49 49 47 60* mb 0.5 95' 0.5 30 60

2S 25 23 40« 0.7 22 32

64 61 5 5 ±12 95' 0.6 45 0

48 45 48 90 r 0.7 38 54

175 170 135 240' 1.0 175 175 200 190 180 420 ‘ 550'

320'

240' 355 360 260 350d 1.3 420* 2.3 365 355 325

330 295 315c 1.7 480' 1.9 460 255 365 340 290 310 295 250 320* 1.6 440' 2.S 4001 500'

250'

200' 305 280 250 270d 2.6 550' 2.4 490 195

• fee reference 3.

• Average of 14.3- and 17.6-\lev cross sections weighted with relative intensities of the lithium gamma-ray lines.

• See reference 24.

t r. Nathans. Ph.D. thesis. University of Pennsylvania. 1934 (unpublished).

• J. Halpern (private communication).

1 See reference 23.

1 See reference J2. separate cross sections at 14.8 and 17.6 Mev as obtained from Group A data and 14.8/17.6 betatron cross-section ratios.

• Obtained using 14.8/17.6 eross-jeetion ratio from Pennsylvania betatron data.

• Obtained using 14.8/17.6 cross-section ratio from Saskatchewan betatron data.

U.S. DEPARTMENT OF COMMERCE

N/ .'IONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 50
form NBS-418 ( 8* 1 * 43 ) USCOMM-OC 18834-P63 PHOTONUCLEAR DATA SHEET 51

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. P. Erdos, P. Scherrer, P. Stoll

Helva. Phys. Acta £0, 639 (1957)

Elem. Sytn.

Ta 181

Ref. No. 57 Er 1

73

Method £5

Betatron; a yield; radioactivity; Cu (y, n) reaction.

EGF

Reaction E or A E <7d E J ” Notes

_ 181, \ Ta (y,a) Bremss.

32

0.lJ+5±0.03 MeV-ml 1 Based on yield measurement.

form NBS-418

(8-1-83) USCOMM-OC 18888-P83

u.s. DEPARTMENT of commerce

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 52
(8-1-831 NATIONAL BUREAU OF STANPAROS

USCOMM-OC 18S38-P83 PHOTOHUCLEAR DATA SHEET 53
PHOTONUCLEAR DATA SHEET 54
R«. J.H. Carver, W. Turchinetz

Proc. Phys. Soc. Jl, 6 13 (1958)

Elem. Sym.

Ta 181 73

Ref. No. 58 Ca 1

Method Canberra electron synchrotron; neutron yield; radioactivity

EH

Reaction E or AE

S'

dE

J

= 73±3$

p

l j

= 3. Oil. 2^

31

J

= 24±3*

J

Notes

Ta

l3l

( 7,n)

_ 181/ , \ Ta (Y,3n)

_ 181, Ta (Y,2n)

Bremss.

7-32

E . =7-6 MeV

tn

E . = 22 MeV

th

E = 14- MeV

th

fa(tot) dE = 3.3±1.2 MeVFicrure 1. Yield curve and derived cross section for the reaction IMTa(y, 3nj l7HTa. The

circles and triangles refer to the normalized 9-5 min and 150 nun observations.

Kt| | | I ' “I ' ' ' ''

]

Figure 2. Cnnw section# a, <7 t and <r„ tor the reactions ""Ta(y, nl. (y. 2n) and ly, Jm and

rhe total cross section m <i\ <r.\- 1 — J — -

U.S. DEPARTMENT O* COMMERCE

NATIONAL BUREAU Of STANDARDS form NBS-418

(8*1*6 3) USCOMM-OC 18856-P63 PHOTONUCLEAR DATA SHEET 55
>.G. Chidley, L. Katz, S. Kowalski

Jan. J. Phys. 36, k07 (1958)

EL EM. SYM.

Ta 181 75

Betacron

REF. NO.

58 Ch 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPf RANGE TYPE RANGE

G , N RLY THR C THR BF3-I 4PI

See 58 Ka 1 for cross sections

TABLE I Measured protoneutron thresholds

THRESHOLD

Measured Other Q values. Reaction Q value, Mcv. Mev. Method Reference

Tal *KY, n)Tal8 » 7. G6 ±0. 05

7.7 ±0.2 Threshold McElhinney el al. (1949) 8.0 Threshold Johns et al. (1050) 7.55 3=0.20 Threshold Sher et al. ( 1051)

S-418

4.041 jC 2601Q-P64 S..EET 56

u.s. oepartmentcf c o • •

. .: NATIONAL flUREAuC-- ; „

• PHOTONUCLE
Ret. G. Cortini, C. Milone, A. Rubbino, F. Ferrero

Nuovo Cimento 85 (1958)

Elem. Sym.

Ta 181 73

Method Ref. No. Emulsions; Betatron; ionization chamber

58 Co 1 EH

Reaction E or AE

Bremss,

20

30

crd E J " Notes

Ta (y,n)

E

^ =7*6 MeV; 90 spectrum.

In figure 3 , the four theoretical

curves (i-IV) are normalized to the

experimental yield.

Level density:

Curve I: <jo(E r

) = C exp [2 •/aER

]

;

2

or = tt A

160

Curve II: See Weisskopf and Ewing:

Phys. Rev. j6 , 1550 (^9 )

Curve III:: See Price: Phys. Rev.

21, 1279 ( 195*0

Curve IV: See Schiff: Phys. Rev.

21, 1311 (19^8)

Kitr. Kiiitita -|mmm rurn 01 tin* piioriiiifinroiis iruin I’.i. K n p«*riin«*nt'il lururi*.** I Or

• hi* flit'll till in* mull i|iiii*«l I *». Tin* rurvi*.** I. II. Ill unit I V .nv r lit* •*\ .1 |»<ir:i l imi -|M*iir.» ;ilfiil. Hnl iiiuIit ilillrmii urns fur tin* h*vi*l i|i*ii>irv

!'*»•«• VI ).

rORM HBS-418 U.S. DEPARTMEni wr COMMERCE

1 8- 1 -3 3 ) NATION \JL BUREAU OF STANDARDS

USCOMM-OC 18936-P63 PHOTONUCLEAR DATA SHEET 57
G. Fuller, B. Petree, M.S.

ys. Rev. 112. 55^ (1958)

Betatron; ion chamber

Weiss

EL EM. SYM.

Ta 181 73

REF. NO.

58 Fu 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABY 7-40 c 7-4o BFJ-I 4PI

Table I. Target properties and results.

ScdE*

Element Form used Weight

Warns barns NZ/A

Mev-b P*m *a Mev

Sn Sn 4.81 0.30 0.064 5.0

I i 8.55 0.36 0.085 6.0 La La 10.43 0.34 0.063 5.2 Ce Ce 4.99 0.45 0.080 4.5 Sm Sm:Oi 2.90 0.26 0.073 8.6 Tb Tb.Or 3.04 0.39 0.087 8 7 Ho

Er HojOi 1.87 5.41 0.41 0.50 0.079

0.100

7.5 8„£ Yb VbiOs 5.57 0.50 0.090 7.6 Ta Ta 8.41 0.49 0.077 60 Au Au 3.16 0.68 0.085 4.2 Pb Pb 8.05 0.75 0.081 3.8

«t£

IC‘ 6- Mean ^rgy and width of giant resonances. “£«” and

1 u a

,r

,e the mean energy tor photon absorption and the full width

at Half maximum of the giant resonance obtained from dashed

tustograms as in Fig. 5. No attempt was made to fit data with

resonance curves to obtain these parameters.

Is the maximum value and "P* the full width at n)/7 rJ smn. Data were

production cross section corrected for m*l?‘pleneuwon emit! not fitted with resonance lines to determine these vSSol

neutron ?^ve"U2»rth

P

r

re^old.‘0n “°“ COrrected tor

Table II. Energies of resonances in deformed nuclei.*

Nucleus Em Mev

(?• barns Method

£« Mev

E> Mev EmT

Mev Em*

Mev

»»Tb'P 14.7 6.9* CE 11.9 16.2 10.8 19.5 itHo1- 14.5 7.8* CE 11.5 16.0 11-0 18.5 iiEr>« 14.5 21* SC 8.5 17.5 11.5 20.0 «iEr“* 14.5 7.8* CE 11.6 15.9 11.5 20.0 >iTa‘“ 14.1 12.6* SC 10.5 15.9 11J 17.3

14.1 6.8* CE 11.9 15.2 11.3 17 J

..Au1 " 13.6 3.75* SC 12.5 14.1 11.8 16.2

• CE—Coulomb .xeitatlom SC—.pectrowtople 1 But'. B,/,*—energies at whleh giant resonance drops to half Its maximum value.

* Adler. Bohr. Huus. Moitelson. and Winther. Revs. Modern Phys. 28. M.

9L^Pool and D. N. Kundu. Chart of Atomic Nuclei (Longs College Book Company, Columbus. 1955).

s4 N3S-418

. '. 14. 441

)KV »-f * c *’AOlO r»S4)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU O ^ ^ ANOAmOS PHOTOHUCLEAR DATA SHEET 58
E.G Fuller, M.S. Weiss

Phys. R

e v. U2, 560 (1958)

EL EM. SYM.

Ta 181 73

METHOD

Betatron; ion chamber

REF. NO. 58 Fu 2 NVB

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,XN ABX 8-23 C THR-25 BF3-I 4-PI

CF DAN^S THEORY

Table I. Resonance parameters.

Tb‘° Ta‘“ Au‘” 3u (Mev) ’5.2 14.0 14.2 £. (Mev) 12.5 12.45 13.15

v.’ (Mb) 258 308 255

r. (Mev) 2.4 13 2.9 E, (Mev) 16.3 15.45 13.90 n* (Mb) 310 348 365

r. (Mev) 4.0 4.4 4.0

Table IL Integral cross sections.

Tb‘“ Ta‘“ Au“' A f?*JE/0.Q6NZ 1.27 1.30 1.29 f<r+iE/fa.dE 2.00 2.16 1.97 A ft' (#. +*»W£/0.06iVZ 1.27 1.35 1.22

Table III. Intrinsic quadrupole moments, in bams.

Tb>« Ti'“ Aul,T

1.50±0.05 1.25=0.01 1.06=0.03 Qo(£o-1.09X10-'1 cm) 5.6 =0.6 5.7 =0.3 1.6 =0.6

Qt (Coulomb excitation) 6 9* 6.8* 2.6»

• Adler. Bohr. Huuf. Mottclson, and Winter. Revs. Modern Phys. 28. 432 (1956).

* P. H. Stelson and F. 1C McGowan. Phys. Rev. 99, 112 (19S5).

fu0SS section “ or tantalum. See Fig 5 tor description. Circles, triangles, and alternate dots represent four independent determinations oi the cross section trom the original activation curve. The correction for neutron multiplicity required to bring the experimental points down to the smooth curve in the region from 14 to 16 Mev would probably be within the limits of errors on the ^f

C^.St^3n15

1Vfn

i by Car

3

er a7

Q Turciune

i z ( r“c -' ence The open squares and closed squares correspond to the limiting positions

of the experimental points based on curves A and B given in Fig. 4. fo*m NBS-418

„ (REV. 7-14-64) USCOMM.OC 260 1 0- P64 PHOTONUCLEAR DATASHEET 59

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
REF. E.G. Fuller, E. Hayward

Phys. Rev. Letters _1, 465 (1958)

METHOD

Betatron

ELEM. SYM. A

Ta 181

REF. NO.58 Fu 3

75

NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,G ABX 5-27 c 5-27 NAI-D 120

CF DAN^S THEORY

FIG. 1. The differential elastic scattering cross

section for tantalum at 120* as a function of photon

energy. The smooth curves are calculated using

the dispersion relation and the resonance parameters

given in reference 1 with the peak cross sections re- duced by 10%. The solid curve is the result obtained assuming a tensor electric dipole polarizablity (Eq.

(5)1; whereas the dashed curve results from assuming

a scalar polarizability ( Eq. (6)1

.

form NBS-418

(REV. 7*14-04) USCOMM-OC 20010-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 60
L. Katz, G.B. Chidley

tfuclear Reactions at Low and Medium Energies (Academy of Science,

USSR: 1958) 371

Ta 181 73

mcthoo Betatron; neutron cross section; BF^ counters; ion chamber monitor REF. NO. 58 Ka 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 9-22 C 9-22 BF3-I 14-PI

T a o .1 u n a 2 IJopoiu ucnycKamiA pomoneumpoHOS

IlaoTon 0H. Mm Brn. Mb HaoToa .Bn. Mm Bm. Mm

V*1 . 11.16 20.5 ! LUO 8.81 16.1 Mn» 10.14 19.2 pr m 9.46 17.6 Co-9 10.44 1S.6 Tb 1 *® S.16 14.S A

s

; * 10.24 1S.1 Ho1 ** S.10 14,6 yoo 11.82 20.7 Tmic® S.00 14,7 .\bM 3.86 17.1 Lu175 7.77 14.2 Rh1 ®3 9.46 16.

S

Ta1 *3 7,66 13.8

J

127 9.14 16.2

J Au 1 ®7 16,5 ;j Bi3®®

7,96 13.3 Cs133 9.11 7.43 14.5

THRESHOLDS

«e npiiocacHU, nocKO.ibKy ohm npcBLunaiOT 22 Mm bo bcox c.iy^aHX, upoxie

30^ora, :uifl Koroporo B^ = 2{ Mm. CBofiCTua cc'ieiimi cc(t) cbcachbi

b Tao.i. Ji. — — _

If »o Ton

VSi Mn*

Co*® As’* Y89 Mb”

Rh1 ®3

J

177 CS‘M

La 139 pr ui Tb 13® Ho14* TmIK Lu'W

Ta 1 *3 Au1 ®7 Bi7®*

Mm *

n

(£7

). tfapn T, Mm

18,4 0.062 5.2 20.2 0.060 7.0 18,3 0,068 6.3 16.4 0.090 9.5

17.1 0,172 5.2 18.0 0.155 7.5 17,5 0.1 eo 9.<, 15,2 0.273 6.8 16.5 0.238 7.7 15.5 0.325 3.8 15,0 0.320 4.9 15,6 0.274 9.8 13,5 0.305 8.9 16,4 0.250 8.4 16.0 0.225 8.4 14.5 0,380 8.5

13,8 0.475 4.7 13,2 0.455 5.9

T a 6 n a a a t

rw ,

• 6a pH

r(22). 10* mflmpoH/100 p • MCAb

0.33 1,62 0.39 2.01 0.44 2.3C 0.74 4.25 0.93 5,33

1.17 6, SC

1.40 8.28

1.76 11,9 1.59 10,7 1.55 11,2

1.93 13.1 2.49 18,1 2,52 18,7

1.91 14,9 1.90 23,0

3.15 22,0

3.04 22,6

2,89 23,2

a — Bbrxon (poTOHeftTpoHon nnn Ta;tf— o„ (R.) — cenenne HcnycKamm pOTOHeiiTpoiiOB. BuqucJieHHoe 113 namihix , npiiBenemiux h* pile. 15, a. — ceqeime pcaitmin

( 7 , «), no/iyqeHHoe b paOcn-e [ 20 ] (HopMiipoBKa peayjib- TaxoB npou3 Bo^biiaR); a'c(l) ~ ceseime norjiomciiHR

7-KBaHTOB. BUBHc.icHHoe no (fopMyne (10) ; ac ( 7 ) —

ta me Bejinnina, Bbi<mcJieHHaH no ipop.MyRe (6)

-cru N3S-418

4 - mi

• PC IB OIO-l>«

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR E AU OF STIN'jISCi

PHOTCNUCLEAR DATA SHEET 61
Ref. b.Mo Spicer, H.H. Thies, J.E. Baglin, F.R. Allum

Australian J. Phys. _11, 298 (1958)

Elem. Sym.

Ta 181 75

Ref. No.58 Sp 1

Method MeV e i ectron synchrotron; neutron counters, 25 r Victoreen

monitor EH

Reaction E or AE ad E J * Notes

_ 181 / \ Ta ( 7, n) Bremss.

8-18

I

Fi K. 4. —The cross section fur nuclear absorption of v-ruys in tantalum. Tho full circles were calculated using curvo I of Figure 3, while tho open circles wore the result of using curvo II.

L'.se of curve III led to tho dotted cross section.

Fig. 3.—The fit of two Breit-Wignor shape resonance curves to the cross section calculated using curve III of Figure 3. Parameters of Breit-Wignor fit to observed n: = 12*6 McV, a, m =300 mbam, r,=2MeV: Et ~ 13* 3*MeV, a-, m =430 mbam, r, = 4 MeV.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-1-63) USCOMM-DC 188S6-P63 PHOTONUCLEAR DATA SHEET 62
R«- L.B. Aull, G.C. Reinhardt, W.D. Whitehead

Nuclear Phys. 15, 292 (1959)

Elem. Sym.

Ta 181 73

Ref. No. 59 Au 1

Method Si (n,p) radioactivity detector EGF /EH

Reaction

Ta

lfcl (7,n:;

E or ;}E

Bremss.

18-65

s

crd E

f

c: ~ 800 MeV-mb

J " Notes

Yield measured relative to Cu

C ^(7, n)

E 2 5 MeV.

n

TA3LZ I

Ratio of fast neutron integrated cross section to total neutron integrated cross section

r ^ Z. Tantalum •/. fo^t n) smoothed integrated cross section and cross sect.on. f,;e points ana the »muotU curve represent the smoothed integrated last neutron cross section (see text) as denned jy

Jo G y. 0) wnere c y i x:c ;» the cross section tor pautoproduetton ot neutrons with energies above the S.-*n , threshold and £ ;» the mciuent ^anur.a rav e:ter::y. ."..e error* indicate.. wore

obtained d\* propagating the counting -ir.cci tainttes 111 t..c . .c.«l data tr.rouiM t::e integral eros* section matrix. The histogram represents the tirst inferences ot the integrated cross action curve.

24 McV 30 MeV 00 MeV

Tantalum 10.3 i2.-l % *) Gold . 10.0 = 2.7 %»)

7.3-1. 7 %

b

) 10.0 = 2.3 a

) 17.4-4.3 c

j

») Compared to {•/. n) cross section of Fuller and Weiss 17 };

a

) Compared to (y. xn) oi Tcrwiiligcr and Jones 18

) ;

c

) Compared to (y, n) of Edwards and McMillan (data taltcn at *0 Me\ )

l ®).

Ref l€

Ref 17

Ref 15;

Fuller & Weiss

560 (1958)

Phys. Rev. 112 ,

Jones & Terwil linger Phys. Rev.

21, 699 (1953)

Edwards 3c MacMillan - Phys. Rev.

82, 577 (1952)

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS

FO RM NBS-418

( 8 - 1 - 63 ) U SC Omm-OC 18890-P 03 PHOTONUCLEAR DATA SHEET 63
W. C. Barber and W. D. George

Phy«. Rev. U6, 1551 (1959)

EL EM. SYM. A

Ta 181 73

METHOD REF. NO. 59 Ba 3 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE . RANGE

E,N ABY THR - 36 D 10-36 BF3-I 4PI

20* ;o' 4-

Tic. 7. Yield of neutrons per incident electron as a function of

initial electron energy fur the Ta target i radiation-.er.gta thick.

T.tlg.a f. Thicknesses of the targets used in the experiment.

* with tl.e exception of heavy water, .... targets contained isotopes

in their naturally-occurring proportions.

T:.;ok::c«

S c:..-; Ti.ick:: -so (rut -n Icr.^iio/ ileavv water o.oos

'>L- 0.5s9 0.f.6s67

> r 3s.61 0..VN AM 24. !

6

1.00 r.t-A 1.372 0.1 1)5

t V. 13.26 1.64

i *i.-

.

•

2.0S

;r 36. .Mi *V U> Cu-LY 53.13 T. 1 1 T;i-I 6.21 ().‘JS d.,-1 5. NS l.. :

r 11.42 l.'n T ,-ili 17.30 2.6.S i'h-lY 22.S9 3.04

I'h-YC 34.42 5.63

i;-r 6.17 1.14 r-r r 12.42 2.30 c-nr 1 S.61 .**.46 Concrete 2S.5 1.19

,C7> • ,0'-

50

ONE radiation length

TARGETS £,04.3 MEV

• experimental points

• CALCULATES points

tc 20

i

•

\ —

:

: \

\ ;

\

!

; NORMALIZATION-

-

POINT

- »

j

i

i” 1

i ’

! : M;. 20 »0 60 ATOMIC NUM6ES

60

Z

t. Experimental and expected yields of .dectrun for 1-radialion-lengih targets at 34.3

of atomic number /.. The experintentai ;

1 :>/ dividing the measured yields from the targ actual t..rget tmcxncjiea ..atcu tr. ia'ua

rc ciitCUtaicu :ro:n c.\[jrciaior. ,c>y.

per

I. Tite .

form NBS-418

-i (REV. 7-t 4-S4I USC OMM-OC Z801&-PS4 PHOTONUCLEAR DATA SHEET 64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. J.H. Carver, W. Turchinetz

Proc. Phys. Soc. 69 (1959)

Elem. Sym.

Ta 181 73

Ref. No.59 Ca 3

Method 33 MeV synchrotron; radioactivity; Nal spectrometer; r chamber

EH

Reaction E or AE S"

dE J * Notes

_ 181/ x Ta (-Y,n) Bremss,

8-33 13.5 5.3 MeV 2. 4- ±0.8 MeV-b

5

i

-I

Fitfure 1.

a

•

* .#•**

J

:

1 “

} 3 7 i ^ 7 t 7 i 5 To i^erfy |MCV> Activation cun'e for ‘"'Tafy.ni leadinu to che 815 hr level of ‘““Ta.

Statistical errors jre >maller than experimental points. —

1

Figure 3. A, derived cross section tor IMTa(y,n), </, ; B, total cross section, ‘ r i“ ,7 :; where rrt has been taken from the data of Carver and Turchinetz (1958), C, <J\ + 2oj.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(9-1-63) U3COMM-OC 19939-P63 PH0T0NUCLEAR DATA SHEET 65
U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS

form NBS-418

(8-1-63) USCOMM-OC t 88S6-R63 PHOTONUCLEAR DATA SHEET 66
REF. £L£M. S T M

.

W. Sebaoun and H. Compt. Rend. 248 .

METHOO

Gauvin

791 (1959) Ta 181 73

REF. NO.

59 Se 2 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,P ABX 15,13 D 15,18 EMUI

4PI

14.8 and 17.6 MeV photons

Average 0 = 1 .6 ± 1 .2 x 10 20crac

.

form HBS-418

(R EV . 7-1 4-54) use OMM-DC 26010-P04 PHOTONUCLEAR DATA SHEET 67

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Cross sections for Ta derived from the yield curves of fig. 1. The relative magnitudes of the

cross section for the different reactionL'i". 1. Yield of Ta radioactivities resulting from tiie real brcmsstrahlung ot electron.^ «i a tunction of tiie electron energy. ,1 1 I form HBS-418

(8-1-63) USCOMM-DC 18856-P63

Ta ° 12.1 HOURS) 1 — €• 2^

I 0.5 h

i 0 L

Fig- 5. Ratio of the yields of Ta 180 from the elec- trodisintegration of Ta 181 to those from the photodismtegrauon as a function of electron energy. The ordinate A'e

is the radiation length equivalent

of the electrodisintegration. The circles with

standard errors indicated are the results of the experiment. The crosses are from the experiment

of Brown and Wilson 3

). The theoretical ratios

| for a point nucleus arc shown as solid curs es. The

dashed curves indicate an approximate correction • for the nuclear size.

26 28 30 32 34 36 38 40 42 ELECTRON ENERGY 1M.V)

Fig. 6. The radiation length equivalent

of the electrodisintegration yields of the two isomers of Ta 178 produced from Ta 381 as a function of electron energy. The circles with standard errors indi- cated are the results of the experiment. The theoretical values of A'e for a point nucleus are shown as solid curves. The

dashed curves indicate an approximate

correction for the nuclear size. Phvs, Rev. M+3 (195^)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 68
Ret. W.C. Barber, V.J. Vanhuyse

Nuclear Phys. 1 6, jQl (i960)

Elem. Sym.

Ta

A

181

z

73

Methoa Stanford Mark II accelerator; virtual and real photon spectrum from

electrons; magnetic spectrum; KI scintillator crystals.

Ref Vo. 60 Ba 5 JHH

Reaction E or ^ E

0 r V

je J * Notes

Ta

l6l

(7,p) E _= ^ 40

e ho

r = 60±25^i MeVmb

' 0

|adE from calculated real and virtual

photon spectrum.

4.0 » 10

3.5:

3.0-

t: 2 . 5 - 1!> “I z.oh

To

•a

-*2 v-v

5 C5*

i *-l

' — 1—* h

l.Of

0.5h

oi — — tt«—

, 7 9 II '3 iS IT 19 21 23

=D ><ev)

l'ii» ii. Ener-y ilistrilmtion of protons from T:i at IMS*.

. 2 • *0' TO

£0. *0

f I M -

,

1

•

5

* l

1 "9 * 9 '• J 5 1 7 9 21 23

o so 5o 55 55 so so

t ilab oegheesi

Fl1, 12. Angular di5tr.but.on of prot.ms irom Ta havin' energies n.-ar the jccond maxum.in m :he

energy dwtnbution. The curve is .. ;*l«t of f2.T2 -l.M»cosO 0 " 1 * m

3 0 .0 V “

I 05* so «ASIATC»

* 06 * : 6 •

‘3 '

F.« 7 Energy distribution of protons from Ta at •*» The scales of .ibso^ac on thu ticurc and

f 1? * arc not directly comparau.e because m the Mr measurements an additional radiator of

3.0$ x 10"* radiation iengin was in the primarv ocam upstream iron, the target.

J 6 a

I'.g !•: pAiinimn t!..* h.

' 0 *-

31-

13 VO 32 i-* « 2® 40

.i • i I'.t .i- a i r:ic:.< ii >u pr;r.*.ar

9 'iCS*

I .c 39 - 2 63 Mev

wiT-our oflCisrcR * ( th aa: mor

n

.. I

* _ie :£u»cesi

r, 3 II Angular • ;t-:r:3 >»st : n *»i pmtnns lr*»m r.i «hi*:h !.sv

• n ;ne cncftfv l.»:r. Snition. l*h*.* urve ;• a p

-

* t •« - '3 "

lu-Ji

.•n-s n» *.r :hf f.r»t maximum

• 21 -i:i* 0 -""T *0 'iii'O*

iS

I

. - 09* —•- mithou" »AG.arc» e# -4.orM#v

• «rr* RAOUtfwft = 3 99-*0 9 M«VI

li 13 17 19 « nr

-i •-**/>

HI Differential ern-s -ccli,,n for protlucine the hiitie-r-oncrcs stroup of preums lc m

riie m.IiiI histmirnm wa* -lens ••<! from .1 pilot, m->htlercii<:c unats he. Hi. The ,l.,sne,l

ularlv <lvnvdl .torn .turn (nnc , vlt: ...Un w.th ,n aurf.t».t.al rmh.u,,

.,1 3 I- Hi * rnUiatfn l-ncth ,.i l.i in the primary electr.m beam upstream irom the ta.- 1

Z-rcc ,.l relMh.l.ti .-I results van he font lie- .ecrevmeat ..l the Civ,, hhU«»

ZJ “7 li ? n 25 2? 2» 5 !5 « 12 31”

F,s ’0 D, llercnt.il cross section lor proUucnc the lower enerev croup ol protons from Ta.

£Te ihZTM were .lerteesl be photon-Ui.lerencc unafv.es ol two cxc.tatum unctions Mshown l taken with and w.thout the a.hhttnna. Ta ra, hater -13 1- lu- »•»«•» ;»

the prvmar, eh-etron beam Mthoueh the proton coerce croup- were not extuttl .the >ame m t.

two case- the- are close .moucn that :.c ero-s sect.oos are .spec ted to be nearI v the same. FORM NB! ... (8-1-931 USCOMM-OC 18998-P93

U.S. DEPARTMENT OF COMM.,.. - NATIONAL BUREAU OP c “\NOARDS

PH0T0NUCLEAR DATA SHEET 69
Ref. J.H. Carver, R.B. Taylor, W.E. Turchinetz

Australian J. Phys. 1%, 6 17 (i960)

Elem. Sym.

Ta l8l 73

Ref. No.60 Ca 2

Method Electron synchrotron; radioactivity

EH

Reaction E or A E S"

dE J

it Notes

Ta

l 8 l (Y,p) Bremss.

P-5 ~ 32

28

32

j

= 10±2 MeV-mb

E , = 6.7 MeV

th

CT = 1.0 mb, max

Fig. 3. (a) The yield curve and (6) the derived cross section

for the mTa(Y.p)l80m Hf reaction. FORM NBS-418 U.S. DEPARTMENT OF COMMERCE

(8-1-03) NATIONAL BUREAU OF STANDARDS

USCOMM-DC 18S36-P03 PH0T0NUCLEAR DATA SHEET 70
v.p

Zhu

Sov

..i.-tnod

- Chiziiov

r. Eksp. i Teoret. Fiz. 809 (i960 ) -at Phys. JETP 11, 587 (i960)

Elem. Sym. A

Ta

Ref. No. 90 MeV Bremsstrahlung; scintillator counter telescope

60 Ch 1

181 73

JHH

Reaction E or AE E

Ta

l8l

(y,p)

Ta

l8l

(7,d)

Ta

18l

(Y,t)

s

ad E J " Notes Energy Range of particles detected:

E

d

- 15.5-30 MeV

E

p

- 15.5-30 MeV

E - 17-30 MeV

Ratios:

a(Y,d)/a(T, P ) } at g . #

<*(Y,t)/<?(Y,d)

TABLE I

Element 100Nt IN d Element 100Nt /Nd Element 100N, iNd Element ioo/v

f /.v d

Li* 30*3 B 39=8 Ni 10=4 In 5 = 2.5

Li 7 22.5=2.5 j Si 10=4 Co 2.5=2 Ta 10 = 4 Be 13=2.6 | S 8 = 4 Cu 2.2-2 Au 3=3

to rm NBS-418 .scoMM-ac 1 PHOTONUCLEAR DATA SHEET 71

U4. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARD;
K.N. Geller, J. Halpern, E.G. Muirhead

Phys. Rev. 118, 1302 (i960)

ELEM. SYM.

Ta 181 73

METHOD

Betatron; neutron threshold; ion chamber

REF. NO. 60 Ge 3 NVB

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,N Njfe THR C THR ACT1

kvi

THRESHOLD

Table I. Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. Ail energies arc expressed in the ccntcr-of-masi system in Mev„

Itrnelimi No. runs

Tal “(V.»)Tal " 5 Tals, (7,»)Taiao 2

(to 8.1-hr state)

Fic. 8. Photoneutron yield curves for Ta‘u measured by direct

neutron detection and induced radioactivity. The difference in

the observed thresholds indicates the 8.1-hr isomer to be 212 kev

above the naturally occurring Ta180 ground state.

Present results Other results Method Reference

7.640±0.025 7.66 ±0.05 threshold f 7.852±0.026

form NBS-418

(REV. 7-14-04) USC OMM-OC 200 1 0- PC

4

PHOTONUCLEAR DATA SHEET 72

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STAUpAROS
R.G. Eaker, K.G. McNeill

Can. J. Phys. 3%, 1158(1961)

METHOD betatron; fast neutron yield;

threshold detectors; ion chamber

angular distribution; A1 and Si

Ta

REF. NO. 61 Ba 2

181 73

! NV3

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE*

G,XN ABY THR-22 c 22 THR-I 3 -+ DST

G,XN ABY THR-22 C 22 THR-I 5 -+ DST

In Tables 2 and 4:

a = average cross section of detector

weighted with neutron spectrum

* "5.”+" is the detector

Aluminum and "

5 -+" of

range of

Silicon.

$ = neutrons/lOO roentgen/mole

00 W(0) = a

Q y

[1 + Pq

(cos 0)]

n=l

TABLE II Normalized yields for aluminum detectors

Al(n,y) reaction Al(n,p) reactions

Element 30* 90* 150* a. 30* 60’ 90* G. «

1

(d*)’X10»

Bismuth 399 5G7±130 G20 541 ±85 3632 5139±290 3168 43GG±185 0.06 ±0.06 -0.35 ±0.1 i7.76 478 423 d; 130 G41 484 ±85 2562 5353 ±290 2955 4144±185 -0.05 ±0.06 -0.53 ±0.1 16. S7 Lead 426 312±120 725 429±77 3123 5754 ±260 3154 4591±1G6 -0.004 ±0.05 —0.51 ±0.07 1S.6S Tantalum 378 3G7±190 GSS 441 ±122 2757 3024 ±425 2088 2757 ±275 0. 14±0. J4 —0. 19±0. 17 11.22 Lanthanum 208 222 ±110 330 243 ±70 2139 3371 ±250 1891 2768±1G0 0.05 ±0.07 -0.43 ±0.10 11.27

Arsenic 77 100 ±50 108 97 ±32 788 937 ±115 764 8C5±74 0.02±0. 11 —0. 1G±0. 14 3.52 Copper 13 65 ±30 70 55±20 710 748 ±70 569 700 ±45 0.11 ±0 . 08 —0. 14±0. 11 2.85

- 4.07 X 10*«a fuillibern-neutron. TABLE IV

11 III IV V VI VII Element a* «t at (e*)X 10»* *«a(22Mcv)X10» faii/'J’loU! Vanadium 245 (1 ±0.0G) 0.01±0.08 -0.00±0.10 6.05 0.21 0.12 Ch.omium 104 ( 1 ±0.03) 0.04 ±0.04 —0.05±0.05 4.05 0.17 0.10 Manganese 308(1 ±0.02) 0.07 ±0.03 —0.09±0.04- 7.61 0.25 0.12

T r: .. 200 ( 1 ±0 . 03

)

0.05±0.04 —0.17 ±0.05 4.94 0.18 0.11

*

: !t 390(1±0.02) 0.08 ±0.03 -0.22 ±0.04 9.63 0.26 0.15

l; t- 145(1±0.05) 0.07±0.07 -0.23 ±0.09 3.58 0.12 0.12

.. . 347 ( 1 ±0.02) 0.05 ±0.03 -0.29 ±0.04 8.57 0.30 0.12

.C 4S2 (1 ±0.03) 0.11±0.0-1 —0.24±0.05 11.91 0.33 0.15

. \J '.iurti G3S(1 ±0.05) 0. 13 ±0.06 —0. 14±0.08 15.76

l "aTtiam 409(1 ±0.05) 0. 10 ±0.06 —0. 17 ±0.08 10.10

. : .. i..(t> 290 ( 1 ±0. 10) 0.08±0. 12 —0. 12±0. 15 7.16

Silver 590(1 ±0.04) 0:10±0.06 -0.22 ±0.08 14.57 0.87 0.07

LaUiC.lL C.. 905(1±0 02) 0,02 ±0.02 —0.26±0.03 22.35

iodine 1 133 ( 1 ±0.0:3) 0.04 ±0.04 —0.29±0.05 27.99 1.42 0.08 Barium 1048(1 ±0.04) 0. 10±0.06 —0.38±0.08 25.89 Lirmnai... 1595(1 ±0.02) 0 . 02 ±0 . 03 -0.42 ±0.04 39.40 1.04 0.15 C6.-:-.n 131G(1±0.05) 0 . 05 ±0 . 00 —0.39±0.08 32.50

Dysorosm./. 1G52(1±0.0S) 0.04±0. 10 —0.34±0. 13 40.80

Tar.zaluui 1558(1 ±0.02) 0.04 ±0.03 —0. 22±0.04 38.48 2.50 0.06 Tungsten 1365 (1 ±0.02) -0.07 ±0.03 —0.24±0.04 33.71 Mercury 1345(1 ±0.02) 0.04±0.03 -0.31 ±0.04 33.22 Lead 2274 ( 1 ±0.01

)

0.02 ±0.02 -0.42 ±0.03 50.17 2.72 0.08

Bismuth. 2162(1±0.02) 0.05 ±0.03 —0.45±0.04 53.40 3.36 0.06 Thorium 3031 (l ±0.04) 0.0G±0.05 -0.32 ±0.07 74.87 Uranium 4630 (1 ±0.02) 0.05 ±0.03 —0. 17±0.04 114.36 •(») - 2.47X1C’ *• millfbem-ncutron. Error* arc itard.ird error* due to counting Holistic* only. FOAM

• » i v . r -

1

jlCOHU.DC J*OtO-P»« PHOTONUCLEAR DATA SHPPT 73

Ua. DEPARTMENT OF COMMERC

NATIONAL. BUREAU OF ITANOAAQ
A. Bussiere de Nercy

Ann. Phys. (Paris) Third Series 6^ 1379 (1961)

ELEM. SYM. A

Ta 181 73

METHOD

61 Bu 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G ABX 10-25 C 20 NAI-D DST

K«*. »*. — Spt (inn rflkarp

iliflrrrnliptle

lip llilTuMOft

(T. t> i I V-" |mur Ip Ian. UIp.

1. a a oiiilin

« n trail

|>b*»«a__rl rn p n i n l

I (• • rrpn-

•rntPfit Ip MYlions rfli. carp* pri:- nip* par la relation <lr di«|>rr»ion

T« Bi

l’i(. > 7 . — l»i*lriliiili«n angiilairp Jp* plinlon*

•liffn»p« par Ip lanlalp W pi Ip lii.mulli (/>) (non Mr\).

form N3S-418

(R EV. 7-1 4»64) USCOMM-OC 26010-P64 PHOTONUCLEAR D 74
J. Miller, C. Schuhl, C. Tzara

J. Phys. Radium 22, 529 (1961)

METHOD

Positron annihilation; neutron cross section;

ion chamber

ELEM. SYM.

Ta 181

BF^ counter;

REF. NO. 6l Mi 1

73

NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 8-22 D 8-22 BF3-I API

cr

fonm NBS-418

(REV. 7-1 4-641 U3C OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 75

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. R.Eo Welsh, D.J. Donahue

Phys. Rev. 121, 880 (1961)

Elem. Sym.

Ta 181

Ref. No. 61 We 1

73

Method Monoergic y's from thermal n-capture; activation JHH

Reaction E or A E S'

dE J Notes

(Y,n) 7A9-

10.83

Measurement of 5^”kev K x-ray from

K-capture in Ta^®m.

Data in Table II (millibarns) ; com- pares with Fuller and Weiss in

Figure 2.

Y thresh.

= 7.6O ± 0.08 MeV

Fig. 2. Cross section vs enerqy for Tal8l (v.n)Ta180m (8.15 hr). The smooth curve represents the data of Fuller and Weiss 8 for the reaction Ta,8‘ ("T, «)Talao

.

Table II. Summary of measured cross sections.

7-ray source N Energy (Mev) Reaction\

Co

7.49

Fe

7.64

Al

7.73

Cu

7.91

Cl

8.56

Ni

8.997

Fe

9.30

Cr

9.72

Fe

10.16

N

10.83

Ta‘»‘(7 .»)Ta‘*- 0±0.05 0.5±1 4.8dbt.6 14±5 32± 16 44± IS 83±33 120±48

.\um(y n)AulM 0±2 J4±17 44±11 64±30 80±30

0±0.1 29±15 30±18 46±21 36±3l 260±93 Nb^.n/Nb7* 0.008±0.005 l.0±0.4 2.4±0.7

Ag“'(v,is)Ag,“ 0±0.1 4.4±1.5 22d= 16 23±7.5

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-1-63) USCOMM-DC 18BS8-P83 PHOTONUCLEAR DATA SHEET 75
PHOTONUCLEAR DATA SHEET 77
USCOMM'OC 18SS4-PS3 PHOTONUCLEAR DATA SHEET ?8
I -.CUE III. f..»rentx line parameters ami intrinsic qua»iruj>ole moment* lor Ta anu Ho.

Fig. 2. Partial cross-tection curve*

f-»r Ta. Curve A con*t*i* of 9iy,mi

-r Curve B consists of #17.2*1-*’ .Wry,.!*).

«• r. /:. i\ /•• 0» Ik-KTU r.t», MeV> MeVI moi (M«V) M«V> t>»

r •• pm i no i.vn :.m 10 1 5.50 #.;iior» “ :im> in.% i.mu :iv ». H.rs : io sow

Txntx IV. (uicsralcd crus* section*, level <lcn«itv parameters. .inii #_i value*.

Element mb- MeVI n nn’2 5 i* j

.i r

1 '"if-: <fd e - ir o.oo v/ t ml.MeV. McV '» MeV l.t • McV-bi MeV l> Ta,M 10 SH I.1.0.1 15 7 2 21 2.50 2.r>l

11., '« I0.9J II 17 22.0 2 17 2f>d 2..JS

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(8-1-43I USCOMM-OC 1BS39-PS3 PH0T0NUCLEAR DATA SHEET 79
EL EM. SYM. A

Ta 181 73

REF. NO.

63 La 1 NVB

M. Langevin, J.M. Loiseaux

J„ de Physique 2k, 1027 (1963)

METHOD

Betatron; photon scattering

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, G N<t>X 11-22 c 27 NAI-D DST

(22)

In figure k, W(0) = 1 + a cos 0

Tontale Holmium £rbmrn

OaO.27

form HBS-418

(REV. 7®1 4*64) USCOMMoOC 2«010-P«4 PHOTONUCLEAR DATA SHEET 80

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. C.S. Young, D.J. Donahue

Phys. Rev. 152 , 172*4 ( 1963 )

Elem. Sym.

Ta 181

kef. No. 63 Yo 1

73

Method 200 kW pool reactor; monoergic y's from (n,y) in Mn, Fe and Cu; Nal.

JHH

Reaction E or AE dE J * Notes

„ 181 / . Ta (y,y) 6 . 0- 8.

2

Measured a(elastic scattering) values

in Table II; interpolated to 7 MeV in

Table V.

Detector at 120°

Table II. Total elastic scattenne cross sections (mb).

Source. element

Energy

interval (MeV)

Source energy (MeV) Ta(l.J)

’

T arget (thickness

in cm)

Hg(J> Pb<0.6> Bit l.J>

Ti 5. 0-7.0 6.41 6.75

0.6 ± 0.4 Mn

/ 6. 0-7.

5

7.26

7.15

7.05

<0.3 0.5 ±0.J 0.9 ± 0.5 0.8 ±0.4

Fe 6. 0-7.6 7.64 7.28

0.7 ±0.4 2. 4 = 1.3 125 =20* 2.0 ±1.1 Cu 7. 6-8.

2

7.91 <0.2 <0.4 <0.2 <0.2

• Calculated using the intensity of 7.64- MeV y rays produced by neutron

capture in iron.

Table V. Cross sections at about 7 MeV (mb).

This work Ref. 2 Ref. 1* Ref. 3 Ref. 4

b Ta <0.3 2 Hg 0.5rfc0.3 3.5 Pb 0.9±0.5 15 17 60 53

Bi 0.8±0.4 17.5 19 35 17

•See also E. G. Fuller and Evans Hayward. Phys. Rev. Letters 1. 465

(1958).

® Differential cross sections at 135® were multiplied by 11.2.

1 E. G. Fuller and Evans Hayward. Phys. Rev. 101, 692 (19S6)

,

Nucl. Phys. 33, 431 (1962).

1 K. Riebal and A. K. Mann, Phys. Rev. 118, 701 (1960).

* Tsutomu Tohei, Masumi Sugatvara, Shigeki Mori, and Motohara Kimara, J. Phys. Soc. Japan 16, 1657 (1961).

* P. Axel, K. Min, N. Stein, and D. C. Sutton, Phys. Rev.

Letters 10, 299 (1963). form NBS-418

18 - 1-6 3 ) USCOMM-OC 18SS6-PS3 PH0T0NUCLEAR DATA SHEET 81

U.S. OEPffitTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. GoN. Zatsepina, V.V. Igonin, L.E. Lazareva,

Zhur. Eksp. i Teoret. Fiz. 44, 1787 (1963)

Soviet Phys. JETP _1I, 1200 TT963)

Method

A. I. Lepestkin Elem. Sym.

Ta 181

Ref. No. Synchrotron; neutron spectra, angular distribution data;

emulsions; ion chamber monitor 63 Za 1

73

JHH

Reaction E or A E

Ta

l8l

(Y,n) Bremss.

ad E J * Notes

14-

19

FIG. 9. a — energy distribution of photoneutrons from tantalum at (ht/) max = 19 MeV;

histogram 1 -N90- t N 27 o°; 2 - N 30 » + N 150 »; curve 3 — spectrum of neutrons calculated in accordance with the evaporation model; b —

summary neutron spectra for tantalum (1) and

bismuth (2) for (hi,) max = 19 MeV.

form NBS-418

(8-1-63) USC OMM® O C 105S6-P63 PHOTONUCLEAR DATA SHEET 82

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. ELEM. SYM. A L

F.R. Allum, T.W. Quirk, and B.M.

Nucl. Phys. 545 (1964)

METHOD

Spicer

Ta 181

REF. NO.

64 A1 5 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ,XN N0X THR-34 C 34 THR-I 6- DST

Table 1 Summary of present experimental data at 34 MeV bremsstrahlung

Element

a*

a*

«i

«Be 0.43 ±0.02 0.05 ±0.01 .c 0.61 ±0.04 0.09 ±O. O: i>Al 0.39 ±0.03 0.05 ±0.01 ,.Ti 0.34±0.02 0.06 ±0.01 ..Cr 34 MeV 0.33 ±0.02 0.02 ±0.01

/* >

r1 0.1 3 ±0.07 -0.02 x 0.0) tiCu 0.36±0.02 0. io±o.o: 0.38±0.02 0. 1

1

± 00 ; s*8a 0.39±0.03 0. 11 ±0. 0: „Ta Bct'o'e ••ni.i' or .»•' i>-on shielding 0.26±0.04 0.1 3 ±0.0: AfiC n 1 ", - "i ... iron shielding 0.27±0.02 0.1 2 ±0.01 nPb target diameter 1 n cm 0.39 ±0.03 o.i5x0.o:

target diameter 1.5 cm 0.40±0.03 o.i9x0.o: uBi 0.42±0.03 0. 1 7 ±0. 0:

cos 6+a, cos' 6

°T JO SO 70 » I" i» 9 (dcgrttt)

form NBS-418

(R EV. 7»1 4» 64) USC OMM-OC 26010-P04 PHOTONUCLEAR DATA SHEET 83

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
L. Green, D. J. Donahue

Phys. Rev. JJJ5, B701-05 (1964)

ELEM. SYM.

Ta 181 73

METHOD

Reactor; neutron capture gamma rays

REF. NO.

64 Gr 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.N ABX THR-11 D THR-11 BF3-1 4PI

Table II. Summary of measured cross sections (millibams).

Source Energy*(MeV) Ta181 Li7 TargetsLi« C11 Bio Aluminum 7.72 4.1± 0.4 0.06 ±0.01 1.13=1=0.12 1.7 ±0.2

Copper 7.91 10.8±1.0 0.07 ±0.01 1.1 ±0.2 0.97±0.13

Chlorine 8.56 29 ± 6 0.17 ±0.12

Nickel 9.00 44 ± 6 0.16 ±0.06 1.6 ±0.3 0.6 ±0.1 0.11 ±0.01

Nitrogen 10.83 121 ±12 1.07 ±0.25 4 ±2 0.9 ±0.2 Chromium 9.72 84 ±25 0.55 ±0.25 0.23±0.05

Iron 7.64 D.0± 0.9 0.079±0.014 1.3 ±0.2 0.23±0.05

Iron 9.30 0.09±0.03 Lead 7.38 0.068±0.035 1.2 ±0.2 0.3 ±0.3

Sulphur 5.43 0.42±0.07 Sodium 6.41 0.6 ±0.1

Titanium 6.75 1.3 ±0.2

Titanium 6.61 b 0.32±0.04 Manganese 7.16' 0.9 ±0.1 0.4 ±0.1

Zinc 7.88 1.0 ±0.2 1.2 ±0.2

• Energies taken from Rets. 4 and 5.

*» Weighted average of 6.7S-, 6.55-, and 6.41-MeV y rays. •Weighted average of 7.26-, 7.15-, and 7.05-MeV y rays.

GAMMA RAT ENERGY (M«V)

Fig. 2. Energy versus cross seciion, Tal8l

(7,»). Boxes are data

of Fuller and Weiss (Ref. 8), circles are data of Bramblett el al. (Ref. 1). The solid line is a smooth curve through the present

cross-section measurements.

form NBS-418

(REV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 84

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDAROS
REF. M. Langevin, J. M. Loiseaux et J. M. Maison

Nucl . Phys. 114-124 (1964)

EL EM. SYM.

Ta 181 73

method

Bremsstrahlung scattering [Page 1 of 2]

REF. NO. 64 La 1 JOC

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G ,G ABX 10-25 C 32 NAI-D DST

Tableau 1 Le paramitrc a(E) de la distribution angulaire

Noyau

11.5-14. MeV

Exp. Ellipsoidal Triax.

14-17.5 MeV 17.5-20 MeV 20-30 MeV

Exp. Ellips. Triax. Exp. Ellips. Triax. Exp. Ellips

Tb °-3 -2:l

5 0.41 0.39 0.54:°;}* 0.70 Ho 0.27:°;} s 0.44 0.407 043 0.71 Er 0.27:°;}* 0.44 0.407 0.8 :°;}* 0.71 fa 0-6 :$;}* 0.58 0.68:°}* 0.81 a^(!l-20 MeV) = 0.9 au (11-20 MeV) 1

Contribution Quadrupolaire %

0.50 25 0.97 0.85

0.53 25 0.95 0.9 0.4±0.l

0.53 25 0.95 0.9

20 0.96

0.7 ±0.1 1

Fig. 4. Sections efficaces diff6rentielles de diffusion obtenues pour le tantale. Les courbes trac6es correspondent 4 l'application des relations de dispersion aux sections efficaces d’absorption obtenues

par Fuller et Weiss *•) (F.W.) et par Miller et al. •). (M.S.T.).

FORM NBS-418

IR EV. 7-1 4-84) USCOMM-OC 2S01O-P84 PHOTONUCLEAR DATA SHEET 85

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREA' OF STANDARDS
M. Langevin, J. M. Lois'eaux et J. M. Maison

Nucl. Phys . j>£, 114-124 (1964)

ELEM. S YM.

Ta 181 73

METHOD

Brerasstrahlung scattering [Page 2 of 2]

REF. NO. 64 La 1 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

11.5-14 MeV 14-17.5 MeV >7 5-20 MeV

Fig. 8. Repartitions angulaires du rayonnement diffuse obtenues pour le terbium, rholmium,

1’erbium et le tantale dans les zones d’energic 1 1.5-14 MeV, 14-17.5 MeV et 17.5-20 MeV.

form NBS-418

(REV. 7-14-64) USC OMM-OC 2S010-P64 PH0T0NUCLEAR DATA SHEET 86

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. D. F. Herring, I. C. Nasciraento, R. B. Walton, and R. E. Sund

Phys. Rev. 139 . B562 (1965)

ELEM. SYM.

Ta 181 73

method REF. NO.

65 He 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E,N RLY THR- 32 D 14-32 ACT1

4PI

E+.N RLY thr-32 D 14-32 ACTI

4PI

Ratio of positron to electron induced activity determined.

X

Fio. V The ratio a~/a* as a function of atomic number at 27-MeV (total) bombarding energy. The straight line is for comparison purposes.

/

form NBS-418

(R ev. 7-1 4-MI U1COUM.DC 2S010-P84 PHOTONUCLEAR DATA SHEET 87

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
F. W„ K. Firk

Proc. Gatlinburg Conference 352 (1966)

ELEM. SYM.

Ta 181 73

METHOD REF. NO. 66 Fi 2 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN SPC THR-60 c 60 TOF-D 5-40 90

Neutron Energy — MeV

5 SO 10

c

Fig. 1. Observed photoneutron time-of-flight spectra of C, O, Mg, Si, Ca, Co,V, and Ta.

form NBS-418

(REV. 7-14-64) USCOMMoQC 260 1 0- P<34 PHOTONUCLEAR DATA SHEET 88

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
G. P. Antropov, I. E. Mitrofanov, V. S.

Izv. Akad. Nauk SSR Fiz. ,21, 336 (1967)

Bull. Acad. Sci. USSR JJ., 320 (1967)

METHOD

Russkikh

, C.M- C.IV1 . o t rvi . M

Ta 181

REF. NO.

67 An 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX THR- 20 C 8-20 BF3-I 4PI

s5

Fig. 5. Experimentally determined cross section clyn) + 2a,T. for ^- 8 ^Ta. The lower

curve was calculated for o< T. 2 »> with a = 18.1.

FORM NBS-418

(R KV. 7*1 4-S4» use OMM- O C 26010-P64 PHOTONUCLEAR DATA SHEET 89

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REP. H. M. Gerstenberg and E„ G„ Fuller

NBS Techo Note 416, June 1967

METHOD

ELEM. SYM.

Ta

REF. NO.

181 73

67 Ge 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N ABY THR- 27 C 22.27 BF3-I 4PI

Table 7. Comparison of neutron yields. Yields are given In units of (neutron cn^/MeV nucleus)xl0 38

. The estimated uncertainties In Y and Y

c are of the order of 6$ and 10$, respectively.

form NBS-418

(R EV. 7-14* 04) USC OMM.DC 2S010* PS4 PH0T0NUCLEAR DATA SHEET 90

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Fig. 31. Absolute neutron yield as a function of atomic number. The neutron yield from calcium

(Z = 20) la particularly low In comparison with the other elements because Its (y,n) threshold

is high compared to the mean energy of the giant resonance.

91
r

EL EM. SYM.

Ta 181 73

REF. NO. 67 Hu 1 EGF

R. R. Hurst and D. J. Donahue

Nucl . Phys. Agl, 365 (1967)

METHOD

Neutron capture gamma rays

RESULT EXCITATION SOURCE DETECTORREACTION ANGLE ENERGY TYPE RANGE TYPE RANGE

G.N ABX 8-11 D 8-11 B, £3.7.1 API

Table 1 Photoneutron cross sections (mb)

Fig. 1. Cross section (in mb) versus mass number of the target for gamma-ray energies of 9.00, 9.72 and 10.83 MeV. The solid lines are plots of eq. (1) in the text.

Target 7.72 MeV 9.00 MeV 9.72 MeV 10.83 MeV

“Co 9.0± 0.8

,5 As 20.4 ± 1.7 “Nb 0.53 ± 0.10 14. 6± 2.2 25.8 ± 2.1 ‘“Rh 1 0.6 ± 1.7 38.8 ± 3.1

107 Ag

1 10, Ag j “‘In

10.0± 1.5 17.1- 2.6

37. 6± 2.9

33.3 ± 2.7

ia, Sb 1 123 Sb j 20.7 ± 3.1 42.5 ± 3.6

127 J 38.7 ± 5.8 38. 8± 3.1

133 CS 3 1 .7 ± 4.8 52.5 ± 3.8

13, La 8.61 ± 0.86 40.8 ± 6.5 63.0± 5.0 i4ip

r 21.5 ± 3j/ 58.3 ± 4.1

141 Eu 1 1MEu

28.9 ± 3.2 61.3 ± 14.7 102 ±18

“‘Ho 35.6 ± 4.3 92.2±27.6 150 ±20

mTa 4.14±0.36 45.4 ± 3.7 65.0± 5.5 146 ±12

“'Au 44.5 ± 3.6 68.4 ± 1 3.5 160 ±15

20.pb <34.3 238 ±29

30«p b 22.6 ±11.3 280 ±31

203 Bi 36.1 ±12.0 226 ±27

92

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A. V. Mitrofanova, Yu. N. Ranyuk, and P. V

.

J. Nucl. Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

METHOO

Sorokin ELEM. SYM.

Ta 181 73

REF. NO.

67 Mi 1 HMG

RESULT EXCITATION SOURCE DETECTOR

" REACTION ENERGY TYPE RANGE TYPE RANGE

ANGLE

G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 - 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

nucleus i-issionability D

Cross

section <t», n(3

Nucleus

Kissionai>ilily D

Cross

section <rK ,

Bi 0.1t±0.01 7 . 8 -^- 0.

6

Os 0.0058 ±0.0005 0.37±0.04

Pb 0 . 050 ± 0 . 004 3.4±0.3 Re 0 . 0058 ±0 , 0000 0,35±0,04

T1 0.031 ±0.003 2, 1 ±0.2 Ta o. on/, 5 x 0,0005 0.27 ±0.03

Au 0.01 9 ±0.002 1.25±0.10 I ilf 0.UO42± 0.0004 0.25±0,03

Pt 0 01 2 ±0,002 0.80±0.08 1 £* G«v

Fig. 2. Photofission fragment yields as a function of ZVd. The

ordinates are values of <ru in units of cm2

.

form MBS-418

(REV. 7-1 S-S4I USCOMM-OC 26010- P64 PH0T0NUCLEAR DATA SHEET 93

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Yu. N. Ranyuk and P. V. Sorokin

J. Nucl . Phys. (USSR) 37 (1967)

Sov. J. Nucl. Phys. 26 (1967)

ELEM. SYM.

Ta 181

METHOD REF. NO.

67 Ra 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,F ABX THR-260 C 200-260 EMUI

4PI

Fig. 4. Photofission cross sections of Os, Re, Ta, and Hf as functions of photon energy.

TABLE III

MeV

Cross section per equivalent y quantum, lO"* cm1

Os Re Ta HI

200

220 240 260

17±2

224-2 33+3

45±4

11.8±0.8

17+1

29+1

36±2

5.2±0.3

8.6+0.5

13.0+0.6

17.2±0.7

3.2±0.7

4. 8±0.

3

8.2±0.4

11.2±0.5

FORM NBS-418

(R E V; 7-l*.e«> use OHM. O C "2S0 1 0- PB« PHOTONUCLEAR DATA SHEET 94

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. S. Shimizu, Y. Isozumi and Y. Phys. Letters 25B . 124 (1967)

METHOO

Nakayama EL EM. SYM.

Ta 181 73

REF. NO. 67 Sh 3 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G/ ABX 18 D 18 NAI-D 0-18 90

(17.6) (17.6)

Photon source: 1 MeV proton on Li metal RAMAN SCATTERING

d = (9.6 ± 3.9) X 10* 28 cm

2

exp

FiR. 1. The observed spectrum of photons from a tran- sition of y* (303 koV) — y* (ground stale) in coinciden- ce with the nuclear Raman scattering of Li(p.*/) y rays

/

FORM NBS-418

(REV. 7-14-MI use OMM-OC 260 I 0- P.4 PHOTONUCLEAR DATA SHEET 95

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
R. Bergere, H. Beil and A. Veyssiere

Nucl. Phys. A121 . 463 (1968)

EL EM. SYM.

Ta 181 73

METHOD

[Page 1 of 2J

REF. NO.

68 Be 5 egf

EXCITATION ENERGY

SOURCE DETECTOR

REACTION RESULT ANGLE TYPE RANGE TYPE RANGE

G,N zs-t ABX THR-30 D 7-30 MOD- I 4PI

G,2N 3<o ABX THR-30 D 7-30 MODI

4PI

G,3N 2 7 ABX THR-30 D 7-30 MODI

4PI

G,4N 3? ABX THR-36 D 7-36 MODI

4PI

Table 2 Lorcntz line parameter? for a two or three lines fit to the total cross section data of *"Ta

Ei Oi rl (7l r, Et aj rt e% ot rs 3 (MeV) (mb) (MeV) (MeV b)

2 Lorentz lines 12.35 270 2.57 0.693 15.30 330 4.47 1.47

3 Lorentz lines/ 12.30 280 2.45 0-6^6 14.85 210 3.32 0.698 16.10 155 4.975 0.771

• form NBS-418

I (REV. 7-I4-S4)

[ USCOMM.OC 2«0t0-P««

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS PHOTONUCLEAR DATA SHEET 96
R. Bergere, H. Beil and A. Veyssiere

Nucl. Phys. A121, 463 (1968)

ELEM. SYM.

Ta 181 73

METHOD

[Page 2 of 2]

REF. NO. 68 Be 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

1.04

Q3 1 14 16 18 20 22 ‘ MeV Ej

Fig. 2. Reciprocal neutron multiplicity as a function of y energy for *"Ta.

Fig. 3. Total cross section data showing a two Lorentz line fit for a ‘"Ta target. form NBS-418

(R CV. 7-1 4-641 U9COMM.OC 26010-P64 PHOTONUCLEAR DATA SHEET 97

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS
H. R. Bowman, R„ C. Gatti , R. C. Jared, G. Kilian, L. G. Moretto,

S. G. Thompson, M. R. Croissiaux, J„ H. Heisenberg, R. Hofstadter,

L. M. Middleman, and M. R. Yearian

Phys. Rev. 168 . 1396 (1968)

ELEM. SYM. A

Ta 181 73

METHOD REF. NO.

68 Bo 1 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,F ABI D 250, 500 EMU1

4PI

(MICA )

Table I. Experimental results.

Target Thickness Method

used

Fission cross section 250 MeV r (cm*) 500 MeV e~ (cm*) ,,u». 85 Mg/cm* Mica (6.0±1.2)X10~*T (9.4±1.9)X10-v

»»U*" 162 Mg/cm* Counter (5.0±1.0)X10-** (7.0±1.4)X10-«

uUi** 1 mg/cm* Mica (2.3±0.5)X10-*» (1.4±0.3)X10-«

7«Ta1H 4 mg/cm* Mica 3.9X10-*'"

• U**/U“* wa« 1.12 X 10”* in target sample.

b Not corrected for photofission contribution free (4) in text].

form NBS-418

(REV. 7® 1 4» 04) USCOMM-OC 26010-P04

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 98
REF. N. N. Kaushal, £. J. WinhoLd, P.

R. H. Augustson

Phys. Rev. 17$, 1330 (1968)

METHOD

F. Yergin, H. A. Medicus and ELEM. STM.

Ta

REF. NO.

181

68 Ka 1 HMG

REACTION RESULT EXCITATION

EN ERGY SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.N ABX 50-35 C 55,35 T0F-D 10-35 c

~

v L • _

.Sv*...

»«IH

f H,

h

'.•»>

.th*

if— i

•i a *>*

f

' '•

. . \ , . I U * V '• •. m hfNeUTROW CNCRQY.MtV

Fro. 6. Observed neutron spectrm due to 55-85-MeV difference photon spectra. The effective cross sections have been divided by

Fic. 7. Effective cross sections for production of fast neutrons with energies greater than 10 MeV (solid circles) and 30 MeV

(open circles) by the 55-85-MeV photon difference spectrum. The

dashed curves are modified quasideuteron model predictions as discussed in the text.

NEUT ENGY SPEC

Table I. Comparison of present cross-section values in mb

for production of nigh-energy photoneutrons by 55-85-MeV photons with measured cross sections 9(.y,Tn), alio in mb, for totai photoneutron production. The present cross-section values are uncertain by 8 to 10% because of counting statistics and normalization errors; in addition all values depend on an absolute normalization in terms of the deuteron photodisintegration cross section, which is known to about 10% at these energies.

Target

lr(da/doi)t7° (£.>10 MeV)

[Present experiment]

<r(y,Tn) Jones and

Tenvilliger* Costa tl al.h Other

results

Li 0.75 1.0 Be 1.0 2.7 2.3 2.3° B 1.0 1.4 C 1.5 1.3 1.4 2.4d O 1.3 1.6 A1 2.8 5.5 4.6 8* S 2.1 4.4 6.511 Fe 4.2 16 12 Cu 4.3 20 19 Zn 4.4 15 In 7.4 Sn 7.0 Ta 10.7 95 n 10.7 Pb 8.3 100

Bi 13 U 16 65

. , Average cross sections between 55 and 85 MeV. as read from Figs. 4 and 5 of Ref. 4.

t> fa*‘tdE-fowvdE/SO. as taken from Fig. 4 of Ref. 5 and Table I of Ref. 6.

• S. Costa. L. Paaqualinl. G. Piragino, and L. Roasio. Nuovo Cimento

42.306 (1966). „

4 G. Bishop. S. Costa. S. Ferroni. R. Malvano. and G. Ricco. Nuovo

Cimento 42. 148 (1966).

form NBS-418

(REV. 7-1 4- 64 ) USCOMM-OC 26 0

1

O* P6 4 PHOTONUCLEAR DATA SHEET 99

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A. Veyssiere,

C.R. Acad. Sc

METHOD

H. Beil and R. Bergere

ELEM. SYM. A Paris 267, 234( 1968) Ta

REF. NO.

181 73

68 Ve 1 egf

EXCITATION SOURCE DETECTOR

REACTION RESULT ANGLE ENERGY TYPE range TYPE RANGE

G,N ABX THR-36 D 7-36 MOD- I 4PI

G,2N ABX THR-36 D 7-36 MODI

4PI

G,3N ABX thr-36 D 7-36 MODI

4P1

G,4N ABX THR-36 D 7-36 MODI

m

j £il> 2

.n^ d£ = 27 ± 2%.

form NBS*418

(R EV. 7-1 4-04) USC OMM-DC 20010-P04 PHOTONUCLEAR DATA SHEET 100

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REE. Yu. P. Antuf'ev, V. L. Agranovich, V. B. Ganenko, V. S. Kuzmenko,

I. I. Miroshnichenko, and P. V. Sorokin

Ukr. Fiz. Zh. J^., 248 (1969)

EL EM. $ Y M . A

Ta 181

RE C . NO.

69 An 6 esf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE type RANGE

G,P ABY 103-999 C 700,999 TEL-D 97-230 DST

G,D ABY 1C9-999 C 700,999 TEL-D 97-205 DST

999 - 1.2 GEV

Summary

The cross-sections of the (y, p) (Y. d) reactions were investigated. Li7

, Be’, ClJ, Si w, •Cu1

*, Mo74 and Ta 1 " targets were irradiated with the bremsstrahlung of 700 and 1200 MeV

maximum energy from the Kharkov PhTI Ac. Sci. UkrSSR linear accelerator. The photoprotons and deuterons were detected by the scintillation telescope at 30°, 60®, and 120* with the beam. Possible mechanisms of the proton and deuteron photoproduction are dis- cussed. The qualitative agreement of A dependence of the cross-sections is observed with a suggestion on the meson mechanism for these reactions.

0*3 t OQUEl) 7 ° (,‘1100Met

* * * f

*

• • • i ul. * uil

•

/ '

1 *

•

< •

1

v • Vil > *

06 / ./*» voFq Wa n E.-noontt

Phc. I. 3a^eMHicrb nepeptey (y, p)-peaKuiI aia Ay a — 0 —30®, £,—97 Mea; 6 — £,—

-205 Mea; a — 0-60®, £,-230 Mea; e — £,-157 Mea (X— flam [3]); d — 0-120®,

O — £,— 120 Mea, A — £, — 157 Mea, o — £,—230 Mea. A6covi»THe 3HaneHHJ« nepepi3y HaaeAeHO npn exeprii npoTOHia £,-120 Mea. I Hiui jam Hop.MosaHi ao nepepmy ana Li7 npu £, — 120 Mea.

Phc. 2. 3ajiex<HicTb nepepiay (y, d)-peaKuii Bia NZIA: a — 0 — 30®, £<—97 Mea; 6 — 0 —

-30®, £<-205 Mea; a: A — O-60®, £<-97 Mea, 0-0-120®, £<-97 Mea (nepepi3a HaBeaeHi b ofliimmax I0 -U ejp/crep • Mea • Q).

porm N8S-418

(REV. 7-1 4-64) USC OMM-OC 26 0 1 O- Pfl 4 PH0T 0NUCL EAR DATA SHEET 101

U.s. DEPARTMENT of COMMERCE

NATIONAL BUREAU OF STANDARDS
REF E LEM. SYM. A

' Yu. P. Antufyev, V. L. Agranovich, V. B. Ganenko,

I. I. Miroshnichenko, P. V. Sorokin

Ukr. Fiz. 14, 496 (1969)

METHOD

V. S. Kuzmenko,

Ta 181 73

REF. NO.

69 An 8 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

1) E,P RLY THR-999 C 999 MAG-D dst

2) E,D RLY THR-999 c 999 MAG-D DST

3) E,T RLY THR-999 c 999 MAG-D dst

The differential cross-sections of (y. P). (y. <0 and (y, t) reactions on carbon for W end 1200 MeV maximum energies of photons and energy distributions of the secondary particles were measured at 30, 60 and 120“ of particle emission angles. Excitation

Unction for protons with the- energy of 97 MeV is given for the maximum incident photon

'scrgy from 400 to 1300 MeV. Deuteron to proton and triton to deuteron yield ratios for

. anous nuclei are also shown.

Experiment was carried out at the Kharkov linear accelerator. The particles were

cetectcd by scintillation counters after a magnetic spectrometer.

Possible mechanisms • of the high energy photon-nudei interactions are discussed.

•tfi Figs).

1) 999 = 1 GEV, REL P/D

2) 1.3 GEV, REL P/D, D/T

3) 999 = 1 GEV, REL D/T

TafijiHita 2

9* | d’a d{2p\ \d>a v

{,p)

|

i aluo / dudp 1 10

[•rfH»

f <3p)/4»O d<2p)|

[ dado 1 dQdp J l0*

Li» 60 1 ,94 ±0, 19 2, 1 ±0,3

120 0,8±0,08 0,9±0, 13 C» 60 2,2±0.2 1 ,8±0,3

120 — —

Ta*« 60 3,1 ±0,3 2.8±0.4

120 1 ,89±0.2 l.85±0.28

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 102

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. EM. 3 < M

.

METHOD

I. A. Grishaev, V. P. Efimov, V. I. Kasilov,

Yu. N. Ranyuk, P. V. Sorokin, A. N. Fisun

Ukr. Fiz. Zhur. 14, 1818 (1969)

V.I. Noga,

Ta 181 73

REF. NO.

69 Gr 2 egf

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,N RLY THR-999 C 70-999 ACT -I 4PI

999= 1 GEV.RLY E-/E+

DIS INTEGRATION OF HEAVY NUCLEI

BY ELECTRONS AND POSITRONS

I. A. Grishaev, V. P. Efimov. V. I. Kasilov. V. /. Noga.

Yu. N. Ranyuk. P V. Sorokin. A. N. Fisun

Summary

Gross section ratio for the uranium and tantalum disintegration by electrons and positrons is equal to unity within the experimental errors over the investigated energy range Irom 70 to 1000 MeV and Is In agreement with Barber's measurements aod Roden- berg's calculations.

Q2 Q4 Q6 Q0 (jd

form N3S-418

(R EV . 7-1 4-64) use OMM-OC 2C010-P64 PHOTONUCLEAR DATA SHEET 103

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
C.M . D B. S. Ishkhanov, I. M. Kapitonov,

and 0. Po Shevchenko

ZhETP Pis. Red. JLO, 80 (1969)

TKTP Letters 10. 51 (1969)

METHOO

E. V. Lazutin, I. M. Piskarev,

Ta

REF. NO.

181 73

c9 Is 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 7-30 C 7-30 MODI

4PI

FORM NB$*418

(R EV. 7-1 4-04) USC OMM-OC 2e010-P64 PH0T0NUCLEAR DATA SHEET 104

U.S. DEPARTMENTOF COMMERCE

NATIONAL. BUREAU OF STANDARDS
H. Tsubota, N. Fujiwara, H. Ishimaru, E. Tanaka,

M. Kanazawa and N. Mutsuro

J. Phys. Soc. Japan 26, 1 (.1969)

METHOD

T. Aizawa, ELEM. SYM. A

Ta

REF. NO.

Z

181 73

69 Ts 1 egf

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.N NOX 15-26 C 26 SCI- D 7- DST

(25.5)

Paper gives summary of angular distribution measurements.

Tabic I. A summary of the results. \V(0) = A — 3 si r.-O-i-C cos 0

Target i E.u(MeV) A 3 C B/A C/A

Bi 7.4 0.65 —0.02 o.35=o.:: o Mo bLa 0.55=0.20 0.24=0.10

8.7 0.66=0.01 0.34=0.06 0.18=0.03 o.5i =0. :o 0.27=0.06 Pb 7.4 0.45-0.05 0.55 = 0.; I 0.10=0.01 1.22=0.25 0.22=0.04

3.7 0.75=0.03 0.26=0.03 0.17=0.03 0.22 = 0.03 0.22=0.03 T* 7.4 0.69=0.02 0.32 = 0.03 0.03=0.01 0.46=0.05 0.05=0.02

8.7 0.80±0.04 . 0.20=0.02 0.05=0.03 •n II bo*r br| 0.07=0.04

<d

°*-

02-

0

'- —

0° 30” 60“ 50“ i20° 150“ i3C' EMISSION ANGLg.

Fig. 7. The angular distributions of fast photo- neutrons from Ta irradiated with 25.5 McV

/ orcmsstrahlung.

(a) The neutron detecting bias energy is set at 8.7 McV.

(b) The neutron detecting bias energy is set at 7.4 McV.

FORM NBS-418

(REV. 7-1A-64I USCOMM-OC 26 010* P64 PHOTONUCLEAR DATA SHEET 105

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
YUo P. Antuf'ev, V. L. Agranovich,

I. I. Miroshnichenko, and P. V. Yad. Fiz. 12, 1143 (1970); Sov. J.

METHOD

V. G. Ganenko, V. S. Kuz'menko,

ELEM. SYM. A

Sorokin

Nucl. Phys. 12 , 627 (1971) Ta

REF. NO.

181 73

70 An 5 hmg

REACTION RESULT EXCITATION

EN ERGY SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE E,P RLY 86-999 C 999 TEL-D 80-265 DST

FIG. I. Angular distributions of protons with energies of 80, 160, and 285 MeV produced from C'1

, A!37, Ni”, and Ta1 " nuclei by photons with maximum energy 1 140 MeV. Only the statistical errors are shown.

999 = 1140 MEV

FIG. 2. Angular distributions of 80-MeV protons ( normalized at 6 =

40° (the solid circle) forC IJ (0) and Ta m (X), E>mlx = 1140 MeV.

4 FIG. 3

FIG. 3. Total cross section for proton production per nucleon. ^7 max

= 1 140 MeV. Dashed curve-theory from ref. I I.

UK. S. Kolbig and B. Margolis, Nucl, Phys, B6, 85 (1968).

form NBS-418

(REV. 7“t 4. 04} uscomm-oc zeoio-pea

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS PHOTONUCLEAR DATA SHEET 1Q6
REF. ELEM. SYM.

C. E. Burgart , E.A. Straker, T.A. Love, and R. M. Nucl. Sci. & Engr. 42, 421 (1970)

METHOD

Freestone, Jr.

Ta

REF. NO.

181 73

70 Bu 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E.XN SPC 7-140 c i^o T0F-D 165

THICK TARGET

Fig. 2. Photoncutron energy * pect rum produced by 140-McV

electron* incident on lunl.iluin.

,/

form N3S-418

(R EV. 7-1 4-641 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 107

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
Yu. P. Antuf'ev, V. L. Agranovich, V. B. Ganenko

,

I. I. Miroshnichenko, and P. V. Sorokin

Yad. Fiz. L3, 473 (1971); Sov. J. Nucl. Phys. 13,

METHOD

V. S. Kuz'menko

ELEM. SYM. A

265 (1971) Ta

REF. NO.

181 73

71 An 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,P SPC 36-999 C 700.999 TEL-D 25-400 dst

G,D SPC 43-999 C 700,999 TEL-D 25-400 DST

Yield of protons 30-400 MeV, deuterons 30-200 MeV. 999=1. 2 GEV.REL D/P

Table I. Values of the parameter r, MeV

E, - 700 MeV . - 1200 MeV

Tugvt Protons Deuterons Protons Deuterons

*0* W> ®* too* 120* KO° 60* 80* too* 120* JO* 60* 120* »• 60* 120*

Li 48 42 34 30 27 28 24 22 21 20 45 28 27 24 Be 48 43 36 30 27. 28 28 24 22 19 45 28 27 24 C SO 44 38 30 26 34 33 29 23 19 60 48 35 37 34 22

Si 43 28 27 22 46 35 28 25 Cu 45 29 27 24 Ta 28 21 45 34 27 24 Pb SI 29 36 22

The measured secondary-particle spectra for kinetic energies T > 80 MeV are well described by

the expression

<Fa I diidTQ = const T exp (—T/ t),

which is identical to the formula for the evaporation

process.^' In Table I we have given the values of the parameter r for the nuclei studied, at various angles.

The accuracy in determination of r is about 10%.

0.JFIG. 4. The ratios Nj/Np as a function of target-nucleus mass number A at an angle 0 60° for E0 » 1-00 MeV. Solid curve -A® ,J

.

ui» c a n»i mu *

a ;t> >o uj ..? *

form N3S-418

(R EV. 7-1 4-641 USCOMM-OC 26010-P64

U. S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 108
Yu. P. Antuf ev, V.L. Agranovich, V.B. Ganenko, V. S. I. I. Miroshnichenko, and P. V. Sorokin

Yad. Fiz. 14, 898 (1971)

Spy. J. Nucl. Phys. 14. 502 (1972)

METHOD

Kuz menko

,

ELEM. 3YM.

Ta

REF. NO.

181 73

71 An 2 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XD ABX 101-999 C 999 MAG-D dst

999 = 1.14 GEV

FIG. I. Angular distributions ol' deuterons in ( 7 . d) reactions in nuclei for E<, 3 620 MeV (a-c) and E, 3 1 140 MeV (d-k). The statisti- cal errors are shown, a-g-angular distributions of deuterons with energies of 90 MeV. h-k-with energy 160 MeV.

A

FIG. 2. Angular distributions of 160-MeV

deuterons normalized at 0 3 40® for C

IJ (A) and Ta 1 " (O) for E* - 1 140 MeV.

10 «**

31 > 00 K-O

*L.b- Jc*

FIG. 3. Angular distributions of 90-MeV

deuterons normalized at d = 40® for E<> 3

1 140 MeV (O) and Eo 3 620 MeV (A).

10 ">0

’lib- Jc*

,/

form N3S-418

1R Ev. 7-1 4-S4I USCOMM-OC 2S010-P64 PH0T0NUCLEAR DATA SHEET 109

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
C„ B. Fulmer, K. S. Toth, I. R. Williams, and G. F. Dell

Phys. Rev. C4, 2123 (1971)

ELEM. SYM. A

Ta 181 73

METHOD REF. NO.

71 Fu 4 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G , SPL RLX THR-999 D 999 ACT -I 4 PI

(5 GEV) (5 GEV)

Measurement of F values (the ratio of photo

disintegration to electrodisintegration cross

sections).

999= 3 GEV

TABLE I. Experimentally measured F values for several nuclides produced in targets bombarded with 5-GeV

electrons

.

Target Nuclide F

Aluminum 14Na 2.4 ±0.4 Aluminum ? Be 3.3 ±0.5

Iron 53 Mn 2.0 ± 0.3 Iron 4«Cr 2.0 ± 0.2 Iron 4 *"Sc 2.4 ±0.4

Iron J4 Na 3.2 ±0.4 Tantalum 1T5Hf 2.0±0.3 Tantalum lnLu 1.9±0.4

/

form N3S-418

(REV. 7-1 4-841 USC OMM.OC 2601 0-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 110
Pe,r - T. Methasiri and S. A. E. Johansson

Nucl, Phys. A167 . 97 (1971)

ELEM. SVM.

Ta 181 73

method RE C . NO.

71 Me 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ,F ABY THR-900 C 300-900 FRG- I 4PI

r wl

1 -

o

if2 1

0

J L

i<5 4 -

d* Conalh* il at O Mitrofanova d «L

• Proton! work

u3*L 20 30

Fig. 2. Nuclear Hssilitics as a function of Z

1 jA.

Table 1 The constant fission cross sections above the threshold

Element <7, (cm1

) Element <r, (cm*)

Pb (5.0±0.2)x 10-” La (1.1 ±0.1) x 10-** Au (l'.7±0.1)x I0‘ J7 Sn (4.3 ±1.1) x 10 -2 * T» 0-3 ±0.2) x 10* 2 * / Ag (8.4 ±2.0) x 10* 2 * Yb (1.2 ±0.2) x 10* 2i Mo (1.7 ±0.4) x 10* 2 * Ho (5.5±0.3)x 10" 2 * Cu (6.6±1.2)xl0-»*

Gd (5.3 ±0.8) x 10* 2 * Ni (5.8 ±0.1 ) x 10* 2i Nd (1.3±0.2)xl0* 2 *

[over

j

FOau NBS-418

E V. 7.1 4-841 USC OMM- O C 28010.004 PHOTQHUCLEAR DATA SHEET 111

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
(a) (b)

Fig. 1. Cros^ sections per equivalent

quantum d (E) as a function of log E.

/

112

l
REF.

E. J. Moniz , I. Sick, R. R. Whitney, J. R. Ficenec, R. G. Kephart

and W. P. T rower

Phys. Rev. Letters 26, 445 (1971)

ELEM. SYM. A

Ta 181 73

METHOD REF. NO. 71 Mo 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,E/ ABX 0-240 D 500 MAG-D 60

_

Table 1. Nuclear Forml momentum 4 r and average

nucleon Interaction energy <: determined by least- squares fit of theory to qunsiclastlc peak

*F I Nucleus (McV/c) 4 CMeV) b

jLi® ir,9 17

221 25 nVg2* 235 32

z„Ca

40 251 28

zaNi

5®*7 260 36 v« n Y 254 30

1^*7 so»n 260 42 Tn 1 " 1 7i 1 n 266 42

in 7#n

ii? * '» 266 44

4 Thc fitting uncertainty In these numbers Is approximately ±5 MeV/c.

b The fitting uncertainty in these numbers is approximately ±3 MeV. Simple estimates for T give numbers

in reasonable agreement with those in the table

/

form N3S-418

(R EV. 7-1 4-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 113

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF- G. A. Vartapetyan, N. A. Demekhina, V. I. P„V. Sorokin and A.G. Khudaverdyan

Yad. Fiz. 14, 65 (1971)

Sov. J. Nucl„ Phys. 14, 37 (1972)

METHOD ~ "

Kasilov, Yu. N. Ranyuk, ELEM. SYM. A z

Ta 181 73

REF. NO.

71 Va 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECT OR ANGLE

TYPE RANGE TYPE RANGE

G.F ABX 100-999 G 100-999 TRK-I 4PI

999 = 5 GEV

RiolofiuMMi yield* per cm1 per equivalent photo*

u*- *" ' Hi- Au *• Ta-

|(M> (226 * 20) 10 ° (1211*12) 10 ” (50±5)IO-° (0.7(1* IK*) IW * (3.0 - 0 4| 10 •

1 Jl) ll 5-112) 10 » (1 i 1 o/) lo A HO (2.<i *0.2) 10 • (2.0 *.<1 2) 10 *

ISO (240*20) 10-° ID.) *7) 10 »

160 (3.1 *0.3) 10-° (3.7*o4| 10 "

1*0 (4.0*0 5) 10 |5.5-'I6| I0-*

2u<> (265 * 30) IO-» (150*15) - ll>-° (72*7) 10-° (6.1 -0.6) 10 (8.2*0.81 10 » (4.9*0J) 10 »

220 18.3*0.8) • l(r° (l.l -0.1)10-° (8.2*08) • IO-»

240 (1.2*0.1)10-° | l.5*0.2) • 10- (IJ-O.I) io-»

'215 (156*16)10-°

260 (1.5*02) 10” ( 1.1*2 0.2) 10-

»

(l.6*0J)l0-°

2d» (160-1-16)10-° (85*9) 10-°

JU0 (2.2*02) 10° (2.3*0.2) Ml-* uo (3.5*04) 10° (4.4i.i)4, J0-*

370 (4 2 **.‘.4) 10 ° ('<"*0.5) 10 r

400 (318*30) 10-° 1 175*20) 10-°

4J0 (106*11)10-° (7.0 1" 7) -ry «

4>* (5.4 *(l 5| 10 ” (6.0 • o 7 ;J * . 4 <6.7 *0.7) !<* *i i‘j i *<<••) :o °

< l*o -2»») • !<> :7

. 115*12) '0 •' ((.<• 0.7) • M» r (0,1; * ') • • *

•n 17 .“ *0.61 !" ° 1 1 • ' o

” 1346*35) -lO-"

7.7 °o>) io lT

1 .2

• , .0 r Il.7i0.2l - IO-*

64*3 .18.5 3.9) 10 "

ii.

1 *• '' °

(200 -20) III 1120*12)10-" 18.5-0.9) ,11 ° 1 1.5 ''I- 10 °

(9.2—0.**) • 10 ° ii .•*<».) ;o- r

1 2.4 *0.2) 10 °

sro (10.: -.DIO * <1

- - 112)1 M -° lit!* 22)* 10

((35*14)10-°

''5*' * 40) • 10" r

" 1224*23) • 10'° (14"* 14) 10°

• 1 1 , i.-'r OJ) 10 "

(11.3*1.1) 10-° M/>-0.2)

*

i r

>< 4U) iO r

; 4 f.'Hi».r4m • I0‘ r <217*23) 10-° (136-U) (')-

'

i i'2J*I2J)-10 ° '.* r-

(13.5* 1.4) • 10-° 2. -.7 °

, T -'

i lTJrrJ”) • 1C* 1

i :52* :3) ;u "

; i» i i 14.3* 1.4) • 10 ° I'.n •• y

i Vj 4’i » :•» r •22> t 21) • in

’’

( 155.-: IT.) !0 39

( 1 3/» - I 4) !o 1"

i .• °

i 15.5* 1 >.| IO °

'•r • in* io ~ «2'*7 ° 21) M* ” ( i ;•» hi • io ~

° 1 .** . 1 <!> * 15 1 Ml v I l\‘l 24) • lo v 1 155 » III) III ”

» I'm • ••\ 2 15 ‘

) 1" <152 15) III ' r |M 1 •1.4) l«.»

• *;0 ' I.Vi • •» .1 u» ( 2 M» • 10 J/

( i4«, • i:.» io ,r

. if * *.M', :•» *• (251 ±25) In ”

1 1 I V T>) 10 ,j,...iji ; >j

••< (64*061 10 *

• (15.0 - 1.6) :o 3 or *» J* l

.» p (D6*0.7l 10 *

• 5* A i.ro • so)- io-« (264x27) • 10 ” (lt2* !3) • JO »

4«j».«J (-177.-. 50) • I'l <280*281 10° (20.2*2)- 10 r u' at 0.3* lir

(88*0.7) IO’ »

*) (195*5.1) ID-'' 1274*211) -IO-" <206 * 21) 10-° (20.2*2) to-" (2.5 *0.3) !* <— ° (6.3 rO.M IO'-*

FIG. 3. Solid heavy curve -photofission cross section ol Br"' Xu'*7

. Ta'" 1 Dashed curve-the sati)e cross section, integrated j>ver the Sctuii bremsstrahiung spectrum (yield per equivalent photon ;as a l unction of bremsstrahlung maximum energy). Thin line -cross section for >p in- teraction, multiplied by the number of nucleons in the nucleus .,nd by

the fissility

form N3S-418

(R ev. 7-i a-eai use OMM.QC 28010-P64

(over)

U.S. OEi, »-.X''MENT OF COMMERCE

NATIONAL •UftKAUOF STANDARDS PHOTONUCLEAR DATA SHEET 114
REF.

METHOP

W. G. Barber, E. Hayward, J. Sazama EL EM. SYM. A

1 z PICNS-7 2, p. 313 Sendai

Ta 181 73

REF. NO.

7 2 Ba 16 hvm

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

$ G,G RLX 15.1 D 15.1 NAI-D 90

POL G; ALSO G/

( dcr/ dQ ) || to polarization vector

(do/dQ)j_ to polarization vector

Table 1. Results and Comparison with Theory

Target

do' .'Arbitrary

rr

.,/j_ Units) n(exp) n(DCM) n(HD)

Cd 0. 39±0.05 0.09+0.08 0.19 0 Sn 0.65±0.06 o.n+o.06 0.067 0 Ta 1.74±0.14 0.14+0.07 0.180 0.155

Au 2.08±0.15 0.17+0.06 0.067 0

B1 2 . 65±0 . 26 0.02+0.06 0 0

/

popm N3S-418

(REV. 7- 1 4-64) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 115

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
N„A. Demekhina, V. I. Kasilov, A.V. Mitrofanova, Yu. and P. V. Sorokin

Yad. Fiz. 16, 911 (1972)

Sov. J. NucT. Phvs. jj/502 (1973)

METHOD

N. Ranyuk

,

ELEM. SYM. A

Ta

REF. NO.

181 73

72 De 12 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F NOX THR* 6 C 1* 6 TRK-I DST

dcr/dO ~ 1+2 v/V cos6 - P sin2 0 * ENERGIES IN GEV

Table II

Element -^max*

MeV X* o - 2r/ V O -;./i*ri

V, (MeV/

nucleon)^ e. MeV

3000 0. 1G 0.99 -0.03 1 ±0.025 0.042=0.005 0. 1 60 —0.020

38C0 0.55 0.85 0.013-0.017 0.018=0.002 0.G45—n.WS

5100 0.59 0.85 0.040±0 0I7 0.054=0.006 ('.206=0.031 700 0.93 0.45 0.155+0.017 11.091 +0.009 0.831 =0X52

1000 1.14 0.3 nu.55-0. 01 7 tl.047-C.C-55 0.229-0.02J

Bi"9 1200 0.76 0.6 0.094=0.020 ft.055-n.c-j6 r-.2i4-0.C30

1300 0.91 0.4 0.093 ±0.0 IS fi.055-C.C06 0.3; 4 — 0 C30

1480 0.62 0.S5 0.034 ±0.0! 8 C,G20=0.0C2 C.Ctu =Qa '34 350 0.007

0.0 10 450 0.100=0.010

ero 0.090 —0.Q10 645 0.87 0.55 O.GS4=O.G1S 0.044+ 0.004 0.187+0.018

700 0.1 *6 —0.010 800 0.45 0.95 0.008±0.020 Q.CC5-0.001 0.020 -0X02

Au‘” 850 0.121—0.010

SCO 4.50 0.00

1

0.I24=0.0IS 0.064 -0.005 0.400+0.041T

1000 0.95 0.4 0.101=0.017 0X90+0.010 0.C52 -*-0.005 0.262— G.C25

1300 0 87 0.4 0.094=0 017 O.C49+O.C95 0.234—0.024

14C0 0.90 0.5 0.073 =0.018 G.C.'O-O 004 0.147—0.015 3000 1.34 0.15 0.122=0.017 C.G65—0.GG6 0 410 =0 0411 3800 0.7 0.65 0.093+0.17 0.048=0.005 uX23=0.C22

600 0.8 0.5 0.087=0.018 0.044+0.004 0.176-0.013

700 . 0.147+0.010

Ta' 91 1145 5.2 Q.C01 0.144=0.018 0.072+ 0.007 0.468 -0 047

1430 1.23 0.15 0.127=0.018 0 C64—0.006 C.J7C -0.037

5100 2.02 0.001 0TM00=0.02C 0.100=0.010 0.9X0=0.090

Note. X

2

is the value of x

2 per degree of freedom, wfx^Xq) is the probability of the

value of x

2

. a = 2v/V is the anisotropy coefficient, e is the fissioning-nucleus kinetic energy, v is the tissioning-nucieus velocity.

Table IH

E-rma.v '<‘V X* a - 1»/V V

',MeV

'

| MeV

nucleon)’’1

J P

6C0 n.6S 0.3 0.C87±0.0!8

1 0.044=0.014 i CM76+C.0I3 ft 153-0.035 M45 4.23 0/81

1

0. 136=0.01

:

0X63=0 007 ; O4l6=0.l;u.- c. i ro±o o.io

1 ISO 1.04 0.40 0.128=0 017 0.ft6-»=0.tC6

j 0.3i 0=0-113. c.Ctvj-o.o.jn 5100 l.bo 0.015 0.195 ±0.0 15 0.098=0.009 1 0.50.5=0 080 —0.152±0 023

N/’je. x; is the value of x

2 per degree of freedom, w(x’-x^) is the probability of the value of x

2

. a 3 2v/V is the anisotropy coefficient associated with transport velocity of

the fissioning nucleus, v is the velocity of the fissioning nucleus, V is the kinetic energy

or the fissioning nucleus, P is the anisotropy coefficient associated with angular momentum of the nucleus.

FIG. 3. Anisotropy coetficent as a function of target-ni^'Ieus atomic number. Points: O-resuIts of the present work, A-results of Kroon and Forkman ( 16

J

.

/

form N3S-418

(R EV. 7-1 4.84) USCOMM.OC 2S010-PS4 PHOTOHUCLEAR DATA SHEET 116

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
V. I. Kasilov, A.V. Mitrofanova, Yu. N. Ranyuk, P. V. Yad. Fiz. 15, 406 (1972)

Sov. J. Nucl. Phys. 1_5, 228 (197 2)

METHOD

Sorokin ELEM. SVM. A

Ta 181 73

REF. NO. 72 Ka 5 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.SPL RLY THR-999 C 600-999 TRK-I DST

G,F RLY THR-999 C 600-999 TRK-I DST

999 = 1.7 GEV

FIG. 4. Angular distributions of fragments from pholofission of

tantalum. FIG. 5. Angular distributions of fragmentation products.

»>•*

FIG. 6

FIG. 6. Yield of photofragmentation as a function of E, max .

FOBM N3S-418

(B EV. 7-1 4-S4I USCOMU.OC 26 0 1 0- P6 4 PH0T0NUCLEAR DATA SHEET 117

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
I. Kroon and B„ Forkman

Nucl. PhySo A179 , 141 (1972)

ELEM. 3YM.

Ta 181 73

METHOD REF. NO. 72 Kr 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE range TYPE RANGE

6,P ABY THR-999 C 350-999 TRK-I DST

999= 1 GEV

Bremsstrahlung energy (MeV)

Fig. 4. The tantalum, gold and lead forward-to-backward ratios as a function of brrmsstrahlung energy.

Table 1 Ratios between the number of fragments in the forward and backward directions recorded in glass detectors, Nt/N%

Element Present work Proton sandwich

from angular sandwich

experiment')

distribution') experiment*)

T« 1.29 ±0.04 Re 1.42 ±0.08 Au 1.19 ±002 1.20 ±0.01 1.45 ±0.07 Pb 1.11 ±0.02 1.13 ±0.01 1.61 ±0.15

1.26 ±0.05

*) Ratios calculated from the angular distributions at 700 MeV.

*) Ratios obtained with the sandwich technique, 700 MeV for Au and Pb, 800 MeV for Tb.

') From ref. *). Proton induced fission at proton energy 6b0 MeV. 9

V.A. Kon 1 shin , E. S. Matusevich, V. I. Regushevskii

,

Sov. J. Nucl. Phys. 2 , 489 (1966).

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 118

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. N. A. Skakun and N. P. Dikii

Yad. Fiz. 15, 615 (1972)

Sov. J. Nucl. Phys. 15, 341 (1972)

ELEM. SYM. A

Ta 181 73

METHOD REF. NO.

7 2 Sk 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F LFT THR-999 C 999 TRK-I dst

Fission lifetime is 3. 3xl0-1- 7 sec 999 = 1.45 GEV

</«>

/ > i j • s t ?

9 , d*| Angular distributions of fragments from photofission of tantalum: a-in the vicinity of the crystallographic (1 1 1> axis, directed at 90’ to the beam; b-in the vicinity of the crystallographic (1 1 1) axis directed

at 1 60° to the beam.

form N3S-4I8

(R EV. 7*1 4-941 USCOMM-OC 260I0-P94 PHOTONUCLEAR DATA SHEET 119

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nucl. Phys. A210, 355 (1973)

ELEM. SYM.

Ta 181 73

METHOD REF. NO.

73 Ba 20 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N NOX THR- 27 C 10- 27 BF3-I 4PI

'

30 MEAN NEUT ENERGY

X

A

Fig. 12. Experimental values of the level density parameter a0 (Fermi gas formula plus pairing correction) versus atomic number A. The continuous curve is a least-squares fit to the data of a

theoretical calculation from Newton 13

).

Fig. 15. Ratio atbJa9 versus atomic number A. Hefe aatn is the level density parameter taken from

the neutron resonance work of refs. ‘• 2

), and a„As the level density parameter derived from the present (y, n) work. Filled circles represent points where nuclei in the neutron resonance and in the

(y, n) experiment were the same. Open circles represent points where the respective nuclei were

approximately matched. Triangles represent points which are based on measurement of neutron mean energies at two bremsstrahlung energies only.

1

H. Baba and S. Baba, Japan Atomic

Energy Research Institute report

JAERI-1183 (1969).

2 H. Baba, Nucl. Phys. A159 , 625

(1970).

15

T.D. Newton, Can. J. Phys. 34 , 804 (1956).

(over)

FORM N3S-418

(R EV. 7-1 4- 44) USC OMM-OC 26010-P04 PHOTONUCLEAR DATA SHEET 120

U.S. DEPARTMENT OF COMMERCE

NATIONAL 8UREAUOF STANDARDS
Table 3 (.continued)

Target N

(residual nucleus) *)

Goodness

of fit ") no with

p.c. p.c.

£.(24) T

(MeV)') (MeV) 4

) (MeV 1 )')

a,». (MeV-‘) f)

Ba 75 1% F 1.16 16.5-‘ 34 Ba 15.39-l34 Ba 0.93 77 2%

78 7%

79 8%

80 11%

81 71%

La 80 100% F F 1.25 0.72 15.5- l33 La 13.76-‘ 39 La 0.89 Ce 81 89% F G 1.24 0.70 17.0-l39Ce 17.8 -l *‘Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 n.O-^Pr 17.05-“2 Pr 1.00 Tb *) 93 100% 1.15 19.3-l38Tb 2I.85-l6 °Tb 1.14 Dy •) 93 2% 1.06 20.9-l6li Dy 21.9 -lS2 Dy 1.05 94 19%

95 25%

96 25%

97 28%

Ho 97 100% P G 1.06 0.56 21.4- I6 *Ho 20.66- 166 Ho 0.97 Er*) 95 2% 1.11 19.2- ,66 Er 21.9 -,66Er 1.14 97 33%

98 23%

99 27%

101 15%

Tm •) 99 100% 1.03 24.0- l48Tm 22.53-l70Tm 0.94 Ta 107 100% G 1.00 0.49 26.0- l8<>Ta 21.2 -18lTa 0.82 W 107 26% G F 0.98 0.50 27.0- 183 W 23.0 - ,83 W 0.85

108 14%

109 31%

111 1

J OC Au 117 100% G 1.19 17.5- l94 Au 20.24— 198 Au' 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-204 Pb 10.1 -207 Pb 1.35 (Z = 82) 124 23%

125 52%

Bi 125 100% F 1.65 1.03 9.0-2O8 Bi 13.8 -2l0 Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (y, n) experiments.

b

) These give an assessment of the goodness of fit of a calculated £„ versus £> curve to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

c

) Bremsstrahlung photoneutron mean energies £. for peak bremsstrahlung energy £0 = 24 MeV.

d

) Nuclear temperature from fit with constant-temperature formula.

*) Level density parameter a, derived from the present (y

,

n) experiment, using a Fermi gas formula plus pairing correction, and corresponding residual nucleus (the atomic weight shown is the weighted average of atomic weights of the respective isotopes present).

') As column 7, but using data on n-resonance absorption from refs. I>2

). •) Measurements of £„(£„) for these nuclei were made only for £0 =21, 23 and 24 MeV.

,

121
N„ V. Goncharov, A. I. Derebchinskii , 0. G. S.G. Tonapetyan, and V„M. Khvorostyan

Yad. Fiz. 17, 242 (1973)

Sov. J. Nucl. Phys. 17, 124 (1973)

METHOD

Konovalov,

EL EM. SYM. A

Ta

REF. NO.

z

181 73

73 Go 5 hmg

reaction RESULT EXCITATION SOURCE OETECTORANGLE ENERGY TYPE RANGE TYPE RANGE G.PI+ ABY 170-400 C 400 BBL-D 90

G.PI- ABY . 170-400 G 400 BBL-D 90

G.P ABY 76-400 G 400 BBL-D 90

FIG. 4. Charged pion yield vs. the mass number of the nucleus: •-

E, - 105 ± 10 MeV, O-E, =* 85 ± 10 MeV, C-E* => 65 ± 10 MeV.

FIG. 3. Energy spectra of protons, ETM3* = 400 MeV, 0|ab = (90 ± 7)°. Circles- present data, triangles- from ( la

).

18

P. Dougan, W. Stiefler, LUSY Preprint,

1001-1003. 1970.

(over)

U.S. DEPARTMENT OF COMMEPCi NATIONAL BUREAU OF STAN OAR OS form N8S-4I9

(R EV. 7-1 4-64) USCOMM.OC 20010-P64 PHOTONUCLEAR DATA SHEET 122
FIG. 5. lOMeV, •

IS MeV, ©

Proton yields vs. mass number of the nucleus: 0-Ep

= 1 00 ± -Ep

= 125 i 15 MeV. A—

E

p

= 155 i 15 MeV, C-Ep = 185 ± -E

p

« 215 ± 15 MeV.

FIG. 6. Pion yield (1), proton yield (2), and summary pion and

proton yield (3) vs. the mass number of the nucleus.

123
E„ Hayward, W. Phys. Kev* C8 ,

METHOO

C. Barber, and Jed

1065 (1973)

Sazama

EL EM. SYM.

Ta 181 73

REF. NO.

73 Ha 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

$ G.G RLY 15 D 15 NAI-D 90

(15.1) (15.1)

POLARIZED PHOTONS

TABLE n. Results.

dJ'/dto, d<J±/daF Target Arbitrary units V V rAD CM)

Cd 0.042 ±0.028 0.39± 0.05 0.11 ±0.07 0.09 ±0.07 0.19 Sn 0.084±0.036 0.65±0.06 0.13 ±0.06 0.11 ±0.06 0.07 Ta 0.24 ±0.10 1.47 ±0.14 0.16 ± 0.07 0.14 ±0.07 0.20 W 0.52 ±0.10 1.66± 0.12 0.31 ±0.07 0.29 ±0.07 0.20 Pt 0.23 ±0.08 1.94 ±0.13 0.12 ±0.04 0.10 ±0.04 0.08 Au 0.39± 0.11 2.08 ± 0.15 0.19±0.06 0.17 ± 0.06 0.07 BI 0.10 ±0.15 2.65 ±0.26 0.04± 0.06 0.02 ±0.06 0

/

FORM NSS-418

(REV. 7.1 4- 84) USC OMM*N BS«0 C PHOTONUCLEAR DATA SHEET 124

' U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
R. S. Hicks and B. M. Spicer

Aust. J. Phys. _26^, 585 (1973)

ELEM. SYM.

Ta 181 73

METHOP REF. NO.

73 Hi 6 egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABX 7- 29 G 7- 29 BF3-I 4 PI

Fig. 1

. —Comparison of (a) the present results with ( b) those of Ishkhanov

et al. (1969) for the cross section for photoneutron production in Isl Ta.

Fig. 3.—Multiplicity corrected l **Ta photoneutron cross section as derived using the VBPL technique with analysis bin widths close to 1 -5 times the Thies

(1961) optimum value. The full curve represents the DCM predicted form, an

incoherent sum of calculations by Arenhovel (1965) and Ligensa et al. (1966)

for the El and E2 giant resonances respectively. The dashed curve is an extrapolation of the predicted dipole resonance.

(over)

FORM N3S-418

<R EV. 7-1 4-641 USC OMM-N 8 S-O C PHOTONUCLEAR DATA SHEET 125

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ta (y, n) + (y, np) + (y, 2n) + (y,3n)

Fig. 4.—Multiplicity corrected l *'Ta photoneutron cross section obtained by

a re-analysis of the data with bin widths close to the Thies (1961) optimum bin

in order to examine the possibility of extensive fine structure within the dipole resonance.

Arenhovel, H. (1965). -Dissertation, University of Frankfurt am Main.

Ishkhanov, B. S. , Kapitonov, I.M., Lazutin, E. V. , Piskarev, I. M. , and

Shevchenko, 0. P. (1969). -Sov. Phys. JETP Lett._10, 51. Ligensa, R. , Greiner, W. , and Danos, M. (1966 ). -Phys. Rev. Lett. 1£, 363.

Thies, H. H. (1961).- Aust. J. Phys. 14, 174.

126
A. Suzuki, K. Shoda, M. Sugawara, T.

S. Oikawa, and J. Uegakl

PIGNS-73, Vol. I, p. 195 Asilomar

METHOP

Saito, H. Miyase, ELEM. SYM.

Ta 181

REF. NO.

73

73 Su 10 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE 2,P RLY 5- 20 D 15- 20 MAG-D 125

Fig 2 ,81 Ta(e.ep) &=i253*

62<£p<7.0 Mev

t

Jt l^H 1) f

:r+r

7.0<£p<80 ,

i

’ 8X£p<90 90<Ep<lOO

18 8Mevl t

; J+frt wH

J > '

* >

f

T

•

i 10.0 <EP< 11.0 llX5<Ep<12 0

, I ,4 4 ..

16 17 18 19 20 16 17 18 19 20 INCIDENT ELECTRON ENERGY ( Mev)

Fig 3

lS, Ta(II)

,69 Tm (I)

/

fORM N3S-418

<R EV. 7*1 4* 64) USCOMM-NB3-OC PHOTONUCLEAR DATA SHEET 127

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. A„ Suzuki, K. Shoda, M Sugawara, T. Salto, H.

J„ Uegaki, M. N. Thompson, K.J. F. Allen, H. J. PIGNS-73, Vol„ I , p„ 197 Asilomar

Miyase, S. Olkawa,

A skin, B.N. Sung ELEM. SVM. A Z

METHOD

Ta

REF. NO.

181 73

73 Su 11 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,P RLY 5- 22 D 18- 22 MAG-D 90

?S1 Ta (£.£>) PflCTOH S®€CT®UM

£*• , 77.C 0 » 90* £

e»wo. 5 M^

E»«195 m»v

£»*> 9 0 Mev

A » '

Ep

Eo

Eo

E* i >80

5 7 9 n 13 15 fM»»> Fig .1

Pig 2

ia, Ta(e>p) 9s 90* d

O 6.2<Ep<15i Hn j

a 3 '<Ep< 96 / o ll. 0 <£o<1 Z0 /

.d’

ia 19 20 21 22 Ep(M»»)

proton energy oi5iRia/noN PROM 200 Mev RESONANCE STATE

PROTON EnEROY ( M»v

)

C 9 A ground

J J J J

9 8 4 2 0 ENERGY OF RE51GUAI. STATE (Nw.)

Fig. 2

,/

form N 3S-418 (REV. 7o1 4-64) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 128

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
p. Of? vie" J. Deb.rus, F. Lubke, H MomtuFeu, R. Schoenmackers

,

and G. Ste'n

Nv-1 , P’nys

A

22i , 145 (1974)

El EM. SYM. Ta 181 73

74 Da 2 egf

REACTION result EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,A ABY 10-450 C 450 TEL-D 90

Data measured for p,t, and He3, but not given in paper.

Fig. 8. The position of maxima of the (•/, a) spectra and the width of the spectra at half height. The broken line gives the height of the Coulomb barrier.

/

PORM N3S-418

(P EV. 7-1 4-64) USC OMM-N 8S-OC PHOTONUCLEAR DATA SHEET 129

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOARDS
REF. ELEM. SVM. | A H.E. Jackson, G.E. Thomas, and K.J. Wetzel

Phys. Rev. C£, 1153 (1974) Ta 181 73

METHOD REF. NO.

74 Ja 2 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G ABX 10 D 10 SCD-D 90

(10.83) (10.83)

TABLE I. Differential cross sections measured for

elastic and inelastic scattering of 10.83-MeV photons.

State or states populated by inelastic scattering are

indicated in parentheses below the target. The errors

given result from the statistical error in the measurement of the cross section relative to the calibration

value, the 90° uranium inelastic cross section.

0 da/dui (elastic) do/du (inelastic) Nucleus (deg) (mb/sr) (mb/sr)

23«U

(2

+

, 45 keV) 20 1.72 ±0.17

30 0.97 ±0.12

50 0.334 ±0.039

60 0.23 ±0.04

70 0.245 ±0.024 0.136 ±0.015

90 0.182 ±0.017 0.154 ±0.012

120 0.189 ±0.017 0.160 ±0.013

232 Th

150 0.303 ±0.016 0.160 ±0.015

(2+

, 45 keV) 90 0.129 ±0.015 0.103 ±0.007 Pb 20 1.28 ±0.12

30 0.55 ±0.07

50 0.289 ±0,051

60 0.20 ±0.04

70 0.087 ±0.014

90 0.079 ±0.005

120 0.060 ±0.004

150 0.127 ±0.008

209BI(f, 910 keV) 90 0.101 ±0.0062 ~ 0 "'Ta <f , 13G keV) 90 0.0370± 0.003 0.006 56 ±0.0015

l59 1t, (|

+

, 58 keV)

90 0.0314 ±0.003 0.0110 ±0.0016

138 keV) 0.00511 xO.OOll

TABLE m. Comparison of calculated and observed

values of the 90° cross sections for elastic scattering and of the. ratio at 90° of Raman to elastic scattering by

various nuclei for 10.83-MeV photons. The parameters

used in the calculations are given in Table n.

dathi (90°)/dn (mb/sr)

Target Calc Exp Calc Exp

Tb 0.036 0.031 ±0.003 0.80 0.51 ±0.06 Ta 0.055 0.037± 0.003 0.28 0.18± 0.04 Pb 0.076 0.079± 0.005 0 Bi 0.101 ±0.006 0 ~0

Th 0.128 0.129± 0.015 0.91 0.80 ± 0.08 U 0.157 1 9.182 ± 0.017 1.03 0.85 ± 0.08

a If the Livermore parameters (Ref. 33) for 235U are used then this calculated value would be 0.210 mb/sr.

33

C.D. Bowman, G.F. Auchampauch, and

S.C. Fultz, Phys. Rev. 133 , B676 (1964).

,/

form N3S-418

(R EV . 7-1 4»$4) USC OMMoQC 26010-P64 PHOTONUCLEAR DATA SHEET 130

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

I
S. Kahane and R. Moreh

Phys. Rev. C9, 2384 (1974)

(See also 73Mol3)

EL EM. SYM.

Ta 181 73

method REF. NO. 74 Ka 9 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.G ABX 8

00 Q SCD-D DST

Differential cross sections for elastic scattering of 7.9-MeV photons from lsl Ta have been measured at angles ranging from 25 to 140°. These results and previously measured differential cross sections from a8U and 232 Th are compared with theoretical predictions taking

into account Rayleigh scattering, nuclear Thomson scattering, nuclear resonance scattering. 8=7 . 9 MEV

and Delbruck scattering. It is shown that at this energy the forward, elastic scattering at angles £75° is due almost entirely to Delbruck scattering. The experimental results were

found to deviate systematically from predicted values throughout most of the angular range. A striking agreement with theory was obtained only after excluding the contribution of the real part of the Delbruck scattering amplitude.

SCATTERING ANGLE (deg)

FIG. 4. Differential elastic scattering cross secr.o

- -

for 7.9-MeV photons from 18, Ta. The solid curve rep- resents the calculated values obtained by including :hc amplitudes of Thomson, Rayleigh, nuclear resonance, and Delbruck scatterings. The dashed curve represen-*

the result obtained after excluding the real Delbruck amplitudes while the dash-dot curve represents the result obtained by including nuclear resonance and Thomson scattering only. The incoherent contribution is in- cluded in all calculations.

/

TABLE I. Measured differential cross sections

(pb/sr) for elastic scattering from a

18t Ta target at various angles. The calculated cross sections include

the contributions of all scattering processes with and

without the real part of the Delbruck scattering amplitude.

Calculated Angle

(deg) Experiment

Without

real With

real

25 195 ±50 190 290 35 82 ±20 62 110 45 26 ± 7 25 48

60 9.7± 3.5 9.3 19

75 4.9 ± 1.5 4.8 8.5 90 2.6 ± 1.1 2.9 3.8 120 2.0± 0.9 2.1 0.76 140 2.2 ± 1.1 2.2 0.51

FORM N3S-418

(R E V. 7* 1 4-04) USC OMM-N 8S-OC

FIG. 5. Differential elastic scattering cross sections for 7.9-MeV photons from and 238U. The solid curve represents the calculated values obtained by including the amplitudes of Thomson, Rayleigh, nuclear resonance, and Del- bruck scatterings. The dashed curve represents the result obtained after excluding the real Delbruck amplitudes while

the dash-dot curve represents the result obtained by including nuclear resonance and Thomson scattering only.

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 131
REF. L.E. Lazareva, A. I. Lepestkin, and V.I.

Yado Fiz. 20, 242 (1974)

Sov. J. Nucl. Phys. 20, 128 (1975)

METHOD

Sidorov

ELEM. SYM. A Z

Ta

REF. NO.

181 73

74 La 5 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, XN SPC 8- 29 C 29 EMU-D DST

(28.5)

w & ss so io oz too m ns *

FIG. 2. Assy metry coefficients c/a obtained for nuclei with various Z in the following studies: ref. 10-Iiy max = 25.5 McV, E n > 7.4 McV (*); ref. 1 1 -Ey max “ 27-32 MeV, En > ~5 MeV (•): ref. 12-

Ey max = 34 Me\ . ~-8 MeV (a); ref. 1 3 'Ey max = 55 MeV,

E n > ~5 MeV (X >: present work-Ey max = 28.5 MeV, Ep > 5 MeV

(->). I be smooth : ..ne shows the coefficient b/a characterizing the photoneutron angular distribution anisotropy as a function of atomic number Z. (This has been converted from the curve given in ref. 1 1 and

and is for the distribution I(i>) = a + b sin 21? + c cos i), normalized at the

points Z = 82-8? i

^J.W. Jury, J.S. Hewitt, K.G. McNeill,

Can. J. Phys. 46, 1823 (1968).

12

F. R. Allum, T.W. Quirk, B.M. Spicer,

Nucl. Phys. 53, 545 (1964).

13

G. C. Reinhardt and W.D. Whitehead,

Nucl. Phys. 30, 201 (1962).

> -C z

1

3 > J *

" 3 5 J

?>7

r.

u

, r>r^v_

r

• - '

L . “

L 4 4 . —r ’ X- •V

- -

-

i ,

- i

,

i

i { ; ,

i i

:

[ N t r i\

»

[ PVa

> i i i 1 1 1 1

. r /^^Nc »_l • A / XiK.

i : u* i I i

FIG. 1. Angular distributions of photoneutrons obtained in irradia- tion of Rh. Ta. An. and Bi samples by bremsstrahlung with maximum

energy Ey ma >, = 28.5 MeV. The curves were calculated from the ex-

• perimental points by the method of least squares for a distribution of

the form I(i5) = a + bsin :

i) + c cos d and normalized (a = I ). For comparison we have shown below the angular distributions of photoneutrons with energy E n > 8 MeV obtained in irradiation of the same

samples by bremsstrahlung with Ey max = 20 MeV.

tzc

o, jeg i//

(over)

form N3S-418

(R EV. 7-1 4-04) USC OMM-OC 26 01 0- PC

4

PHOTONUCLEAR DATA SHEET 132

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
FIG. 3. Photoneutron energy spectra from Rh. Ta. Au. and Bt for ir- radiation of the samples by bremsstrahlung with maximum energy by max = -0 (dashed line) and 23.5 (solid line) MeV (Jr angles 0 with maximum neutron yield. For each nucleus the histograms given for By max ' -0 and 38.5 MeV have been combined in the interval Fn = 4-4 5 MeV.

133
R.R, Whitney, I. Sick, J.R. Ficenec, R. D. Kephart, and REF- W.P. Trower

Phys. Rev. G9, 2230 (1974)

EL. EM. SYM.

Ta 181

REF. NO.

74 Wh 3

73

hmg

REACTION

E,E/

RESULT

ABX

EXCITATION ENEROY

0-300

SOURCE

500

OETECTOR

MAG-D 60

See further analysis of this data in reference 79Zil

QUASIELASTIC SCAT

E' (MeV)

FIG. 1. The measured quasieiastic peaks; the errors on the data points do not include an over-all 3% normalization

uncertainty. The solid curve is a fit by the Fermi-gas model which yielded kF (in MeV/c) and e (in MeV) as follows:

(a) 6 U (169, 17); <b)

,2 C (221, 25); (c)

24 Mg (235, 32); (d)

40Ca (249, 33); (e) M- 7 Ni (260, 36); (f) 89Y (254 L

39); (g)

11,,7 Sm (260, 42); (h) 181 Ta (265, 42)-; (i) 208 Pb (265, 44). .The fittirig uncertainty in kF

is ±5 MeV/c and in ? it is ±3

MeV. The small-amplitude dashed curve is the s-wave ^-production contribution, the dot-dashed curve is the isobar

excitation, and the large-amplitude dashed curve is the total result.

,/

FORM NS$°418

(R EV. 7«1 4-64) USCOMM.OC 200t0.P64

(over)

U.Sc DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF ST AMQ4RDS PHOTONUCLEAR DATA SHEET 134
TAUl.r.

I.

Prolon-norm.ill7.oiJ

anil

railiattvc-eorrccloil

cross

sections

d

2

a/iIUdi:'

=

(Af±

&N)x

1<T"

In

mb/ar

MeV,

for

£

=500

MeV

nnd 0

=60*.

fc x o x in X X X X X X X X X X X X X X X X X X X X X X X X X

JO « X X X X X X X rr rr X X _ X C* c o X X Cp ao o pH a o c* pH X Cl X X X X X X X X X X X X X X X X X X X X rr rr < o’ o’ o’ o o o o o’ o o o’ o o' o d o’ o o o' o o o o o o o o’ o o o o* d

rr •M* H* rr rr c- o X X o _ Cl X X o X X o X X o o ao X pH Cl o X X x . C- CM X c- o X o X X PH o rr X o X o Ci • c* X CP X o *T Cl ao Cp pH Cl

•

c-’ Cl 09 * CM n n rr X X c- o’ o X X X X cb o o CO d CO X X X X rr X X X X*

2 x in m X in in in X X X X X X X X X X X X X X X X X X X X X X X X X X

7i X o rr o X X o rr c- X X X X o o c X CO rr X X rr X ao ao o o X ao c X o pH |H rH lH rH X X X X Cl X X X X X X X X X X X X X X X X X X X X

5 < © o’ o o o’ o o’ d o o’ o’ o’ o' o o o o’ o o o o o’ o o o o o o o' o o d o’ 2 ci o rr o c- X rr X X X X X o o o X c rr X pH ao X X X CP X X Cp X GO Cp

• o in c- c- M* rH rr X X X X X X o Ci X X rr Ci o rH X Ci X CO X X X X rr X X

fc» r-4 pH CM X X •M* rr X X X o’ o o o o o o d CO o X rr X rr rr rr rf rr X X X

s X in m m X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X

a o ci o X rT X c- ao r> o X _ Ci c X c- Ch o X X X CO ao ao Cl o o X X rr Ji cp o o o pH pH PT pH PH pp pH Cl X X X pH pH PH pH pH pH pH pH pH pH pH rH pH X X X X X

-• <3 o’ o’ o o d o o o o o’ o o d o o o' o o o o o’ o’ d o o o o o o o o o o o'

CM m X c- c* X o o X X X X rr c X o X X X rr X X rr X o X rr Cp X X X X rr X

2: X X X X X *C X Cl X X X X X X X c X X X X o tp X p^ CP Cl ao Cl o Cp X X rr X X X X n X rr rr rr X X X X rr rr rr rr rr rr X X X X X X X X X X X X

5 x x x m m in in X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X

ci c* x x x X X X X rr X X X X o o o X rr rr X X X X X rT X rr rr X X CP ao o

> < PH M* X o o o o o o pH pH pH pp pp pp pH pH PH pH PH PH pH pH pH pH pH pH pH pH pH pH pH pH pH PH pH X

< o* o o’ © © o’ o' o o o o d o’ o’ o o' o d d o o' d o o’ o o o’ o o o o o o o o o o’ x X Cp X n o X X rr Cl rr X X X X X c- pH X o rr c- X CP rr rr Cl ao CP 2; c- X o o o x X X X o X rr X o o PH X o o o X rr X pH o o o X Cl X PH X X X X Cp x X — •“* Cl X X X x’ X " •5* rr rr -*3* rr rr X X X X X X X X X X X X X X X X

C x x x a x x X X X X X X X X X X X X X X X X X X X X X X X X X X ir> X X X X

c* ci X c- m X c- X o X X X o _ o _ o o X X c- fp pp ao ao ao Ci Cl o o X

z CM x tT o o o o o o o o o o o o o o o o o o o

< o’ O o’ o’ o o’ o o’ o o’ o’ o’ o’ o’ o’ o o o' o’ o’ d o’ d o’ o’ o' d o’ d d o' d o’ d d o’ d

X o X o Cl M X o H* X X X Cl Cl Ci X c X X X X o X c- o X o _ Cl Cp Cl rr Cl rr X Cl 2: X Cl T o ci O -* T X c- o X X X o o X X o r

r

rr X Cl o Ci ao c- X X X Cl X X X X rr X

x rr o’ X X ci ci Cl Cl Cl Cl X X X X X Cl X —

5 o x o X X X X X ts X X X X X X X X o o CO CO CO CO X X X X

in c- c- X X X o o X X X o X o o X o Cl -p X T> X X p* — CM X o o o o c o o o o o o o o rr X rr •3* *r «r X X X o

“3 <1 © o’ o’ o’ o’ d o c = « d o o’ o o o o d o o' o’ o’ d o’ o o o’

Cl o C- M Cl X X -- X X X o c- X c- X X C- X X Cl _ X

> c— X •o r- X X o X o o X X o rr X Ci o X X X X o Cp ao o

— ~ Cl X — ** ci o 00 00 ao ao ao ao Cl

s cp e => x •s o - X o o X X X X •-3 X X X X X X o CO o CO CO cr CO CO CO X X X is

Cl x c- in X X X X X L- X m X X X X X c Cl X X o ao X Cl Cl Cl

-O* — — — ' ci CJ X X X d o o o d o o o o o d X X X X X X X X X rr rr X X

<J c o o’ o o o o’ o’ o o o o d o o o o' o o o o o' o d o o o o o o o d o o’ X _ X - o X Cl X X Cl X X X c X _ c- X Cl Cp ao X X Cl X X 51 in © — ci X X c- o o — Cl X X o rr o f- d o X CP rr pH X X X o

* — Cl M n* o X c* X *“ “* - “ -1 Ci X o o 55 X X X X X X x’ Cp’

- c* o e- - •O c* o X X o X X X X - - o X o o o o o o CO o o CO CO CO CO X X X X

•X’ _ X o Cl X X X X X X o X X rr X __ X CO CO Cl _

cp o Cl Cl Cl *1 Cl X Cl Cl Cl X

-

<1 o’ © d O o' o’ <= o’ o’ d o o o o d o o’ o o o o’ d o d o’ d o’ o’ o’ o’ o' X in X o __ X Cl X X <n X X Cl - o X o rr c X CO rr X X ao Cl Cp o cp c: M CM CM m Ci Ch c- *r Cl X o o Cl o c X c Cl rT X Cl CO X -r X X ao Ci Ci T* — in -* Cl Cl X X rr X X o - o X X o’ X X rc X X Cl X X Cl X X X Cl Cl X

=S c- c- t- c- c- X 13 o o X - - - o X o o o o o o o o CO CO CO CO X X X X

X c. o c- X X X X Cl o X X X o X Cl o o o Ci Cl CO ao Cl o rr X Ip

... < r-» Cl n — in o o o PH pp — — — PH pp pp pp PH PH o o o o o d o PH PH pp PH PH <1 o’ O o o o’ o o o d £ c d o o o o o o o o o o’ o o o o o o’ o o d o’

CM Ci x X X Cl X X X o o X X o c o X o GO ao o X Cp X X ao

e» r- ci o o •-* X PH X X PT X o X X X o Ci X X X X pH o X X pH X *r o tp

CM CM in X Cl Cl X rr X C* T rr rr X X Cl Cl •"* pH pH "* pH

>

o o o O o o cn o X o X -r X o o o o o o X X -r X o c- X o c Cl X X o rr CO C-p ao Cl o X

V o’ •*r o’ TJ* o o’ o *r o rT •*r d X «H X o X X X X o X X o X X CO CO o CO CO X X X Cp’ Ip

ao x o in m r- -r X X Cl o o d X o o X X rr X X X o o c ao D- o X X -r X X o Cl - -5* *r rr rr -r rr *r -r *r T rr -r -r *r X X X X X X X X X Cl X X X Cl X X X X X

135
REF.

METHOD

V. S. Evseev, T. N. Mamedov, 0. V. Yad. Fiz. 21 , 245 (1975)

Sov. J. Nucl. Phys. 21, 129 (1975)

Selyugin

ELEM. SYM.

Ta 181 73

75 Ev 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,N SPC 7- 31 C 31 SCI-D 140

,

Neutron energy spectra have been measured in the energy range 2 <, E, <, 5 MeV for photoexcitation of

the ntttki Ta. Pb, Bi, and Th by bremsstrahlung with maximum energy 31 MeV. From the neutron spectra we hi’fe dtteonined values of the nudfl*r temperature T after emission of the first neutron: 1.01 ±0.04,

1.12 ±0lQ4, 1.11 ±0.04. and 1.25 ±0.05 MeV respectively for Ta, Pb, Bi, and Th. Comparison of the values

obtained for the nuclea* level-density parameter with the predictions of the statistical theory of nuclear

reactions shows that this theory does not describe the decay of collective nuclear states of the giant dipole

resonance type.

form N3S-4J8

(R EV . 7-1 4-64) USCOMM-NBS-DC PH0T0NUCLEAR DATA SHEET 136

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF- H. E. Jackson, G. E. Thomas, K. J. Wetzel

Phys. Rev. Cll , 1664 (1975)

ELEM. SYM.

Ta 181 73

method REF. NO.

75 Ja 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,G ABX 11 D 11 SCD-D DST

(11.387) (11.387)

TABLE I. Differential cross sections measured for

elastic and inelastic scattering of 11.39-MeV photons.

State or states populated by inelastic scattering are in- dicated in parentheses beside the target. The errors

given result from the statistical error in the measurement of the cross section relative to the calibration

value, the 90* uranium elastic cross section.

» da/dui (elastic) ekr/du (Inelastic) (deg) (mb/sr) (mb/sr)

:s'U C2*. 45 keV)

90 0.169* 0.011 0.173*0.016

150 0.355*0.041 0.236 * 0.24

23JTh (2*-, 45 keV)

150 0.331*0.035 0.210*0.022 "‘Ta (|\ 136 keV) (f , 301 keV)

90 0.073* 0.008 0.020*0.004

0.009*0.004

150 0.145* 0.015 0.017*0.004 0.017*0.004 "s Ho (-f\ 95 keV) (f. 210 keV)

150 0.141*0.014

0.022*0.004

0.013*0.004 mTb (j*. 58 keV) (f. 138 keV)

90 0.062* 0.006 0.024*0.003 0.013*0.003

150 0.134*0.012

0.042* 0.004 0.019*0.004

u, Pr

150 0.030*0.008 • . .

RATIO RAMAN/ELASTIC

TABLE IIL Comparison of calculated and observed

values of the cross sections for elastic scattering and of

the ratio of Raman to elastic scattering by various nuclei

for 11.387-MeV photons at 90 and 150*. The parameters

used in the calculations for column 5 are given in Table

II. Column 4 describes results obtained by perturbing

those parameter to meet the constraint of Eq. (3) (see

text).

d<r(0)dQ

(inb/sr) Target Calc. Exp.

9 = 150* Pr 0.025 0.030*0.008 0.0 0.0 Tb 0.094 0.134*0.012 0.53 0.57 0.46*0.04 Ho 0.170 0.141* 0.014 0.28 0.28 0.25*0.04 Ta 0.160 0.145*0.015 0.23 0.22 0.23*0.04 Th 0.253 0.331*0.035 0.59 0.63 0.64*0.08 U 0.289 0.355*0.041 0.78 0.73 0.67* 0.07

• o

II cr> Tb 0.062 0.062* 0.006 0.76 0.82 0.60* 0.07 Ta 0.109 0.074*0.008 0.32 0.30 0.38* 0.07 U 0.172 0.169* 0.008 1.29 1.15 1.03*0.10

/

form N3S-418

(REV. 7-14-64) USC OMM-N BS-0 C

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 137
REF.

METHOP

S. G. Tonapetyan, N. V. Goncharov, and V. Yad. Fiz. 22, 440 (1975)

Sov. J. Nucl. Phys. 22 , 226 (1976)

M. Khvorostyan ELEM. SYM.

Ta

REF. NO.

A Z

181 73

75 To 4 hmg

EXCITATION SOURCE DETECTOR

REACTION RESULT ANGLE ENERGY TYPE range TYPE RANGE G,PI+ ABY 150-400 C 300,400 BBL-D 90

G,PI- ABY 150-400 C 300,400 BBL-D 90

G,P ABY 86-400 C 300,400 BBL-D 90

w -

FIG. 3. Energy spectra of protons, E^iax “ 300 MeV, Slab a 90 t 7*. Points: *-2SSi, X-4^, a-i,3Nb, o-l9,Ta, a-data from

ref. 5, ’-data from ref. 5.

iff SO 70 10 so no no

£„.utv

FIG. 2. Energy spectra of *•* and r mesons. FJjP 3* * 400 MeV,

Slab = 90 i 7°. The points are the same ?s in Fig. 1.

FIG. S. Dependence of yields of »

mesons 1, protons 2, and the sum of r- meson and proton yields 4 as a function of mass number of the nucleus. The

dashed line 3 is the theory. Points: oexperimental differential cross sections

for pions of all signs, A—differential cross sections for protons emitted at the same

angle flub ’ 90°, o—combined values of

these differential cross sections. The

statistical errors are shown.

no no too too 200 220 200

f, , M«V

FIG. 4. Energy spectra of protons, - 400 MeV, 9|ab * 90 t 7*. The points are the same as in Fig. 1 ; o—data from rtf. 7.

P.C. Murray et al. , Phys. Rev. 9£, 764 (54)

°C . Lev inthal et al., Phys. Rev. 82, 822 (51)

P.Dougan et al. , LUSY Preprint 1002 (70). woo 100 zoos LEAR DATA SHEET 138

NATIONAL BUREAU OF STANDARDS
REF. H. Bartsch, K. Huber, U. Kneissl, H. Krieger

Nucl. Phys. A256, 243 (1976)

ELEM. SYM.

Ta 181 73

METHOO REF. NO. 76 Ba 1 egf

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,3N RLY THR-UKN C UKN SCD-D 4PI

ISOMER RATIO

Tabu 1 Experimental and theoretical results

Process Target*

spin

^7

(keV)

Ti

Spin

high

Spin low

D "G\mm SCOP (»)

“lTa(y, 3n) i

93 2.2 h

7- 1 + 0.51 ±0.09 3.6 ±0.2

9.31 min

8.15 h

,42Nd(y, n) 0* 755 63 s V 0.055 ±0.006 2.20 ±0.06

1100-1300, 2.5 h 0.19 ±0.01*)

145

*2 Mo(y, n) 0* 6519 66 s r *- 1.03 ±0.21 5.03 ±0.75

1208. 1508, 15.49 min 0.85 ±0.07 ») 4 15

1581, 1637 1.92 ±0.15 )

‘•°Mo(y, n) 0 97.3 16.8 fit r 0.85 ±0.24 1.72±0.25

140.5 66.02 h

l9,Pd(y, n) 0* 214.5 22s t* 0.5 ±0.2 3.4 ±0.5

115 850 ns

ll0Pd(y, n) 0* 188 4.7 min * 0.11 ±0.02 3.14±0.15

113 390 ns i + 0.41 ±0.09 3.0 ±0.25

87.7 13.47 h i* i* 3.2 ±0.7 3.3 ±0.4

**Y(y. n) i- 231.7 14.2 ms 8* 0.056 ±0.008

442.3

392.5 300 ms

*) Ref. ,4). •) Ref. •*). 14

P.E. Haustein et al., J. Inorg. Nucl. Chem. _33.' 289 (1971)

^J.H. Carver et al., Nucl. Phys. 37 , 449 (1962)

form N3S-418

(R EV. 7-1 4-64) USCOMM-N0S-OC

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 139
REF. V. Emma, S. Lo Nigro, C„ Milone

Nucl. Phys. A257, 438 (1976)

ELEM. SYM.

Ta 181 73

REF. NO.

76 Em 2 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F ABY THR-999 C 999 TRK-I 4PI

Table 1 Measured values of<r, at £ = 1000 MeV and deduced values of a* assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z

l IA <*q (mb)

£o (MeV)

ITk (mb)

Bi 32.96 12.3 ±0.6 200 7.6 -0.6 Pb 32.45 5.4 ±0.4 220 3.6 ±0.3

T1 3110 4.1 ±0.3 230 2.8 -0.3 Au 31.68 2.0±0.15 240 1.4 -0.2

pt 31.18 1.1 ±0.08 255 iS — 0.7) x 10" 1 Re 30.21 (3.7 ±0.3) x 10- 1 280 l2.9-0.3lx 10

-1 W 29.78 (3.5 ±0.3) x 10* 1 290 1 2.8 ±0.3) x 10" 1 Ta 29.45 (33 ±0.3) x 10- 1 300 (2.7-0.3)x 10' 1 Hf 29.04 (1.7 ±0.2) x 10" 1 310 1 1.4 —0.2) x 10“ 1 Yb 28.31 (1.3±0.1)x 10-* 330 1 1.2 ±0.1) x 10* 1 Tra 28.18 (7.5 ±0.8) x 10 -2 335 (6.8 -0.8) x 10" 2 Ho 27.21 (3.6 ±0.4) x I0 -2 355 i3.5r0.4)x 10" 2 Dy 26.80 (2.6 ±0.3) x 10' 2 360 1 2.5 — 0.3) x 10~ 2 Tb 26.58 (2.5 ±0.3) x 10' 2 370 (2.5 -0.3)x 10" 2 Gd 26.04 (1.6±0.2)x JO' 2 3S0 1 1.7 — 0.2) x 10" 2 Sm 25.56 (1.3 ±0.2) x 10' 2 390 ( 1.4x0.2) x 10* 2 Nd 24.96 (9.2 ±0.9) x 10- 3 405 (1 — 0.1) x 10 -2 Ce 24.00 (8 ±0.9) x 10 -3 420 (9 +1 ) x 10" 3 La 23.39 (8.4 ±0.9) x 10* 3 430 (1 ±0.1) x 10” 3 Sb 21.36 (1.2 ±0.2) x 10' 2 460 ( 1.5- 0.3) x 10- 2 Te 21.19 (8.3 ± 1 ) x 10~ 3 465 1 1.2 x0.2) x 10~ 2 Sn 21.06 (1.3 ±0.2) x 10' 2 465 1 1.7 ±0.3) x 10" 2 Cd 20.49 (1.7 ±0.3) x 10~ 2 470 (2.2 ±0.4) x 10~ 2 Ag 20.47 (2 ±0.3)x 10" 2 470 (2.6±0.4)x 10- 2 Zn 13.76 (2 ±0.4) x 10" 1 515 (3 ±0.6) x 10 _l Cu 13.44 (2.4 ±0.5) x 10~ 1 515 I3.6±0.8)x 10- 1 Ni 13.35 (2.4 ±0.5) x 10" 1 510 (3.6 —0.8) x 10- 1 Fe 12.10 (3 ±0.6) x 10-' 510 |4.4±0.9) x 10- 1

/

Fig. 2. Nuclear fissiiities as a function of Z

1j.\. Experimental points: solid circles represent our data:

squares, the data from ref. *); open circles, the data from ref.

7

); and crosses, the data from (p, f) experi- ments20

). The straight line is the best fit calculated from our data for Z

2

,'.-l > 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

). form N3S-4I8

(R EV. 7-1 4-64) USC OMM-NBS-DC

4

A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6_, 512 (1968) .

*7 T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

12

j.R. Nix et al., Nucl. Phys.

81, 61 (1966)

.

If) ... n.A. Perifilov et al., JETP

(Sov. Phys . ) 14 , 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol. 2 (IAEA) Vienna,

1965, p.283.

PHOTONUCLEAR DATA SHEET 140

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref.

METHOD

G. M. Gurevich, L. E. Lazareva, V. G. B. Solodukhov

JETP Lett. 23, 370 (1976)

Pis'ma Zh. EFsp. Teor. Fiz. 23, 411

M. Mazur and EL EM. SYM. A

0 976) Ta

REF. NO.

181

z

73

76 Gu 5 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

G,MU-T ABX 8- 21 C 35 NAI-D 4PI

We measured the total cross section for the absorption of rays in the region of £1

resonance for the nuclei “5 Ho, l7, Hf, ,MHf. "l Ta, '”W. '"Au, and **Bi. The

singularity in the behavior of the resonance widths, observed in the region

160< A < 185, is apparently due to the influence of the neutron subshell N = 108.

FIG. 2. Widths r of £1 giant resonance in the region of nuclei with A > 150

according to the data of Saclay (•), Livermore (A), and the Institute of Nuclear

Research of the USSR Academy of Sciences (O). The crosses mark the deforma'

tion parameters 0.

,/

FIG. 1. Total photoabsorption cross sections for the nuclei

iS5 Ho, iraHf, 180Hf, 181 Ta, l82 W,

1 ,tAu, 2M Bi.

over

wav. umwh o <_ PHOTONUCLEAR DATA SHEET 141

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANOAROS
FIG. 3. Width of Lorentz lines approximating the photoabsorption cross sections, for deformed nuclei in the region 150 < A < 185.

Nucleus mb

TtMeV

El

MeV mb

r2 MeV

El

MeV

S£l Qo

b 0

Ho-165 235 2.0 12.2 272 4.0 15.5 2.3 6. 8 ±0.8 0. 29

Hf-178 291 3.1 12.2 334 4.9 15.5 1.8 7. 5 ±0.8 0.28

Hf-180 286 3.2 12.2 324 5.1 15.3 1.8 7. 2 ±0.

8

0. 27

Ta-181 272 3.0 12.1 316 6.1 15.0 2.0 6. 8 ±0. 8 0. 26

W-182 267 3.2 11.9 303 5.6 14.8 2.0 7. 2 ±0.8 0. 26

Au-197 535 5.2 13.7 • • • • • • • • • • • • • • • • • •

Bi-209 600 4.6 13.8 • • • • • • • « • • • • • • • • • •

/

.42
REF.

METHOD

A. Suzuki and K. Shoda

Nucl. Phys. A260 , 172 (1976)

ELEM. SYM. A Z

Ta 181 73

REF. NO.

76 Su 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RAN GE TYPE RANGE

E,P ABX 12- 23 D 16- 23 MAG-D 125

Proton yields obtained by summing protons with energies above levels given in tables.

Table 1

181_ / . > Ta (e.ep)

0*125.3*

Fig. 6. Cross section of the '“Tafe, e'p) reaction. See also the caption to fig. 2.

Table 4

Parameters of the present experiment

Target Atomic

number

Purity

(%)

Thickness (mg/cm2

)

Lowest proton

energy (MeV)

Bin size (keV)Range of measurement (MeV)

1

3

*Tb 65 99.9 (natural) 14.87 4.70 100 15.0 -17.5 “•Ho 67 99.9 (natural) 11.64 4.70 100 15.5 -17.5 “»Tm 69 99 (natural) 13.40 4.70 100 15.0 -18.0

17, Lu 71 99.87 (enriched) 5.24 5.34 150 15.05-20.0 '•‘Ta 73 99.9 (natural) 6.73 6.16 200 16.0 -23.0

Table 3 Displacement energies obtained from the present data and the estimates with eqs. (20) and (21)

Target Resonance £• £, (exp) £.*) £«(<) = 0.3)») (MeV) (MeV) (MeV) (MeV)

'•*Tb 1st 15.75 ±0.1

5

15.58 16.06 15.93 2nd 16.50 ±0.1

5

15.46 “*Ho 1st 16.15±0.14 15.64 16.38 16.25 “*Tm 1st 15.76 ±0.1

3

16.20

16.76 16.63 2nd- 16.34 ±0.14 16.22

,7, Lu 1st 16.44 ±0.1

3

16.75 17.07 16.93 2nd 17.45 ±0.1

5

16.35 ‘•'Ta 1st 17.31 ±0.15 16.40 17.38 17.24

•) Estimated with eq. (20).

*) Estimated with eq. (21).

Deformation parameters of IAS <5 U* derived from the (e, e'p) result

Target Resonance IAS Parent

state Aaa-V) if (assumed)

<W)

***Tb 1st 1-1521] ground —0.008 0.31 0.30 2nd 1-1512] 875 kcV

/ —0.016 0.29

'••Ho 1st 1*1633] ground —0.023 0.30 0.28 “*Tm 1st 1*1521] ground —0.018 0.29 0.27 2nd *-[510] 565 keV —0.019 0.27

I75 Lu 1st *-[514] ground —0.010 0.28 0.27 2nd *-[503] 1420 keV —0.029 0.25

'•'Ta 1st *-[503] 670 keV —0.046 0.26 0.21

The assumed deformation parameters for the parent states <5r are also shown. ) The errors are about ±0.01. 143

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. A. Suzuki, K. Shoda, M. Sugawara, T. Saito, H. Miyase,

S. Oikawa, J. Uegaki, M.N. Thompson, K.J.F. Allen,

H.J. Askin, and B.N. Sung

Nucl. Phys. A257 , 477 (1976)

ELEM. SYM.

Ta

A

181

Z

73

METHOD REF. NO.

76 Su 3 egf

REACTION RESULT EXCITATION

EN ERGY SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

ELtE ABX 16- 28 D 16- 28 MAG-D 90

Table 1

Parameters of the (y, p) cross section of tai Ta G,P SIG DERIVED

(y.p) (y. n)

ref. “) ref. ll

)

Theory

f ^d£ (mb MeV/sr) 0.75*) jadE (mb -MeV) 9.36 b

) 2983 2470 + 350

<r.,

c) (mb) 0.42 205 170 £* (MeV) 22.7 d

) 12.30, 15.23 12.4, 15.1 <t-,(T>) ®-i(T<) 0.0020*) 0.0025*) 0.0100 d£ (MeV) 8.4*) 8.5*) 6.1

h

)

2 M.E. Toms et al., Phys. Rev. 98 , 626 (1955)

.

S. Fallieros et al.» Nucl. Phys.

A147 , 593 (1970)

.

l8l To(e,e'p) 9* 90*

*) Integrated energy region is 16.5-28 MeV.

b

) An isotropic angular distribution was assumed 1

). e

) <r_ , = J [<r/£]d£.

d

) Determined by f?g.*<Ky. p)d£/f?«. 5 Wy. p)/£]d£.

*) <r> and <r< were assumed equal to ofy, p) and <r(y, n).

f) Ref. I5

). *) £« was assumed as one-third of the lower £* plus two-thirds of the upper £* in «<y, n) (see text).

“) Calculated with eq. (2).

Ee(MeV)

Fig. 5. The (e, e'p) cross sections for four energy regions at 90°. Statistical errors are included in each symbol.

. 20-

.15 -

| .lots o

5.05 4 * / \

h

4U

Fig. 3. The (-/, p) cross section of mTa analysed by Cook’s method

from the (e.e'p) cross section shown in fig. 2.

24 26

Ex (MeV) kR DATA SHEET 144

14 16 22

—I— 28

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. T. Bar-Noy and R. Moreh

Nucl. Phys. A288, 192 (1977)

EL EM. SYM. A

Ta 181 73

method REF. NO.

77 Ba 9 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G ,G ABX 8- 12 D 8- 12 SCD-D 140

Abstract: Differential cross sections for clastic and inelastic Rama..-, scattering m

f Lu and : ,! Ta

were measured. Five photon energies between 8.5 and 11. d MeV were used and were obtained from the (n ,y) reaction on Ni and Cr using thermal neutrons. The results are compared with

calculations using a modified simple rotator model (SRM) of the giant dipcie resonance tGDR)

in which the effect of Delbriick scattering was incorporated. In general, fatr agreement between

theory and experiment is obtained. A new set of GDR parameters is extracted, based on photon

scattering data and, as expected, yield better agreem-rn’ bet-een experimental and predicted

cross sections.

Fig. j. Elastic and Raman inelastic differential cross sections for 1 ,l Ta a: 140\ The solid and dashed

lines were calculated by using GDR parameters extracted from the photoneutron, data of the Melbourne and Saclay groups (table 2). The elastic curves include contributions from Thomson, Delbriick and nuclear resonance scattering.

,/

form N3S-41I

l« *V. 7.1 4-S4I USC OMM-N 85*0 C

msr.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 145
Fig. 5. Ratios of Raman/elastic scattering cross sections at 140’ for 1,5 Lu and l,I Ta. R, and R3 refer to the first and second Raman lines (fig. 1). The GDR parameters used in calculating the nuclear resonance amplitudes are explained in the captions to figs. 3 and 4.

Table 1

Differential cross sections (in /ib/sr) of elastic and Raman inelastic scattering at 0 — 140’

t (MeV)

173 Lu i*i Ta

elastic

/o = r

Raman 1

} +

. 114 Raman 2 ¥*.251

elastic

to =* i*

Raman 1 !*. 136 Raman 2 ¥*.301

3.53 2.2±1.0 2.0±1.0 0.9±0.7 1.8±0.7 1.7 ±0.7

8.88 2.3±0.6 1. 0±0.5 0.5±0.3 1.8±0.4 1.0 ±0.3 0.5±0.3

9.00 3.5 + 1.0 0.7 ±0.2 0.7 ±0.2 2.5±0.3 I.0±0.3 0.5 ±0.3

9.72 6.2±1.1 2.4±0.7 0.7 ±0.4 7.6±1.0 1.7 ±0.7 l.Q±0.6

11.39 120 ±20 31 ±7 10 ±5 107 ±15 21 ±3 11 ±8

11.39 J ) 131 ±14 17 ±4 17 ±4

*) Experimental results of ref.

3

) (calculated for 140’ from measured values at 150 1 ).

5 H.E. Jackson, G.E. Thomas and K.J. Wetzel, Phys. Rev. Cl 1 , 1664 (1975)

/

146
R.S. Hicks, I.P. Auer, J.C. Bergstrom and H.S. Caplan

Nucl . Phys. A278, 261 (1977)

EL-v -YM.

Ta

A

131

2

73

re - . •••:.

77 Hi 2 egf

n E * c Ti Cr% EXC- J’lON scj=. : e =STECTC=

A N C L E

TY.--S E,E/ LFT | 3-30 D 79-118 MAG-D DST

Abstract: The giant resonance r scattering, with primary *el< employed to separate the r polarity and strength assign andSteinwedel-Jensen mode

i egion of ,sl Ta has been investigated b; ectron energies of 79.1 to IIS. 3 MeV. .- neasured spectrum into nine different re ments were deduced using DWBA analy

Is. In addition to the well-known giant dip

r

means of inelastic electron

V peak-fitting procedure was

sonance components. Multisis with the Goldhaber-Teller

were identified at 23.2 ±0.3 McV (E2). 9.5 ±0.2 and i 1 .5 ±0.2 MeV (E2

aleor

structure,

E0). 19 5

other - 0.8resonances McV (E3). — 3.70 ±0.14 MeV (E3 or E4). and 5.40 ±0.1 5 MeV (E4 or E5). The model dependence of the analysis

is discussed.

Hg. 5 Three spectra after subtraction of the mean fitted backgrounds. At low momentum transfer the

dipole structure dominates the measured cross section, however, beginning with resonances centred

at 9 5, 1 1 .5 and 23 2 MeV. the importance of the other peaks grows with increasing q. In the determination

of the errors in the peak parameters the uncertainty in the background was taken into account.

(over)

i3:V;f|T jr or V >'Jr

: . - T - C -- V A -s Pi-:^.Tnv;nri paj? hat* ^ippt ^47
Results of DWBA analysis

E EX A' 3 r EL A T

Analysis / "•') R,_

b

) B(EL) FVVSR

VVeisskupi (MeV) (MeV) (MeV) mode! J

) (fm) (e2 fm 2,-) c) Is.p u

•

3 70 -0.14 20.9 1.39 + 0.23 ( E3 >

13 ) 0 GT 0.80 6.4 (6.7 ± 3.0) x 1

0

4 3.0 f i s ( K

( F4) “) 0 GT 0.94 8.0 (2.6 * l.4)xI0’ i i • t. Md

(E2) 0 GT 0.85 *.4 • 9.2 ~ 3.4) x i O' ; 0

1 '•

5.40 — 0.15 30.5 1.38+0.65 (E4i ,! ) 0 GT o.xo 6.8 { : 4ft - ft ^ tn° 0.8* 0,2 ! (F5) J

) 0 GT 0.92 8.-1 (7.6 ± 1.3) x 10

s 4 r i 19.0 (F2) 0 GT 0.85 6.4 (1.9 ± 0.5) x 10- 1.5- 0.4 O

'"'

9.54 4-0.20 54.0 2.07 ±0.35 n GT 0.80 6.0 (5.8 ± 3.2) x !0 : 8-4 1 6

(EG) 0 HBM 0.80 7.1 ( 1 .20 ± 0.65) x 10J

| T . 11.47*0.22 64.9 3.3 3 + 0.55 F2 0 GT 0.80 6.0 ( 1 .34 ± 0.50) x 1 o

' V' .u

(E0) 0 HBM 0.80 7.1 (3.0 ± l.0)xl()-' 40

(9 54, ! ! .47) 61.6 E2 0 GT 0.80 6.0 (l.y2+ 0.60) x !0 J 30 ± 9 5.3 (E0) 0 HBM O.SO 7.1 (4.2 ± 1 .2) x 10

'

53 ±15

12.40 70.1 2.33 F.l ! GT 1.00 8.1 26.0 4-13.1 56 ±22 4.2 SJ 1.15 7.8 22.0 ±13.2 47 ±22 3.6 15.32 S6.7 4.23 FI 1 GT 1 0Q 6.6 61.0 ;r 18.7 119 -32 7.1 SJ 1.15 6.3 54.0 ±25.1 105 -43 6.3

(12.40, 15.32) 81.1 F.l 1 GT 1.00 87.0 ±22.8 1 7 5 ± 39 1 1.3 SJ 1.15 76.0 ±28.3 1 5 3 ±48 9.9

i 9.5 + 0.S 110.3 6.0 ±1.5 E3 0 GT O.SO 6.4 (5.2 ± 3.3) xIO4 12 ± 8 2.9 23.2 ±0.3 131.2 7.0 ±1.2 E2 I GT 0.73 5.5 (9.2 ± 2.5) x 10 2 20 r 5 2.5 SJ 0.S7 (8.5 ± 2.3) x 10 2 18 ± 5 2.3 30.0 ±3.0 170 8!£ (E4) 4

) 0 GT 0.80 6.8 (4.7 ± 2.2) x 10" 15 ±7 5.5 (E2) I CT 0.73 5.5 (1.1 + 0.6) x 10 2 3 ± 2 0.3

’) Indicated analysis models are Goldhaber-Teller. Steinwedcl-Jensen, and hydrodynamic breathing mode.

") Uncertainties in /and /?, are approximately 5

') Unit fbr the monopole matrix element. i.V// 2

, is c

2 • fm4

. J

) For resonances containing possible E2 admixture, tabulated non-E2 strengths represent means of fits with and without quadrupolc contributions.

C

1 For FI transitions the ratio /'is relative to ground-state semi-major or semi-minor radius; for all other transitions/refers to the averagcd-ovcr-oricatation radius.

:

i ;. 6 Differential cross sections tor I IS. 3 .MeV electrons ineiastically scattering from the 12.4 and

1 5 3 \leV' components of the GDR of 18 *Ta. The data points from measurements with 79. 1 and 102.0 MeV

electrons have been repositioned as described in the text. The continuous and dashed curves were 148

computed in DVVliA usmg the Goldhaber-Teller (/ = 1.00) and Steinwedal-Jensen (/-= 1.15) models.
H, Miura and Y. Torizuka EL EM. SYM. A z Phys. Rev. C

J_6, 1688 (1977)

Ta 181 73 , METHOD ’ " REF. NO.

77 Mi 8 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

E,E/ FMF 8- 30 D 150-250 MAG-D -DSL

A new resonance peak has been found at 14.7 ± 0.2 MeV in spectra of inelastic electrons scattered from mTa. The peak exhausts a significant part of the £0 sum rule and is characterized by a narrow width of about 2.1 MeV. The giant quadrupole resonances splits into two peaks at 9.5 ± 0.2 ar.d 11.3 z 0.2 MeV

which deplete (29 z 5)<To and (63 ± 8)% of the isoscalar £2 energy-weighted sum rule, respectively.

G-WIDTH,B(EL) ,J-PI

FIG. 1. Spectra of inelastic electrons scattered from

l:i Ta. The radiation tail was subtracted by the calculation. Solid curves represent the giant dipole resonance

and underlying background.

,/

FIG. 2. After the subtraction of the GDR and underlying background the remaining cross section is displayed. The overlapping peaks were decomposed into 9.5-,

11. 3-, and 12. 6-MeV components and 14.7-MeV peal; by

a n

2 fitting procedure. Arrows indicate the quadrupole

A'=0, 1, and 2 states at 9.-1, 9.8, and 10.8 MeV, respectively, calculated trom the dipole energies.

TABLE I. Line width F, B(EL) values, and percentages oi the EWSll in ‘"‘Til.

r B

!

£2 1

)

B (£01

)

EWSlt (MeV) J' Mode (MeV) (/- fm 4

) (fm4

) (i)

9.5 ± 0.2 2* r = o 1.8 t 0.C 2147 = 334 29 i 5 11.3 =fc 0.2 2* T = 0 2.2 * 0.7 3975 ± 482 63 * 8 12.6 ± 0.2 o* T= 0 1.3 i. 0.8 634 = 231 lit 5

14.7 * 0.2 0* T-'O 2.1 t 0.3 4543 ± 371 o 4< 00 or 2* r=

o

1971 i 162 41*4

00 l o

2* r= i 3229= 194 74 ± 6

FORM N3S-41I

(REV. 7-1 fcHI USC OMM-N SS*0 C PHOTONUCLEAR DATA SHEET 149

U.S. DEPARTMENT Or COMMERCE

NATIONAL SUREAUOF STANDARDS
ref. a - v - Mitrofanova, V.I. Noga, A. I . Popov, Yu.N. Ranyuk and

Yu.N. Telegin

Yad. Fiz. 25, 926 (1977)

Sov. J. NucT. Phys. 25, 493 (1977)

EL EM. SYM.

Ta

A

181

Z

73

METHOD REF. NO.

77 Mi 11 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,SPL ABY THR-999 C 600-999 ACT1

4PI

The induced activity method has been used to measure the yields of 15 photonuclear reactions in tantalum 999 = 1 . 3 GEV

and tungsten nuclei in the photon energy range 600-1300 MeV. The cross sections have been calculated

in the approximation of a rectangular bremsstrahlung spectrum. Rudstam's semiempirical formula has been

used to analyze the experimental data. For the reactions in tungsten the ratios of the yields produced by photons and electrons have been measured.

TABLE I.

_ •ooiMeV — M

Initial nucleus Emitted

nucleus

Residual nucleus (600- 1300 Me

V

OQ. mb

°Q, mb

mb

(Ref. mb

i («»p> (theory 6>

t iMyy

4p, 9- 13/m ‘SYb

3p. I0 l5n

l”Lu 223 3.1 ±0.6 2236 - 245*49

2

US-ISI. Ifllttr 7« If. S 9/1

l ”Ht 40 3.«±l.l 0.38 - 22±4

3

1H2-IM. l*4^y •tp.lt- I5n Svb 2.0 1.9±0.4 1.38 _ 27*5

l US—III. t»« w 3p,8- 12n n

!-“

2p.9- 13/t

l"Hf

t.96 • 2.2±0.4 •

3.9 - 23±4

S

- us—IM. 3p,6-IO/« 2p,7 tt/i

*9-

^Ht

40 5.5* 1.1 46 - 27±5

6. 4*2 1*1. IM^y

lOp, 26- 30/1 10.4 3.0±1.0 0.10 - -

7 IM. IMyy

1 p, 0-1

A

»T. 1.63 25*05 - - 26±5

a

U3. IS.. lo«ta> U* 2p, 0-3/t "HI aoo i).12±0.02 - _ 31 ±6

9

l !jTa 3p, 9« *S» 2.3 3-6±0.7 32 7.07 2p. JO/i “Lu

10 w-ra

73 * Ip. on ‘«Hf 3.3 5-S±t.l 0.7 8.9 -

11 “ra 2p, 6/i “La

1 P. 7/t ‘«Ht

2.8 65*1.2 2.44 6.33 -

12 '"Ta 3p, tin “Yb

if. IO/i ‘:»T.u

2.0 2.9 ±0.6 1.9 3 67 -

13 ‘"Ta 2p, 3/i ‘Shu

lp, 9/i nHI t-52 • 2.4*05 • 48 3.67 - M ‘"Ta If. 25/i ‘Son 9.6 85*1.7 0.12 - -

•In view of the absence of data on the absolute intensities of the

lines in the spectrum of m Lu activity , in calculation of aa

the

tensity of the peak Ey =739 keV was taken as 100%.

,/

FORM. N3S-418

(R EV. 7.14.64) uscomm.oc 2eoio.pe< PHOTONUCLEAR DATA SHEET 150

U.S. DEPARTMENT O e COMMERCE NATIONAL BUREAU O- STANDARDS
J.J. Murphy II, H.J. Gehrhardt and D.M. Skopik

Nucl. Phys. A277 , 69 (1977)

EL EM. SYM. A

METMOP

Ta 181 73

REF. NO.

77 Mu 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

TYPE RANGE TYPE RANGE

E,A ABX 14-100 D 100 MAG-D 50

E q (MeV)

Fig. 1. The =-partic!e energy spectra at 50’ in the lab for the six nuclei studied. Note that as Z increases, the cross section decreases and the energy of the peak increases. Errors are statistical. Curves

are to guide the eye.

FORM M3S-41I

(R EV. 7-1 4.S4I USCOMM-NtJ.DC

Fig. 2. Energy of the cross section peak as a function of Z. The solid line is the energy of the classical Coulomb barrier. 151
«ep. V. Bellini, V. Emma, A.S. Figuera, S. Lo Nigro, C. Milone,

G.S. Pappalardo, G. Bologna

II Nuovo Cimento 47A, 529 (1978)

EL EM. SYM.

Ta 181 73

METHOD

78 Be 10 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

G,F RLX 180-999 22U-999 TKK-U 4PI

Summary. — The photofission yields of Re, \V and Ta induced by a coherent bremsstrahlung beam from 1000 MeV electrons striking a' diamond single crystal have been measured. The experiment has been performed at eighteen different energies of the main peak of the photon

spectrum, in tho energy range between 220 MoV and 550 MeV, by detecting - the fission fragments with glass sandwiches. The behaviour of the photofission cross-section has been deduced from the experimental yields by

using an appropriate unfolding method. The obtained curves clearly

show a first resonance centred at a photon energy k ~ 350 MeV with a FWHil ~ 145 MeV, while there is a hint of a second resonance at

fc ~ 750 MeV. Information on tho energy dependence of tho nuclear fis- sility from 100 MeV to 1000 MoV has been deduced from the comparison

of the estimated photofission cross-section with the total photon interaction

cross-section. It has been found that tho photomesonic model of the fis- sion process permits to explain the energy dependence of our photofissiou

cross-sections if a nuclear fissility increasing with photon onergy is assumed.

Fig. 5. - See caption to fig. 3. Results for Ta.

COHERENT BREM.

Zero cross section assumed below

180 MeV.

Fig. 3. - Photofission yields per equivalent quantum as a function of the first-peak energy k, of photous. The dots are the experimental data; the dashed curve represents

the yield function recalculated from the f{k) data. Results for Re.

Fig. 8. - See caption to fig. 6. Result for Ta(y, f).

Fig. 6. - Photofission cross-section estimated by our unfolding method. Results for Re (y, f).

form N3S-418

(R6V. 7-14.641 USC OMM-N BS*0 C

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 152
Table II. - Estimated f( values and corresponding errors. All the data are given in arbitrary units.

k /(fc) (arbitrary units) (McV) Ro W Ta

100 — 0.31 - 0.85 —0.14 4^ 0.85 —0.49 ± 0.87 160 0.03 ± 0.31 0.24 ± 0.31 0.26 ± 0.33 220 1.95 ± 0.41 2.50 ± 0.41 2.51 ±0.41

280 6.26 ± 0.53 6.51 ± 0.53 6.63 ± 0.55 340 3.90 ± 0.69 8.75 ± 0.69 8.56 ± 0.68 400 3.16 ± 0.72 8.38 ± 0.72 7.15 ± 0.70 460 6.10 ± 0.51 6.34 ± 0.51 5.43 ± 0.49 520 4.83 ± 0.47 5.04 ± 0.47 4.70 ± 0.48 580 4.70 ± 0.57 4.95 ± 0.57 4.72 ± 0.58 640 4.96 ± 0.59 5.20 ± 0.59 4.98 ± 0.60 700 5.41 4- 0.58 5.57 ± 0.58 5.29 ± 0.58 760 5.68 ± 0.57 o. / 8 4 0.57 5.41 ± 0.57 820 5.65 ± 0.61 5.71 ±0.61 5.32 ± 0.61 S30 5.51 ± 0.67 5.53 ± 0.67 5.18 ± 0.67 940 5.38 ± 0.74 5.36 ± 0.74 4.98 ± 0.73 1000 5.23 ± 0.80 5.18 ± 0.80 4.70 ± 0.77

Fig. 11. - Nuclear Gssilitv P, a.® a function of tho photon energy k. The curves are normalized at I: = 10<>0 MeV. a) Bi, b) Pb. c) Au, d) Ta.

/

Fig- 12.

Fig. 12. - Photofission cross-section of Ta vs. the photon energy A:. The dot3 are the f(k) data of the present analysis; the dashed curve represents the cross-section calculated by using the P, energy dependence of tig. 11. i
REF $. Kahane, R. Moreh, and 0. Shahal

Phys. Rev. C 18, 1217 (1978)

ELEM. SYM.

Ta

A

181

Z

73

METHOD REF. NO.

78 Ka 6 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,G ABX 6- 12 C 6- 12 SCD-D DST

(6.84-11 .39) (6.84-11 .3? )

Monoenergetic photons at eight energies in the range 6.84-11.39 MeV were elastically scattered from

targets of "'Ta, Pb. and U,U at 9 = 1.21*- 1-50*. The differential scattering cross section at such angles was measured relative to the Compton cross section. The photon beam was obtained from the Ni(n,y)

reaction using thermal neutrons. Strong evidence for the contribution of both Rayleigh and the real Delbruck

amplitudes and for their destructive interference was obtained.

FIG. 4. Differential cross sections for elastic scattering of photons at 9 = 1.27° and 1.50° from Ta. PM

denotes theoretical values obtained using the Delbruck

amplitudes based on Papatzacos and Mork (Refs. 3 and

4); ES denotes theoretical values obtained using the Delbruck amplitudes of Ehlotzky and Sheppey (Ref. 1).

TABLE II. Differential cross sections (mb/sr) of

elastic photon scattering from Ta (2 = 73) at 9 = 1.27° ±0.27° and 1.50 ±0.35°. I’M represent calculated values using the Delbruck amplitudes of Papatzacos and Mork;

ES are those of Ehlotzky and Sheppey.

9 = 1.27° ±0.27° 9 = 1.50° ±0.35° E (keV) Exp. PM ES Exp. PM ES

6 837 423 ±40 658 773 349 ±37 380 485

7 819 375 ±51 415 560 * • • . . . * * *

8 533 291 ±54 307 443 171 ±17 168 273

8 999 270 ±25 257 371 136± 15 148 243 11388 179 ±54 203 313 153 ±54 162 248

F. Ehlotzky and G.C. Sheppey, Nouvo Cimento

3 P. Papatzacos and K. Mork, Phys . Rev. D 12,

Phys. Rep. 21C, 81 (1975).

^T. 3ar-Noy and S. Kahane, Nucl . Phys. A288 ,

33,

206

132

1185 (1964).

(1975);

(1977).

/

form N3S-4I8

(R EV. 7-1 4-64) USCOMM-NBS-DC PHOTONUCLEAR DATA SHEET 154

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
J.O. Murphy, II, D.M. Skopik, J. Asai , and J. Uegaki

Phys. Rev. C 1_8, 736 (1978)

ELEM. SYM.

Ta 181 73

METHOD REF. NO.

78 Mu 9 hg

EXCITATION ENERGY

SOURCE DETECTOR

REACTION RESULT ANGLE

TYPE RANGE TYPE RANGE

E,A ABX 5-100 D 100 MAG-D DST

a particle* from the electrodisintegration of seven nuclei with Z between 29 and 79 have been observed. Energy spectra at SOT in the laboratory for six nuclei and angular distribtions for five nuclei are reported. The cross sections exhibit a broad peak whose magnitude decreases with increasing Z; the energy of the peak increases as Z increases. Angular distributions at the highest energies measured become increasingly forward peaked suggesting a direct-reaction process.

FIG. 2. The a -particle energy spectra at 50* in the laboratory for the four new nuclei studied as well as for two nuclei in which additional data have been obtained. The solid curves are the evaporation model fits described In text.

/

^J.J. Murphy, II, H.J. Gehrhardt, and

D.M. Skopik, Nucl . Phys. A277, 69 (1977)

form N3S-418

in ev. 7-1 *- 8«i use OMM-N es-oc

FIG. 3. Energy of the cross section peak as a function

of z The solid line is the energy of the classical Coulomb barrier. The closed circles are the current work; the open circles are from Ref. 1.

FIG. 4. Magnitude of cross section peak as a function of Z. The closed circles are the current work; the open circles are from Ref. 1. 155

over

5MMERCE

VNDA RDS PHOTONUCLEAR DAT/
(nb/MeV

sr)

FIG. 8. Angular distributions for tantalum. The comments made for Fig. 5 apply here.

/

156
ntr. F* N. Rad, T. Sasanuma, W. Bertozzi, J. Heisenberg, M. V. Hynes,

S. Kowalski, H. Miska, B. Norum, C. P. Sargent, W. Turchinetz,

L and C. F. Williamson

Phys. Rev. Lett. 40, 368 (1978) Ta

* ref. no. Remarks: *EFF. MOMENT. TRANS. 78 Ra 1

181 73

hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,E/ FMF 0- 1 D 0*3 MAG-D DST

Elastic and Inelastic form factors for electron scattering from the ground-state rota- * EFF. Q

tlonal band of mTa have been studied for momentum transfers 0.4 fm* 1 * qeff « 2.7 fm' 1 The data are shown to provide an Independent check of the rotational assumption, thus adding confidence that the experimental form factors are characteristic of a stable In- trinsic state associated with the rotational band. The data are also compared to a Hartree-Fock calculation using density-dependent Interactions.

FIG. 1. Experimental “form factor” [F = (<r/o Mo „),/,

l for the ground-state rotational band of 1MTa as a function of effective momentum transfer. All data points were taken at 90* laboratory angle except those below

q eff= 0.8 fm* 1 which were taken at 45*. The solid curves

are the theoretical calculation based on the density-dependent interaction with filling approximation using the Hartree-Fock method.

1 1

1 1 1

• }°

' M j

, }

!l

“I—1—1—1

i,u ,

1 • •

}{j

1 1 1

fit/'

'

. 1 1 j

r b

:

l iJ|j

pyf

ill

litIf

1

: If

, 1 , v

1 . . 1 i i—

A

J . i 1

i i i i I , i i i I i__i i i L_ m 1.3 2.0 2.3

FIG. 2. The ratio (R) of the measured cross section

(a) On/}, and (b) a 13/} to that predicted by the rotational assumption from (a) a9/^, o n/l , and ai 5/5 , and (b) o9/},

Rorm N8S-41S

<R CV. 7-1 4-441 use OMM-NBS-OC PHOTONUCLEAR DATA SHEET 157

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. P. Rulhusen, F. Smend and M. Schumacher

Z. Physik A288, 119 (1978)

ELEM. SYM.

Ta

A

181

Z

73

METHOD REF. NO.

78 Ru 3 rs

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G jG ABX 3 D 3 SCD-D DST

Differential cross sections for the elastic scattering of 2.754 MeV photons by Ta have

been measured for angles ranging from 30° to 150°. A comparison with lowest-order

Delbriick theory reveals discrepancies of the same size as previously observed for Pb and

Bi. Consideration is given to interference phenomena between Delbriick, Rayleigh and

nuclear Thomson scattering.

Table 1. Differential cross sections for elastic scattering of

2.754 MeV photons by Ta (Z = 73)

0

Ideg)

J<r/dQ„P (pb/sr) (pb/sr)

30 76 +30 77.6 45 43.7 ± 2.6 34.0 60 24.2 ± 1.3 18.8 75 20.4 ± 1.0 16.5 90 19.2 ± 0.6 17.9 120 25.0 ± 0.9 23.5 150 31.6+ 2.0 29.7

30 SO 30 120 150 B

Fig. 3. Comparison of experimental differential cross sections with

different predictions: (a): calculated from the N-. R-, T-, and Damplitudes of Table 2. (b): calculated without including the real Damplitudes. (c): calculated from the N- and T-amplitudes only, (d): calculated in the same way as (a) but with reversed signs of the real D-amplitudes

form N3S-418

<R EV. 7-1 4-64) USCOMM-NBS-DC PHOTONUCLEAR DATA SHEET 158

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
«er. .$* A. Hayashi, S. Yamamoto, I. Kimura, K. Kobayashi, T. Mori,

S. Kanazawa, H. Nishihara, S.A. Bokharee, R.W. Emmett, R.C. Block

M. Becker, D.R. Harris, B.K. Malaviya

Ann. Rpt. Res. Reac. Inst., Kyoto Univ. 1_3, 23 (1980)

method

EL EM. SYM. A

Ta

REF. NO. 80 Ha £ egf

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN SPC 7-60 C 30,60 T0F-D DST

Three kinds of photoneutron targets, the cylindrical lead target, and the spherical and sphe- ANG DST WITH ACT DET

roidal tantalum targets were designed as pulsed-neutron sources with an electron linear accelerator ~

for the fast neutron spectrum study in assemblies of reactor materials. Angular distributions of photoneutrons and X-rays from these targets bombarded by about 30- and 60-MeV electrons were

obtained by the activation method and the results show fairly isotropic photoneutron distributions except to the forward and extraordinarily sharp forward peak of X-rays. Among these three targets the spheroidal tantalum target is seen to be superior to others from the viewpoints of the isotropy of photoneutrons and of a lower forward peak of X-rays even at the higher bombarding energy. However, for the lower electron energy, about 30 MeV, both the lead target and the spherical tantalum target can be usable for the above purpose, although the maximum beam power of the former is restricted to about 120 watts. Neutron spectra from these targets were measured in the energy range from 20 keV to 10 MeV

bv the L1NAC TOF method. It was found that neutron spectra from tantalum targets are apparently softer than that from the lead target. With the above characteristics obtained experimentally, these targets will be used for the neutron spectra measurements tn assemblies of reactor materials.

- 2 -° " t »

* i

' * - 3 *

* « JI

1.0 -

0.0 I 1 1 1 I 0* 9tf 180i

An«ie (e)

Fig. 7. Angular distribution of photoneutrons emanated from the spherical tantalum target bombarded by 36-MeV electrons. The s, Co

activities from Ni foils are shown. The symbols

are the same as in Fig. 4.

•dll Mon aroasa n* c e^r-c Fig. 12. Distributions of X-rays near the forward

direction around the central axis of the electron beam

from the spherical tantalum target bombarded by 36- MeV electrons and the spheroidal tantalum target by

64- MeV and 28-MeV electrons nd. Fig. 1 bn. The : Ni activities from Ni foils by 36-MeV. 64-MeV and 28-MeV electrons are shown as the symbols « and O. respectively.

form M3S-418

<R EV. 7-1 4.941 USCOMM-N BS-OC

(oyer)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 159
Fig. 13. Distributions of photoneutrons near

the forward direction around the central axis of

the electron beam from the spheroidal tantalum

target bombarded by 64-MeV and 28-MeV

electrons. The S8 Co activities from Ni foils by

64-MeV and 28-MeV electrons are shown as the symbols • and O , respectively.

Fig. 14. Photoneutron spectra from the lead target and the spherical tanta- lum target bombarded by approximately 30-MeV electrons. curve is obtained by eye guide fitting of the measured tantalum target data and curve is for the lead data. curve is obtained by fitting the data of the lead target with nuclear temperatures of evaporation spectra. Tt=0.89 MeV (^3.8 MeV neutrons) and T2 =1.70MeV (>3.8MeV

neutrons). •••• shows data measured with the 9 Li glass scintillation or

the l0 B-vaseline-plug Nal(Tl) detectors. OOGC shows data with the liquid

scintillation detector.

/

160
W. Muckenheim, P. Rullhusen, F. Smend, M. Schumacher

Phys. Lett. 92B, 71 (1980)

«eF. ELEM. SVM. A Z

METHOD

Ta 181 73

REF. NO.

80 Mu 4 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G ABX 3 D 2-4 UKM-D DST

(3.010) (2. 5-3. 5)

Elastic photon scattering investigated at energies of 2.5-3.S MeV using radioactive sources has revealed a large probability for observing photoexcibtion of nuclear levels. This finding removes inconsistencies in previously investigated properties

ot Delbruck scattering and provides a new access to nuclear resonance fluorescence.

LFT, LEVEL AT 3.010

2.6 2.0 U 2.6 10 It MeV

PHOTON ENERGY

Fig. 1. Elastic differential cross sections versus photon energy. Unless error bars are given, the error intervals are at most

equal to the diameter of the circles. Predicted differential cross sections: (a) including Coulomb corrections in addition

to lowest-order D-, T-. R-and N-amplitudes, fb) including lowest-order D-. T-, R- and N-amplitudes. (c) including T-, Rand N-amplitudes.

,/

i * 3

•S ® 3 3 £ So C. O c

I - %

C -3 .. 3 « .-s & 3 2,

> -

« c S o

e

o

^ O c^i "w ^

.5 5 •-

•o 2 5 ^ 4) y a. Q •O 2

O w "

JZ 3 n

o. 3 p;

& u

o 2 £

la*

* 1

1

‘•j U “ < 8 S

JC

i/i

c/» «i .o o fe5 ^ O •5SS c >

o 2 —

O £ « ~ "3^ £

U -3 -n -2 > « 1 r

u

r*0

ST >5

c; ~

O v> «o o — ©

Ai Ai

fN r- odd

Vi Vi

Tt Oi o — r- tt odd

l I I

l l l o

to p' o -i - o

r*\ —«/"> c*i © • Os vO o—

— i i i i pi i

£

Q 3

ki >

<1 «,

a ^

-O _ o 2.2 C 5 ;

•H ~ 2 o. •£

• n a 2 o -jj H j3l “

- f — — n p«v 1/1 to kn 00 w-> -O »o r-1

’'T ^

’f ’t O t n tf n

in n n n n n

2

30 2

d I g

form N8S-418

(R CV. 7-1 4* 04 ) USC OMM-N BS-OC PH0T0NUCLEAR DATA SHEET 161

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
«er. F*N. Rad, W. Bertozzi, S. Kowalski, C„P. Sargent, C.F. Williamson

M.V. Hynes, B. Norum, B. Peterson, T. Sasanuma, W. Turchinetz

Phys. Rev. Lett. 45_, 1758 (1980)

METHOD

EL EM. STM. Ta 181 73

REF. NO.

80 Ra 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,E/ FMF 0-1 D 0*3 MAG-D 180

(.136, .302) (.7-2.5)

Transverse electron scattering form factors from the ground-state rotational band of

18l Ta have been measured to study the single-particle contribution to the magnetization

current density. The data are compared with a Hartree-Fock calculation by use of density matrix expansion with filling approximation.

TWO LEV .136, .302 MEV

PACS numbers: 25.30.Cg, 21.10.Ky, 27.70.+ q

./

(OVER)

form N3S.418

(REV. 7-14-641 USCOMM-NBS-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 162
FIG. 1. Experimental results for |F" r(<7)l

2 for electron

scattering from the first three members of the groundstate rotational band of l91 Ta: circles, elastic; triangles, squares, The curves are the result

of the H-F theory described in the text. The solid lines are the full results, and the dashed lines represent the contributions of the individual multipoles. The dashdotted curve is the total elastic form factor of a^ 7 / 2 proton in a spherical harmonic oscillator potential with

oscillator parameter b =2 fm. The individual multipoles,

.V/l—An, are shown as dashed curves.

/

163
ref. N.K. Sherman, C.K. Ross, K.H. Lokan

Phys. Rev. C21_, 2328 (1980)

EL EM. SYM.

Ta 181 73

METHOD REF. NO.

80 Sh 10 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,MUT ABX 3-30 C 42 TOF-D 4PI

D(G,N) SPECTROMETER

Photon absorption by Al, Ta, and Bi between 3 and 30 MeV was measured using as a photon

spectrometer a photoneutron time-of-flight detector and a liquid deuterium target. The atomic cross sections of Ta and B. at the lowest energies (and of Al at higher energies) agree with calculated values appearing in published tabulations but exceed them at 25 MeV by about 2% in Ta and 3% in Bi. Calculations by others using empirical Coulomb corrections and improved screening corrections to the cross section for pair production by the nucleus agree with experiment to within (0.5 ±0.4)%. Best experimental values of the combined correction for Bi afe given.

‘NUCLEAR REACTIONS «Al. IS, Ta, 209Bi; measured total photon absorption 1

(T r (£); observed GDR; deduced electron pair production cr K(E); E- 3.0 to 30.0 MeV; resolution 500 keV; deduced experimental values for Bi of the combined

Coulomb and screening correction; 3 H(y ,n) LDj/TOF spectrometer.

(OVER)

form N3S-418

(REV. 7.14.64) USC OMM.OC 26010-P64 PHOTONUCLEAR DATA SHEET 164

U.S. DEPARTMENT OF COMMEPCi

N A T • ON AL BUREAU OF STAMOARDS
TABLE III. Measured values <7exp(Ta) of the absorption cross section of tantalum and their

statistical errors c 0 are listed against photon energy ui along with the atomic cross sections

cr z(Ta) and nuclear pair cross sections aK{Ta) obtained from them. Values of <J2 interpolated from measurements made at Mainz 5 are shown for comparison. The amounts <5cr z and oaK by which cr z (Ta) and aK( Ta) exceed the calculated b values crz

(calc) and cr^icalc) are also given.

UJ (MeV)

tf«p(Ta)

(b) «o

(mb)

<r 2( Ta) c

(b)

6a2 (mb)cr z(.Mainz)

(b)

Q Ta)

(b)

c^tcalc)

(b) 6aK(b)

3.869 12.126 ±56 12.123 -57 4.47 4.45 +0.02 4.327 12.128 30.5 12.124 -66 5.04 5.05 -0.01

4.830 12.258 23.5 12.252 ±8 5.82 5.67 +0.15 5.333 12.394 21 12.386 -4 6.26 6.23 +0.03 5.837 12.561 20.5 12.551 0 6.80 6.75 +0.05

6.348 12.789 21.5 12.777 -60 7.35 7.27 +0.08 6.870 12.990 21.5 12.974 +70 7.84 7.77 +0.07 7.404 13.171 22.5 13.149 +40 8.26 8.24 +0.02 7.936 13.391 24.5 13.365 +40 8.69 8.66 +0.03 8.382 13.601 26.5 13.564 +11 9.11 9.07 +0.04 8.936 13.854 28.5 13.807 +70 9.55 9.46 +0.09

9.476 14.079 30 14.019 +70 9.92 9.84 +0.08

9.992 14.318 32 14.240 +70 14.19 10.30 -10.22 +0.08 10.514 14.507 34 14.405 +30 14.40 10.61 10.56 +0.05 11.039 14.775 36.5 14.635 -60 14.58 10.98 10.90 +0.08 11.557 15.056 40 14.828 +40 14.79 11.30 11.23 +0.07

12.038 15.380 41.5 15.052 +60 14.98 11.63 11.58 +0.05 12.629 15.562 46 15.194 0 15.17 .11.88 11.88 0.00 13.174 15.730 47.5 15.386 -20 12.18 12.18 0.00 13.715 15.947 54 15.605 -20 12.48 12.46 +0.02 14.253 16.124 56.5 15.764 — 50 15.81 12.70 12.76 -0.06

14.780 16.303 63 15.921 -so 16.02 12.93 13.02 -0.09

15.293 16.522 64.5 16.137 — 50 16.23 13.21 13.27 -0.06

15.840 16.633 67.5 16.333 -40 16.40 13.43 13.50 -0.02

16.422 16.841 68.5 16.541 -10 16.57 13.76 13.77 -0.01

16.977 16.924 78 16.684 -30 13.97 14.00 -0.03

17.500 17.093 82.5 16.895 +20 14.25 14.22- +0.03 18.078 17.188 34 17.026 -30 14.44 14.46 -0.02

18.665 17.324 86.5 17.188 -20 17.25 14.72 d 14.66 +0.06 19.286 17.412 ±90 17.294 -100 17.45 14.96 d 14.90 +0.06 19.856 17.920 112 17.816 +260 17.62 15.17 d 15.11 +0.06 20.370 17.850 112 17.758 +70 17.75 15.35 d 15.28 +0.07 20.907 17.868 115 17.785 -50 17.88 15.53 d 15.47 +0.06 21.468 17.903 117.5 17.829 -140

22.055 18.316 124 18.252 +130

22.670 18.362 127.5 18.306 +50

23.314 18.380 131 18.333 -90

23.989 18.791 136.5 18.751 +170

24.697 18.514 137.5 18.480 -250

25.312 18.709 176 18.679 -190

25.825 18.658 177.5 13.632 -360

26.355 19.156 137.5 19.132 +30

26.903 19.300 195.5 19.277 ^50 27.470 19.408 206.5 19.387 +30

1 J. Ahrens et at. (Ref. 3). Numerical values are given in Ref. 6.

b Calculated atomic cross section values uz(calc) were obtained by Interpolation of tables compiled by J. H. Hubbell, H. A. Gimm, and I. 0verbd (private communication).

c Obtained by subtracting the total photoneotron cross section measured (Ref. 17) by R. Bergere et al. from cr„

p(Ta). See also Ref. 16.

d Using the interpolated Mainz (Ref. 6) value.

./

165
REF. G.M. Gurevich, L.E. Lazareva.

G.V. Solodukhov, V. A. Tyutin

Nucl. Phys. A351 , 257 (1981)

V.M. Mazur, S.Yu. Merkulov, ELEM. SYM.

Ta 181 73

METHOD

81 Gu 2 h9

REACTION EXCI TATION SOURCE DETECTOR

RESULT ENERGY TYPE RANGE TYPE RANGE ANGLE

G,MU-T ABX THR-20 c 27 NAI-D 4PI

Abstract: The curses of the total gamma-absorption cross sections (u lol ) in the El giant resonance energy range for the nuclei ' -'‘Sm.'

1 "Gd. ""Ho. ‘" 8 Er. '•‘Yb. l78 Hf. ,80 Hf. ""Ta. 182 W, 18 '*W. ,8e'W

and '“’Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections <r IM are given. Quadrupole moments (Q0) and nuclear deformation

parameters (/<) were obtained. For deformed nuclei in the ~ 155 < A < - 180 region a violation of the correlation between

giant resonance widths If ) and nuclear deformation parameters was found, T, and T,. the widths of the resonances corresponding to \ ibrations of nucleons along and across the nuclear deformation

axis, were observed to decrease with the increase of .-I which could be accounted for by the presence of an .V = IDS subshell

NUCLEAR REACTIONS IMSm. ''"Gd. ""Ho. ">8 Er,

,74Yb. ,78 180 Hf. ,8l Ta.

is:, ms 1 ""\V. rl ’Au (/. X). F. = 7-20 MeV: measured total n{E): deduced integrated a, Lorentz line parameters. 15 'l Sm. l5f, Gd. ""Ho. ",8 Er.

174Yb, l78 - 180 Hf, ""Ta.

82 - 184 ' 18<> W, "'Au deduced /(. Qt)

. F

.

giant resonance evolution. Enriched, natural targets.

Fig. 2 Total nuclear ——. ‘’"Gd. ""Ho, ‘""Er. FO

IR E use OMM-N BS-OC

absorption cross sections (ir,

ia ) measured bv the absorption method for '"Sm.

J Yh. ''"Ilf. '""Ilf. '"'Ta. I82 W. ’"‘W. '“W and '" 7 Au. Rms error bars are shown.PHOTONUCLEAR DATA SHEET 166

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
Table 2

Parameters of Lorentz curves filling the experimental data on a 101

Nucleus

E, r, £, <j 2 r. a,r. r

(MeV) (mb) (MeV) (MeV) (mb) (MeV) <r,r, (MeV)

’•‘Sm 12.2 188 3.4 15.7 207 5.7 1.85 8.1

1 5<> Gd 12.3 206 3.2 15.7 220 5.5 1.81 7.7

l<,s Ho 12.3 202 2.3 15.2 239 4.8 2.47 7.0 ""Er 11.9 TV! 3.2 15.5 275 4.5 1.73 7.4 ’’‘Yb 12.3 297 2.9 15.5 320 4.9 1.80 7.1

*' 8 Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2

,so Hf 12.2 286 ° 3.2 15.3 324 5.1 1.81 7.1 '*'Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8

,a ’W 11.9 267 3.2 14.8 303 5.6 2.01 6.8 IMW 11.9 315 2.9 14.8 321 4.7 1.65 6.8

i 12.0 246 3.3 14 5 332 5.1 2.07 6.4

1,1 Au 13.7 535 5.2

Average 0

**

1 .4

3 0 1 1.2

', 0 9.3 °„ 1.5

°

0 9.7 °

0 4.6°0 0.22

error MeV

Tahi+ 3

Ratios of nuclear ellipsoid axes ( A ). deformation parameters ( /() and intrinsic quadrupole moments ((?„]i. calculated from £,/£,

Nucleus 1 **Sm ' 'Tld "•'llo ’""Hr 1 ' 4 Yb ''“HI ’""III ""Ta nu w IMJ W 1M, 'W

K 1 320 1 302 1.259 1.327 1.289 1.296 1.281 1.263 1.271 1.268 1.229

0 326 0 309 0 266 0.334 0.296 0.303 0.288 0.270 0.278 0.274 0 235 P + 0 til 7 + 0016 + 0 036 ± o 032 ±0 024 ±0 032 ±0 036 + 0 026 + 0.030 + 0 032 + 0.033

6 3 6 2 5.8 7 S 7 0 7.5 7.2 6.9 7.2 7.1 6 2

Vi, ^ U } + 0 3 + 0 8 + 0 7 + 0 6 + 0.8 + 0 9 + 0,7 + 0 8 + 08 + 0 9

Tahi i 4

Integral characteristics of HI gignt resonance

Nucleus (MeV b)

t »p 0 06.YZ 4

"oi. (MeV b)

<T,i 0.06 V/ 4

« i (mb)

n IL (mb)

" -II.--* (mb) (mb MeV

1 ) (mb

w -2L MeV" 1 )

w :i (/<h • MeV

1 "Sm 1 94 - 0.06 0.87 2 86 1 29 117+3.5 156 0.189 9.1 +0.3 14.3 3.23 '"Gd 2.07 + 0.07 0 91 2 95 1.30 143 + 4.6 163 0 194 10.5 ±0.4 14.9 3 30 ""Ho 1.86 — 0 06 OMS 2 53 1.06 155 + 4.4 160 0.177 10 1 ±0.3 12.6 2.54 ""l r 2 24-0 06 0.92 3 07 1.26 161 ±4.3 197 0.212 1 2.0 ±0.3 16.0 3.13 ''•Yb 2 69 + 0 05 1.07 3 82 1.52 195 + 3.4 240 0.247 14.5 ±0.3 19.2 3.54

''Mil 2 85-0 07 111 3 99 1.55 208 + 4 9 247 0.247 1 5.3 ± 0.4 20.2 3.59

'"Til 2. ’2 -0 06 1.05 4 03 1.56 200 + 4 4 250 0.246 15.1 ±0.3 20.7 3.61

1 *

’ T.i 2.84-0.07 1 09 3 81 1 46 2 1 0 ± 5.3 245 0 239 16.0 ±0.4 20.0 3.45 " ; \V 2.86-0.07 1 09 4 01 1.52 21 1 ± 5.3 256 0.248 1 6.2 ± 0.4 21.6 3.70

2.78 + 0 07 1 05 3 80 1.43 207+5.3 251 0.240 1 5.9 ±0.4 20.9 3.51

2 90 — 0 07 1 08 3 95 1.48 214 + 5.3 256 0.241 1 6.2 ± 0 4 21.6 3.56 "'Au 3 12 : 0 06 1 10 4 37 1.54 229 + 4 2 276 0 241 1 8.6 ± 0.4 23.3 3.49

/

167
ref. A. Lepretre, H. Beil, R. Bergfere, P. Carlos, J. Fagot, A. De Miniac,

A. Veyssifere

Nucl . Phys. A367 , 237 (1981)

ELEM. SYM. A

Ta 181 73

METHOD REF. NO. 81 Le 1 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RAN 6C TYPE RANSE

G,SN ABX 25-140 D 25-140 MOD1

4PI

G,XN ABX 25-140 D 25-140 MOD1

4PI

Abstract: The total photonuclear absorption cross section for Sn, Ce, Ta, Pb and U has been studied from

25 to 140 MeV using a continuously variable monochromatic photon beam obtained from the

annihilation in flight of monoenergetic positrons. The basic experimental results are a set of data

giving sums of inclusive multiple photoneutron production cross sections of the form <r u\Ey) =

in\Ey) for neutron multiplicities ranging from i= 1 to 12. From these data the total photonuclear absorption cross section <r(tot:£T ) has been deduced. It is concluded that Levinger's modified quasideuteron model describes the total cross sections reasonably well. When these data

are combined with lower energy data and integrated to 140 MeV they indicate the need for an enhancement factor K for the Thomas-Reiche-Kuhn sum rule of 0.76 ±0.10. No evidence was

found that would indicate an A-dependence for the enhancement factor.

(G,SN) NO G,1N IN G,SN

<r"\Ey ) = I o-(y, in: Ey

)

.

< ”/

E PHOTONUCLEAR REACTIONS Sn. Ce, Ta, Pb, U(-y, xn), Ey = 25-140i MeVmeasured a(Ey ) summed for x = l-12; deduced criE^ total), integrated <r, interaction models. Monochromatic photons.

Table 3 Integrated cross sections

Sn Ce Ta Pb U U

<T0 = 0.06NZ/A (MeV - b) 1.74 2.04 2.61 2.97 3.40 3.40 £To(MeV) 29.7 25 25 25 18 18.30

f E’o (MeV-b) M=\ (TGDR(Ey )dEy Jbi. (<fo unit)

2.0±0.15 *)

1.15 ±0.09

2. 1 3 ± 0. 1 5

b

) 1.04 ±0.07

2.90±0.23 b

) 1.11 ±0.09

3.48 ±0.23 c

) 1.17±0.08

2.98±0.15 d

) 0.88 ±0.05

3.58')

1.05

r'*0M' v (Mevb)

/V= it

2 (£t ) d£,

Je,o (<t0 unit)

0.96±0.1 0.55±0.061.27±0.1

0.63 ±0.05

1.73±0.15

0.66 ±0.06

1.69±0.15 0.57±0.052.59±9.2 0.76±0.06

2.59 ±0.2

0.76±0.06 (MeV-b) M+ N

(cto unit)

2.96±0.2

1.70±0.12

3.40±0.2

1.67±0.10

4.63 ±0.3

1.77±0.10

5.17±0.3

1.74±0.10

5.57±0.3

1.64 ± 0. 10

6.17±0.3

1.81 ± 0. 10 (M + (V) + evaluation of the

- 140 MeV

J |(7 (1) -cj'

<21

| dEy contribution

Je,o 1.74±0.15 1.71 ±0.15 1.81 ±0.15 1.78 ±0.15 1 .68 ±0.15 1.85 ±0.15

= (1 + K) ((T0 unit)

|

(tl(£t ) d£, ((T0 unit) 1.28*) 1.24

b

) 1.30

b

) 1.35*) 1.18

d

) 1.43 ')

*) Ref.

26

). b

) Ref.

27

). c

) Ref.

5

). d

) Ref.

28

). *) Ref.

2’). The symbols M and N are defined in the text. The last row gives the integrated cross sections for the Lorentz line fit, arL(Ey ) to the GDR data, published in the above references. /

(OVER )

form N8S-418

(REV. 7° 1 4-64) USC OMM*N BS*OC PHOTONUCLEAR DATA SHEET 168

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
Fia 11 The general behaviour of the "smoothed” average neutron yield cross sections <r(y, x n)

l /triy. in : £,) for the Sn. Ce. Ta. Pb and U nuclei studied in the present paper (see text).

Fig. 15. Total photonuclear absorption cross sections <7(tot : £,) = (r'*'(£y ) from the present paper, represented by the experimental points and the corresponding full lines, are shown for Pb. Sn. Ce, Ta and

U. These experimental results for photon energies £, between 20 and 140 MeV are compared with: (a) Lorentz line tits to the GDR data of the appropriate nucleus represented by the dot-dash tr 1 .t Ey ) plots, ibl Ouasidcuteron cross sections, £7

- odi£, ) = -(>\Z/ A)fr0tEy

) for the appropriate nuclei, represented by

the dotted <r ao(Ey ) plots. Here <7 Di £, ) is the photodisintegration cross sectton of deuterium, (c) .Modified quasideuteron cross sections. croovtl^-J = 1 8.VZM)<rD(£T ) exp (-DI Ey ) with D = 60 MeV, represented by the dashed (TmodIEi) plots. Pertinent GDR data for Pb. Sn, Ce, Ta and U were taken from

refs.

169
M. Schumacher, F. Smend, W. Muckenheim, P. Rullhusen, H.G. Borner

Z. Phys. A300 , 193 (1981)

EL EM. SYM.

Ta 181 73

REF. NO.

REF.

METHOO

81 Sc 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE MANGE TYPE RANGE G,G ABX 2-7 2-7 SCD-D 9u

Elastic scattering by nuclei in the range of mass numbers between 64 and 238 has been

studied with monochromatic photons in the energy range between 2 and 8 MeV. These

photons were provided either by a Ti(n,y) source installed in the tangential through

channel of the Grenoble high flux reactor, or by 24 Na and 56 Co sources produced by

deuteron bombardment of A1 or Fe at the Gottingen cyclotron. The photoexcitation of

23 nuclear levels has been observed and the decay properties and groundstate widths of

the majority of these levels have been determined. For the lead scattering target the co- herent elastic differential cross section has been studied in detail. There is evidence that below the photo-neutron threshold the elastic scattering via virtual photoexcitation of

the nucleus can be approximated by extrapolating the real part of the Giant Dipole Resonance amplitude along a Lorentzian curve. Coulomb corrections to Delbrtick scat- tering seem to play a small role at 6.5 MeV.

2.60-6.76 MEV

Table 4. Properties of levels observed by photoexcitation, [da/d experimental differential cross section per identified isotope or element for resonance scattering through 0=90° /*: spin-parity of excited level; W[&)\ angular correlation function; g = <2/„ -I- I)/(2/

t + 1); rQ

: radiative groundstate transition width, f: total level width. Errors in the

last digits are given in parentheses

Isotope £7(MeV)

(da/dC2)N*f

(pb/srl r r0/r' iv(©)g

r

0

2/r r0f (meV) (meV)

r*1 0 (meV)

238 U 2.754 13 (4) (i) 0.77 0.145 0.084 _

238 U 3.254 421 (5) 1- 0.24 0.83 1.5 0.52( 15)d 20, Bi 6.555 2.1 (4)- 102 - - 0.74 0.74 b -

20, Bi 7.168 1.7 (3)103 9/2 4 * 1.00 710 786 820 (40)*

203T1 6.418 8.75(30)- 10 3 1/2* 0.28 30 102 82 (15)* T1 6.759 7 (3) - - - - - Hg 6.555 68 (17) - - - - -

186^y 6.418 5.2 (3)- 10 2 1-* 0.32 1.75 2.4 -

l84w 6.555 9.8 (10). I0 2 (1) 0.52 3.44 2.9 -

1S4 W 6.759 46 (10) (1) 0.58 0 17 0.13 -

l81 Ta 3.010 174 (.17) - 0.72 0.42 0.59 -

18l Ta 6.418 62 (4) - 0.73 0.2 0.27‘ - ""Ta 6.759 4.8 (12) - - -

'* 0.018 0.018° -

lb5 Ho 6.418 10.3 (30) - - 0.035 0.035° -

l65 Ho 6.759 5.6 (14) - 0.021 0.021° - Nd 2.754 2.6 (5) - - - - - Nd 3.254 14.0 (10) - - - - - Ce 6.759 13.4 (10) - - - - -

121 Sb 3.452 2.20 (5)- 103 - 060 2.9 4.9° -

100 Mo 6.418 1.53 (4)- 10* 1-* 0.88 52 26 25 (8)* ’*Mo 6.555 4.4 (4)- 10 3 (1) 0.33 15 21 - Mo 6.759 6.2 (15) - - - - Mo 7.168 8.2 (26)- 10 2 -

/ - -

I [11] b W[0) g ro/T =1 assumed c \V{0)g = \ assumed

II [28] la small correction has been applied to the data of [28])

* Upper limits in case not all the transitions to lower levels were observed

' Present work * Previous work

form M9S-4IS

<R EV. 7.1 «.«4I USCOMM.OC 24 0 1 0- P64

(OVER)

PHOTONUCLEAR DATA SHEET 170

U.S. 0EPARTM5NT OF COmMcp>C- NATIONAL BUREAU OF STANDARDS
Table 1. Differential cross sections for elastic scattering [da dQ)’'" of photons from 56 Co and -*Na sources by different scattering targets,

in units of pb-sr. Errors in the last digits are given in parentheses. 9

deg

Scattering

targets 1599* (MeV)

2.754 9 (MeVi

3.010* iMeV)

3.202* (MeV)

3.254* (MeV)

3.273* (MeV)

3.452* (MeV)

90 23SJJ 52.7(25) 57.5(25)-' 56(16) 47(4) 456 I10)

c '34(6) 49(14)

20, Bi 33.1(30) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33(15)

"*'Pb 31.5(23) 31.0(16) 35 (8) 27(3) 26.6(22) 25(4) 23 (8) “T1 31.5(33) - 27(12) 32(5) 24 (3) 22(7) 34M5)

"*‘Hg 30.0(27) - 24(10) 28(5) 25.5(18) 26(8) 20 (8) “'W 22.5(11) - 17 (7) 19(3) 18.4(15) 18(5) 21 (6) 19l Ta 20.0(15) 19.2 (6) 193 ( 20) c 20(4) 17.3(21) 18(5) 21 (8) l93 Ho 15.9(13) - 17(10) 13(6) 15.6(20) 18(8) “'Nd 11.4 (7) 14.2 (5)

d 15 (7) 14(3) 24.2(1 2)

d 13(3) 9 (6) “Ce 11.1 (9) 11-0 (5) - 11(3) 9-5(13) 8(4) IZ7j

8.4(10) 8.6 (5) - 9(2) 7 (1) 5(3) _ "*'Sb 8.0(11) - - 10(4) 6.8(19) l,270(50) c “*‘Sn 6.5 (7) 7.0 (5) 5(2) 7.6 (8) 6(3) _ MtCd 6.2 (5) - - 6(2) 6.6 (8) 7(3) - 120 “»U 55.1(25) 64 (4)

c 43(15) 55(5) 574 (10)

c m

48(5) 48(11) Ta 27.5(15) 25.0 (9) 227(20)- 22(5) 21 (2) 22(8) “'Nd 17.9(30) 17.0 (9)

d - - 29.8(47)“ • -

* »iCo source in Fe lattice 9 “Na source in Al lattice (part of data have been published elsewhere)

c Transitions to excited states observed in addition to the ground-state transition

d Photoexcitation of nuclear level identified from the size of the differential cross section

Tabled Elastic differential cross sections da d(2[9 =90°) in pb sr measured with the Ti(n.y) source and compared with theoretical pre- dictions. n: predicted number of levels in a J£ = 25eV interval at 6.5 MeV. Errors in the last digits are given in parentheses

Scattering

target

6.418 MeV 6.555 MeV 6.759 MeV 7.168 MeV n

exp. th. exp. th. exp. th. exp. th.

2J«U 23 (12) 10.3 _ _ _ _ _ 45

2°v Bi - - 1J 5VJ vC 8.0 12 (4) • 7.4 1.5(3)- 10 s 9C 5.7 0.1 "*‘Pb 7.0(15) 8.6 - - 6.5(11) 7.4 - - 0.05 “Tl 2.586 (92)* c 7.5 - - 13 (3)

9 6.0 - - 0.4 "*‘Hg 12 (3) 7.8 74( 1 7)

9 6.5 6.7(15) 6.4 - - 3.4 "*'W 159 (10)*- c 6.6 306(33)* c 6.3 20 (2)*- c 5.6 - - 13 “'Ta 68 (4)*- c 6.3 - - 10.1 ( 12)

9 c 5.3 - - 28

l95 Ho 15 (3)

9 4.7 - - 9.5(14) 9 3.9 - - 18

"*'Ce 4.1(21) 4.1 - - 17 (l)

9 c 3.6 - - 0.04

u,Sn 4.2(13) 3.0 - - 2.5 (5) 2.7 - - 1.9 “'Mo 1,474 (44)* c 2.5 407(39)*- 2.5 8.5(15) 9c

2.3 817(258) 9 c 2.0 0.5 "*'Zn 2.4 (8) 1.6 - - 1.8 (5) 1.5 - - 0.3

* Transitions to excited states observed 9 Photocxcitation identified from size ol differential cross section

- Photoexcitation reported in [11]

ai

iZ 171
REF A. Lepretre, H. Beil,

' I. Hal pern

Nucl . Phys. A390 , 221

R. Bergere, P. Carlos,

(1982)

J.

methoo

Fagot, A. Veyssiere, EL EM. SYM. A z

Ta 181 73

REF. NO. 82 Le 3 egf

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN N0X 30-140 D 30-140 MOD1

4PI

See also A. Lepretre et al . NP A3 90 , 240 (1982) MULT ANAL 81 LEI

Abstract: From event-by-event records of observed photoneutron multiplicities for photons from 30

to 140 MeV on several heavy targets (Sn, Ce. Ta and Pb), it was possible to determine the mean

number of photoneutrons, P, for each photon energy and the widths W of the multiplicity

distributions. The mean neutron numbers increase smoothly from about three to six over the photon energy span for all four targets. The widths go from about one to two neutrons in the same interval. When these measurements are combined with other photonuclear information, it

is possible to extract the average numbers of fast neutrons and fast protons and the average number of evaporation neutrons emitted per photoabsorption.

E PHOTONUCLEAR REACTIONS Sn, Ce, Ta, Pb(y, xn), £ = 25- 140 MeV; measured

photoneutron mean numbers, width distributions; deduced fast evaporation neutron, fast proton average numbers. Monochromatic photons.

Table 2 Photonucleon emission features for four targets at 70 MeV

Sn Ce Ta Pb

u 4.3 ±0.2 4x0.2 4.5 x 0.2 4. 8x0.

2

Ff 0.50±0.1

1

0.59x0.13 0.71x0.16 0.66x0.15

0.24x0.05 0.26x0.05 0.27x0.05 0.23x0.04

3.8 ±0.3 3. 4x0.3 OJ oo H UJ 4.1 x 0.3 Eh Me VI 23.4 ±5 26.3x6 28.7x6 26.6x6 £* (MeV! 46.6x6 43.7x5 41.3x5 43.4x5

(See caption under table 1.)

Experimental data are taken from ref. *) and fig. 2 of this paper, v stands for neutrons and ir for protons; f stands for

fast particles and s for evaporated particles. £* is the residual

excitation energy after all fast particles have escaped - carrying

with them energy £,. The coefficients a and 0 have to do

with the ratio of fast neutrons to fast protons that are emitted. They are explained in the text. The uncertainties in this table are statistical only.

/

(OVER)

form N3S-41I

(REV. 7-1 4»44> U5C OMM-DC 2001 0-P64 PHOTONUCLEAR DATA SHEET 172

U.S. DEPARTMENTOF COMMEPCi

NATIONAL BUREAU OF STANOAROS
Ce

Ta Pt>

Fig. 2. Average experimental photoneutron multiplicities i-iE,! plotted against photon energy Ey, for

25 MeVs£, < 140 MeV. Data points were evaluated using results from ref. '). The full line represents

a smoothed' average behaviour. The dashed line represents ^ E,i values, measured in the giant dipole resonance 1 GDR 1 region, in previous Saclav experiments ). Fig. 2a: Sn; fig. 2b: Ce; fig. 2c: Ta; fig.

2d: Pb [where the 3 point refers to the SIN

lw

l measurement with stopped ir'].

Sn Ce

Ta Pb

Fig. 3. Widths. WiEy ) of the experimental photoneutron multiplicity distributions as a function of the photon energy Ey

for 25 MeV « Ey s 140 MeV. Data points were evaluated using results from ref. '). 173

The full line represents a smoothed average behaviour. Fig. 3a: Sn; fig. 3b: Ce; fig. 3c: Ta; fig. 3d: Pb.
ref U. Zurmlihl , P. Rullhusen, F. Smend, M. Schumacher, H.G. Bonier

Phys. Lett. 114B, 99 (1982)

METHOD

EL EM. SYM.

Ta 181

REF. NO. 82 Zu 2

73

egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE NANCE TYPE RANGE

G.G ABX 3-6 D 3-6 SCD-D DST

SOURCE 141 PR(N,G)

A procedure is presented to determine total photoabsorption cross sections a t by resonant scattering of 7-rays. It is shown that o t follows along the GDR lorentzian line down to 3.5 McV. Indications for nonstatistical deviations from the

lorcntzian line are observed.

Fig. 2. Total photoabsorption cross section for 181 Ta and

l6S Ho versus energy. Curve a: extrapolated lorentzian according to ref. [13]. Curve b: total photoabsorption cross section predicted by the Weisskopt" model with hindrance factor

3 X l O'5

.

t

form N3S-418

(REV. 7.14.441 USCOMM.QC 26010-P64 PHOTONUCLEAR OATA SHEET 174

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STAMOARDS
w

TUNGSTEN

Z=74

The word wolfram was first applied to the ore iron-manganese

tungstate as described by Lazarus Ecker in 1574. The term

refered to its "wolf like" nature in "devouring" tin and

causing low recoverage rates in the tin smelting operation

(the ore inhibits the reduction of tin oxides).

The word tungsten was first applied to the mineral calcium

tungstate. The term was derived from the Swedish words

tung(heavy) and sten(stone).

w

w

175
, ' _ i. = .
Ref. W.H. Hartley, W.E. Stephens, E.J. Winhold

Phys. Rev. 10^. 178 (1956)

Elem. Sym.

W 7b

Method Li (p/y) source, 480 kev protons. BF^ counters

Ref. No.56 Ha 1 EGF

Reaction E or A E s

a 6 E J n Notes

Average Li cross section is 5^5 mb; cross section with detector response

weighted for low energy neutronSjiSi

Assumed ratio 17*6/l4.8 = 1.7*

Calculated cross section at lk.& and

17*5 MeV assuming cross section

curves measured at Pennsylvania and

Saskatchewan (refer Table i).

TaSU I. Cross sections for photoneutron emission induced bv the lithium camma rays. The results are comnared with prevn

3etatron data

Present cross- section data Pennsylv•an,

a

Saskatchewan

Counter Counter

FI. 1

e*e"t Group A Group B *t ui .• . M," <y i r , *„ 4»

rsFC J8 mb 33 mo 37 mb (jO 1 ml) 0.5 7 ; ps.. 17 ~ rC0 40 49 47 hO mb 0.5 95 r 0.5 .Si 23 25 23 40« 0.7 „Cu 64 61 55^12 95 f 0.6 45 ,/n 48 45 43 O0r 0.7 58

1/5 170 135 240f 1.0 175 *Sn 200 190 180 ,U 355 360 260 350d

1.3 420* 2.3 420 j 52'i'

..vv 365 355 325

240*

•wVa 330 295 315* 1.7 480 f 1.9 460

-ii* 365 340 290 „rb 310 295 250 320* 1.6 440 f 2.5 400' 250'

si Bi 305 280 250 270d 2.6 550f 2.4

50i)i 400

200* 195

• ^reference J. ?£?mefm4

24* and ,7A' MeV cro” w,on* with relative intensities of the lithium gamma-ray lines.

« R. Nathans. Ph D. thesis. University of Penn «y| vania. 10S4 (unpublished).

• I Kali-em (private communication).

1 See reference 2J.

• See referenre J2. " " 17 '' 176 Mev M obt.inrd 1 TM Cr«. A data and 14.8/1 7 6 betatron t •"blamed using 14 R-I7.6 cros«-*ectinn ratio iron Pennsylvania betatron data

i Obtained using 14 R/17.6 cro*i-<*ctmn ratio inm Saskatchewan oetatron data.

I 1

sanction ratios.

form HBS*418

14-1-43) USCOMM-OC 14584-PSS

U.S. DEPARTMENT of commerc

NATIONAL BUREAU OF ST ANOARC PHOTONUCLEAR DATA SHEET 177
Ref. K« Reibel, A.K. Mann

Phys. Rev. 118, JOl (i960)

Elem. Sym.

w ?4

Method Ref. No. Y's from F^^(p,aty) reaction; protons from Vande Graaff; Nal« 60 Re 1 JHH

Reaction E or AE

S"

dE J

it Notes

(E

p» 2.05 MeV) » 1.8 ± 0.4 mb

form NBS-418

(8-1-63) USCOMM-DC 18S56-P63

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 178
R.G. Baker, K.G. McNeill

Can. J. Phys. , 1158 (1961)

METHOD „ . ,

. Betatron; fast neutron yield,

detector; ion chamber

angular distribution; Si threshold

EL EM. SYM. 1 A

w

REF. NO.61 Ba 2

; 7^

j

1

I NVE

REACTION RESULT EXCtTATION ENERGY

SOURCE OETECTOR

ANGLE

TYPt RANGE TYPE riANCE G.XN ABY THR-22 C 22 THR-I 5-+

In Table K:

a = average cross section of detector

weighted with neutron spectrum

c = neutrons/lCQ roentgen/mole

W(0) = a

o Y

[1 - A

q

Pn

(cos 0)]

n=l

TABLE IV

L.rf.ieni

I! c«

III IV

a t V(<H>)X1C** Vi

u>ui (22 Mev)X10*

vr

*but/-Vu

2-15 1(i±0.06) 0.01 ±0.08 -0.00±0.i0 6. Co 0.21 0.12

-.:£w.r«K2iV* 104 1 ;i±o.o3) 0 . 04 ±0 . 04 —0.05 ±0.05 4 . 0i> 0.17 0.10

*v:«tr.ganese 308 1[1 ±0.02) 0.07 ±0.03 —0.09±0.04 7. 61 0.25 0.12

icon 200 1(1 ±0.03) 0.05 ±0.04 —0.17 ±0.05 4.94 0.18 0 .11 Cobalt 3901[1 ±0.02) 0.08±0.03 —0.22 ±0 04 9.63 0.26 0.15

Nickel 1451[ 1 ±0.05) o.07±o.o: —0.23±0.09 3.58 0.12 0.12 Copper 347111 ±0.02) 0.05=0.03 —0.20 ±0.04 8.57 0.30 0.12

Arsenic 48211 1 ±0.03) 3.11±0.04 —0.24 ±0.05 11.91 0.33- 0.15 Rubidium 6381[1±0.05) 0.13±0.0G —0. 14±0.08 15.76 Strontium 4091C 1 ±0 . 05) 0. 10±0.0G —0.17 ±0.08 10.10 Yttrium 2901:i±o.io) 0.08±0. 12 —0. 12±0 15 7.16

Silver 5901:i±o.o4) 0. 10±0.06 -0.22 ±0.08 14.57 0.87 0.07 Cadmium 9051 1 ±0.02) 0.02 ±0.02 —0.26±0.03 22.35

Iodine 11331 1±0.03) 0.04 ±0.04 -0.29 ±0.05 27.99 1.42 0.08 Barium 10481 1 ±0.04) 0. 10±0.06 —0.38±0.08 25.89 Lanthanum 15051!l±0.02) 0.02 ±0.03 -0.42 ±0.04 39.40 1.04 0.15 Cerium 13101;i±o.o5) 0.05 ±0.00 —0.39 ±0.08 32.50 Dysprosium 1652 (’l±0.0S) 0.04 ±0.10 —0.34±0. 13 40.80 Tantalum 1558 (;i±o.o2 ) 0.04=0.03 -0.22 ±0.04 38.48 2.50 0.06 Tungsten 1365 < 1 ±0 . 02

)

-0.07 ±0.03 -0.24 ±0.04 33.71 Mercury 1345 (;i±o.o2 ) 0.04 ±0.03 —0.31 ±0.04 33.22 Lead 2274 < ldbO.Ol) 0.02 ±0.02 -0.42 ±0.03 56.17 2.72 0.08 Bismuth 2i62 1 ±0.02) 0.05 ±0.03 —0.45 ±0.04 53.40 3.36- 0.06 Thorium 3031 1 ±0.04) 0.06 ±0.05 —0.32 ±0.07 74.87 Uranium 4630 (!l±0.02) 0.05 ±0.03 —0.17±0.04 114.36

*(}«) m 3.47X10* «* miUtbara-nratreo. Error* are itnndard error* due to counting Atatiitle* only.

U.S. DEPARTMENT OF OC. 'VERCi NATION.. AUHEAUOF iT.-l.uAFO: foam NBS-41E

(REV. 7-1 *.**) uicoiaooc m PHOTONUCLEAR DATA-SHEET 179
Ref. VoGc Shevchenko, B.A. Yurev

Nuclear Phys. ^1, U95 (1962)

Elem. Sym.

W

Ref. No. 62 Sh 4

7^

Method 35 MeV betatron; emulsions

JHH

Reaction E or A E <7d E J

rr Notes

w (y,p) Bremss.

22 o 5 33-5

Parameters a, b and p for

uu(0p) = a + b sin^0 (l + p cos0)^

in Table I.

tip (nsr.«)

\ 7U \

Coeiiicientd of expressions o i type ,1 nppr,, contribution i’rom i la

ctiei.a a.-.u Ljtimates c: the

Element Z vMeV) L, eotrjl CL 'j ? g^i — C2"; i;D

3.25-9.2

5

1.9 0 0 0

. 22.5 Rh 45 > 9.25 2.3 1.9 0.2 i

3.25- 9.20 12.2 0 0 9

33.0 > 9.25 4.5 3.7 1.2 5s 39

4.0-7.20 1.4 0.7 0.42 3 22.5 7. 20-11. 23 2.9 4.4 0.22 2 Pr 59 > 11.20 1.5 3.4 9.44 4

4.0-7.25 3.3 1.2 1.9 as 10 33.5 7.20-11.23 4.2 1.03 2.2 as 00 >11.20 0.3 1.2 l.S as -.9

G.20-S.70 0.3 9 0 :) 22.5 3.75-12.75 2.S l.G l.G as 40

'.v 74 >12.75 2.2 0.0 £.-•> 5s 05

0.20-3.70 1.2 0.05 ,.-t4 - = 33.5 S. 75-12. 70 1.3 O.S0 2.G a 00 >12.70 0.05 0.0 3.4 as 70

u.20-3.70 O.ii 1.9 0.4 ;; 22.5 3.70-1 1.70 2.3 1.9 L.2 as 20 >11.70 i .4 t..0G 2.0 as 00 ?t 7S 7.20-1 4.20 2.1 1.1 2.G as 00

33.5 >U.20 9.0 '\3 ^ 70

22.5 5.25-1 *.20 1.95 9.70 r,x as 10 ?b 32 > i'J 20 -,.70 o 70 2.2 as 50

0.20-10.20 1.9 1.2 1.2 •a: 20

33.5 1O.20-U.25 L. 10 0.G5 3.0 --s 00 > 14.20 i.0 1.0 2.3 a. 7 u

TAr.zs .> Measured photoprotor. yields and compn.ison v.at.. L.-iCimai-cs tr.c muLic.a oi ration ar.c

:;>ct ?! EMmosit *V~« • . Uvi;, .

1 v\f. - -U-cci Rh- 0-4 22.0 !--- ^ 3 at J 35.0 2.4 Lb' -v •. a. 4,0 ";1U

.. in 33,0 1.3. !iU ^ 20 * 9

J7..i 2. iU ..3 lu-

' • i-' 1 • •" -/' -u i.i

l’t 33.0 v».i> U.S ; i a Pb 22.0 2.9 - M L . v,

1 i

*'*' 33.0 • •2 . Ur c, + 20

i

. The yield Vns9 is expressed tn proton.-, our mol per Rw»;n /» i\

i u-i- -i'i -

r:^'. 0. Angular distribution.-* ot photoprotons MeV arc denoted by solid uow tor — n.20-,

ar.ci by crosses tor > la’. 70 McV. For tin

iT? = G.20-S.70 McV, open triangles =

from W. The experimental poir.ta tor . .70 McV, by seku squares :or E3

- o.‘ ease = 33.5 .McV c-.nttea c .70-12.70 .McV and open square.-* ccaoa

McV.

1) M.

2) M.

3) W.

4, .\r. 0) E.

0) R.

~i A.

3) V.

:or

0) E.

10; V.

References

E. Toms and W. E. Stephens, Phys. Rev. 9S fii)00) 026 M. Hciiman and A. G. W, Cameron. Phys. Rev. 92 (1003) 1134

C. Barber and V. J. Vannuyse, Xuclear Physics 16 (LOGO) 33

1

E. Toms and W. E. Stephens, Phys, Rev. 92 (1003) 3G2

D. Mak'anovsky, jET? 23 (10G0; 00

3. Taylor, Xuclear Physics 19 ilOGo) 403

G. W. Cameron, W. Harm* and L. Katz. Phys. Rev. S3 (1001; 12C4 G.’Xoudachiu, V. G. Sheveneako and X. P. Yudin, Report a: the Second All-Union Conf. Xucicar Reactions at Low ana Medium Energies. .Moscow, 19G0

D. Courant, Pays. Rev. .32 (1001; 7i»3 V. Balashov, V. G. Shevchenko and X. 1\ Yudin, JETP -il flOGi) *029

form NBS-418

(8-1-«3> . USCOMM-OC 18B9S-P83

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 180
Ref. V.G. Shevchenko, B.A. Yur'ev

Vesta. Mosk. Univ., Ser. III. No. 3. 90 ( 1962 )

Elem. Sym.

w 7^

Method 35 -MeV betatron

Ref. No. 62 Sh 6 JHH

Reaction AE <7 d E J

«• Notes

W(7,P) Bremss.

22.5

33.5

10.0

10.0

hn puc. 2 ::pc::cTun.iciiu ao.iyiciiiiuc vr.ionuc pacnpe.ic.ieimH <t>oTonpoTouo.»

'n.i.-.ipuuax liu oGoitx puc\.:k..x

ipa.u'Zv.abi ro.iuxo CTaTacni'iccNiic »;uau*

kit ii:»N:cpoaii;i Mopca sKcnc|iiiMc, i7a.

- ibiiaitf TcviKn 11 a -nc. 2 npoucjciiu annpoKc:iMiipyiciiiiic Kpuuue rana a 4- b sir.:0

i‘; - pcosOi*. napjMcrpu KOTopux apit : 3Cae::u a raoanuc. npuncjciiaoc aupa-

<Kciitia npiiO.r.ixioiiiio omicunacT yr.muui

,>acnpc.ie.noiiaa ;:;mi yc.iooaa mircpocncu* uaa El a El nnr.inuittiiiisi. nniiMCM i K =» — o£

a L

. iicxo.i* m »rorn 6u.m cac- nucuKa ax.iaaa El nor.iouici.au. np:i* .KMcanuc a ruiV.auc. !!a puc. 1 a.iauo. mtc

. laaib v.a.io #av -rnwuast rpynns npoToiton

.0.25 —8.73 .W./i»i .imcvtt ctiuxcTpa'iiioc or* .locnrcnamu *.*» j 1 ‘T.’uooc pacnpo.ie.ienae

ii uK ::pa ouv> .cna.i c C = -2.3 .*l.w T 3 K 3 C.iv: 33.5 Alia. 3ro •max yxaJUAacr aa Jinr.o.ibHhiU xanaKTcp no* "Ou.e;..:^ v-kaaaT03 npu oGpaaoaaiini’

ia."0'.Hc --rii , ...:4\ r.poroitoo Oaar.no rpvrt* ^ >iiv naia—x npOToaoa /iii.c c 3 aciim y Mu \* a. rasnayruMn r.ncpea. npu*:eM caaar '..‘>3* pscracr xaK c ' ae.iiisemtcM >ae?raa ;:r>

TOiiOD. rax a 0 3c:;; , a

, isaeM c _-j X 3:»

caniaao. xa* aaaao ;:3 rafoaubi. c poc- tom » r.aapvnor. bat »ro o . o*

3r.aa 1r. 1 n :pa 0C.1

»aepr;:‘ia;x • wtouou

__. v = >3.5 .'Ijj.

Angular distribution fitted to

a + b sin^d (l+pcosS) 2

.

I Nrror ' 2-.- y- 8)

do —

Toia.a i.

,...*c:—

<7 8 10 1 Z

9ifC. 1. 3'rcpr»-, TiVKrNi:v p .:c:' :"«ror!POTOi!on H3 U"

o,2.» —o . . 0 8.75—12.7

12.73

O.S

1.6 2.6

o3.5 6 .73—8. 1 .2 3.;

I.! 2 ,«» l.u

°-: 4

a.-i - 1 0

! .Mcocasm rn-xo.ioa $OTOiipo7n::0B ::i U“ ..:.in lanm-ana 2.6*

.. /3/\m.;b — pciiTrcii epu E . niax »22..> >0.0 *.'».» cooTocTCTjeir.io. peer auxoja yajjojnneT 11 a cytaccTnouiic.o yac.ia*icii.»c ccNOiiaa ::;>»« £.>22.5 M.»j. r. c :omo.:acT c^c.iarb auuoa 0 tom. »;to MaKCiSMVM vv.cinin oopa.iounmin tporonimroiioa

3 ii' aaxor.JTcr. auuie 22.5 Mju. 3m acxo.iaTca n cor.ir.caa c :>c3v.i«»T0Tn\:a. no.iycira-*

:.t 2.V.1 '2;. a c aaiiUbiMH o ccNcmiax «y. > 1 -•'ca.raa.i ;.a 7W/Kc.ii4X aapa.x [4—5j.

-..iM wopaooM. r.o.iy .ciiiiuo pejy.iuraTU >Na.»u:i.iioT. '.to cc'ieiiae pcaxiiaa iy. ;n uj

..v.ccT :a«ciiMy\i :;pa £.>22.5 Mm a '.to aoi'.ioiacaae y-K.iaiiToo u ^to.» oO.iacT;.

s ocao.iao.M xaajpyno.ibHUii xapaK*cp.

.1 1

1

T E P A T V P A

a G,5 • 10» ::;ioto* TaKoa laa'iaic.iLau.:

U‘ aMcui

form NBS-418

(8-1-63) U3COMM-OC 188S6-P63

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 1 81
I C.frt . -) I T. Kaminishi, C. Kojima

Jap. J. Appl. Phys. 2, 399 (1963)

W 7^

METHOO

Linac; isomer yield; activity

REF. NO. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G/ RLY 1 C 5 ACT1

l+PI (0.20, 0.17,

0.12)

Table II. The isome rs observed

Observed value Referenced value111131

Half-life Energy (MeV) Half-life Energy (MeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.161 Br-79m 4.80 sec 0.209 4.8 sec 0.208 Sr-87m 2.3 hr 0.390 2.8 hr 0.388 Y-39m 15.0 sec 0.920 14 sec 0.915 Rh-103m 58 min * 57 min •0.040 Ag-107m \

1 44 sec 0.094 Ag-109m > 42 sec

f 0.95 40 sec 0.088 Cd-lllm 47 min 0.150,0.255 49 min 0.150,0.247 In-115m 4.5 hr 0.335 4.5 hr 0.335 Sn-117m 17 day 0.160 14 day 0.159,0.161 Ba-137m 2.6 min 0.660 2.6 min 0.662 Er-167m 2.10 sec 0.209 2.5 sec 0.208 Hf-179m 18.5 sec 0.157,0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 5.5 sec 0.1025,0.2915 others Ir-191m 4.90 sac 0.129, <0.07 4.9 sec ; 0.042-0. 12S Pt-195m 4.5 day 0.065** 4.1 day

j 0.031-0.120 Au-197m 7.0 sec 0.10,0.27,0.40 7.2 sec

| 0.130,0.270,0.407 Hg-‘199m 43 min 0.160,0.370 42

1 min i 0.158,0.368

I

* This isomer was measured with a G-M flow counter.

*» This value corresponds to Pt-K X-ray energy.

Table III. Induced activation rate

Element) Beam 1 energy (MeV)

j

Counting rate,

( x 10000 cpm, Sample form

1 Se 5 1300 metallic m. . Br 4 1600 _\e.£r Sr 6 0.3 SrCOii pcwGcf Y 5 90 metallic grain

Rh 5 i 0.2 V

s RhC!.. grain

Ag 5 180 metallic plate Cd 6 0.5 CdClt grain

[n 6 3 metallic plate Sn 6 0.0005 metallic plate Ba 5 0.6 BaS powder

Er 4 4900 ErjOj pow-.e. Hf 5 1600 mcIGiliC W 5 120 metallic .

• v. der

Ir 5 2100 ly.winilic powder

Pt 5 0.3 metallic plate Au : 4 1 4300 metallic plate Hg

1 6

j 0.09 metallic liquid

re*M N8S-41* * The value measured with a G-M flow counter. mev. 7-it.Hi i« 0MM.o« uoio-M4 rnu • uhullcaR DATA SHEET ,32

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR A U OF STANDARDS
Ref. V.G. Shevchenko, B.A. Yur'ev, B.P. Levkin

Zhur. Eksp. i Teoret. Fiz. kb, 808 (1963 ) Soviet Phys. JETP JJ, 5^7 ( 1963 )

Elem. Sym. A Z

Method

W

Ref. No.

7^

35 MeV betatron; thin Csl(Tl) proton counters. 63 Sh 1 JHH

Reaction

(7,P)

E or AE

15.5-33.!)

E = ^0.$ W 28

dE

50±10MevMb

I

30MeV-mb

2k

33

15.5

J

rr Notes

E = 7HeV.

^max= ~ 2 0 2mb; El + E2

/"max = ~ if-.

3

mb; mainly E2

Yields measured at 120° and 150°;

background subtracted; corrected

assuming (y, p) angular distribution

from Shevchenko and Yur'ev,

JETP 16, 609 ( 1963 ). (See 62 Sh 3 )

Measured reaction yields (in relative units). A smoothed

yield curve is drawn through the experimental point (dashed). The excitation function a(Ey) is represented by the continu- ous curve.

form NBS-418

(8-1-93) USCOMM-DC 18BS8-P83 PH0T0NUCLEAR DATA SHEET 183

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAL OF STANDARDS
r ef. H. Go De Carvalho, G. Cortini, E. Del Giudice, G. Potenza, R. Rinzivillo, and G. Ghigo

Nuovo Cimento _^2, 293 (1964)

METHOD

ELEM. SYM.

REF. NO.

74

64 De 4 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.F ABX 300-999 c 300- qqq RMii-n ?oo-qqq 4PI

Table I.

Nuclide Bi 209 W 184 Ag ! Number of runs 3 2 1

| Number of atoms cm-* ~ 2 • 10»

-

10**

i Total number of tracks — 6000 ~< 500 ~100

Cross-sect ions per equivalent quantum, <rg

. at 1000 MeV (uiillibarus) 12.2-0.7 1 ±0.1 1

!

j 0.1

Cross-sections per photon, ak , between 300 and 1000 MeV (millibarns) 7.8 ±0.8 0.65±0.11 j ~0.05

Fissility •l.l 0.12 0.012 <0.0016

Fi". 4. - The W photofission cross-sections per quantum equivalent at 600, 650 and 1000 MeV are

kiiven by the full squares. The data can be fitted roughly with a curve corresponding to a constant

value of the dssility.

form NBS-418

(R EV. 7-1 4-641 USCOMM-OC 26 01 0-P64 PHOTONUCLEAR DATA SHEET 184

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST ANOARD3
REF- G. Ben-David, B. Arad. J. Balderman, and Y. Schiesinger

Phys. Rev. l£6, B852 (1966)

EL EM. SYM.

W

A z

74

METHOD

Nuclear Resonance Scattering using N,G reactions.

REF. NO.

66 Be 3 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPl RANG! TYP| RANGE

G,G RLX 5

- 10 o

.^ o l/A • NAI-D 5

- 10 135

Fio. 3. Histogram of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemi cal symbol followed by the neutron numbers of the naturally occurring isotopes. Magic numbers are shown in brackets.

Table III. List of effective cross sections.

Scatterer Energy (MeV) Gamma

source

i (mb) Energy

Scatterer (MeV) Gamma

source

3 (mb) Sm'« 8.997 Ni 100 Sn 7.01 Cu 110 pr ui 8.881 Cr 9 Nd 6.867 Co 30 La 8.532 Ni 6 pr

itt 6.867 Co 3 Te 8.532 Ni 3* Te 6.7 Ni Cu 8.499 Cr 24 La 6.54 Ag 12 Zr 8.496 Sc 3050 Cd 6.474 Co 110 Zn 8.119 Ni 13 Mo 6.44 Hg 25« Sc 7.817 Ni 50 La 6.413 Ti 72 Sc 7.76 fC 90 Mo 6.413 Ti 10 Sb 7.67 V . . .b Tl 6.413 Ti 25

Cri 7.64 Fc 40* w ~6.3 Ti . . .b PCI 7.64 Fe 7* Sb 6.31 Hg

pr ui 7.64 Fe \2* Tl 6.3

1

Hg 2* Tl 7.64 Fe 370* Sn 6.27 75 La 7.634 Cu 7 Pb*** 6.15 Gd Mo 7.634 Cu it Te 5.8 Ni . . .1 Bi11* 7.634 Cu 4 La 6.12 Cl 35 Tc 7.528 Ni 66< priu 6.12 Cl 110

Bim 7.416 Se 100 Pt 5.99 Hg 40*-c Bi** 7.300 As 80* Tl 5.99 Hg 5s Pb"* 7.283 Fe 4100 Pb»* 5.9 . . .b Cl 7.283 Fe 34 Ce 5.646 Co 17 Priu 7.183 Se 80 8i»» 5.646 Co 55 Tl 7.16 Cu 120 Pb*** 3.53 70 La 7.15 Mn 50 Hg 5.44 Hg 75«

Bi*** 7.149 Tl 2000 Hg 4.903 Co 385

rosu MBS-4II

I IP C V. T-l 4-441 'ISCOMM.rjC j«oin.r>4«

• High-energy component of a complex spectrum.

• A broad scattered spectrum with no observable peak structure.

• There are actually two lines of energies 7.647 and 7.633 MeV having

equal intensities in the iron capture gamma spectrum. The cross section has therefore been corrected, although there is no possibility at present of deciding which line is responsible for each resonance.

4 Is probably an independent level^In the complex spectrum of NI v

rays on Te.

• Rough estimate.

1 May be inelastic component from 7.32* level In Te.

• The relative line intensities In this case am dne to Groshev and

co -workers.

- J N°Jine is known for the source at this energy.

1 Difficult to resolve among the many source lines present st this enercy. PHOTONUCLfAR DATA SHLt. 185
REF‘ J. Maly

Physo Letters 35B . 148 (1971)

ELEM. SVM. A

W 74

METHOD REF. NO.

71 Ma 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

E,F SPC thr-999 D 500,999 FRG- I 4PI

999 = 1.3 GEV

Tablo 1 Estimated energies and cross-sections of fission fragment formations produced by 1300 MoV electrons

(doloctod on (B) foils) Bangv in mylar

(;im) (passing foil No.)

(O.foil) 55 jim

(4. foil) 67 Jim

(5. foil) 79 4m

(6. foil)

Estimated energy of fragment in McV

A - 25 A - 50 A - 75 A - 100 Z rn 10 Z m 20 2 -30 2- 40

4 79 185 294 301

89 222 362 484

10S 260 422 576

23.0 60.1 60.0 49.8

22.4 61.6 80.0 66.9 49.2 92.0 111.0 111.3

92.6 192 302 433

99.7 203.5 31S 442

107 209 334 462

Cross section in fib U Pb W

3 X 10® Ox 10

3 400

1.7 2.2 4.1

1.8 1.0 1.2

3.6 1.2 1.8

£ldn from Q values (M«V)

Kinetic energy from fission of: 186*

208pb

238,,

**Sab (MeV)

B,

, tar fusion with: 1-b 18**

208pb

238..

[over]

form NBS-418

(REV. 7-14-04) USC OMM-OC 26 0 1 0- P04 PHOTONUCLEAR DATA SHEET 186

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Fig. 1. Penetration of fission fragments through mylar

foils from fission induced in U, Pb and W by electrons and bremsstrahlung. Explanation of symbols: Cf spontaneous fission O; U fission front foils A and bacx foils A; Pb Fission front foils and back foils B; W fission front foils O and back foils O . Symbols with arrows (e.g. O) denote background level.

187
V. P. Kovalev, V.P. Kharits, V. V. Gordeev, V. I. Isaev (USSR)

Atomnaya Energiya 32, 496 (1972)

W 74

METHOD REF. NO. 72 Ko 8 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N NOX 6- 22 C 22 THR-I DST

Mnajcub

3nop- nm

KICK* TpOnoB,

3cTCKTOP

Vron, apad

b/a

30 50 70 90 no 130 150

Al

22,5 P31 (/», p) 1,05±0,08 1 ,03±0,08 0,97±0,03 1,0±0,08 0,9S±0,08 1 ,02±0,08 1 ,04±0,08 IIooTpon1IOO

22,5 Al27 (n,p) 0,90±0,15 0,95±0, 15 1,02±0,15 1 ,00±0,14 0,9G±0, 13 1 ,07±0,13 1,01±0,13 »

Ti

22,5 i 1,04 ±0,07 0,9G±0,07 1 ,03±0,07 1,00±0,07 0,9S±0,07 1 ,05±0 ,0/ 1 ,03±0,07 »

22,5 Al-7 (n, p) 1,06±0,13 0,94±0, 13 1 ,04±0, 12 1,00±0,12 0,95±0,11 0,93+0,1

1

1 ,02±0,10 ••

Cu

12,3 P31 K P) 0,97 ±0,10 1 ,04±0,10 1 ,02±0, 10 1,00±0,10 1 ,013=0,10 0,90±0,10 0,9G±0,10

17,0 P31

( «, P) 1,03±0,07 0,D7±0,07 1 ,00±0,07 1 ,00±0,07 1 ,0G±0,07 0,95±0,07 0,S8±0,07 »

22,5 P31 («.p) 0,S7±0,05 0 ,94±0 ,05 0,97±0,05

j

1 ,00±0,05 0,99±0,05 0 ,03+^0 ,0o 0,91±0,05 0,1S±0,04

22,5 Al« («./>) 0,75±0,00 0,SG±0,07 0,93±0,0G 1 ,00±0,05 1 ,02±0,05 0 , 94 -1- 0 , 04 ! 0 , 90 -0 , 04 ! 0 , 28 -1- 0 , 0(

;

i " 1 —

Mo

22,5 P31 («, p) 0,90±0,05 0,93±0,05 0,9S±0,05

j

! ,00 ±0,05 0,99±0,05 0,92^0,05 0,84±0,05j0,21±0,04

22,5 Al27 (n.p)j 0,80=0,03 0,05^0, OS 0,95 ±0.07 | 1 ,00±0,0G 0,94±0,05 0 ,83±0 .04 jo ,72±0 ,0ljo,44±0 ,03

22,5

j Al27 («,a)j 0,72=0,03 0,S4±0,0S 0 ,S9 — 0 ,03 1 ! ,00-1-0, OS

1 0,95±0,0S 0,S7—0,0S i0,G3-+-0,0Si0,7S-i-0,lSi 1 ~

W

22,5 P31 [a, p)

J 0,85 ±0,04 0,90±0,04

j 0,93±0,04 j 1,00-0.04 0,93±0,04 0,92±0.04 0,037 =0,04jo , 25 ±0 , 04

1 22,5 Al-7 [r., p)| 0 ,78—0 ,06 0,S4±0,QG 0,89-1-0,05 1 1 ,00—0 ,05 j 0,97-0,04

I 1 — 0, SO ±0,04 jo,75±0,04jO,54±0,uG

Pb

22,5jp=i(/t,.o)|0,79±0,04 0,35±0,04 0,9G—0,04 1 ,00±0,04 0,93±0,Q4

j 0,SS±0,04 }o ,8-i±0 ,0 ijo ,3G±0,05

22,5

j Al'i7 (n,

p)j 0,703:0,09 0,81±0,08 0,94±0,G7 1,00-0,00 0,94±0,0G 0,80±0,05 0,69±0,05j0,G9±0,12

form N3S-418

(R CV. 7-1 4»04) use OMM-N 0S-OC

(Over)

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 188
1,2

1,0

0,8

1,2 1,0 *§ 0,8 t

’>* \ 1,0 *§ 0,8 l

1,2

I

>5

1,0

0,8

1,2

1,0 08

1,2

1,0 ash

^4—i—i—i—i—

i

i——i i i 1 f fI I I I I I I 30 50 10 90 110 130 150 6, zpad

y rjonue pacnpcncarimn GMCTpux (JxrroiiciiTpoHon hs Al, TI. Cu, Mi, W. I’b, ou.ij'MiM'KMj ajeJCTpoitaMU c anepriicii 22,1 AJ»a. flcTCK- Top I*** (w, y) Si**.

189
ref. R.F„ Barrett, J.R. Birkelund, B.J. Thomas, K„S. Lam, and H.H. Thies

Nuclo Phys. A210, 355 (1973)

ELEM. SYM.

W 74

METHOD REF. NO.

73 Ba 20 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N NOX THR- 27 C 10- 27 BF3-I 4PI

Fig. 12. Experimental values of the level density parameter a, (Fermi gas formula plus pairing correction) versus atomic number A. The continuous curve is a least-squares fit to the data of a

theoretical calculation from Newton 13

).

MEAN NEUT ENERGY

1H. Baba and S. Baba, Japan Atomic

Energy Research Institute report

JAERI-1183 (1969)

.

2 H. 3aba, Nucl. Phys. A159 , 625

(1970).

15

T.D. Newton, Can. J. Phys. 34 , 804 (1956).

Fig. 15. Ratio avbJap versus atomic number A. Here aobt is the level density parameter taken from

the neutron resonance work of refs. ‘• 2 ), and a„ is the level density parameter derived from the present (y, n) work. Filled circles represent points where nuclei in the neutron resonance and in the

(y, n) experiment were the same. Open circles represent points where the respective nuclei were

approximately matched. Triangles represent points which are based on measurement of neutron mean energies at two bremsstrahlung energies only.

(over)

FORM N3S-418

(R EV. 7-1 4-C4) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 19Q

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 3 (continued)

Target N

(residual nucleus) *)

Goodness

of fit b

) no with

p.c. p.c.

£.(24) T

(MeV) e

) (MeV) d

)

"p (MeV“ 1 )*)

aob» (MeV-‘)f)

Ba 75 1% F 1.16 16.5-l3*Ba 15.39-l34Ba 0.93 77 2%

78 7%

79 8%

80 11%

81 71%

La 80 100% F F 1.25 0.72 15.5- l38 La 13.76-l39La 0.89 Ce 81 89% F G 1.24 0.70 17.0-' 3 9Ce 17.8 -,4, Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-‘ 4OPr 17.05-142 Pr 1.00 Tb*) 93 100% 1.15 19.3-li8Tb 21.85—ISOTb 1.14 Dy *) 93 2% 1.06 20.9-l6I,5 Dy 21.9 -l82Dy 1.05 94 19%

95 25%

96 25%

97 28%

Ho . 97 100% P G 1.06 0.56 21.4- 164 Ho 20.66-l6*Ho 0.97 Er») 95 2% 1.11 19.2-166Er 21.9 -t6S Er 1.14 97 33%

98 23%

99 27%

101 15%

Tm *) 99 100% 1.03 24.0-' 4 8Tm 22.58-,7<>Tm 0.94 Ta 107 100% G 1.00 0.49 26.0-' soTa 21.2 - ,8lTa 0.82 W 107 26% G F 0.98 0.50 27.0- l83 W 23.0 -,83W 0-85

108 14%

109 31%

111 28%

Au 117 100% G 1.19 17.5-' 94 Au 20.24-' 98Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-20 *Pb 10.1 -207 Pb 1.35 (Z = 82) 124 23%

125 52%

Bi 125 100% F 1.65 1.03 9.0-3O, Bi 13.8 -2l0Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (y, n) experiments.

b

) These give an assessment of the goodness of fit of a calculated £„ versus £0 curve to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

c

) Bremsstrahlung photoneutron mean energies £, for peak bremsstrablung energy £<> = 24 MeV.

d

) Nuclear temperature from fit with constant-temperature formula.

*) Level density parameter aB derived from the present (y, n) experiment, using a Fermi gas formula plus pairing correction, and corresponding residual nucleus (the atomic weight shown is the weighted average of atomic weights of the respective isotopes present).

') As column 7, but using data on n-resonance absorption from refs. I * 1

). *) Measurements of £„(£u ) for these nuclei were made only for £0 = 21, 23 and 24 MeV.

191
E. Hayward, W. Phys. Rev. C8 ,

METHOD

C. Barber, and Jed Sazama

1065 (1973)

W

REF. NO.

74

73 Ha 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

$ G,G RLY 15 D 15 NAI-D 9G

(15.1) (15.1)

POLARIZED PHOTONS

TABLE n. Results.

dJ'/dSly da1/dSir

Target Arbitrary units nr n MDCM)

Cd 0.042 ±0.028 0.39 ±0.05 0.11 ±0.07 0.09 ±0.07 0.19 Sn 0.084 ±0.036 0.65±0.06 0.13 ± 0.06 0.11 ± 0.06 0.07 Ta

' 0.24 ±0.10 1.47 ±0.14 0.16 ±0.07 0.14 ±0.07 0.20 W 0.52 ±0.10 1.66 ±0.12 0.31 ±0.07 0.29 ±0.07 0.20 Pt 0.23 ±0.08 1.94 ±0.13 0.12 ±0.04 0.10±0.04 0.08 Au 0.39± 0.11 2.08 ±0.15 0.19 ± 0.06 0.17 ±0.06 0.07 Bi 0.10 ±0.15 2.65 ±0.26 0.04 ±0.06 0.02 ±0.06 0

FORM N3S-418

(R EV. 7-1 4*64) USCOMM-NBS-DO

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 192
A. Veyssiere, H. Beil, R. Bergere, P- Caxlos, A. Lepretre,

A. De Miniac

J. Phys. Lett. 36 , L267 (1975)

EL EM. SYM.

W 74

METHOD REF. NO. 75 Ve 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N * ABX 8- 22 D 8- 22 MOD—

I

4PI

G,2N ** ABX 13- 22 D 8- 22 MOD—

I

4PI

Abstract. — Partial photoneutron cross-sections [0(7, n) + <x(y, pn)], and o(y, 2d) of W, Re, Ir, Pt and Hg were measured by means of monochromatic photons of 8 MeV < E < 22 MeV so as to study the giant resonance. The experimentally observed evolution of the shape of the GDR, as one

proceeds from permanently deformed prolate nuclei (W and Re) towards oblate or even triaxia] gamma unstable nuclei (Pt), corresponds to the theoretical predictions of the dynamic collective model. ~

* 1020+ **1021

C£.n> CROSS-SECTIONS

Fra. 1. — Sections efficaces partielles ofy, n) + aiy, pn) des noyaux W, Re, Ir, Pt, Hg.

CROSS SECTIONS

Fio. 2. — Sections efficaces partielles aiy. 2a) des noyaux W,

Re, Ir, Pt, Hg.

FORM N3S-418

(R EV. 7.1 4*04) USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 193

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
500

400

300

200

100

0

100

0

100

0

100

0

100

0

6 8 10 12 14 IS 18 20 22 24

E, (MeV)

Pig. 3. — Sections efficaces totales <rT(E) des noyaux W. Re,

Ir, Pt, Hg.

{OTfiL CH0SS- SECTIONS

Tableau I

0\ ri Ex 02 r2 e2 mb MeV MeV mb MeV MeV

w 300 3,2 12,7 290 4,3 15,4

Re 310 3,3 12,8 330 4,45 15,4

Fio. 4. — Comparaison des sections efficaces totales experimentales

ffT{£) des noyaux W et Pt avec les predictions du modele collectif dynamique [12] positionnees de fa;on & faire coincider les Energies moyennes observies et calculdes de la RGD.

194
REF. V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

EL EM. SYM.

w 74

METHOP

76 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, F ABY THR-999 C 999 TRK-I 4pi

Table 1 Measured values of it, at £ = 1000 MeV and deduced values of <rt assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z

1/A *9 (mb) E0 (MeV)

<tk (mb)

Bi 3196 113 ±0.6 200 7.6 ±0.6 Pb 3145 5.4 ±0.4 220 3.6 ±0.3

T1 3110 4.1 ±01 230 2.8 ±0.3 Au 31.68 2.0±0.15 240 1.4 ±0.2

pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10~ 1 Re 30-21 (3.7 ±0.3) x 10- 1 280 (2.9 ±0.3) x 10* 1 W 29.78 (3.5 ±0.3) x 10" 1 290 (2.8 ±0.3) x 10- 1 Ta 29.45 (3.3 ±0.3) x 10' 1 300 (2.7 ±0.3) x 10- 1 Hf 29.04 ( 1.7 ±0.2) x 10-' 310 (1.4 ±0.2) x 10" 1 Yb 28.31 (1.3 ±0.1) x 10“ 1 330 (1.2±0.1)x 10“ 1 Tm 28.18 (7.5 ±0.8) x 10* 2 335 (6.8 ±0.8) x 10' 2 Ho 2711 (3.6 ±0.4) x 10* 2 355 (3.5 ±0.4) x 10- 2 Dy 26.80 (2.6 ±0.3) x 10“ 2 360 (2.5 ±0.3) x 10' 2 Tb 26.58 (2.5 ±0.3) x 10 -2 370 (2.5 ±0.3) x 10- 2 Gd 26.04 (1.6 ±0.2) x 10~ 2 380 ( 1.7 ±0.2) x 10' 2 Sm 25.56 (1.3±02)x 10 -2 390 (1.4±02)x 10" 2 Nd 24.96 (9.2 ±0.9) x 10- 2 405 (1 ±0.1)xl0' 2 Ce 24.00 (8 ±0.9) xlO* 2 420 (9 ±1 )xl0' 2 La 23.39 (8.4 ±0.9) x 10* 2 430 (1 ±0.1)xl0- 2 Sb 21.36 (1.2 ±0.2) x 10" 2 460 ( 1.5 ±0.3) x 10' 2 Te 21.19 (8.8 ± 1 )xl0- 2 465 (1.2 ±0.2) x 10' 2 Sn 21.06 (1.3 ±0.2) x 10- 2 465 (1.7 ±0.3) x 10' 2 Cd 20.49 (1.7 ±0.3) x 10~ 2 470 (2.2±0.4)x 10' 2 Ag 20.47 (2 ±0.3) x 10- 2 470 (2.6 ±0.4) x IO" 2 Zn 13.76 (2 ±0.4) x 10“ 1 515 (3 ±0.6) x 10" 1 Cu 13.44 (2.4 ±0.5) x 10“ 1 515 (3.6 ± 0.8) x 10~‘ Ni 13.35 (14 ±0.5) x 10' 1 510 (3.6 ±0.8) x 10" 1 Fe 12.10 (3 ±0.6) x IQ' 1 510 (4.4±0.9) x 10“ 1

12

20

A. V. Mitrofanova et al

.

Sov. J. Nucl. Phys. 6., 512 (1968) .

^T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971) . J.R. Nix et al . , Nucl. Phys.

81, 61 (1966)

.

N.A. Perifilov et al., JETP

(Sov. Phys.) 14, 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol. 2 (IAEA) Vienna,

1965, p . 283

.

Fig. 2. Nuclear fissilities as a function of Z'-IA. Experimental points: solid circles represent our data;

squares, the data from ref. 2

); open circles, the data from ref. 7

); and crosses, the data from (p,f) experi- ments20

). The straight line is the best fit calculated from our data for Z

J //1>26. The dashed curve is the curve VI calculated by Nix and Sassi 12

). form N3S-418

(R EV. 7-1 4-64) use OMM-N BS-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STAnOARDS PHOTONUCLEAR DATA SHEET 195
REF.

METHOD

V.G. Vlasenko, V.A. Gol'dshtein, A.V. Mitrofanova,

Yu.N. Ranuuk, V.I. Startsev, P.v. Sorokin, Yu.N.

Yad. Fiz. 23, 504 (1976)

Sov. J. Nucl. Phys. 23_, 265 (1976)

V . I . Noga

,

Telegin

ELEM. SYM. A Z

W

REF. NO.

74

76 VI 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,E/ ABX 100-500 D 1* 2 MAG-D DST

Inelastic electron scattering has been need to measure the total hadronic cross sections for absorption of *E IN GEV, 1 . 2 , 1 . 36

photons with energy 130-300 MeV by nuclei of C, Al. Ni, Mo, and W. The result obtained are compared

with calculations carried out in the impulse approximation.

FIG. 5. Total hadronic cross sections for absorption of photons by nuclei. FIG. 6. The ratio <rrA/Aayp as a

function of A for * = 0.32 GeV.

form N3S-418

(R EV. 7-1 A- 841 USC OMM-N BS-OC

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 196
* CF. A.V. Mitrofanova, V.I. Noga, A. I. Popov,

Yu.N. Telegin

Yad. Fiz. 25, 926 (1977)

Sov. J. Nucl . Phys. 25^, 493 (1977)

METHOD

Yu.N. Ranyuk and

EL EM. SYM. A Z

W

REF. NO.

74

77 Mi 11 hmg

REACTION result EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

1. G,SPL ABY THR-999 C 600-999 ACT1

4PI

2. E.SPL ABY THR-999 D 999 ACT1

4PI

The induced activity method has been used to measure the yields of IS photonuclear reactions in tantalum and tungsten nuclei in the photon energy range 600-1300 MeV. The cross sections have been calculated

in the approximation of a rectangular bremsstrahlung spectrum. Rudstarn's semiempineal formula has been

used to analyze the experimental data. For the reactions in tungsten the ratios of the yields produced by

photons and electrons have been measured.

1. 999=1.3 GEV DST NA24

2. 999=1.27 GEV

TABLE I.

M

Initial nucleus Emit tad nucleus Rruduai

nucleus

•t

600-

1300 MeV) mb

OQ. mb

<**p>

Q'

nb

theory]

OQ. mb

(Ref. 6) JO

t 4p. 9- 13a

3p. 10 15*

*fjYb "Lu

i

2d 3.U0.6 236 - 243*4.1

2

IW—tfl. lij^r

Zp. 5 0« "Ht 4.0 038 - 22*4

3 51l \p. 11-15* !iYb 2.0 i/j±a4 138 - 27±5

I tas-u». imiu

73 3p.S- 12*

Zp.9- 13*

‘^Lu "hi 1.98 • 2.2*0.4 • 3.9 - 23*4

S

- US— IM.

74 W 3*8-10*

2p, 711*

"Lu

"HI

4.0 53*1.1 4.6 - 27*5

6. UK !•!. 10,. 28 - 30*

10.4 5.0* 1.0 0.10 - *

7

l«3. IS*. lM«*f

7« W lp.0- \n 1.63 2d*03 - - 28*3

S

IA3. IS.. 2p. 0-3* "HI 0.03 3.12*0.02 - - 31*6

• “A* 3*9* "Yb 13 28*0.7 3d 7.07 -

2p. 10* "Lu

to Ip. 5A "HI 3d 33*1.1 0.7 8.9 -

11 '“fa 2p.«A tp."A

"Lu

"Hf

2.8 8d*td 244 63S -

12 *7*1* 3p. Ua

4p. 10*

‘"YD

T.f'u 20 2.9 *0.6 1.9 3.67 -

13 *S** 2p, 3a

I p, 9a "Lu

"HI ld2 • 2.4*03 • 3.67 -

14 'nTj 28* 9.8 8S*t.7 0.12 -

•In view of the absence of data on the absolute intensities of the >

lines in the spectrum of 171 Lu activity, in calculation of Oq the in- tensity of the peak Ey - 739 keV was taken as I007o.

ua too 'JM t:oo

FIG. 3. Anisotropy of the yield

of the fragment 2 *Na from W.

MeV

FIG. 4. Yield of the reaction W —z*Na as a function of bremsstrahlung maximum energy.

form N3S-418

(R (V. 7-1 4-«4l USC OMM-NBS-OC PHOTONUCLEAR DATA SHEET 197

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
V. Bellini, V. Emma, A.S. Figuera, S. Lo Nigro,

G.S. Pappalardo, G. Bologna

II Nuovo Cimento 47A, 529 ( i 978)

method

C. Mi lone. EL EM. SVM.

W

REF. NO.

74

78 Be 10 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F RLX 180-999 C 220-999 TRK-D 4PI

Zero cross section assumed below 180 MeV.

Summary. — The photofission yields of Re, W and Ta induced by a coherent bremsstrahlung beam from 1000 MeV electrons striking a diamond single crystal have been measured. The experiment has been performed at eighteen different energies of the main peak of the photon

spectrum, in the energy range between 220 MeV and 350 .MeV, by detecting

the fission fragments with glass sandwiches. The bohaviour of the photofission cross-section has been deduced from the experimental yields by

using an appropriate unfolding method. The obtained curves clearly

show a first resonance centred at a photon energy k ~ 350 MeV with a FWHM ~ 145 MeV, while there is a hint of a second resonance at k ~ 750 MeV. Information on the energy dependence of tho nuclear fis- sility from 100 MeV to 1000 MoV has been deduced from the comparison

of the estimated photofission cross-sectiou with the total photon interaction

cross-section. It has been found that the photomesonic model of the fis- sion process permits to explain the energy dependence of our photofission

cross-sections if a nuclear fissility increasing with photon energy is assumed.

COHERENT BREM,

Fig. 7. - See caption to fig. 6. Result for W(y, f).

Fjg 6 - Photofission cross-section estimated by our unfolding method. Results for Ke (y, f).

Fig. 4. - Seo caption to fig. 3. Results for W.

Fig. 3. - Photofission yields per equivalent quantum as a function of the first-peak energy k, of photons. The dots are the experimental data; the dashed curve represents the yield function recalculated from the f(k) data. Results for Re.

form H8S*418

(RCV. 7-14-64) USC OMM-N BS*QC

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS PHOTONUCLEAR DATA SHEET 198
Table II. - Estimated ft values and corresponding errors. All the data are <nvcn in arbitrary units. 3

k f(k) (arbitrary units) (MoV) Re W Ta

100 —0.31 ~ 0.S5 dGO i d -II — 0.49 ± 0.87 160 0.03 - 0.31 0.24 i 0.31 0.26 ± 0.33 220 1.95 ± 0.41 2.50 i 0.41 2.51 ± 0.41 2S0 6.26 ± 0.53 6.51 ± 0.53 6.63 0.55 340 8.90 ± 0.69 8.75 ± 0.69 8.56 ± 0.68 400 8.16 ± 0.72 8.38 ± 0.72 7.15 d; 0.70 460 6.10 ± 0.51 6.34 ± 0.51 5.43 ± 0.49 520 4.83 ± 0.47 5.04 ± 0.47 4.70 ± 0.48 580 4.70 ± 0.57 4.95 4; 0.57 4.72 ± 0.58 640 4.96 ± 0.59 o.20 i 0.59 4.98 ± 0.G0 700 5.41 ± 0.58 5.57 ± 0.58 5.29 ± 0.58 760 5.68 i 0.57 5.78 ^ 0.57 5.41 ± 0.57 820 O.Gd 4; 0.01 5.71 ± 0.61 5.32 ± 0.61 880 5.o 1 + 0.G7 5.53 ± 0.67 5.18 ± 0.67 940 5.38 ± 0.74 5.36 ± 0.74 4.98 ± 0.73 1000 5.23 ± 0.S0 5.13 ± 0.80 4.70 ± 0.77

Fig. 11. - Xuclear lissility P, as a function of the photon energy k. The curves are normalized at k= 1000 MeV. a) Bi, b) Pb, e) Au, d) Ta.

199

... - -• • - • •

A_i oo
02
Yu. I. Sorokin, V. A. Khrushchev, and B.A.

Yad. Fiz. 1J, 3 (1973)

Sov. J. Nucl. Phys. 17., 1 (1973)

METHOD

Yur ' ev

ELEM. SYM. A

w

REF. NO.

182 74

73 So 16 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 8- 28 G 0-28 BF3-I 4 PI

Figure gives a(sn) obtained by correcting a(xn)

for neutron multiplicity. Berman's statistical

factors for W-186 used.

TABLE 1. Giant-resonance characteristics of W ,,J and W13*

WIM

| w- W"

Eu MeV 12.1 ±0.1 I2.2±0.1 k = oiT, /<r; r, 0.2^M r 0.03 0.17-0.02

c,. mb NS±7 I45±7 0.

4 '3 r 0.07 0.45—0.07

r,. MeV 2.7 -0,1 2 ±0.1 \Q, = 0.4Zfl>e, b 7.2 - 0.9 6.8 *0.9

Ei, MeV

Ot, mb

r,. MeV

I4,8±0.l 337 ±3

3.5±0.l

I4.7±0.l 428±9

4.0 ±0.1

<?3 i’l b 6 57 6.21

TABLE 2. Integrated cross sections of W' 31 and W184

W'» WIM

e(V. Tn) From threshold to 27.4 MeV 3.68 From threshold to 20 MeV 2,75 3.46

<7t From threshold to 20 MeV 2.32 2.33 From 20 to 27.4 MeV 0,46 0.72 From threshold to 27.4 MeV 2.78 2.95

0.06 VZ / A 2.63 2.65 a(S2) 0.45 0.48

form H3S-418

(R EV. 7-1 4-04) USCOMM-OC 20010-P64 PH0T0NUCLEAR DATA SHEET 203

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF Yu. I. Sorokin and B. A. Yur'ev

Izv. Akad. Nauk SSSR. Ser. Fiz. 39^ 114 (1975)

Bull. Acad. Sci. (USSR) Phys. Ser. 39, 98 (1975)

EL EM. SYM.

W

A

182

z

74

METHOD REF. NO. 75 So 12 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, XN ABI 8- 27 C 8- 27 BF3-I 4PI

SEE 73S016

Table 1

Ele- ment A

®0« (T. Tn) MeV b MeV -b mb

«-2. mb X XMeV-l

^m* MeV

K, MeV

MA-li

MeV-1

Thres- hold

(7.2n), MeV

®0(E1 M«V X

X b

to 27 MeV to 20 MeV

20-27 MeV

112 2.2.1 1. K0 1.49 0.41 1 12 6.7 15.8 : 0 ! 10.2 19.2 1.60

114 2.26 1 .66 1,39 0.47 ICS 6.5 15.7 1 .5 10.2 18.1 1 .68 116 2.40 1 .85 1 ,40 0,4 S 110 6.6 15.6 . 1 .7 8.1 17,1 1.71 117 2.52 1 .86 1,39 0,47 no 6.7 15.4 : i .6 7.3 16.5 1.72 Sn 118 2,46 I .92 I .5.3 0.39 IIS 7.1 15.5 '.0.7 •=.6 16.3 1.71 119 2.6.1 1 .86 1.42 0,44 hi 6.8 15.4 12 .

U

1.1.

2

15,8 1,74

120 2.69 2.07 1 ,69 0.38 127 7.9 15.3 19.1 3.6 15,6 1.75

122 2.94 2,03 1.51 0,52 119 7.1 15.6 21 .8 4 .5 15,0 1.77

124 2.90 1 .93 1.44 0.49 114 6.9 15.5 23,2 5.4 14,4 1.79 w ! 182 3.68 2.78 2,32 0,46 184 12.5 _ 24.2 5.2 14.9 2,63 " 1 184 4.63 2.95 2.33 0.72 196 13.0 — 23.7 5.2 13.6 2. 65 Au 197 4.06 3.15 2.81 0,34 226 16.5 13.3 20.9 17.1 14.8 2.84 206 3.93 3.21 2.80 0,41 225 16.1 13,5 23.1 6.S 14.8 2,96 ph

, 208 4.32 3.28 2.81 0.47 HI 16.7 13.3 22,8 9.6 14.1 2,93

Bi 209 4.59 3.47 2,96 0,51 246 17.9 13.2 21.1 10.2 4.3 3.00

FORM N3S-418

(R EV. 7-1 4® 64) USC OMM-N BS-DC PHOTONUCLEAR DATA SHEET 204

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
" er 6. M. Gurevich, L. E. Lazareva, V. M. Mazur, and

G. B. Solodukhov

JETP Lett. 23, 370 (1976)

Pis'ma Zh. EFsp. Teor. Fiz. 23^ 411 (1976)

EL EM. SYM.

W

A

182

z

74

METHOD REF. NO. 76 Gu 5 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

G,MU-T ABX 8- 21 C 35 NAI-D 4PI

We measured the total cross section for the absorption of rays in the region of El

resonance for the nuclei l45 Ho, l7, Hf, l,0Hf, '“Ta, "J W, ,,7Au. and “’BL The

singularity in the behavior of the resonance widths, observed in the region

160< A< 185, is apparently due to the influence of the neutron subshell N = 108.

FIG. 2. Widths T of El giant resonance in the region of nuclei with A > 150

according to the data of Saclay (•), Livermore (A), and the Institute of Nuclear

Research of the USSR Academy of Sciences (O). The crosses mark the deformation parameters 0.

FIG. 1. Total photoabsorption cross sections for the nuclei

1S5 Ho, lT8 Hf, 180Hf, 18l Ta, 182 W

19TAu, 203 Bi. USCOMM-NBS-OC

over PHOTONUCLEAR DATA SHEET 205

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
I

FIG. 3. Width of Lorentz lines approximating the photoabsorption cross sections, for deformed nuclei in the region 150 < A < 185.

Nucleus mb

r,MeV

*1

MeV

»2mb

r2 MeV

*2

MeV

a2 r2

<Ti ri Qob P

Ho-165 235 2.0 12.2 272 4.0 15.5 2.3 6. 8 ±0.8 0.29

Hf-178 291 3.1 12.2 334 4.9 15.5 1.8 7. 5±0.

8

0.28

Hf-180 286 3.2 12.2 324 5.1 15.3 1.8 7. 2 ±0.8 0. 27

Ta-181 272 3.0 12.1 316 5.1 15.0 2.0 6. 8 ±0.8 0. 26

W-182 267 3.2 11.9 303 5.6 14.8 2.0 7. 2 ±0.8 0. 26

Au-197 535 5.2 13.7 • • • • • • • • • • • • • • • • • •

Bi-209 600 4.6 13.8 • • • • • • • • • • • • • • • • • •

206
W. Gunther, R. Haag, K. Huber, U. Kneissl, H. Krieger, H.J. Maier,

H. Stroher

Phys. Rev. Lett. 44, 716 (1980)

REF.

METHOD

ELEM. SYM.

w

REF. NO.

182 74

80 Gu 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E,F N0X THR-55 D 35-55 TRK-D 4PI

Low end of experimental arrows in Fig. 1 indicated lower limit for fission barriers

established by this experiment.

The electroinduced fission of 1E - ,t4 - ,KW has been investigated in the energy range from

35 to 55 MeV. The fission barriers, estimated by a statistical-model analysis of the measured cross sections, are compared with theoretical predictions and are only consistent with the assumption of a constant pairing strength.

FIG. 1. Calculated fission barriers (Ref. 3) (full lines, C = const; dashed lines. C~S) and limits deduced from

lr experiments on 18o W.

uuv.cu uum

PORM N8S-418

(REV. 7-14-64) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 207

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF- G.M. Gurevich, L.E. Lazareva, V.M.

G„ V. Solodukhov, V.A. Tyutin

Nucl . Phys. A351 , 257 (1981)

METHOD

REACTION EXCITATION ENERGY

G,MU-T THR-20

Mazur, S.Yu. Merkulov, EL EM. SYM

182 74

81 Gu 2 hg

TYPE RANGE 27

OETECTOR

NAI-D

angle

TPT

Abstract: The cun es of the total eamma-absorption cross sections (ft „„) in the El aiant resonance energy

range for the nuclei 1 ' 4 Sm.'' "Gd. '"Ho. '" 8 Er. ‘**Yb. ,78 Hf. 180 Hf. l8, Ta. ,82 W, 184W. 18<> W

and

|l,7 Au have been measured using the absorption method. Parameters of the Lorentz curves

littmg the measured cross sections n tol are given. Quudrupole moments (£)0 ) and nuclear deformation

parameters I/O were obtained. For deformed nuclei in the - 1 55 < .-1 < - ISO region a violation of the correlation between

giant resonance widths (ft and nuclear deformation parameters was found, f, and T ,, the widths

of the resonances corresponding to v ibrations of nucleons along and across the nuclear deformation

axis, were observed to decrease with the increase of which could be accounted for by the presence

of an .V = 108 subshell.

Fag. 2 Total nuclear -absorpt

J ’"(id. ""Ho. "’"Er. 1 4 Yb 1 FOR

ir e> USC0MM-N8S-0C

mn cross sections (ir,

lH ) measured by the absorption method for

1 ,4 Sm.

***• '"'Ta. ‘"'W, l 84 W. ' ""W and Au Rms error bars are “

shown.rnuiunucLCAiv l/mim jhu. 208

(OVER)

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOAROS
Table 2

Parameters of Lorentz curses fitting the experimental data on <r IOI

Nucleus

( MeV)

ff

i (mbi

r, (MeV)

E, (MeV)

<x 2 (mb)

r, (MeV)

<r

; r, aj,

r

(MeV)

,54Sm 12.2 188 3.4 15.7 207 5.7 1.85 8.1

1 !o Gd 12.3 206 3.2 15.7 220 5.’5 1.81 7.7

,<,s Ho 12.3 202 2.3 15.2 239 4.8 2.47 7.0

l6 *Er 11.9 3.2 15.5 275 4.5 1.73 7.4

,,4Yb 12.3 297 2.9 15.5 320 4.9 1.80 7.1 '"Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2

1 8n Hf 12.2 286 3.2 15.3 324 5.1 1.81 7.1

l81 Ta 12.1 272 3.0 15.0 316 5.1 1.97 6 8

IS: W 11.9 267 3.2 14 8 303 5.6 2.01 6.8

,sa w 11.9 315 2.9 14.8 321 4.7 1.65 6.8

1 12.0 246 3.3 14.5 332 5.1 2.07 6.4

' ,7 Au 13.7 535 5.2

Average

error 1.4% 11.2% 9.3% 1.5% 9.7% 46% 0.22

0.2 MeV

T A III 1 3

Ratios ol nuclear ellipsoid axes <( ). deformation parameters ( /<) and intrinsic quadrupolc moments ((%]1. calculated from

Nucleus ''Sm '"(id ""Ho '""Er 1 * 4 Vb ' "*1 If '""Ilf ,H, Tu '" ; \V IM4 W ‘""W

k 1 '20 1 '02 1 259 ’ 1.327 1 289 1.296 1 281 1.263 1.271 1.268 1 229 0 326 0.309 0 266 0.334 0.296 0.303 0 288 0.270 0 278 0 274 0 2'8

1

{ *0017 *0016 *0 056 +0.032 + 0 024 + o 032 + 0 036 + 0.026 ±0.050 ±0 032 •±0 013

6 3 6 2 5 S 7.5 7.0 7.5 7.2 6 9 7.2 7 1 h 2 U.i Alt 3 t 0 3 * 0 8 +07 + 0 6 + 0.8 + 0 9 ±0 7 ±0 8 + IIX t 0

Taiii i 4

Integral characteristics of El giant resonance

Nucleus *0 c»p *.»i. ff

i ff M.

_ j * 3 a 11.^ <T , ff

- 21. ff :i -4

5 J

I MeV hi 0 06.V/5 4 ( MeV b) 0.06 \/ ^ (mb) (mb) (mb) (mb MeV ') (mb MeV

1 (;/b MeV 1 )

1 ‘‘Sm 1 94 r 0 06 0 87 2.86 1.29 1 17± 3.5 156 0.189 9.1 ±0.3 14.3 3 23 "(id 2.07 + 0.07 0.91 2.95 1.30 143 ±4.6 163 0.194 1 0.5 ± 0.4 14.9 3.30 ""Hi' 186 - 0 06 0

7

8 2.53 1.06 155 + 4.4 160 0.177 10 1 ±0.3 12.6 2.54 ""1 r 2 24-0 06 0 92 3.07 1.26 161 ±4.3 197 0 212 1 2.0 ± 0.3 160 3 13

1 '‘Yh 2 69 ±0 05 1.07 3.82 1.52 195 ±3.4 240 0.247 14.5 ±0.3 192 3.54 ‘"'Hf 2 85*0 07 111 3.99 1.55 208 ±4.9 247 0.247 1 5.3 ± 0.4 20.2 3.59

III 2 '2 -0.06 1.05 4 03 1.56 200±4 4 250 0.246 15.1 ±0.3 20.7 3.61 ''Ta 2 84 - lit) 7 1.09 3.81 1.46 2 1 0 ± 5.

3

245 0.239 1 6.0 ± 0 4 20.0 3 45

'•-\v 2.86 + U.07 1.09 401 1.52 211 ±5.3 256 0.248 1 6.2 ± 0.4 21.6 3.70 ‘-U 2. 78 + 0 07 1.05 3.80 1.43 207 ±5.3 251 0.240 15.9 ±0.4 20.9 3.51 2.90-0 07 1.08 3.95 1.48 2 1 4 ± 5.3 256 0.241 16. 2 ±0.4 21.6 3 56 \u 3 12 — 0 06 1 10 4.37 1.54 229 ±4.2 276 0.241 1 8 6 ± 0 4 23.3 3.49

209
-
•183

w

A= 1 83

El EM. . M. A

.v , ... wc J. Halpern* ar.c E. G. Muirhead

?nys. Rev. 118 , 1302-12 (i960) W 183 7^

.“THOD

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N N(2fX THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary and comparison of neutron sqxiration energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the centcr-of-moss system in Mev. Kmc1 ion No. runs Present results Other results Method Reference

W,0

( 7 ,n)W1 “ 1 6.29 ±0.05 6.29 ±0.06 mass data q

« W. H. Johnson, Jr, and V. B. Bhanoc Phy». Rev. 107. 6 (!9S7).

NBS-41S U.S. DEPARTMENT OF COMMERCE

NATIONAL BUWIAOG-, J r *sDABrs

PHOTONUCLEAR DATA SHEET 213
REF. N. Shikazono, H. Takekoshi and T. Shoji

J. Phys. Soc. Japan 21, 829 (1966)

ELEM. SYM.

W 183 74

METHOD

Mtfssbauer Effect

REF. NO.

66 Sh 2 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G «

G

LFT 1 D 1 NAI-D 1 4PI

-

r^(46.48 kev) = (2.4 ± .1) x lo" 7 eV

E2/M1 = 0 . 5%

form NBS-418

(REV. 7-14-04) USC OMM-OC 20010-P64 PHOTONUCLEAR DATA SHEET 214

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
w

A=184

w

A=184

Ref. J.H. Carver, D.C. Peaslee, R.B. Taylor

Phys. Rev. 127, 2198 ( 1962 )

Method 33 MeV electron synchrotron; activation; Be - window Nal

hlem. Sym.

w 184

Ref. No. 62 Ca 2

74

JHH

Reaction

(7,P)

E or AE

Bremss.

32

22.5

S

adE

65 1 MeV-mb

0

J *

-L

Notes

Absolute yields by comparison with

Ta

l 8 l (y,n), Cu63

(Y,n)Cu62

and

results of Berman and Brown [Phys.

Rev. £6, 83 (1954)].

a

UJ>

|

1 ; 1—1 1 iu n —i—'

1—i

i*f», . v 1 L w«p> T* _/\ s

-

l \ - J

1 1 i ^ \ 1 1 1

IS* :n A to too Wftp) Ta \

H,«p)Au

;r /V ? y

^ « I l/.-V'T 1 1

1 1 1 1 10 15 20 25 30 5 10 15 20 25 30 55 GAMMA- RAY ENERGY (M«V)

Fig. 7 . Excitation functions and derived cross sections for

th<* photodisintegration of tungsten and mercury.

form NBS-418

(0-1-03) U3COMM-OC 18686-P03

U.S. DEPARTMENT OF COMMERC:

NATIONAL BUREAU OF STANCE'

PHOTONUCLEAR DATA SHEET 217
A„ M. Goryachev, G.N. Zalesnyi , S.F. Semenko, and B. A. Tulupov

Yad. FI*. 17, 463 (1973)

Sov. J. Nncl. Phys. JL7, 236 (1973)

REF.

METHOO

EL EM. SYM. A z

W 184 74

REF. NO. 73 Go 6 hmg

reaction RESULT

EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 8- 20 C 8- 20 BF3-I 4PI

FIG. 2. Cross sections for W184- 184

, Os1 *0, and Re18J> 187 . The cross

section a

y n + 2o

y 2n >s denoted by vertical lines whose lengths are twice

the rms errors. The crosses represent the cross sections, corrected for

multiplicity, above the threshold of the (7, 2n) reaction. The solid curves

are Lorentz curve approximations. For W1 *4’ 1 ** and Os190 the calculated dipole transition strengths are shown. form N3S-41*

'REV. 7.1 4, «4) USCOMM.OC 2S010.P44

TABLE III w* o*'» R#** V-I»|

r„ MeV 2.33 2.55 2.13 2.51 2-83 2.2®

£,, MeV 12.3 12.5 12.6 12.7 12.6 12.52

at, mb 241 225 223 262 250 21 i IVMeV S.l 5.4 5.7 5.2 5-3 5.18

Ei, MeV 15.6 15.2 14.8 15.4 IS 6 14.88

Of, mb 333 317 318 315 296 334

0.06 NZM. MeV-mb 2.65 2.67 2.74 2.68 2.69 2,67

S, S„ MeV - mb ; Si/ S, 4.0 3 9 3.9 3.6 3.8 3.47

2.3 3.0 3.8 2.5 2.2 3,6

Note. Sj = (jr/2)ojrj is the Lorentz area.

U.S. DEPARTMENT OF COMMtRCi NATIONAL BUREAU OF ST ANOAHOS PHOTONUCLEAR DATA SHEET 218
REF. C.L C.M. JTM. Yu. I. Sorokin, V.A. Khrushchev, and B. A. Yad. Fiz. 17, 3 (1973)

Sov. J. Nucl. Phys. 17, 1 (1973)

METHOO

Yur ' ev W 184 74

REF. NO.

7 3 So 16 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G , XN ABX 8- 28 C 0-28 BF3-I 4PI

Figure gives <r(sn) obtained by

TABLE 1. Giaat-resonance characteristics of W'» and W'“ correcting ff(xn) for neutron multiW»« - 1

1 W'« plicity. Berman's statistical

factors for W-186 used.

£„M.V

Oi. mb

r,,M«v MeV

ffi. mb

rh M.v

12,1 ±0.1 145*7

2, 7 ±0,1

I4.8±0.l 387 ±8

15±0.l

12.2*0.1 145*7

2*0.1

I4.7i0.l 428*9

4.0±0.l |

Ra » (JiTi / GiFf

eQo — 0,4Z/?*t, b Cm b

0.238 * 0.03 0.478 ±0.07

7.2 *0.9

6.57

0.17*0.02

0.45*0,07 6.8±0.9

6.21

TABLE 2 . Integrated cross sections of W152 and Wld4

w- Wa(v. T.-.) From threshold to 27.4 MeV 3.63 4.83 From threshold to 20 MeV 175 3.46

<7/ From threshold to 20 MeV 2.32 2.33 From 20 to 27.4 MeV 0.46 0.72 From thieitiold to 27.4 MeV 2.73 2.95 0,05 .Y7./ A 2.63 2.65 0.46 0.43

form N3S-418

(REV. 7-14-04) USCOMM-OC 20010-P64 PHOTONUCLEAR DATA SHEET 219

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
Yu. I. Sorokin and B. A. Yur'ev

Izv. Akad. Nauk SSSR. Ser. Fiz. 39^ 114 (1975)

Bull. Acad. Sci. (USSR) Phys. Ser. 39_, 98 (1975)

ELEM. SYM.

W 184 74

METHOD REF. NO. 75 So 12 hmg

REACTION RESULT excitation ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABI 7- 27 C 7- 27 BF3-I 4PI

-

SEE 73S016

Table 1

Ele- ment A

1 <*()•(*• T°) MeV • b °0

y

MeV-b a-V

mb

*-2. mb X XMeV-1

^m» MeV

K. MeV

.< 1.4 -h

MeV*!

1 Thres-

| hold

( 7 . 2 n)

| MeV

o0

(El MeV X

x b

to 27 MeV to 20 MeV

20-27 MeV

ii} 2.29 1 .‘0 1.49 0,41 112 6,7 15,8 0 ! io.-: 19.2 1 .60

114 2.26 1 .86 1.39 0.47 its 6.5 15.7 1 .5 10.2 18 I 1 .£8

1 IS 2.40 1 .85 1 .40 0,45 110 6.6 15.6 . 1.7 a. i 17 1 1 71 117 2.52 1 ,86 1.39 0,47 no 6.7 15.4 -

1

.6 7.3 165 1 72 Sn 118 2,46 1 .92 1.53 0.39 1 15 7.1 15.5 '. 0.7 ‘ 6 16 3 1 71 119 2.69 1 .86 1.42 0,44 111 6.8 15.4 22.0 13.2 15 a 1 74

120 2,69 2.07 1,69 0.38 127 7.9 15,5 19,1 <.6 122 2.94 2.01 1,51 0,52 119 7.1 15.6 21 .8 I 77

124 2.90 1 ,93 1,44 0,49 114 6,9 15.5 21.2 5 . 4 14,4 1.79

\v •' 182 3,68 2.78 2,32 0,46 184 12,5 24.2 5.2 14.9 2,63 " i 184 4.88 2,95 2,33 0,72 196 13,0 — 23.7 5.2 13.6 2.65 Au 197 4.06 3.15 2,81 0.34 226 IS .

5

13.3 20.9 17.1 11.8 2.84 ph

206 3,93 3.21 2.80 0,41 225 16.1 13,5 21.1 6.5 14.8 2.96

208 4.32 3.28 2 , 81 . 0,47 231 16.7 13.3 22.6 9.6 K.l 2.98

Di 209 4.59 3.47 2.96 0,51 216 17.9 13.2 21.1 10.2 1 4 .3 3,00

fobm N3S-418

<R EV. 7 - I 4-64) USC OMM-NBS-DC PHOTONUCLEaR DATA sheet 220

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

JETP Lett. 28, 168 (1978)

Pis'ma Zh. Eksp. Teor. Fiz. 28, 168 (1978)

EL EM. SYM. A

W 184 74

METHOD REF. NO.

78 Gu 7 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,MU-T ABX THR-37 C UKN NAI-D 4PI

The absorption method is used to measure the total photoabsorption cross

section curves for deformed l54Sm, 156Gd, l68 Er,

IMYb, i84 W, and l86W

nuclei in the region of the £1 giant resonance. The behavior of the resonance widths for nuclei in the interval A = 153 to 186 is discussed. PACS numbers: 24.30.Cz, 25.20. + y, 27.70. +q

TABLE 1.

Nucleus MeV mb

ri MeV MeV

a

2 mb

r2 MeV

r

MeV

Q0 b P

ZN

a

° L

. /0.06 —A

1S4Sm 12.2 188 3.4 15.7 207 5.7 8.1 ±0.2 6.3 ±0.3 0.32 ±0.02 1.28

l56 Gd 12.3 206 3.2 15.7 220 5.5 7.7 ±0.2 6.2 ±0.3 0.31 ±0.02 1.30

168 Er 11.9 222 3.2 15.5 275 4.5 7.4 ± 0.2 7.5 ±0.7 0.32 ±0.03 1.26

17 4 Yb 12.3 297 2.9 15.5 320 4.9 7.1 ±0.2 7.0 ±0.6 0.30 ±0.02 1.52

i ® 4 W 11.9 315 2.9 14.8 321 4.7 6.8 ±0.2 7.2 ± 0.8 0.27 ±0.03 1.50

186 yj 12.0 246 3.3 14.5 332 5.1 6.4 ±0.2 6.2 ±0.8 0.23 ±0.03 1.48

Average

error ±1.3% ±10.5% ±7.5% ±1.3% ±9.4% ±3.8% — — — —

form N8S-41I

(R CV. 7*1 4» 641 USCOMM-NBS-OC

(five, r)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 221
FIG. 3. Experimental values of JT = E — (£, — E,) in the region of deformed nuclei with A = 153-186: O—present work and'": •—Saclay group: —Livermore group. Owing to a small systematic deviations of

the absolute values, the ordinate scales for the Saclay and Livermore data are shifted 0.15 MeV upward and downward, respectively.. The (T, + T; ) curve was obtained from the Jf curve after introduction of corrections in the interval A = 175-186.

222
„ er W. Gunther, R. Haag, K. Huber, U. Kneissl, H. Krieger, H.J. Maier, £LEM $yM H. Stroher

Phys. Rev. Lett. 44, 716 (1980)

W 184 74

METHOD REF. NO.

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE Type range type range

et f ARX THR-55 D 35-55 TRK-D 4PT

Low end of experimental arrows in Fig. 1 indicated lower limit for fission barriers

established by this experiment.

The electrolnduced fission of ,E * ,84 . 18fi \y has been investigated in the energy range from

35 to 55 MeV. The fission barriers, estimated by a statistical-model analysis of the measured cross sections, are compared with theoretical predictions and are only consistent with the assumption of a constant pairing strength.

FIG. 1. Calculated fission barriers (Ref. 3) (full lines, C=const; dashed lines, G ~ S) and limits deduced from

our experiments on 13:> 134 • 18li W.

FIG. 2. Measured cross sections for 1MW and statistical-model calculations for different barrier heights (B = 18-24 MeV); full and hatched rectangles, experimental points for different targets; open rectangles, cross sec

tion for U normalized to the 25-MeV point. USC OMM-N 05-01. * epartmentof commerce

A L BUREAU OF STANDARDS
ref G.M. Gurevich, L.E. Lazareva,

G.V. Solodukhov, V.A. Tyutin

Nucl. Phys. A351 , 257 (1981)

V.M. Mazur, S.Yu. Merkulov, ELEM. SYM.

184 74

REF. NO.

81 Gu 2 hg

EXCITATION SOURCE OETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE angle

g,mu-t ABX THR-20 C 27 NAI-D ‘ 4FT

Abstract: The curses of the total stamma-absorption cross sections in the El aiant resonance energy

ranee for the nuclei ‘"'Ho. lB8 Er. ‘"‘Yb. ,7, Hf. ,80 Hf. ,Hl fa. ,82 W. l8 -*W, ""’W

and l '*’Au have been -measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections ir lm are given. Quadrupole moments ((?0 ) and nuclear deformation

parameters (/() were obtained. For deformed nuclei in the - 155 < A < ^ ISO region a violation of the correlation between

giant resonance w idths 1 1 ) and nuclear deformation parameters was found. T, and f\. the widths

of the resonances corresponding to v ibrations of nucleons along and across the nuclear deformation

axis, were observed to decrease with the increase of .-I which could be accounted for by the presence

of an .V = I OX subshell.

- Total nuclear ‘.'-absorption cross sections (<r,

fl) ) measured bv the absorption method for

1 "Gd. '"'Ho. ‘""Er. ''•‘Yb. 1 ''III. '""Hf. '"'Ta. I8: W. '" i W. ‘""W and ‘“'Au. Rms error bars are FOF

(R EV. 7-1 4-«4l USCOMM-NB5-OC

shown.PHOTONUCLEAR DATA SHEET 224

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 2 Parameters of Lorentz curves fitting the experimental data on <r,01

Nucleus ff

i r, £, <T, r. ff.r. r

(MeV) (mb) (MeV) (MeV) (mb) (MeV) <T

t r

,

(MeV)

1S4Sm 12.2 188 3.4 15.7 207 5.7 1.85 8.1 ,50 Gd 12.3 206 3.2 15.7 220 5.5 1.81 7.7 "'Ho 12.3 202 2.3 15.2 239 4.8 2.47 7 0

,4, Er 11.9 3.2 15.5 275 4.5 1.73 7.4

1 4 Yb

’’®Hf

12.3 12.2

297

291

2.9

3.1

15.5 15.5

320

334 49

4.9

1.80 ISO7.1 7.2 l8° H f 12.2 286 3.2 15.3 324 5.1 1.81 7.1 "‘Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8

1

8

-

W

11.9 267 3.2 14.8 303 5.6 2.01 6.8 "JW 11.9 315 2.9 14 8 321 4.7 1.65 6.8

1 12.0 246 3.3 14 5 332 5.1 2.07 6.4

,,,7 Au 13.7 535 5.2

Average

error 1.4°. 11.2 °„ 9.3 1-5% 9.7 % «-6\ 0.22 0.2 MeV

T A III i 3

R.iiu'v of nih.le.ir ellipsoid axes (X ). deformation parameters ( /() and intrinsic quadrupole moments ((?„). calculated from K,

Nucleus ,,1Sm “"Gd ""Ho "'"hr

‘* 4 Yh '"hi '""Ilf '"'Ta '" 2 W '" 4 W i

w

X 1 32U 1 302 1 259 1.327 1.289 1.296 1.281 1.263 1.271 1.268 1 229

K 0 326 0 309 0 266 0.334 0.296 0. 303 0.288 0.270 0.278 0.274 0 2 '3 + 0 til 7 ±0 016 + 0 036 ±0032 ±0 024 ±0 032 ±0 036 ±0.026 ±0.030 ±0 (M2 ±0 033

() 6 3 6 2 5.S 7.5 7.0 7.5 7.2 6.9 7.2 7 1 6 2 Vn * 0 3 til 3 1:0.8 ±0.7 ±0 6 + 0 8 ±0.9 ±0.7 ±0 8 + 0.8 t 0 9

Tahi v 4

Integral characteristics of F.l gi;ini resonance

" tip ^Ol « i ° IL

_ j * 3 a II.-** a "iv. <7 •,-«

' (MeV hi 0 06.Y/ .-

1

(MeV b) 006 V/ •) (mb) (mb) (mb) (mb MeV ') (mb MeV “

'

)

(/<b MeV 1 )

1 ‘ 4Sm 1.94 ±0.06 0.87 2.86 1.29 1 1 7 ± 3.5 156 0.189 9.1 ±0 3 14.3 3.23

' " Gd 2.07 + 0.07 0.91 2.95 1.30 143 ±4.6 163 0.194 10.5 ± 0.4 14.9 3.30 "“Ho 1 86 ±006 0.78 2.53 1 06 155 ±4.4 160 0.177 10.1 ±0.3 12.6 2.54 "**Er 2.24+0 06 0.92 3.07 1.26 161 ±4.3 197 0.212 12.0 ±0.3 16 0 3.13

’ h . 2 69 ±0 05 1.07 3.82 1.52 195 ±3.4 240 0.247 1 4. 5 ± 0.3 19.2 3.54 ‘'•HI 2 85 + 0 07 I.l 1 3.99 1.55 208 ±4 9 247 0.247 1 5.3 ±0.4 20 2 3 59 '"III 2 '2 r 0 06 1.05 4.03 1.56 200 ±4.4 250 0.246 15.1 ±0.3 20 7 3.61 .

1 “ T.i 2.84-0 o' 1.09 3.81 1.46 210+5.3 245 0 239 1 6.0 ± 0.4 20.0 3 45 "w 2 86 + 0 07 1.09 4.01 1.52 211 ±5.3 256 0.248 16.2 ±0.4 21.6 3.70

‘• 4 \\ 2 '8±0 07 1.05 3.80 1.43 207 + 5.3 251 0.240 15.9 + 0.4 20 9 3.51 '•"W 2 90 + 0.07 1 08 3.95 1.48 2 1 4 ± 5.3 256 0.241 16.2 ±0.4 21.6 3.56

'- Au 3 12 ±0 06 1.10 4.37 1.54 229±4 2 276 0.241 1 8.6 ± 0 4 23.3 3.49

225
ref. M. Schumacher, F. Smend, W. Miickenheim, P. Rullhusen,

A. Phys. A300 , 193 (1981)

METHOO

H.G. Borner EL EM. SYM.

184 74

egf

REF. NO. 81 Sc 6

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,G ABX 2-7 2-7 SCD-D 90

Elastic scattering by nuclei in the range of mass numbers between 64 and 238 has been

studied with monochromatic photons in the energy range between 2 and 8 MeV. These

photons were provided either by a Ti(n,y) source installed in the tangential through

channel of the Grenoble high flux reactor, or by 24, Na and 56 Co sources produced by

deuteron bombardment of A1 or Fe at the Gottingen cyclotron. The photoexcitation of

23 nuclear levels has been observed and the decay properties and groundstate widths of

the majority of these levels have been determined. For the lead scattering target the co- herent elastic differential cross section has been studied in detail. There is evidence that below the photo-neutron threshold the elastic scattering via virtual photoexcitation of

the nucleus can be approximated by extrapolating the real part of the Giant Dipole Resonance amplitude along a Lorentzian curve. Coulomb corrections to Delbriick scat- tering seem to play a small role at 6.5 MeV.

2.60-6.76 MEV

Table * Properues of levels observed by photoexc.tation. I da.dOf'": experimental d.Uerent.al cross sect.on per ident.ned isotope or element for resonance scattering through 0 = 90° /*: spin-parity of excited level; W{0): angular correlation function; g = (2/„ + l)/(2/

f + 1); f0

; radiative groundstate transition width. T: total level width. Errors in the

last digits are given in parentheses

Isotope (MeV)

(da;d(2f*f

(pb/sr) r r0;r me) g r0

- (meV) r r0

< (meV)

*0r*

(meV)

238 U 2.754 13 (4) m 0.77 0.145 0.084 238 u 3.254 421 (5) i- 0.24 0.83 1.5 0.52(15)“ 20,

Bi 6.555 2.1 (4) 10 2 - - 0.74 0.74°

• 0,*Bi 7.168 1.7 (3) 10 5 9/2** 1.00 710 786 820 (40)* 203j] 6.418 8.75(30) I0 J 1/2* 0.28 30 102 82 (15)* TI 6.759 7 (3) - - _ Hg 6.555 68 (17) - - _

1 86 W 6.418 5.2 (3)- 10 2 1-* 0.32 1.75 2.4 I84 W

184 W

6.555 6.759

9.8 46

(10). (10)10 2 (1)

(1)

0.52

0.58

3.44 0.17

2.9 0.13

-

181 Ta 3.010 174 (17) - 0.72 0.42 0.59 18l Ta

181 Ta

6.418 6.759

62

4.8

(4) (12)

” 0.73 0.2 0.018

0.27° 0.018°

-

'"’Ho 6.418 10.3 (30) - - 0.035 0.035° '° 5 Ho 6.759 5.6 (14) - - 0.021 0.021° Nd 2.754 2.6 (5) - - _ Nd 3.254 14.0 (10) - - _ Ce 6.759 13.4 (10) - _

l21 Sb 3.452 2.20' (5)- I0 J - 0.60 2.9 49° l0 °Mo 6.418 1.53 (4)- 10* 1-*

,4 0.88 52 26 25 (8)* Mo 6.555 4.4 (4)- I0 J (1) 0.33 15 21 Mo 6.759 6.2 (15) - _ Mo 7.168 8.2 (26)- 10 2 - - - -

° [11] b W(0)gro/T =1 assumed ' lV(6>)g=, assumed

d [28] (a small correction has been applied to the data of [28]) Upper limits in case not all the transitions to lower levels were observed

Present work * Previous work

form N»$-.41*

IR EV. 7.1 4-441 USCOMM.OC 2S010.PS4

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANOARDS PHOTONUCLEAR DATA SHEET 226
Table 1. Differential cross sections for elastic scattering (daidQ)nv of photons from 56Co and 2 *Na sources by different scattering targets.

in units of pb/sr. Errors in the last digits are given in parentheses. 9

deg

Scattering

targets

2.599* (MeV)

2.754" (MeV)

3.010* (MeV)

3.202* (MeV)3.254* (MeV)

3.273* (MeV)

3.452* (MeV)

90 238U 52.7(25) 57.5(25)* 56(16) 47(4) 456 (10)* 34(6) 49(14)

209 Bi 33.1(30) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33(15)

"•'Pb 31.5(23) 31.0(1.6) 35 (8) 27(3) 26.6(22) 25(4) 23 (8)

“*‘T1 31.5(33) - 27(12) 32(5) 24 (3) 22(7) 34(15) "'Hg 30.0(27) - 24(10) 28(5) 25.5(18) 26(8) 20 (8) “*'W 22.5(11) - 17 (7) 19(3) 18.4(15) 18(5) 21 (6)

* s ‘Ta 20.0(15) 19.2 (6) 193(20)* 20(4) 17.3(21) 18(5) 21 (8) 165 Ho 15.9(13) - 17(10) 13(6) 15.6(20) 18(8) -

M, Nd 11-4 (7) 14.2 (5)“ 15 (7) 14(3) 24.2(1 2)

d 13(3) 9 (6) "*'Ce 11.1 (9) 11-0 (5) - 11(3) 9-5(13) 8(4) -

1Z7J 8.4(10) 86 (5) - 9(2) 7 (1) 5(3) - "‘Sb 8.0(11) - - 10(4) 6.8(19) - 1,270(50)* "'Sn 6.5 (7) 7.0 (5) - 5(2) 7.6 (8) 6(3) - “*Cd 6.2 (5) - - 6(2) 6.6 (8) 7(3) -

120 J3«U 55.1(25) 64 (4)* 43(15) 55(5) 574 (10)* 48(5) 48(11) '«'Ta 27.5(15) 25.0 (9) 227(20)* 22(5) 21 (2) 22(8) - “‘Nd 17.9(30) 17.0 (9)

d 29.8<47) d ~

* 5 "Co source in Fe lattice b 2 *Na source in A1 lattice (part of data have been published elsewhere)

c Transitions to excited states observed in addition to the ground-state transition

d Photoexcitation of nuclear level identified from the size of the differential cross section

Table 2. Elastic differential cross sections daidC2{9 =90°) in pb/sr measured with the Ti(n,y) source and compared with theoretical predictions. n: predicted number of levels in a J£ = 25 eV interval at 6.5 MeV. Errors in the last digits are given in parentheses

Scattering

target

6.418 MeV 6.555 MeV 6.759 MeV 7.168 MeV n

exp. th. exp. th. exp. th. exp. th.

23.u 23 (12) 10.3 _ _ _ _ _ _ 45

2 °‘*Bi - - 219(39)"*= 8.0 12 (4) 7.4 1.5(3)- 10 s "* 5.7 0.1 “‘Pb 7.0(15) 8.6 - - 6.5(11) 7.4 - - 0.05 —T1 2^86 (92)** 7.5 - - 13 (3)

b 6.0 - - 0.4 “Hg 12 (3) 7.8 74(17) b 6.5 6.7(15) 6.4 - - 3.4 **'W 159 (10)*-* 6.6 306(33)*-* 6.3 20 (2)*-* 5.6 - -- - 13 '•Ta 68 (4)*-* 6.3 - - - 10.1(12)"* 5.3 - - 28 “s Ho 15 (3)

b 4.7 - i 9.5(14)" 3.9 - - 18 “Ce 4.1(21) 4.1 - - 17 (1)"* 3.6 - - 0.04

"*'Sn 4.2(13) 3.0 - - 2.5 (5) 17 - - 1.9 “Mo 1,474 (44)*-* 2.5 407(39)** 2.5 8.5(15)" * 2.3 817(258)"-* 2.0 0.5 “‘Zn 2.4 (8) 1.6 - - 1.8 (5) 1.5 - - 0.3

1 Transitions to excited states observed " Photocxcitation identified from size of differential cross section

* Photoexcitation reported in [11]

me<

,53

-O

Ut/ijrtl up/ op 227
•

•

'

.

.

'

228
.. .

‘ . . . -

w

A=ise

W

A= 1 86

E- EM. SYM. A 2 v. GeLler. J. HaLpern, and E. G. Muirhead

Phvs. Rev. _L18, 1302-12 (I960) W 186 7J+

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type nance G,N N0X THR C THR BF3-1 4 PI

THRESHOLD

Table I. Summary and comparison of neutron scjki ration energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the centcr-of-moss system in Mev.

K ruction No. runs Present results Other results Method Reference W1 “(7,n)W'M 1 7.28 ±0.06

..m NBS-418

V . F- I 4. Ml

U.s. DEPARTMENT OF COMMERCE

NATIONAL /BUREAU ST AnO*°OS

P • » • ON sj CL *2 A »v Dm t a SiiucT 231
Ref. J.H. Carver, D.C. Peaslee, R.B. Taylor

Phys. Rev. 127 , 2198 ( 1962 )

hlem. Sym. | A

w 186 74

Method 33 MeV electron synchrotron; activation; Be-windown Nal

Ref. No. 62 Ca 2 JHH

Reaction E or AH dE J

rr Notes

(Y,p)Ta

185

Bremss.

32

(y,n)W185

[74 day]

(Y,n)W

185

[1.8 min]

22.5

14

14

55 J MeV-mb

35OOJ MeV-mb

0

4C^ MeV-mb

Absolute yields by comparison with

Ta^^Y, n), Cu85 (Y,n)Cu

82 and

results of Berman and Brown [Phys.

Rev. 26, 83 (195^)].

GAMMA- RAY ENERGY (MaV)

Fig. 7. Excitation functions and derived cross sections for the photodisintegration of tungsten and mercury.

form NBS-418

(8-1-63) U5COMM-DC 18886-P63

u.s. department of commerce

NATIONAL BUREAU OF STAnCAC PHOTONUCLEAR DATA SHEET 232
B. L. Berman, M. A. Kelly, K. L. Bramblett, J.

H. S. Davis, and S. C. Fultz

Phys. Rev. 185 . 1576 (1969)

METHOD

C.U C.M. it M. A T. Caldwell,

186 74

REF. NO.

69 Be 8 hmg

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N* /6*7 + ABX 3- 29 J 8-29 BF3-I 4PI

G.2N** Ibf ABX 8-29 D 3-29 BF3-I 4PI

G,3 N Ibl ABX 3-29 D 8-29 BF3-I 4PI

zto

zio -no

|

iso

mac photocutkn cross SECT I

W

A (e)

1

1

1

| ii

1

li

»

1•

1 Si* III

TTtr.*> T <7.2»>

! 1

1

ISw

1

35 - 30

a

»•

2 is o ioI

miru rwraeuTB* cross secu*

!(«H

IrAi- (r.2»)

10 12 11 16 18 20 ZZ PHOTON OCRGT iMrtfl

Zi 30

Fio. 8. Photoneutron cross sections for W“*: (a) *[(7. »)+

( 7. f»)+(7. 2*) +(7, p2») +(y, 3*)], (b) cC(t. ») + ( 7. /•)!

(c) fC(t. 2m) + (7, p2n)2, (d) »(7, 3»).

* INCLUDES NP ** INCLUDES 2NP

JM±

Ftc. 9. The area ratio RA , nuclear eccentricity «, and intrinsic quadrupoie moment Qo plotted versus neutron number N. The

data were scaled between the value for Gd‘“ and that for WlM. The absolute scale for Qo is based on a mean radius parameter

1.26 F. The lines merely connect the three sets of data points. The experimental uncertainties have been omitted for clarity but are given in Tables VII and VIII; their average values are 0.065 (17%) for RA, 0.010 (1.9%) for «, and 0.26b (5.7%) for Q+

[over

(R ev. 7-1 4-«4> USC OMM-OC 28010-P 84 PHOTONUCLEAR DATA SHEET 233

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table V. Parameter* of Lorentz-curve fit* to the giant resonance.

Nucleus £.(1) (MeV) #.(1) • (mb) T(l) (MeV) £-(2) (MeV) «w(2) • (mb) P(2) (MeV)

Eu“* 12.33*0.06 155*9 2.75*0.26 15.79*0.10 222*6 5.83*0.30 Tb" k 12.22*0.04 181=1=6 2.64*0. 16 15.67*0.06 220*4 4.97*0.19 Gd» 12.23*0.06 215*9 2.77*0.25 15.9640.0* 233*6 5.28*0.30

Ho** 12.28±0.02 214*5 2.57±0.11 15.78*0.04 246*3 5.00*0.17 Tam • 12.59*0.03 171*8 1.94*0.12 15.13*0.12 265*6 4.98*0.23 W“ 12.59*0.03 211*14 2.29*0.14 14.88*0.08 334*8 5.18*0.14

10

R.L. Bramblett, J< T.Harvey,

Caldwell, R.. R.

S.C. Fultz,

Phys.Rev._122, B869

u (1964).

R.L. Bramblett,

J.T. Caldwell, G.F.

Auchampaugh , S.C.

Fultz, Phvs.Rev. 129. 2723 (1963)

. The uncertainties for r. given here are relative. The abaoiute uncertainty ia 7% (!07. far TW" and Ta'«).

k The data of Ref. 10 war* reanalyaed to obtain the valuer given in thia

and subsequent tables (see text).

• The data of Ref. U were reanalyaed to obtain the values given in this and subsequent tables (see text).

Table VIII. Nuclear radius parameters.

Nucleus

(?s* (b) Refs. r* (K)

Os'* (b)

Eu“* 6.99*0.08 e.f 0.595*0.015 1.276*0.018 6.80*0.28 Tb" 7.41*0.11 c 0.598*0.009 1.274*0.013 7.23*0.26

Gd'“ 7.55*0.17 R 0.645*0.014 1.245*0.020 7.71*0.30

Ho'" 7.56*0.11 c 0.604*0.006 1.246*0.011 7.71*0.26

Ta“' 6.89*0.21 h,i 0.433*0.010 1.306*0.025 6.43*0.26

\V>» 5.96*0.06 St it k 0.390*0.006 1.259*0.011 5.96*0.21

* Values taken from or computed from the references listed in column J. * P. It. Stelson and L. Grodxina. Nuci. Data A 1, 21 (1963). h Values from present data (Table VII). k F. K. McGowan and P. H. Stetson. Phys. Rev. 109, 001 (195*).

* Computed from Eq. (2) in the text. 1 E. M. Bernstein and R. Graetser. Phys. Rev. 119, IJ2I ( 19*0).

11 The "best" values for deduced from the present data, computed from 1 R. C. Barrett. S. Bcraow. S. Devons, I. Duerdoth. D. Hillin, J. W.

Eq. (2) in the text, taking Rs to be 1.26:^0.02 F. Kast. W. Y. Lee. E. R. Macagno. J. Raiawater. and C. S. Wu. Columbia

* M. C. Oleson and B. Elbek. Nucl. Phys. 19, 134 (19*0). University Pegnun Nuclear Physics Lab. Report Xo. NYO-72-191. 19M,

* R. A. Camcan. Jr.. P. D. Gupta. R. B. Sutton. M. N. Susukl. A. C. p. 74 (unpublished). Thompson. R. E. Cot*. \V. V. Prestwich, A. K. Gaigalas, and S. Raboy, k R. G. Stobstad and B. Persaoa. Phys. Rev. 170, 1072 (I9M).

Phys. Rev. Letters 20, *74 (196S). Table IX. Integrated cross sections.

. —

Nucleus mm

(MeV)

F|a»C(T. +

(y, £«)]*

(MeV-b)

dta«C(y. 2n) +

W3>'

•*£(y.2n)+(y,p2»)l M>.(l)r<l)+

#ms(y.3»s)* 1 #.(2)r(2)]«

(McV-b) #ut(y, total) k (McV-b)

0.06 NZ/A

(McV-b)

Eu“» 28.9 1.57 0.67 0.04 0.29*0.01 2.70*0.19 2.22 Tb" 28.0 1.41 0.89 d 0.39*0.08 2.47*0.12 2.31 Gd" 29.5 1.45 1.00 0.08 0.39*0.05 2.87*0.20 2.30 Ho1 * 28.9 1.73 0.74 0.04 0.29*0.04 2.80*0.09 2.39

Ta“‘ 24.6 1.31 0.88* f 0.40»±0.08 2.59*0.15 2.61

\V>“ 28.6 1.66 1.19 0.15 6.40*0.05 3.47*0.17 2.67

• All measured integrated cross-section values are given for an energy

region from threshold to £, Ml. b The word "total" in this table refers to the total photoneutron cross

section. #((y. «) + (*/« P") + (V. 2n) + (y. p2n) + (y. Ja)|.

* The uncertainties luted bo* are relative; to get the absolute uncerlaisty, a systematic uncertainty of 7% (10% for Tb*** and Ta,a) must b*

folded into the values for 9m- * Not measured in Ref. 10; #iat[(y. 2») + (y. P2n)I contains

{*lsi(V. J«).

• Because By mas Is so low. these values cannot be compared to the rest.

1 Not measured in Ref. II; the (y, Jnl cross section below 24.6 is MeV

probably negligible.

Table X. Integrated moments* of the measured photoneutron cross section and sum rules.

Nucleus

<r-i (mb)

A-"*

(mb) (mb-McV-*)

<T-1 9.1 K

0.05175 A"

»-t 0.00225 A«* 0.05175 A (MeV) M*

Eu" 148 0. 181 10.18 1.03 1.16*0.11 22.2*1.6 Tb" 151 0.175 10.49 1.00 1.14*0.13 23.0*2.3 Gd" 169 0.195 12.09 1.14 1 .35*0. 13 20.2*1.4 Ho" 166 0.183 11.56 1.04 1.23*0.10 22.2*1.6

Ta>»» k (149) (0.145) (10.66) (0.82) (0.97*0.13) (28.1*2.8)

VV’ws 203 0.191 14.51 1.06 1.26*0.11 21.6*1.5

/»

#»n XUr

rfid 4E and

r*y. rj« /Jtikt

u wlierc 9 ia the total pluMoneutron cross seclioa. »£* 4B, 234 k Because By is to low, the values for Ta‘“ cannot be compared to the rest.
REF. ELEM. SYM. A Z

R. Moreh, A. Phys. Letters

METHOD —

Nof, 0. Shahal and A. Wolf

36B , 71 (1971)

W

REF. NO.

186 74

71 Mo 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G/ LFT 6 D 6,8 SCD-D DST

6.418 MEV

Table 1 Summary of the experimental and theoretical decay propertlea of the reaooaoce levels excited by nuclear photoexcitation.

Scatterer Tranaltloo r- 2*

(keV)

A

(1--2*) rr

(meV)

T(M2)

tfieV) II fl 2 (M2/El)

(X103)

fl2(M2/El)

Welsakopf estimate

(x 10®)

74Ge

6018 - 2200

0.14 a 0.04 120 a IS 190 0.89 17 * 23

11

- 12

3.2

10«Mo

6418 - 1064

0.20 a 0.08 SO a 46 110 0.079 « :S 6.3

112cd . 7632 - 617

0.09 a 0.02 86 a IS 36 0.006 a 10.8

186\y 6418 - 122 -0.011 a 0.014 46 a3S 110 0.023 a 8.7

form NBS-418

(REV. 7-1 4-04) USCOMM-OC 26 010- P6 4 PHOTQNUCLEAR DATA SHEET 235

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A.Mo Goryachev, G.N. Zalesnyi, S.F. Semenko , and B.A.

Yad. Fiz. 463 U973)

Sov. J. Nucl. Phys. 17, 236 (1973)

METHOD

Tulupov

EL EM. SYM.

W

REF. NO.

73 Go 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE G ,XN ABX 8- 20 C 8- 20 BF3-I 4PI

TABLE III wm W* 0»«* Rt» B**® W»t»t

r,.M»v 2.33 2 55 2,13 2.S1 2-83 2.2? MeV 12.5 12.5 12.6 12.7 12.6 12.59

241 225 223 262 250 211

T,. MeV 5.1 5.4 5.7 5.2 53 5.18 Er. MsV 15.6 15.2 14.8 15.4 IS.

6

14.88 338 317 318 315 296 334

0.06 NZ/A. MeV-rnb, 2.65 2.67 2.74 2.68 2 69 2.67 4,0 3.9 3.9 3.6 3.8 3.47 s,/s, 2.8 3.0 3.8 2.5 2.2 3.6

Note. Sj = (ff/2)0(Pj Is the Lorentz are*.

FIG. 2. Cross sections for W184- l86

. Os'*®, and Re ,85> 187

. The cross

-section a

y n + 2ay_ 2n

** denoted by vertical lines whose lengths are twice

the rms errors. The crosses represent the cross sections, corrected for

multiplicity, above the threshold of the (7, 2n) reaction. The solid curves

are Lorentz curve approximations. For W154- 184 and Os190 the calculated dipole transition strengths are shown.

form N3S-4U

IP E V . 7.1 4.641 USCOMM.OC 26010- Pa

4

PHOTONUCLEAR DATA SHEET 236

U.S. DEPARTMENT OF COMMtPC£

NATIONAL BUREAU OF STANQArtOS
REF. A. Wolf, R. Moreh, and 0. Shahal

Nucl. Phys. A227, 373 (1974)

ELEM. SYM.

w

A

186

Z

74

METHOD REF. NO.

74 Wb 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

$ G,G LFT (f 00 D 6-8 SCD-D DST

6 = Doppler width Table 4 Upper limit of ra/r, the temperature variation ratio RT, and the self-absorption ratio R

Scattcrcr

(•/-source)

F-o (MeV)

Fo/r

(±15%)

Ft 3 ) R(%)b

)

65 Cu(Ti) 6.556 0.80 0.94 ±0.02 1.1 ±0.5

69 Gu(Cu) 7.306 • 0.52 1.035±0.004 3.5±0.5

100 Mo(Cu) 7.637 0.28 1.043 ±0.007 0.8n;0.3 100 Mo(Ti) 6.418 0.85 1.032±0.003 0.6±0.3

113 Sn(Cu) 6.988 0.84 1.020 ±0.009 5.7±0.2

1J6 Tc(Cu) 7.915 0.4 ±0.1 0.95 ±0.05 6 ±5

130Te(Cu) 7.637 0.45±0.10 0.84 ±0.05 0.9 ±1.5

139 La(Cu) 7.637 0.55 0.95 ±0.01 2.2±0.3

I29 La(Ti) 6.418 0.78 0.968 ±0.008 6.4±0.8

141 Pr(Cu) 7.915 0.25 1.02 ±0.01 0.9 ±0.9

‘‘ : Pr(Cu) 7.252 0.51 1.005±0.003 5.9±0.4

l44 Nd(Cu) 7.915 0.27 0.89 ±0.05 < 0.5

l80 \V(Ti) 6.418 0.31 1.030±0.004 < 0.5 202 Tl(Ti) 6.418 0.28 1.03 ±0.01 1.6±0.3

20i Tl(Cu) 7.252 0.58 1.02 ±0.01 1 .6 ±0.7

209 3i(Cu) 7.637 1.00 1.00 ±0.02 2 ±1

209 Bi(Ti) 7.168 1.00 0.971 ±0.005 28.0±0.6

*) The values of Rr arc given for 10 g/cm2 thick scattercrs placed at an angle of 60° and a

detector angle of 135\

“) The values of R are given for the same scatterer-dctector geometry as that of RT and a 20 g/cm 2 thick absorber.

Table 7 Summary of F, -T0 and 6 of resonance levels measured in the present work and in earlier works d 1 ’ • 1 '

Isotope Energy F To 0 Ground state (MeV) (mcV) (mcV) (eV) transition

45 Cu 6.556 70 + <5° /U -20 2S: 18 11.2 L.-0.3 69 Ga a

) 7.306 I05±40 48 ± 7 6.2 ±0.5 HI

l00 Mo c

) 7.637 140 ±40 40- 5 4.5 -o.5 El

100Mo c ) 6.418 50 ±35 25 ± 3 4.25 =0.25 El

ll *Su 6.988 1 52 ± 5 123 ± 3 5.5 ±0.5 El

l2STe 7.915 12± 6 5± 2 11 ±2 Ml

l20Tc 7.637 60±30 30±10 15 ±2 El

139 La b

) 7.637 170±40 47 ± 6 10.5 ±0.5 El

l39La *) 6.418 85: 13 67± 8 9.5 ±0.5 iZ 1 tAtpr k) 7.915 7± 3 2± 1 6.6 -1.0 Mi

i*tpr b) 7.252 290±30 110±10 6.4 ±0.5

14 *Nd b) 7.915 30±10 8± 3 14.0 ±0.5 Mi

1 8G 6.418 46±35 6± 3 1 ±1 El

303T1 b

) 6.418 350±60 S2±I5 0.5 ±0.5

2 0 3-pj bj 7.252 50 ±30 25 ± 6 5.2 ±1.5 Ml

J09 Bi 7.637 > 500 > 30

i09 Bi b

) 7.168 S20±40 820±40 5.8 ±0.3 El

") Ref. *«). ») Ref. 8

). ') Ref. 17

). ( oVer)

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 20010-P64 PHOTONUCLEAR DATA SHEET 237

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOAROS
Table 6 Values of A z , /V||,Wx, spins, and mixing amplitudes .v

Scatterer E0 Az Nn /N± J0n J" J

F

(“/-source) (MeV)

63 Cu(Ti) 6.556 0 J- #- 0

S9Ga(Cu) 7.306 1) R. Moreh et al. P.ev. 0.14 ±0.01 !.046±0.022 IX - i* 3- u 0 lays.

100 Mo(Cu) 7.637 0.49 ±0.05 1.17 -0.05 6

* i- o

t 0 G2 (1970) 1144

I00 Mo(Cu) 7. 102 “) 0.013±0.016 o

+ i- -0.06-0.02 b

) 8 ) A. Tvblf, 2 t al. Faye. Rev. 100 Mo(Ti)

100 Mo(Ti)

6.418 5.355“)

0.52 ±0.02

0.19 -0.08

1.15 ±0.03 o

+ 0

* i1 - 0

+

*> +

0

C. 21 -O.I 2

b

l C6 (1972) 2276

II8 Sn(Cu) 6.988 0.48 ±0.02 1.12 ±0.05 0

+

i - 0

+ 0 15) R. Moreh et al. V Phys. Lett

l26Te(Cu) 7.915 0.46 ±0.11 0.S 6 =0.I 0 0

+

i + 0

T 0 36B (1971 ) 71

,30Te(Cu) 7.637 0.48 ±0.04 1.12 ±0.04 0

+ i- 0

+ 0 16) R. Korah et al. Phys. Rev. 139 La(Cu)

139 La(Ti)

7.637

6.418

0.16 ±0.02

0.093 -t-0.004 1.024±0.015 1.018-0.006 .7 4*

7 -

r

v. -

7 i-

.7.+ 00 C7 (1S73) 1335

14I Pr(Cu) 7.915 0.41 ±0.06 0.94 -0.03 * + l

+ a. + [) +0.13 17) R. Moreh et al. 9 Nucl. Phys

14, Pr(Cu) 7.252 0.23 ±0.06 1.03 ±0.02 r, + »-

i * 0 A217 (1973) 477

144Nd(Cu)

1 36 W(Ti)

1S6 \V(Ti)

7.915

6.418 6.296 “)

0.50 ±0.03

0.49 ±0.05

-0.011 ±0.014

0.92 ±0.09

1.15 ±0.06

o

+ o

+ o

+

i

1

- Il0

+ 0

+ 2

+

0

0 - 0. 10 -0. 0. c 29) R. Moreh et al.

C4 (1971) 2265

9 Phys. Rev.

203Tl(Ti) 6.418 0 1.01 ±0.01 4

+ 4 4- 0 30) R. I loreh et al. 9 Pays. Rev.

20iTl(Cu) 7.252 0.71 ±0.08 0.90 ±0.02 4+ -C.25-0.0j 178 (1965) 1961 205TI(Cu) 7.047 “) -0.69 ±0.03 .1 -r -r 0.33-0.04

209 Bi(Cu) 7.637 0.24 ±0.04 j-

(i)

J).— 209 Bi(Ti) 7.168 0.20 ±0.02 1.040±0.015 j> + r!”

Errors refer to one standard deviation.

“) Inelastic transitions.

b

) Ref. 17

). ') Ref. IS

). Tadle 8 Values of Flt D, l: Ll and t >, t

El transitions Ml transitions

scatterer (/-source) E0 -> Ec (McV)

Ft (mcV)

D

(eV)

/<F.l (10" y MeV* 3

)

scatterer

(•/-source)

I-o — E( (McV)

r, (mcV)L (eV) (Id

- 9 ,

62 Ni(Fc) “) 7.646 12300 126Te(Cu) 7.915 260

-> 1.172 24 0.5 -> 0.666 2.3 -> 1.421 1.7

® 9 Ga(Cu) 7.306 660

-> 0.572 3.2 1.0 141 Pr(Cu) 7.915 90

-> 0.872 2.7 0.9 -> 1.298 1.3 -> 1.437 O.S 100 Mo(Cu) 7.637 670 -> 1.580 1.4 ->0.535 40 7.7 -> 1.655 1.0 -> 1.063 5.7 1.4 -> 1.461 1.4 0.4 ‘“Pr(Fe) “) 7.632 170

112 Cd(Fc) b

) 7.632 350 ->0.145

-> 1.130

5.6 6.4 1 ->0.617 11 4

-> 1.223 7.3 3.4

v | 437 5 (5

1 -> 1.429 2 1 -> 1.451 1 -> 1.468 1.7 0.9 -> 1.582 t.i 130Tc(Cu) 7.637 360 ->0.837 16 5.5 144Nd(C.i) 7.915 3S0

-> 1.589' 18 8.8 -> 0.697 13 -> 1.041 2.7

139La(Cu) 7.637 190 -> 1.564 6.2 -> 1.384 3 2.5 -> 1.538 3 2.7 205Tl(Cu) 7.252 1200 -> 0.205 4

141 Pr(Cu) 7.252 220

->0.146 82 38 -> 1.120 8.6 6.5

IS 6W(Cu) 6.418 no

-> 0.122 12 14

The values of D refer to an excitation energy E0 . *) Ref. *)• b

) Ref. 29

). ') Ref. 30).

238
aeF.

METHOD

G.M. Gurevich, L.E. Lazareva, V.M. Mazur,

G.V. Solodukhov, V.A. Tyutin

JETP Lett. 28, 157 (1978)

Pis'ma Zh. Eksp. Teor. Fiz. 28, 168 (1978)

S.Yu. Merkulov, EL EM. SYM. A

W

REF. NO.

186 74

78 Gu 7 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,MU-T ABX THR-28 C UKN NAI-D 4PI

The absorption method is used to measure the total photoabsorption cross

section curves for deformed l54Sm, l56 Gd, l68 Er,

l74Yb, l84W, and l86W

nuclei in the region of the £1 giant resonance. The behavior of the resonance widths for nuclei in the interval A = 153 to 186 is discussed. PACS numbers: 24.30.Cz, 25.20. + y, 27.70. +q

TABLE I.

a

i rt E 2

CT2 r2 r P

7/V a

" L, /0.06 —A

Nucleus MeV mb MeV MeV mb MeV MeV b

15 «Sm 12.2 188 3.4 15.7 207 5.7 8.1 ±0.2 6.3 ± 0.3 0.32 ±0.02 1.28

156 Gd 12.3 206 3.2 15.7 220 5.5 7.7 ±0.2 6.2 ±0.3 0.31 ±0.02 1.30 ,68 Er 11.9 222 3.2 15.5 275 4.5 7.4 ±0.2 7.5 ±0.7 0.32 ±0.03 1.26

l74 Y b 12.3 297 2.9 15.5 320 4.9 7.1 ±0.2 7.0 ±0.6 0.30 ±0.02 1.52

18 *W 11.9 315 2.9 14.8 321 4.7 6.8 ±0.2 7.2 ± 0.8 0.27 ±0.03 1.50

l 8 6^ 12.0 246 3.3 14.5 332 5.1 6.4 ±0.2 6.2 ±0.8 0.23 ±0.03 1.48

Average

error ±1.3% ± 10.5% ±7.5% ±1.3% ±9.4% ±3.8% — — — —

(over)

form N3S-418

(R CV. 7*1 4-64) U3COMM-NBS-OC PHOTONUCLEAR DATA SHEET 239

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
FIG. 2. Total cross sections of the photoabsorption of the nuclei l,4 Sm, '"‘Gd, '“Er, "4 Yb, l44 W, and "*W. The mean

squared errors are shown.

FIG. 3. Experimental values of AT = T — (E, — £,) in the region of deformed nuclei with A = 153-186: O—present work and" 1 : •—Saclay group; —Livermore group. Owing to a small systematic deviations of

the absolute values, the ordinate scales for the Saclay and Livermore data are shifted 0.15 MeV upward and downward, respectively. The (T, + T,) curve was obtained from the AT curve after introduction of corrections in the interval A = 175-186.

240
" eF- 6j. Gunther, R. Haag, K. Huber, U. Kneissl, H. Krieger, H.J. Maier,

H. Stroher

Phys. Rev. Lett. 44, 716 (1980)

EL EM. SYM.

w 186 74

METHOD REF. NO.

80 Gu 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,F NOX THR-55 D 35-55 TRK-D 4PI

Low end of experimental arrows in Fig. 1 indicated lower limit for fission barriers

established by this experiment.

The electroInduced fission of ,E - 1M * 18SW has been investigated in the energy range from

35 to 55 MeV. The fission barriers, estimated by a statistical-model analysis of the measured cross sections, are compared with theoretical predictions and are only consistent with the assumption of a constant pairing strength.

FIG. 1. Calculated fission barriers (Ref. 3) (full lines, G=const; dashed lines, G~S) and limits deduced from

our experiments on ,E * 184 • I8€ W.

FORM N8S-418

(RKV. 7. t 4*641 USCOMM-NBS-OC PHOTOHUCLEAR DATA SHEET 241

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARDS
REF. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V. A. Tyutin

Nucl . Phys. A351 , 257 (1981)

ELEM. SYM.

w

A

186

Z

74

METHOD REF. NO.

81 Gu 2 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,MU-T ABX THR-20 C 27 NAI-D 4PI

Abstract : The curves of the total gamma-absorption cross sections (<r lat ) in the E I giant resonance energy range for the nuclei ,!4Sm.' ,? "Gd. '"’Ho. lh8 Er.

'' 4Yb. 178 Hf. l80 Hf. ,8, Ta. ,82 W. ,84W. ""W

and ‘‘'’Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections <t,„, are given. Quadrupole moments (Q0) and nuclear deformation

parameters (II) were obtained. For deformed nuclei in the - 155 < .4 < ~ 1 80 region a violation of the correlation between

giant resonance widths If) and nuclear deformation parameters was found, f, and f,, the widths

of the resonances corresponding to s ibrations of nucleons along and across the nuclear deformation

axis, were observed to decrease with the increase of A which could be accounted for by the presence of an ;V = 108 subshell.

Fig. 2. Total nuclear y-absorption cross sections |/r

llH ) measured bv the absorption method for l,4Sm.

15 "Gd. '"’Ho. '""F.r.

1 4 Yb. ’’"Ilf. '""Ilf. '"‘Ta. ,82 W. '" 4 W. '""W and |47 Au. Rms error bars are form

(REV. . . , use OMM-N BS-DC

shown. PHOTONUCLEAR DATA SHEET ’-42

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
Table 2 Parameters of Lorentz curves fitting the experimental data on cr 11M

Nucleus E, a\ r, E, a z r. <x,r. r

(MeV) (mb) (MeV) (MeV) (mb) (MeV)

, (MeV)

' 54Sm 12.2 188 3.4 15.7 207 5.7 1.85 8.1

,5<, Gd 12.3 206 3.2 15.7 220 5/5 1.81 7.7 ""Ho 12.3 202 2.3 15.2 239 4.8 2.47 7.0 '“Er 11.9 3.2 15.5 275 4.5 1.73 7.4

1 ’ 4Yb 12.3 297 2.9 15.5 320 4.9 1.80 7.1. ,18 Hf 12.2 291 3.1 15.5 334 4 9 1.80 7.2

'm

"°Hf 12.2 286 3.2 15.3 324 5.1 1.81 7.1 Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8 "-W 11.9 267 3.2 14.8 303 5.6 2.01 6.8 '**W 1 1.9 315 2.9 14.8 321 4.7 1.65 6.8

1 86^jy 12.0 246 3.3 14.5 332 5.1 2.07 6.4

1,7 Au 13.7 535 5.2

Average

error

1.4

11 . 2

' 9.3 ' 9.7 " 4.6' 0.22

0.2 MeV

T \m i 3

Ratios of nuclear ellipsoid axes (E ). deformation parameters ( /() and intrinsic quadrupole moments ((?„). calculated from Ev

Nucleus ' , '1 Sm ‘"Tid ""iio ""Er

'* 4 Yb ''"Ilf '""Ilf '"'Ta i« w ,H4 W ' K "W

k 1 320 1.302 1.259 1.327 1.289 1.296 1.28! 1.263 1.271 1 268 1 229

II 0 326

til 017

0 309 ± 0 016

0 266 ± 0 036

0.334 ±0 0320.296 ±0.024

0.303 ±0.032

0.288 ±0 036

0.270 ± 0 026

0.278 ±0.030

0.274 ±0 0320 235 ±0 033

L>.. 6 3 5 0 3

t> 2 ± 0 3

5.8 7 5 ±0 7

7 0 ±067.5 ±0 8

7.2 ±0 9

6.9 ±0.77.2 ±0 87 1 ±0 86 2

+ 0 9

Tahi k 4

Integral charaelcristies of El giant resonance

e»p ^t*L • « i a IL

_ j 4 J a n. A fT , <T

- 2L

_ j S3

21 A (MeV b) 0.06.VZ A ( MeV b) 0 06 V/ .4 (mb) (nib) (mb) (mb MeV ') (nib • MeV ') (/ib MeV ')

'•Sm 1 94 ±0.06 0.87 2.86 1.29 1 1 7 ± 3.5 156 0.189 9.1 ±0.3 14.3 3.23

' "Gd 2.07 ±0.07 0.91 2.95 1.30 143 ± 4.6 163 0.194 10.5 ±0.4 14 9 3.30 ""tlo 1 86 ±0 06 0.78 2.53 1.06 155 ±4.4 160 0.177 10.1 ±0.3 12.6 2.54 ""Er 2. 24 ±0.06 0 92 3.07 1.26 161 ±4.3 197 0.212 1 2.0 ±0.3 16.0 3 13 b 2.69 ± 0 o5 1.07 3.82 1.52 195 ±3.4 240 0.247 14.5 ±0.3 19.2 3.54 ‘""Hf 2 85 ±0.07 l.ll 3.99 1.55 208 ±4.

9

247 0.247 1 5.3 ± 0.4 20.2 3.59

'""lit 2. '2 ± 0 06 1.05 4 03 1.56 2U0±4.4 250 0.246 15.1 ±0.3 20.7 3.61 "’Ta 2 84 ±0.1)7 1.09 3.81 1.46 2 1 0 ± 5.3 245 0.239 I6.0±0.4 20.0 3.45

' '"-W 2. >6 ±0.07 1 09 4.01 1.52 21 1 ±5.3 256 0.248 16.2 ±0.4 21.6 3.70

2 '8 ±0 07 1 05 3.80 1.43 207 ±5.3 251 0.240 1 5 9±0.4 20.9 3 51

"• r \v 2 90 ±0 07 1 08 3.95 1.48 21 4 ± 5.3 256 0.241 16.2 ±0.4 21.6 3.56

‘ v

‘ Au 3 1 2 ± 0 06 1 10 4.37 1.54 229 ±4.2 276 0.241 1 8. 6 ± 0.

4

23.3 3.49

243
.

-

_

'
Re

RHENIUM

1=15

Credit for the discovery of rhenium goes to the German

chemists Waiter Noddack, Ida Tacke later Ida Noddack,

and Otto Berg. Their discovery, based on the x-ray

examinations of columbite and various platinum ores, was not

accidental but the result of a three year search begun by

studying the relative frequencies of known elements in the

earth's crust. Noddack, Tacke, and Berg found that elements

of odd atomic number are less common than those of even number. Using this information combined with the known

frequency of occurance of platinum ores and of columbite,

they obtained an approximate idea of the extent of the

extraction process. In May of 1925, they accomplished a 100,000-fold concentration of element 75 and established the

existence of the new element. They named it rhenium

derived from the Latin word Rhenus for the German Rhine

river.

Re

245
-

'
REF. A. V. Mitrofanova, Yu. N. Ranyuk, and P. V. Sorokin

J. Nucl. Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

— EL EM. SYM. A z

Re 75

REF. NO.

67 Mi 1 HMG

METHOD

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 = 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

Nucleus Kissionability D

Cross

section <7. . m/3

Nucleus Kissionability 1)

Bi 0.11 -0.01 7.8±0.l» Os 0.0058 ±0.0005 Pb • •

.

1 '.'(U^O.Oii/* 3.4±0.3 Ro 0.0056 ±0,0006

T1 “."•II .x 0.1)03 2 ; 1 ±0,2 Ta 0.0045 ±0,0005

Vu T."1U±0,002

0.ulJx0.Qt)2

1.25±0.10

0.80±0.08

Hf 0.0042±0.0004

Cross

section <rK . m/3

0,37±0.04

0.35±0,04

0.27±0.03

0.25±0.03

Eo. OeV

Fig. 2. Photofission fragment yields as a function of Z*IA. The

ordinates are values of <ra in units of cm*.

form NBS-418

(REV. 7-1 4-54) USC OMM-OC 25010-P54

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS | PHOTONUCLEAR DATA SHEET 247
REF' Yu. N. Ranyuk and P. V. Sorokin

J. Nuclo Phys. (USSR) jj. 37 (1967)

Sov. J. Nucl. Phys. 2 ? ^6 (1967)

METHOD

EL EM. SYM. A z

Re 75

REF. NO. 67 Ra 2 HMG

REACTION RESULT

EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RAN GE TYPE RANGE

G.F ABX THR- 260 C 200-260 EMUI

4PI

Fig. 4. Photofission crow sections of Os, Re. Ta, and Hf aa functiona of photon energy.

TABLE III

h. MeV

Cross section per equivalent y quantum, 10'“ cm*

os Ra Ta Ht

200 17+2 11.8+0.8 5. 2+0.

3

3. 2+0.

7

220 224-2 17+1 8. 6+0.

5

4 .8+0.3

240 334-3 294-1 13.0+0.6 8. 2+0.

4

260 45B 38±2 17.2+0.7 11.2+0.5

form NBS-418

(REV. 7-14.S4) USC OMM* O C 29010-P94 PHOTONUCLEAR DATA SHEET 248

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A. Veyssiere, H. Beil, R. Bergere, P. A. De Miniac

J. Phys. Lett. 36^ L267 (1975)

METHOD

Carlos, A. Lepretre,

ELEM. SYM.

Re 75

REF. NO.

7 5 Ve 5 egf

REACTION

' EXCITATION SOURCE OETECTOR

RESULT ANGLE ENERGY TYPE RANGE TYPE RANGE

G,N* ABX 8- 22 D 8- 22 mod-i 4PI

G,2N** ABX 13- 22 D 8- 22 MOD1

4PI

-

Abstract — Partial photoneutron cross-sections [<r(y, n) + e(y, pn)], and o(y, 2a) of W, Re, Ir, * 1023+

Pt and Hg were measured by means of monochromatic photons of 8 MeV < E < 22 MeV so as to *

1024

study the giant resonance. The experimentally observed evolution of the shape of the GDR, as one

proceeds from permanently deformed prolate nuclei (W and Re) towards oblate or even triaxial gamma unstable nuclei (Pt), corresponds to the theoretical predictions of the dynamic collective modeL

t£.n> CROSS-SECTIONS t J,2rt CROSS SECTIONS

FlO. I.- Sections effaces parodies «(,. n) + cij, pn) de> F,a' *--S**» P^Ues *7, 2a) des noyaux W,

noyaux W, Re, Ir, Pt, Hg.

Re> lr’ Hg'

(over)

form N3S-418

(REV. 7-14- 64) USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 249

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
soo

iOTflL CROSS-SECTIONS

FiO. 3. — Sections eflicaces totales a-^E) des noyaux W, Re,

Ir, Pt, Hg.

Tableau I ri Ex *2 r2 e2 mb MeV MeV mb MeV MeV

w 300 3,2 12,7 290 4,3 15,4

Re 310 3.3 12,8 330 4,45 15,4

250
REF. V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257, 438 (1976)

ELEM. SYM.

Re 75

METHOD REF. NO. 76 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.F ABY THR-999 c 999 TRK-I 4PI

Table 1 Measured values ofrr, at £= 1000 NleV and deduced values of assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z

2//4 °

4

(mb)

£o (MeV) (mb)

Bi 32.96 122 ±0.6 200 7.6 +0.6 Pb 32.45 5.4 ±0.4 220 3.6+02

T1 32.10 4.1 ±0.3 230 2.8 ±0.3 Au 31.68 2.0±0.15 240 1.4 + 02

pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10" 1 Re 3021 (3.7 ±0.3) x 10“ 1 280 12.9 ±0.3) x 10- 1 W 29.78 (3.5 ±0.3) x 10'* 290 (2.8 ±0.3) x 10- 1 Ta 29.45 (32 ±0.3) x 10" 1 300 (2.7 ±0.3) x 10" 1 Hf 29.04 (1.7 ±0.2) x 10' 1 310 ( 1.4 ±02) x 10- 1 Yb 28.31 (1.3 ±0.1) x 10*' 330 (1.2±0.1)x 10~ l Tm 28.18 (7.5 ±0.8) x 10 -2

335 (6.8 ±0.8) x 10" 2 Ho 2721 (3.6 ±0.4) x 10* 2 355 (3.5 ±0.4) x 10* 2 Dy 26.80 (2.6 ±0.3) x 10- 2 360 (2.5±0.3)x 10' 2 Tb 26.58 • (22 ±0.3) x 10- 2 370 (2.5 ±02) x 10- 2 Gd 26.04 (1.6 ±02) x 10' 2 380 (1.7 ±02) x 10" 2 Sm 25.56 (1.3±0.2)x 10" 2 290 ( 1 .4 ± 02) x 10“ 2 Nd 24.96 (9.2 ±0.9) x 10* 3 405 (1 ±0.1) x 10" 2 Ce 24.00 (8 ±0.9) x 10' 3 420 (9 +1 ) x 10“ 3 La 23.39 (8.4 ±0.9) x 10* 3 430 (1 ±0.1)xl0- 3 Sb 21.36 (12 ±02) x 10~ 2 460 ( 1.5 ±0.3) x 10- 2 Te 21.19 (8.8 ± 1 ) x 10' 3 465 (12 ±02) x 10" 2 Sn 21.06 (1.3±0.2)x 10" 2 465 ( 1.7 ±02) x 10' 2 Cd 20.49 (1.7 ±0.3) x 10" 2 470 (22 + 0.4) x 10* 2 Ag 20.47 (2 ±0.3) x 10- 2 470 (2.6 ±0.4) x 10" 2 Zn 13.76 (2 ±0.4) x 10" 1 515 (3 +0.6) x 10“ 1 Cu 13.44 (2.4 ±0.5) x 10" 1 515 (3.6 + 0.8) x 10~ 1 Ni 13.35 (2.4 ± 0.5) x 10* 1 510 (3.6 ±0.8) x 10- 1 Fe 12.10 (3 ±0.6) x 10-' 510 (4.4 ±0.9) x 10’ 1

Fig. 2. Nuclear fissilities as a function of Z'-jA. Experimental points solid circles represent our data;

squares, the data from ref. *); open circles, the data from ref t. and crosses, the data from (p,f) experi- ments10

). The straight line is the best fit calculated from our data tor Z- .-1 > 26. The dashed curve is the curve VI calculated by Niv and Sassi' 2

I. form N3S-418

(REV. 7- t 4-641 USC OMM-N BS-0 C

4

A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6_, 512 (1968) . ^T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

12

J.R. Nix et al . , Nucl. Phys.

81, 61 (1966)

.

20

N.A. Perifilov et al., JETP

(Sov. Phys . ) 14_, 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol. 2 (IAEA) Vienna,

1965, p.283

.

PHOTONUCLEAR DATASHEET 251

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
sgF. V. Bellini, V. Emma, A.S. Figuera, S. Lo Nigro, C. Milone,

G.S. Pappalardo, G. Bologna

II Nuovo Cimento 47A, 529 (1978)

EL EM. SVM.

Re 75

METHOD REF. NO.

78 Be 10

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F RLX 180-999 C 220-999 IRK-D 4PI

Zero cross section assumed below 180 MeV. COHERENT BREM.

Summary. — The photofission yields of Re, W and Ta induced by ;i coherent bromsstrahiung beam from 1000 MeV electrons striking a diamond single crystal have been measured. The experiment has beer performed at eighteen different energies of the main peak of the photon

spectrum, in the energy range between 220 MeV and 550 MeV, by detecting the fission fragments with glass sandwiches. The behaviour of tho photofission cross-section has been deduced from the experimental yields by

using an appropriate unfolding method. The obtained curves clearly

show a first resonance centred at a photon energy k ~ 350 MeV with a ^^HM ~ 145 Mcv, while there is a hint of a second resonance at k~ 750 MeV . Information on the energy dependence of the nuclear fis- sility from 100 MeV to 1000 MeV has been deduced from the comparison

of the estimated photofission cross-section with the total photon interaction

cross-section. It ka3 been found that tho photoniesonic model of the fis- sion process permits to explain the energy dependence of our photofission

cross-sections if a nuclear fissility increasing with photon energy is assumed.

Fig. 3.

Fig. 3. — Photoftssion yields per equivalent quantum as a function of the first-peak energy k, of photons. The dots are the experimental data; the dashed curvo represents

the yield function recalculated from tho f{k) data. Results for Re.

Fig. 11- — Nuclear fissility Pt as a function of tho photon energy lc. The curves arc normalized at k = 1000 MeV. a) Bi, b) Pb, c) Au, d) Ta.

Fig. 6. - Photofission cross-section estimated by our unfolding method. Results for Re (y, f).

FORM N&S-418

(REV. 7-14.441 USC OMM-N BS*0 C

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS PHOTONUCLEAR DATA SHEET 252
Table II. - Estimated ft values and corresponding errors. All the data are given in arbitrary units.

k f{k) (arbitrary units)

(-McV) Re \V Ta

100 — 0.31 0.85 — 0.14 - 0.S5 —0.49 ± 0.S7 160 0.03 = 0.31 0.24 ± 0.31 0.26 ± 0.33 220 1.95 ± 0.41 2.50 = 0.41 2.51 ± 0.41 280 6.26 ± 0.53 6.51 + 0.53 6.63 — 0.55 340 S.90 ± 0.69 8.75 A 0.69 8.56 ± 0.68 400 8.16 ± 0.72 8.38 ± 0.72 7.15 ± 0.70 460 6.10 ± 0.51 6.34 ± 0.51 5.43 ± 0.49 520 4.83 ± 0.47 5.04 ± 0.47 4.70 ± 0.48 580 4.70 ± 0.57 4.95 zz 0.57 4.72 ± 0.58 640 4.96 ± 0.59 5.20 ± 0.59 4.98 ± 0.60 700 5.41 ± 0.58 5.57 ± 0.58 5.29 ± 0.58 760 5.68 — 0.57 5.78 — 0.57 5.41 A 0.57 820 5.65 d: 0.61 5.71 ± 0.61 5.32 ± 0.61 880 5.51 4- 0.67 5.53 ~ 0.67 5.18 ± 0.67 940 5.38 ± 0.74 5.36 ± 0.74 4.98 ± 0.73 1000 5.23 ± 0.80 5.18 ± 0.80 4.70 ± 0.77

253

Re

A= 185

—

'

REF. F. R. Metzger

Phys. Rev. JJ17,, 1060 (1967)

ELEM. SYM. A

METHOD

Re

REF. NO.

185 75

67 Me 1 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ? G LET 0- 1 D 0-

1

SCD-D 0-1 DST

J-PI

I'm'-i i II. Summary of the results of the resonance-scattering

e\|>i ntm tils The factor j

In columns 2 and 4 is the ratio of the

statistical weights of the excited state and the ground state, i.e., K - 1 2/,.v.. 4- 1 )/(2/ 0 4- 1). Tor the 646- and 874-keV transitions, the

internal conversion is responsible for the small difference between

I'n anti 1’.

Level energy

(keV) giv/r

(10-‘ eV) r,/r

*r.

(10-* eV)

646 2.37±0.15 0.99 2.39±0.15

718 4.8 ±1.0 0.70* 6.9 ±1.4

874 27 ±3 0.99 27.3 ±3

• The 72-keV transition from the 718-lceV level was assumed to account

for O.-tTi of the 0slu disintegrations (Ref. 1).

1 M. W. Johns, S. V. Nablo, and W. J. King~Can. J. Phys. 35, 1159 (1957).

Table Hfc Transition probabilities for the y transitions in Re1 ** studied in this paper and listed in column 1. The spin assign- ments and branching ratios used to arrive at these transition probabilities are listed in columns 2 and 3. The information avail- able on the reduced El transition probabilities is listed in the last column .

Transition energy

(keV)

Spins

/<-// i\/r„

Transition

probability

(sec-1

) B (£2) (10-«Vcm<)

592 H 0.32 5.0 X10“> 5.6±1.3

646 H 1 10.9 X10>° 7.9±0.6

718 M 1 15.6 X10>» <6.6±2.3

749 W <0.002 <0.13X10W <0.02

874 H 1 62.3 X10i» <1.0»

• According to Ref. 4.

* K. Maaek Disgdrd (private communication).

form NBS-418

(R EV. 7-1 4-64) USCOMM-OC 260I0-P64 PHOTONUCLEAR DATA SHEET 257

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUREAUOF STANDARDS
A.M. Goryachev, G. N. Zalesnyl, S.F. Semenko , and B.A. Tulupov

Yad. Fia. 17, 463 (1973)

Sov. J. Nucl. Phya. 17, 236 (1973)

EL EM. SYM.

Re 185 75

REF. NO.

73 Go 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OET ECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABX 8- 20 C 8- 20 BF3-I 4PI

FIG. 2. Cross sections for W184- 184

, Os190

, and Re 1 83- > 87

. The cross section <Jy n + 2o

7_ 2n

is denoted by vertical lines whose lengths are twice

the rms errors. The crosses represent the cross sections, corrected for

multiplicity, above the threshold of the (7, 2n) reaction. The solid curves

are Lorentz curve approximations. For W1 *4- 154 and Os190 the calculated

-dipole transition strengths are shown.

TABLE III w» w* 0*m w»("!

r,, MeV 2.33 2.55 2,13 2. 51 2.83 2.2* £„ M«V 12.3 12.5 12.6 12.7 126 12.59 241 225 223 262 250 211

Tj, MeV S.l 5.4 5.7 5.2 5-3 5.18

£2, MeV 15.8 15.2 14.8 15.4 15.6 14.88 mb 338 317 318 315 296 334

0.06 NZ/A. MeV-mb 2.65 2.67 2.74 2.68 2 69 2.67

S, S,. MeV- mb - 4.0 3.9 3.9 3.6 3.8 3.47 s,/s, 2.8 3.0 3.8 2.5 2,2 3.6

Note. Sj » (»/2)ol ri is the Lorentz area.

form NSS-418

IR EV. 7-1 4.S4I J5COMM.SC 2«0!0.Pa4 PHOTONUCLEAR DATA SHEET 258

U.S. DEPARTMENT OF COMMtPC j- NATIONAL BUREAU OF STAMOARDS
-

.

H- I O /
260
EL EM. S YM. x. *\ . GeLler, J. Halpern, and £. G. Muirhead

Phys. Rev. _Ll3, 1302-12 (i960)

Re I87 75

-I^HCDBetatron; neutron threshold; ion chamberREF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccntcr-of-mass system in Mev.

KnicliiMt No. runs Present results Other results Method Reference

Re1"(7.»)Re»“ 7.18 ±0.08

N3S-418 :G7CN*JCL3;,r: n.-.; s;;737 261

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOT ^TANOAOOS
REF. H. Langhoff

Phys. Rev. BL-8 (1964)

ELEM. SYM.

Re 187 75

METHOD

187 187*

Radioactive source: W -» Re + e' ; centrifuge technique

REF. NO.

64 La 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 0-1 D 0-

1

NAI-D DST

MIXING AMPLITUDES

Taiile I. Summary of the experimental results. From the results of the resonance fluorescence experiments listed in columns 2 and 3, the data in columns 6 and 8 have been calculated using spins, multipole orders, and branching ratios given by Gallagher et al. (Ref. 4) and reproduced in columns 4, 5, and 7.

Angular Mixing

Ey distribution sziv/sir Assumed Multipole amplitude Tlovel (kcV) Al (eV) spins order 5 r0/r (see)

864.5 <1.3X10-* 4+

,i+ -P .V/l 0.54 >1.0X10-'“

773 + (0.03 ±0.05) (1.75±0.22)X10-> 1 >85% .1/1 / <15% El —0.40<i<0.15 1 (2.5±0.3)X10-11

686,1 + (0.21 ±0.10) (1.82±0.16)X10-« r-r El —G.10<5<0.15 0.49 (8.5±0.7)X10-w

551.7 <0 r- i+ \ /!l / <1% Ml

479.4 — (0.10±0.24) 5" El

625.3

618.2 1— (0.17±0.25) (2.5±0.3)X 10-6 r-r 2+ . s + El >85% Ml —0.40<5<0.15

0.82

0.96 (1.6±0.2)X10~"

511.3 <4X10-* i+ „ 4+

2 1 >99% El 1 >6X10-'*

Table II. Summary of the known transition probabilities in Re187

. The experimental results Tcxp are compared with theoretical predictions: Twtimkopf calculated with the Weisskopf formula omitting spin factors and Tniusoo calculated using Nilsson wave functions.

Assumed Ey Multipole

(keV) Spins order

134.3

206.3

72.0 618.2

106.6 625.3

113.7 773

864.5

246.3

239.3 880

686.1

551.7 479.4

511.3

.171 £2

.1/2 El

, 1/1 A/1 + ( FI) El

.1/1 + (A'2)

.1/1 El

.1/1 + (El) Ml +(E1) \n+(Ei)

m+(Ei)

El

FA

FAEl

El

7exp ( This

experiment

(sec ')

Others

T.rp TWe isskopf

Nilsson Model

Assumed

states Tsu^oa T1 exp Niluoo 2.4X10'“* 1/2 31 rot —* 31 2.8X10'“ l . 7.1X108* 200 31 rot —

•

31 7.0X108

l 6.0X 10“b 1/88 32 — 31 1.2X10* 1/2

6.1X10'"' 1/2X10-8 K forbidden 0 f 5.9X10'“ 1/80 K forbidden 0 f 3.9X 10s 1/70 43 — 7 vibr. 0 f 43 — 31 4.3X107 43 — 7 vlbr. 0

4. OX 10'“ <8X10"

1/2 42 — 31 42 — 31 2.0X10'“ 5.2X107 1/5 <5.5X10" <1/23 33 — 31 8.1X10'“ <1/15

<2.5X 10"° <1.9X10"

<1.2X10"

3X10""

<1/50 27 — 31 33 — 43 rot 33 — 43

1.4X 10‘“ 2.0X10"

2.2X10"

<1/5

5.7X 10'“° 1/2X10-* 36 — 31 1.8X10‘“ (3) 1.0X10'“* 1/6X10-* 36 — 31 rot 3.6X10“ (3) 4.9X10'“* 24 5.1X10'“ 18 . . .

• Kefs. 10. 13, and 17.

b Refs. 14 and 15.

0 Computed with branching ratios of Ref. 6.

d Calculated from the result given in Ref. 11. assuming giTo/gtr — 1

.

* The result of Vartapetyan is about 1/30 of this value (see discussion).

1 Comparison with column 6 shows that the experimental transition probabilities are small.

form NBS-418

(REV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 62

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. ELEM. SYM. A Yu. K. ShubnyT, D. K. Kaipov, and R.B . Begzhar.ov

J. Exptl. Theoret. Phys. (USSR) ^7, 16 (1964)

Soviet Phys. JETP 20, 11 (1965) Re

METHOD REF. NO.

Z

187 75

Resonance scattering; high temperature source 64 Sh 5 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 1 - D 1 NAI-D 122

t^(

E

l) = (4.1 db 2.0) x 10

1-0 sec for .686 MeV level.

form NBS-418

(REV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 263

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

METHOD

H. Langhoff

Phys. Rev. If2, 1033 (1967)

ELEM. SYM. A

Re

REF. NO.

75

67 La 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.G LFT 0 - 1 D 0-1 SCD-D

Table I. Results of the resonance- fluorescence experiment. The results of the present experiment, (g2 rol\/gir)o., are compared with

the results of the previous study (^2 ror,/giDN.i. Using spins and branching ratios, r,/r, from Ref. 2, the mean lifetimes ri.ni, in column

7 have been obtained.

. -El.nl (keV) £7

(keV)

(giror./giDc.

(10-= eV)

(g2r0 ri/gir) N.i (10-‘ eV) Assumed

spins r</r

Tl«wel (psec)

512 512 0.9 ± 0.3 <4 i

f -!+ 0.98 23 ±8

589 589 <8 0.99 >5

618 618 2.5 ± 0.2 2.5 ± 0.3 0.95 15.7 ±1.3

625 625 <1 ... ~0.76 >12

686 686 1.84± 0.10 1.82± 0.16 i~ !*“ 0.49 8.6 ±0.5

552 0.35± 0.05 > I* 0.10 9.2 ±1.3

480 1.52± 0.20 k 9—

1 0.40 8.5 ±1.1

773 773 170 ±12 175 ±22. §+ ~*7+ 0.99 0.25±0.02

865 865 6 ±2 <13 0.61 2.7 ±0.9

880 880 24 ±8 . . 4 r-r 0.40 0.44±0.13

form NBS-418

(REV. 7.14-44) U3COMM.OC 24 0 1 0- P4 4 PHOTONUCLEAR DATA SHEET 264

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A.M. Goryachev, G. N. Zalesnyi, S. F. Semenko , and B.A. Tulupov

Yad. Fiz. 17. *63 (1973)

Sov. J. Nucl. Phys. 17, 236 (1973)

METHOD

Re 187 75

REF. NO.

73 Go 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G.XN ABX 8- 20 C 8- 20 BF3-I 4PI

FIG. 2. Cross sections for W184’ 18<

, Os 190

, and Re 185, l87 . The cross section a

y n + 2<7r

is denoted by vertical lines whose lengths are twice

the rms errors. The crosses represent the cross sections, corrected for

multiplicity, above the threshold of the ( 7, 2n) reaction. The solid curves

are Lorentz curve approximations. For W1 ®4- ltf and Os 190 the calculated dipole transition strengths are shown.

TABLE III

W'“ R«*» w-ri

r„M«V 2.33 2 55 2,13 2 . St 2- S3 2 ^

£„ MeV 12.3 12.5 12.6 12.7 12.6 12 59 Ou mb 241 225 223 262 250 21 i r,. MeV S.l 5.4 5.7 5.2 53 5. 18 £„m.v 15.6 15.2 14.8 IS.

4

15.6 14.88 0*. mb 338 317 318 315 296 334

0.06 NZ/A. MeV-mb. 2.65 2.67 2.74 2.68 2 69 2.67

S, S,, MeV - mb 4.0 3.9 3.9 3.6 3.8 3.47 5t/ St 2.8 3.0 3.8 2.5 2.2 3,6

Note. Sj » (»/2)0|ri is the Lorentz area.

form N3S-41I

IR EV. 7-1 4-441 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 265

U.S. DEPARTMENT OF COMM E PC .1 NATIONAL BUR EAU OF STAMQARDS
.
Os

OSMIUM

Z=76

Osmium is noted for its great density, considerable hardness

(it will scratch glass), high melting point, and low

ductility. It was the first commercially successful metal

to be used in an incandescent electric bulb. The alloys of

osmium are used as bearings in fine instruments as well as for fountain pens because of the alloy's resistance to wear

and corrosion. It is used as a catalyst and the metal, when

used in a finely divided form, will cause the union of

hydrogen and oxygen to become explosive at temperatures as low as 40 or 50 degrees Celsius.

Osmium was discovered and first described by the English

amateur scientist Smithson Tennant. He noted the oxide Qs

possessed a pungent and peculiar smell and thus called the

new element osmium, from the Greek osmi , a smell.

Os

267
.

, V

'
REF‘ A. V. Mitrofanova, Yu. N. Ranyuk, and P. V.

J. Nucl. Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

METHOD

Sorokin

ELEM. SYM. A

Os

REF. NO.

76

67 Mi 1 HMG

RESULT EXCITATION SOURCE detector

REACTION ENERGY TYPE RANGE XY PE R AN GE G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 = 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

ucleus Kissionability D

Cross

section o>, m/3 Nucleus’ Fissionability 1) Cross

section <tk . nfi

Bi 0.11±0.01 7.8±0.6 Os 0.0058 +0.0005 0.37±0.04 Pb 0.050±0.004 3.4±0.3 Re 0.0056 ±0.000<> 0.35±0.04

T1 0.031 ±0,003 2,1 ±0.2 Ta 0.0045 ±0.0005 0.27±0.03

Au

Pt 0.019±0.002

0.012±0.a02-

1 ,25±0.10

0.80±0.08

Hf 0.0042 ±0.0004 0.25±0,03

f»G«v

Fig. 2. Photofission fragment yields as a function of Z'/A. The

ordinates are values of <rQ in units of cm2

. form NBS-418

(REV. 7* t 4* 64) use OMM-DC 20 0 1 0» P6

4

PHOTONUCLEAR DATA SHEET 269

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. Yu.

J.Sov

METHOD

N . Ranyuk and P. V. Sorokin

NucL. Phys. (USSR) j>, 37 (1967)

. J. Nucl. Phys. 26 (1967)

ELEM. SYM. A Z

Os

REF. NO.

76

67 Ra 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,F ABX THR- 260 C 200-260 EMUI

4PI

TABLE III

MeV

Cross section per equivalent y quantum, lO"** cm’

Os Re Ta Hf

200

220

240 260

17±2

22+2

33+3

45±4

11.8+0.8

17+1

29±t

38±2

5. 2+0.3

8.6±0.5

13.0+0.6

17.2±0.7

3.2±0.7

4.8±0.3

8.2±0.4

11.2±0.5

Fig. 4. Photofission cross sections of Os, Re, Ta, sod Hf as functions of photon energy.

FORM NBS-41S

(REV. 7-14. 04) USC OMM-OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 270

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Su Su, R.H. Sambel 1 , E.G. Muirhead, B.M. Spicer

Aust. J. Phys. 30_, 677 (1977)

HEP. EL EM. SYM.

Os 76

REF. NO.

77 Su 10 hg

'HOD

REACTION RESUL T EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, SN ABX 6-27 C 7-27 BF3-I 4PI

The absolute (>\.vn) cross section of natural osmium is extracted from brcmsstrahlung yield cuives STAT MODEL XN TO SN

measured from die lowest (;•, n) threshold of osmium isotopes up to 2S MeV in energy steps of 0-2 MeV. The VBPL method of Bramunis el al. (1972) has been used to unfold the cross section from brcmsstrahlung yield data. The results do not show evidence of significant amounts of splitting of the giant dipole resonance, as might he expected from the theoretical predictions of Sedlmayr et al. (1974), but at the same time are not inconsistent with their general features. ;

fig. 1. Comparison of the absolute (;\.\n) cross section of natural osmium from the present measurements with the curse resulting from the theoretical predictions of Sedlmayr a al. (1974). after suitable weighting for isotopic abundances. The vertical bars representing the experimental results are each equal in length to two standard

deviations obtained fioni the statistical errors on the yield points; the occasional hori- zontal bars give the eneigy resolution of neighbouring cross section points emerging from

the V Itl’I. analysis.

Correction for the neutron multiplicity effect was made using the usual statistical model approach. Cross

section shown is probably the (y,sn).

f

L'.S. GE & - : r s

- - .-y : NATIfA . . > posm N3S-418

(P e V 7.1 4- ^41

\ it ? r » " *\ 271
Su Su, R.H. Sambell , E.G. Muirhead, B.M. Spicer

Austo J. Phys. 30, 677 (1977)

REF. EL EM. SYM. A Z

METHOD

Os 76

REF. NO.

77 Su 10 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 6-27 C 6-28 BF3-I 4PI

The absolute (’/,.vn) cross section of natural osmium is extracted from bremsstrahlung yield curves measured from the lowest (y, n) threshold of osmium isotopes up to 28 MeV in energy steps of 0-2 MeV. The VBPL method of Branianis et at. (1972) has been used to unfold the cross section from bremsstrahlung yield data. The results do not show evidence of significant amounts of splitting of the giant dipole resonance, as might be expected from the theoretical predictions of Scdlmayr et ul. (1974), but at the same time are not inconsistent with their general features.

Fig. I. Comparison of the absolute (;,An| cross section of natural osmium from the present measurements with the curve resulting from the theoretical predictions of Scdlmayr ct at. (1974), after suitable weighting for isotopic abundances. The vertical bars representing the experimental results are each equal in length to two standard

deviations obtained from the statistical errors on the yield points; the occasional hori- zontal bars give the energy resolution of neighbouring cross section points emerging from

the VBPL analysis.

Correction for the neutron multiplicity effect was made using the usual statistical model approach. Cross

section shown is probably the (y,sn).

form M8S-418

(REV. 7-14.041

VJSC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 272

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAlj OF STANOAROS
' . .

273

n

Us

A=1 86
'

.

274
ref. B.L. Berman, D.D. Faul , R.A. Alvarez, P. Meyer, D.L. Olson

Phys. Rev. C19_, 1205 (1979)

Pane 1 of 3

ELEM. SYM.

0s

A

186

Z

76

METHOD REF. NO.

79 Be 4 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, IN ABX 11-20 D 11-20 BF3-I 4PI

G,2N ABX 14-20 D 14-20 BF3-I 4PI

Photoneutron cross sections, including <j-[(y,n) + (y,pn )], cr((y.2n) + (y,p2n )], and ar(y,2n), were measured for IM0s, IM0*,

190Os, and l,: Os from 7 to 30 MeV and for '“Os from 11 to 20 MeV, with a photon energy resolution of about 300 keV. The source of radiation was the monoenergetic photon beam

obtained from the annihilation in flight of fast positrons. The partial photoneutron cross sections were

determined by neutron multiplicity counting, and the average neutron energies for each multiplicity were

determined simultaneously with the cross-section data by the ring-ratio technique. Nuclear information

extracted from the data includes parameters of the giant dipole and giant quadrupole resonances, integrated

cross sections and their moments, nuclear symmetry energies, and nuclear deformation parameters and

intrinsic quadrupole moments. No fewer than eight kinds of evidence point to a sudden change of behavior between "9Os and l90Os, which could be interpreted as a phase transition from a statically deformed prolate nucleus to a y-unstable one, in general (but not detailed) agreement with the prediction of a dynamiccollective-model calculation.

NUCLEAR REACTIONS '**• 18*- '•*- 19#* 1920s ( y ,n , 2n . 3n ), £> 7-30 MeV; measured 4» neutron yield, multiplicities, average energies for monenergetic photons; <r (£r , In), <7(£r ,2n), ff(Er ,3n), GDR parameters, nuclear shape para- meters, integrated cross sections and moments, GQR parameters, nuclear phase transition.

TABLE IV. • Parameters for classical theories (given

in MeV).

Nucleus £

a m

Qf b d

e fC d

l38 0s 14.21 ±0.06 31.1 ±0.3 34.0 ± 0.1 28.9 ±0.9

l89 0s 14.19 ± 0.05 31.3 4 0.3 3-4.0 -0.1 27.3 ±0.5

IS9 Os 14.01 ±0.04 30.4 =0.2 33.6 = 0.1 27.3 ±0.4

l30 Os 13.33 ± 0.06 79.5 ± 0.3 33.1 = 0.1 26.6 ±0.7

192 Os 13.79 ± 0.04 79.6 ±0.2 33.1 40.1 26.3 ±0.7

1 Mean energy of the giant resonance, defined as £„

= (£„(1) * 2 £ml2)]/3, except for leOs, for which E„

= [Em{l)*Em{2)]/2.

b Hydrodynamic parameter, defined by £, - qa" i/3

. c Collective parameter, defined by £„ JA~' *. d Nuclear symmetry energy', computed from Eq. (2).

TABLE V. Nuclear shone parameters.

Nucleus i) b « e (b)

•*«Os 0.95 ±0.27 1.188 ±0.016 0.30b 0 0.11 0.194 ±0.016 5.76 ±0.49

188 0s 0.44 ±0.08 1.177 ± 0.011 0.340 i>0021 0.183 ±0.011 5.49 ±0.33

189 Os 0.51 ±0.07 1.173 ±0.008 0 33> i u.uii 0.179 ±0.008 5.38 ± 0.24

,9<l Os 0.32 ± 0.10 1.149 ± 0.015 0 ."2 i • 1 1 j

-

1 0 153 ±0.015 4.65 ± 0.46

l «Os 0.30 ±0.11 1.145 ± 0.016 0.2'.! n 1131 0. 150 ± 0.016 4.55 ± 0.50

1 Area ratio, defined as ofl Ujr(l)/cr„(2)r(2).

b Deformation parameter, computed from / ,

I • o • • 1 1 0.039.

c Nuclear eccentricity, computed from c ( n* - 1

• ’

d Deformation parameter, defined as jvt/'h' ••

* Intrinsic quadrupole moment, computed from hq •, , h H,. taken to be 1.26 fm.

form N3S-418

(R GV. 7.1 4-841 use omm-n as-o c

4 8 12 16 20 24 28 32

Photon Energy (MeV) FIG. 8. Running sums of integrated photoneutron cross sections and their moments for l86Os: (a) cr i nt = J'odEr for <7 (y, it, ) (top), cr (Y , In) (middle), and

<r (Y , 2n 1 (bottom); (b) cr., = J

cr Ey

‘ ldEr ; (c) <r. 2 = J

CT Ey~ ZdEy .

(over)

PHOTONUCLEAR DATA SHEET 275

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
24 22

300

240

180

120

60

0

(0

hi

! '."i

1 ,.J T (7,n) T (Y,2n)

T (7.3n)

12 16 20 24 Photon Energy (MeV)

28 32

§ I

»

!

ri I

FIG. 2. Photoneutron cross sections for 1860s: (a) total photoneutron cross section <r(y ,n t

) = a [(y , In) + (y , 2n)|, together with a two-component Lorentz-curve

fit to the data (solid line); (b) single-photoneutron cross

section cr (Y , In) = <r [(y , n)+(y,pn)\; (c) double-photoneutron cross section a (Y ,2n). 1 ICj - 14 - Cross-section differences above the GDR;

the two-component Lorentz-curve fits to <j (y ,n ,) shown

in part (a) of Figs. 3-6 were subtracted from the data

points to give these differences, which were in turn

fitted with the single-component Lorentz curves shown

here as solid lines: (a) for 138Os; (b) for mOs- (c) for 1MOs; (d) for ‘«Os. TABLE III. Parameters of Lorentz-curve fits to the giant dipole resonance. Lorentz. parameters defined by Eq. i); the fitting interval for all cases is 10.4 to 18.8 \ie v

Nucleus FA1) (MeV) ‘"All 1

1 mb) fi Li i MeV) £A2) ( Me V) r_(2) J

i mb) r<2) ( MeV)

1 c Os

! Os ‘"Os

ICO

182'Os Os

13.03 j. 0 09

12.31 = 0.05

12.68 xO. 04 12.68 xU. 07

12.68 x 0.06

308x21

260 x 18 268 x 14 206 x 29 206 x 34

-J.lo 2.76 : 2.71 . 2.60 -0.24 0.13 0.10

0.21 2.49 x 0.23

13.26 xO.0.9 14.88 x 0.07

14.68 x 0.05

14.40 x0. 09

14.35 x 0.12

302 x 33 390 x 14 395 x ll 401 x 34 389 x26

5.38 x o . 2

1

4.19 x 0.13

3.62 x0.10 4.16x0.11

4.41 =0.13

0.58

0.96

0.75

1.19 0.95

1 Lncertainties for <rn given here are relative. The absolute uncertainties are 7 7 (10% for |,6 Os).

o t> vs n

rj ri n ri

M C*l C*I CU

A ,

' C

~ : i =6

rs M XJ -j

- 1

I M . tQ ' I >i C i

!

2? il x I o o o ©

CO M M <M !

d d d d

CO CO M -M I

|

I

75 1 ? I 2 I 2 I £ !

zs o a

if 5 d £ . . •- > o o

3* C =£ C C

s c - o o

O ~ 1* i- ^ its itl

rt X C “3 U

Page 2 of 3

TABLE IX. Integrated cross sections , <7 jnl (y,;i:) = j crty.jcidEy, integrated from threshold to £ymax. Uncertainties are discussed in Sec. II of the text.

E y max (MeV)

O’ ini lY, 1«) ff inilY.2») ini (Y. 3)0 <7 im (Y. 2«) 0"int (Y.«l) |-7r[crm(l) HI) xcrm(2) T(2) 1 J

Nucleus (MeV b) (Me Vb) (Me Vb) ‘7,„t (Y, V 0.06.VZ/A 0.06HZ/

A

13*Os 19.67 h 2.04 0.46 ... 0.19 0.93 x 0.09 1.15±0.12

‘ s, Os 30.42 2.62 0.33 0.12 0.24 1.33x0.09 1.36 = 0.08

lS9Os 29.92 2.13 1.00 0.21 0.30 1.23 ± 0.09 1.24 x 0.06

110 Os 30.42 2.01 1.08 0.14 0.33 1.18 x0 . 08 1.27x0.10

1,2 Os 29.92 1.92 1T20 0.19 0.36 1.20 x0. 08 1.27=0.11

1 Uncertainties listed here are retative; to obtain the absolute uncertainty a systematic uncertainty of 7" (10% for

1 c Os) must be folded into the values for <J n. h Care must be used comparing values for ,,<6 Os with the rest because £vm:x is so much different. 07ft
ref. B.L. Berman, D.D. Faul , R.A. Alvarez, P. Meyer, O.L. Olson

Phys. Rev. Cl£, 1205 (1979)

Page 3 of 3

ELEM. SYM.

Os 186 76

METHOD REF. NO.

79 Be 4 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, IN ABX o i C\J r— D 11-20 BF3-I 4PI

G,2N ABX 14-20 D 14-20 BF3-I 4PI

TABLE X. Integrated cross-section moments, <7_, = J'<J(y,n t )Ey~'dE y andcr_2 ^j'Ay, n t )E

7 ~ ldE y

, integrated from threshold to E ymlx .

0.05175.4 5 3

ff -i a.,4'^

3

O'.

2

T-2 <J-lK O'--. Nucleus (mb) (mb) ImbMeV1 ) 0.00225A 3 / 3 0.051754 s /-1 (MeV)

iS60s» 179 0.168 13.2 0.97 1.22 23.8 ±2.4

138 0s 239 0.222 16.7 1.20 1.45 19.1 =1.3

1890s 228 0.210 16.7 1.19 1.41 19.3=1.4

190 Os 220 0.202 15.8 1.12 1.30 20.6=1.4

l9J Os 224 0.203 16.0 1.12 1.31 20.6 = 1.4

1 Care must be used in comparing values for li6 Os with the rest because E.rmxx is so much

different.

TABLE XII. Characteristics of the giant quadrupole resonance. The fitting interval used for the Lorentz-curve fits

is 20-23 MeV.

Nucleus

E, (Me VI (MeV) ( Me V) E,A1/3 (MeV)( 1 .G0£ m)

15

( Me VI W.r.( MeV' mb) (Sq /Si

) c o_2 texpt) d (mb MeV" 1)

cr_

2

( thy)

15

( mb MeV" 1

)

188 Os 22.3 = 0.2 76 = 6 3. 3 = 0.

6

131 22.7 453 = 107 0.12 0.37 0.49 . l89 Os 23.0 = 0.3 51=5 5.0 = 1.0 132 22.4 407 =121 0.12 0.77 0.45

lJ°Os 23.3 =0 3 32=4 4.0 =0.9 137 22.1 202 = 71 0.06 0.36 0.47

ir! Os 23.9 = 0 1 65 *4 2.3 = 0.4 138 22.1 288 = 59 0.03 0.50 0.47

1 Relative uncertainties.

^ Theoretical prediction of Ref. -12 isee text). £„ is the GDR energy from Table IV.

c S„ is the quadrupole strength defined as Sd

is the dipole strength defined as

~

[omi 1 ) n 1) T(2) 1. d Computed as 8,

/£J

3

. 4 Computed from Eq. 1 12 )

.

form N3S-418

1R EV. 7-1 4-94) USC OMM-N BS-0 C

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 277
278
Os

.

Os

279

A=1 88
280
ref. B.L. Berman, D Phys. Rev. C19

,D. Faul , R.A. A1 varez,

, 1205 (1979)

P. Meyer, D.L. Olson

Page 1 of 3

ELEM. SYM.

0s

A

188

Z

76

METHOD REF. NO. 79 Be 4 hg

EXCITATION SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE range

ANGLE

G, IN ABX 8-30 D 8-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 21-30 D 21-30 BF3-I 4PI

Photoneutron cross sections, including cr[(y.n) + (y.pn )], cr[(y,2n) + (y,p2n)], and cr(y,3n), were measured for ‘"Os, “’Os,

|,0Os, and |,i: Os from 7 to 30 MeV and for “6 Os from 11 to 20 MeV, with a photon energy resolution of about 300 keV. The source of radiation was the monoenergctic photon beam

obtained from the annihilation in flight of fast positrons. The partial photoneutron cross sections were

determined by neutron multiplicity counting, and the average neutron energies for each multiplicity were

determined simultaneously with the cross-section data by the ring-ratio technique. Nuclear information

extracted from the data includes parameters of the giant dipole and giant quadrupole resonances, integrated cross sections and their moments, nuclear symmetry energies, and nuclear deformation parameters and

intrinsic quadrupole moments. No fewer than eight kinds of evidence point to a sudden change of behavior between “’Os and l ’°Os. which could be interpreted as a phase transition from a statically deformed prolate nucleus to a y-unstable one. in general (but not detailed) agreement with the prediction of a dynamiccollective-model calculation.

NUCLEAR REACTIONS ,,s« l88’ ,3i IMOs(y ,n , 2n, 3n). £T

=. 7-30 MeV; measured 4tr neutron yield, multiplicities, averageenergies for monenergetic photons; cr (£r , In), u (

E

r , In)

,

c(£r ,3.t), GDR parameters, nuclear shape para- meters, integrated cross sections and moments, GQR parameters, nuclear phase transition.

Photon Energy (MeV)

FIG. 9. Running sums of integrated cross sections for

,88Os: (a) o- lnt for tr (y ,n t ) (top), <7 (y . 1 n) (next to top), a(y,2 n) (next to bottom), andcr(Y,:3*> (bottom); (b)

<r. ,; (c) a. 2

- FIG. 7. Total photoneutron cross sections, together

with single-component Lorentz-curve fits to the data:

(a) for 188Os; (b) for 19<1 Os.

form N3S-418

(R EV. 7« 1 4-64) use OMM-N BS-OC

( over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 281
0 j4

*<7.n) *(7.2n) (7.3n) 8 12 16 20 24 28 32

16 20 24 28 32

Phnron Energy (MeV)

Photon Energy (MeV)

FIG. 3. Photoneutron cross sections for I88 Os: (a) a(y ,n t ), with a two-component Lorentz-curve fit; (b) a(y,ln); (c) cr(y,2 n); (d) triple- photoneutron cross

section cr (y , 3 n).

FIG. 14. Cross-section differences above the GDR;

the two-component Lorentz-curve fits to er(y ,n t

) shown

in part (a) of Figs. 3-6 were subtracted from the data

points to irive these differences, which were in turn

fitted with the single-component Lorentz curves shown

here as solid lines: (a) for I38 Os; (bi for l33Os; (e) for

130 Os; (d> for 1?-Os. TABLE III. Parameters of Lorentz-curve fits to the giant dipole resonance. Lorentz parameters defined by Eq.

the fitting interval for all cases is 10.7 to 18.6 MeV

i! o

rs 71

3 O S 2

n 71 71 m

77 77. 71 71 o o o o o o o o

77 71 71 71

O -r 1 d d o’ d

Page

Nucleus £„' li i MeV) T,

n

i I)

J 'mhi l il) ( MeV) £,„l2) (MeV) •t r

\ 2)

1

( mhi Ft 2 ) ( Me Vi x

:

1 8 Os 13.03 M) 09 308 x 21 3.13 £0.24 13.26 £ 0.09 302 £ 23 3.3S £0.21 0.68

1 us 12.7 1 £ 0.0.7 260 £ 18 2.76 £0.13 14.88 £0.07 390 £ 14 4 . 1 9 £ 0 . 13 0.96

1

' ! Os 12.68 £ 0.04 268 x 14 2.71 £0.10 14.66 £0.05 395 £ 11 3.62 £0.10 0.73

10 Os 12.68 ± 0.07 206 £29 2.60 £0.21 14.40 £0.09 401 £24 4.16 £0.11 1.19

l92 0s 12.68 =0.06 206 £34 2.49 £=0.23 14.35 £0.12 389 £26 4.41 =0.13 0.95

1 Uncertainties for <r n given here are relative. The absolute uncertainties are 7'T. ilO'o for l!6 Os).

TABLE V. Nuclear shape parameters.

Nucleus Ra 1 n

b €

c V0 e lb)

186 Os 0.95 ±0.27 1.188 ±0.016 0.366 ±0.031 0.194 ±0.016 5.76 ±0.49

lit3 Os 0.44 ±0.08 1.177 ± 0.011 0.346 ±0.021 0.183 ±0.011 5.49 ±0.33

185Os 0.51 ±0.07 1.173 ± 0.008 0.338 ±0.015 0.179 ±0.008 5.38 ±0.24

1M Os 0.32 ±0.10 1.149 ± 0.015 0.292 ±0.029 0.155 ± 0.015 4.65 ± 0.46

,l2 Os 0.30 ±0.11 1.145 ±0.016 0.233 ±0.031 0.150 ±0.016 4.55 ±0.50

1 Area ratio, defined as <7?

( 1 ) T( l)/<7mi2) F(2).

s Deformation parameter, computed from £m(2)/£ml 1) - O.Olli; 0.089.

c Nuclear eccentricity, computed from ± ~ ( h

2 — 1) p

- /z

, d Deformation parameter, defined as T' 7r /f>) 1/ ‘ e . e Intrinsic quadrupole moment, computed from Eq. (8), with H 0 taken to be 1.26 fm.

Of 3
REF. B.L. Berman, D.D. Faul , R.A. Alvarez, P. Meyer, D.L. Olson

Phys. Rev. CT9, 1205 (1979)

Page 3 of 3

ELEM. SYM.

Os

METHOD

188

REF. NO.

79 Be 4

76

hg

REACTION RESUL T EXCITATION SOURCE OETECTOR

ENERGY TYPE RANGE TYPE RANGE

ANGLE

G, IN ABX 8-30 D 8-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 21-30 0 21-30 BF3-I 4PI

TABLE IV. Parameters for classical theories (given

in MeV).

Nucleus E

a c'm a

b Kd

186 0s 14.21 =0.06 81.1 =0.3 34.0 = 0.1 28.9=0.9

183 0s 14.19 = 0.05 31.3 = 0.3 34.0 = 0.1 27.3=0.5

189 0s 14.01 =0.04 30.4 =0.2 33.6 = 0.1 27.3 =0.4

190 Os 13.83 = 0.06 79.5 = 0.3 33.1 = 0.1 26.6 = 0.7

192 Os 13.79 = 0.04 79.6=0.2 33.1 ±0.1 26.3 =0.7

1 Mean energy of the giant resonance, defined as Em

- (£„(1) - 2 £„,(2)l/3, except for ‘‘^Os, for which Em

= [£„(ll •*-£m(2)J/2.

b Hydrodynamic parameter, defined by Em = ceA~ l/3

. c Collective parameter, defined by £„=dA" 1/s

. d Nuclear symmetry energy, computed from Eq. (2).

TABLE IX. Integrated cross sections, <r inl \y,x) = j my,x)UEy

, integrated from threshold to £ vin:, v. Incertainties are discussed in Sec. II of the text.

*

Nucleus

*-• F

) max (Me V0

<7int<Y. 1")

( Me V b)

<7 intO'. 2«) (Me Vb)

o-, m (y,3«)

( MeVbt

Cimty. 2«)

intiy, "t)

Omt CX , Ht ) 0.06.VZ/A

i-it[o-m(i)r(i) -o-m(2)n2)i 4

0.0C.VZ/A

'°®Os io.67 b 2.04 0.46. 0.19 0.93 = 0.09 1.15 = 0.12 IMOs 30.42 2.62 0.S8 0.12 0.24 1.33 = 0.09 1.36 =0.08

1 Os 29.92 2.13 1.00 0.21 0.30 1.23 = 0.09 1.24 =0.06

1 "Os 30.42 2,01 1.08 0.14 0 . Jo 1.18 =0.03 1.27 = 0.10

l

'2 Os 29.92 1.92 1.20 0.19 0.36 1.20 = 0.08 1.2,7 =0.11

Incertainties listed here are relative; to obtain the absolute uncertainty a systematic uncertainty of T ' 7. 1 1 0

' 7 for

b Os> must be folded into the values for <t m. Care must be used comparing values for 1 h Os with the rest because £., max is so much different.

1 uj

CO

co o

o 3

o 2 — ° 3 *g

w U

-l Z c C < to

v n t •, t

N H —I r* —

i

O —

^1 C- l- 00 © n (o (o in c

TABLE XII. Characteristics of the giant quadrupole resonance. The fitting interval used for the Lorentz-curve fits

is 20-28 MeV.

Nucleus

E,

( Me V) i MeV)

r,

( Me V) (MeV)

tl.G0E„,)

b

( Me VI l Me V mb) (S,/S„) c u_2 (expt) d imb MeV)

o-.jithy) (mb MeV' 1 )

188 Os 22.8 = 0.2 76 = 6 3. 8 = 0.

6

131 22.7 453= 107 0.12 0.87 0.49

I690s 23.0 = 0.3 51=5 5. 0 = 1.0 132 22.4 407 = 121 0.12 0.77 0.45

190 Os 23.3 =0.3 32 =4 4.0 =0.9 137 22 1 202= 71 0.06 0.36 0.47

in Os 23.9 = 0.1 65 =4 2.3 = 0.4 138 22.1 238 = 59 0.08 0.50 0.47

J Relative uncertainties.

h Theoretical prediction of Ref. 42 isee text). E„ is the GDI? energy from Table IV.

c S w is the quadrupole strength defined as is the dipole strength defined as f tr [tr ml 1 ) T( 1 )

*• ir mi2) H2) ]. d Computed as 8,/E,2

. e Computed from Eq. (12).

form N3S-418

(R EV. 7-1 4-S41 USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 283

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OP STanCARCS
.

.

.

y
-

Os

A-189

•

.

'

r

.

.

.

285

A=1 89

ref B.L. Berman, D.D. Fau]

Phys. Rev. dl£, 1205 (

. R.A. Alvarez, P. 1979)

Meyer, D.L. Olson ELEM. SYM. A Z

Page 1 of 3 Os 189 76

METHOD REF. NO. 79 Be 4 hg

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE REACTION RESULT TYPE RAN GE type range

G, IN ABX 6-30 D 6-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 19-30 D 19-30 BF3-I 4PI

Photoneutron cross sections, including cr((y,n) 4- (y.pn )], cr[(y.2n) + {y,pln)\, and <r(y,3n), were measured for '"Os, "’Os,

l ’°Os. and l,: Os from 7 to 30 MeV and for "‘Os from 11 to 20 MeV, with a photon energy resolution of about 300 keV. The source of radiation was the monoenergetic photon beam

obtained from the annihilation in flight of fast positrons. The partial photoneutron cross sections were

determined by neutron multiplicity counting, and the average neutron energies for each multiplicity were

determined simultaneously with the cross-section data by the ring-ratio technique. Nuclear information

extracted from the data includes parameters of the giant dipole and giant quadrupole resonances, integrated

cross sections and their moments, nuclear symmetry energies, and nuclear deformation parameters and

intrinsic quadrupole moments. No fewer than eight kinds of evidence point to a sudden change of behavior between "’Os and : “°Os, which could be interpreted as a phase transition from a statically deformed prolate nucleus to a -/-unstable one, in general (but not detailed) agreement with the prediction of a dynamiccollective-model calculation.

NUCLEAR REACTIONS 188> 1,s* 1,9> :S0< 1KOs(y ,n , 2n . 3n). £, = 7-30 MeV; measured 4tr neutron yield, multiplicities, average energies for monenergetic photons; <r (£T , In), <7(ET ,2n), <7 (

£

r , 3n), GDR parameters, nuclear shape para- meters, integrated cross sections and moments, GQR parameters, nuclear phase transition.

TABLE IV. Parameters for classical theories tgiven

in MeV).

Nucleus a* £d

136 Os 14.21 =0.06 81.1 =0.3 34.0 = 0.1 28.9=0.9

ls8 Os 14.19 = 0.05 31.3 = 0.3 34.0 = 0.1 27.3=0.5

ie9 Os H.01 =0.04 30.4 =0.2 33.6 = 0.1 27.3 = 0.4

l30 Os 13.33 =0.06 79.3 = 0.3 33.1 =0.1 26.6 = 0.7

l32 Os 13.79 = 0.04 79.6 =0.2 33.1 =0.1 26.8 =0.7

1 Mean energy of the gianc resonance, defined as £

„

= [£„,U) -2£„(2)l/3, except for ‘^Os, for which £„

= (£„( 1 ) £,,( 2 ) 1 /2 . s Hydrodynamic parameter, defined by Em = aA~' /3

. c Collective parameter, defined by £„=3A' I/6

. d Nuclear symmetry energy, computed from Eq. (2).

TABLE V. Nuclear shape parameters.

Nucleus 7* e

c <V (b)

l88 0s 0.95 = 0.27 1.188 =0.016 0.3G6 = 0.031 0.194 ±0.016 5.76 = 0.49

1,8 Os 0.44 =0.03 1.177 = 0.011 0.346 = 0.021 0.133 = 0.011 5.49 =0.33

183 Os 0.51 = 0.07 1.173 = 0.003 0.338 =0.015 0.179 = 0.008 5.38 = 0.24

130 Os 0.32 = 0.10 1.149 = 0.015 0.292 =0.029 0.155 = 0.015 4.65 = 0.46

192 Os 0.30 =0.11 1.145 =0.016 0.233 =0.031 0.150 = 0.016 4.55=0.50

* Area ratio, defined as om(L)r( 1 )/ct^i2) T(2). ’’Deformation parameter, computed from £^(2)/£ m( 1) -- O.Olli; 0.089.

c Nuclear eccentricity, computed from t l h

2 — 1)

d Deformation parameter, defined as jr~/5) 1/2t . e Intrinsic quadrupole moment, computed from Eq. 1

8

) , with H0 taken to be 1.26 fm.

8 12 16 20 24 28 32

8 12 16 20 24 28 32 Photon Energy (MeV)

FIC. 10. Running sums of integrated cross sections

for 185Os: (a) cr lnt ; (b) a. t ; (c) a. 2

.

jover)

form N3S-418

.'REV. 7-14- 64) USC OMM-N BS-O C PHOTONUCLEAR DATA SHEET 287

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
600

480

300

240

180

120

60

0

60

48

36

24

12

0

20

/\

189,Os

(cl

'V,

T(7.nl T(7.2n) :(7.3n) 1 TTT—

(d)

Mr.n) T (7.2nl '( -y. 3n > 12 16 20 24 Photon Energy (MeV)

28

1 50 r 28 32

120 r 189,Os ,

1201

[ 90 r

L 60 >

30 r

192Os

: i iJftv ! ,

: i ;

1

f

1

1

’ 0 hi i!» ei.i^irTirT

’ ' f-vt

;

20 24 28 Photon Energy (MeV)

32

FIG. 4. Photoneutron cross sections for 189Os: (a) <r(y t n t

) 9 with a two-component Lorentz-curve fit; (b)

(j (y f ln); (c) a (y , 2 n ) ; (d) <7 {y , 3 n )

.

33

Pane 2 of 3

-5

C4

Cl r* b

_

r-4 7^ <=>. O

1 ”

i te |-i~

i

00300:1 —

~

jn 00000

i s

FIG. 14. Cross-section differences above the GDR;

the two-component Lorentz-curve fits to <j(y ,n

t

) shown

in part (a) of Figs. 3— G were subtracted from the data

points to give these differences, which were in turn

fitted with the single-component Lorentz curves shown

here as solid lines: (a) for l39Os; (b) for 131Os; (c) for

IMOs; (d) tor '-Os. TABLE III. Parameters of Loren:/-eurve fits to the giant uipole resonance. Lorentz parameters detined by Eq.

ic fitting interval for all cases is 10.4 to 18.8 Met’

x

P SI

—niZ) 72 X c : W 1

' 2 SI < n

© o o o o

C l

o o o o

o o — — —

-1 -i -1 ri — 2-5 ~ - C

c- ri ?) Cl -1 I

1 3 — O T O'

« % i X X. X X. X

Nucleus £_' li ' Me Vi r 1 1 1 •*

i mb) ft H ' MeV) 1 2 ' i MeV) r_tlt ) *

i mhi f i 2 )

i MeV)

1

' e Os 13.03 4 0 09 308 a 21 3.13 x 0.24 15.26 =0.09 302 = 23 3.38 x 0.21 0.8 8

i Os 12.81 i 0.03 260 x 18 2.76 = 0.13 14.8.8 x 0.07 390 i 14 4.19 x 0.13 0.96

l; "Os 12.08 -0.04 268 i 14 2.71 i0. 10 14.68 x 0.05 395 x u 3.62 x o. 10 0.75

1:0 Os 12.68 * 0.07 206 x 29 2.60 xo. 21 14.40 x0.09 401 x 24 4.16 x0. 11 1.19

1?2 0s 12.68 =0.06 206x34 2.49 to 23 14.33 =0.12 389 x 26 4.41 x 0.13 0.95

J Lncertainties for given here are relative. The absolute uncertainties are T I ilO v for '^Os). TABLE VI. Values for fi(E2.0 r —2') (in units of b

: ).

Nucleus Present experiment 4 u-mesic x rays

h Coulomb excitation c Theory J Theory

'Os 3.30 x 0.56 3.15 x 0.03 3.08 =0.21 2.96 3 05

'Os 3.00 x 0.36 2.84 =0.03 2.73 -0.12 2.72 2.75

'Os 2.13x0.43 2.48 x 0.02 2.40x0.11 2.59 2.34

: Os 2.06 x0. 46 2.10 x0. 02 2.02 x 0.09 2.56 2.34

1 Computed from Eq. (9), using the values for from Table V'. h From Ref. 26.

c Weighted average from Refs. 27 and 28.

d From Ref. 3.

e From Ref. 6.

288
ref. B.L. Berman, D.D. Faul , B.A. Alvarez, P. Meyer, D.L. Olson

Phys. Rev. Cl

9

, 1205 (1979)

Page 3 of 3

ELEM. SYM.

Os 189 76

79 Be 4 hg SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE

ANGLE

G,1N ABX 6-30 D 6-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 19-30 D 19-30 BF3-I 4PI

TABLE X. Integrated cross-section moments, JX, - J <ny,>i t )Ey~ ldEy andcr_2 =j<7(y , n t >Ey~z<lE

y

, integrated from threshold to E ynxx .

0. 051754 V3

Nucleus

*-l (mb) (mb)

CT_ 0 (mb MeV-1

)

(7 _i 0.00225 A 5 /’

<t-zK

0.051 754 5 f

3

CJ_2 (MeV)

‘SCOs 1 179 0.168 13.2 0.97 1.22 23.8 ±2.4

• 13! Os 239 0.222 16.7 1.20 1.45 19.1 =1.3

1890s 228 0.210 16.7 1.19 1.41 19.3 = 1.4

190 Os 220 0.202 15.8 1.12 1.30 20.6 ±1.4

l92 Os 224 0.203 16.0 1.12 1.31 20.6±1.4

4 Care must be used in comparing values for 1 e Os with the rest because E.. mx is so much

different.

TABLE XII. Characteristics of the giant quadrupole resonance. The fitting interval used for the Lorentz-curve fits

is 20-28 MeV.

Nucleus ( Me V) (MeV)

L

( Me 13

£,-4

1/3 (MeV)

(1.60£„)

b

( Me V) WoL

(MeV mb) ( vv c

i/_

2 (expt) d (mb Me V" 1 )

<T.

2 (thy)

e

( mb Me V' -1

)

‘""Os 22.8 = 0.2 76 -t 6 3. 8 = 0.

6

131 22.7 453 = 107 0.12 0.37 0.49

ll9 Os 23.0 = 0.3 51=5 5.0 = 1.0 132 22.4 407 = 121 0.12 0.77 0.45

1 '"Os 23.8 =0.3 32 =4 4.0 =0.0 137 22.1 202 = 71 0.06 0.36 0.47 "3 Os 23.9 = 0 1 65 =4 2.8 = 0.4 138 22.1 288 = 59 0.03 0.50 0.47

J Relative uncertainties.

n Theoretical prediction of Ref. 42 isee text). E

is the CDR energy from Table IV.

c S 1 is the quadrupole strength defined as f is the dipole strength defined as 4* :|j„il)ri 1) - '/„t2) T(2) I. J Computed as \/Ej~.

4 Computed from Lq '12).

form N3S-418

IR EV. 7-1 4-64) use OMM-N BS-OC PHOTONUCLEAR DATA SHEET 289

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
290
• — -

Os

A=190

A

Os

A=1 90

291
292
A.M. Goryachev, G.N. Zalesnyi, S.F. Semenkd, and B.A. Tulupov

Yad. FIz. 17, 463 (1973)

Sov. J. Nucl. Phys. 17, 236 (1973)

REF. EL EM. SYM. A Z

METHOO

Os 190 76

REF. NO.

73 Go 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G ,XN ABX 8- 20 C 8- 20 BF3-I 4PI

FIG. 2. Cross sections for W1M- 1M , Os190

, and Re 183- l87 . The cross

section o

y n + 2ay< 2n is denoted by vertical lines whose lengths are twice

the rms errors. The crosses represent the cross sections, corrected for

multiplicity, above the threshold of the (7, 2n) reaction. The solid curves

are Lorentz curve approximations. For W1M- IS* and Os 190 the calculated

dipole transition strengths are shown.

form N8S-41I

IP EV . 7-1 4- 641 USCOMM-OC Z80I0-PS4

TABLE III

o*‘» Re* Re~

r„ M«v 2.33 2.55 2,13 2 . S| 2. 83 2 *>o £„ M»V 12.3 12 .

s

12.6 12.7 12.6 12.59

241 225 223 262 250 211. ru Mtv S.l 5.4 5.7 5.2 S3 5.18 £t,MeV 15.6 15.2 14 8 15.4 15.6 14 83 338 317 318 315 296 334

0.06 NZ/A. MeV-mb 2.65 2.67 2.74 2.68 2 69 2.67

S, S,, MeV-mb 4.0 3.9 3.9 3.6 3.8 3.47 St/ s% 2.8 3.0 3.8 2.5 2.2 3,6

Note. Sj = (ir/2)<7|fj is the Lorentz area.

U.S. DEPARTMENT OF COMMJRC;

NATIONAL BUREAU OF S TAMO SR OS PHOTONUCLEAR DATA SHEET 293
REF. B.L. Berman, D.D. Faul , R.A. Alvarez, P. Meyer, D.l. Olson

Phys. Rev. C19_, 1205 (1979)

Page 1 of 3

EL EM. SYM.

Os 190 76

METHOD REF. NO.

79 Be 4 hg

SOURCE DETECTOR

REACTION RESULT ANGLE ENERGY TYPE range TYPE RANGE

G, IN ABX 8-30 D 8-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 20-30 0 20-30 BF3-I 4PI

Photoneutron cross sections, including cr((y,/i) 4- (y,pn)], <r[(y,ln) + (y,p2n )], and cr(y,3n 1, were measured for

l!, Os,"'‘

1 Os,

|l,0Os, and 1,; Os from 7 to 30 MeV and for

l56Os from 11 to 20 MeV, with a photon energy resolution of about 300 keV The source of radiation was the monoenergetic photon beam

obtained from the annihilation in flight of fast positrons. The partial photoneutron cross sections were

determined by neutron multiplicity counting, and the average neutron energies for each multiplicity were

determined simultaneously with the cross-section data by the ring-ratio technique. Nuclear information

extracted from the data includes parameters of the giant dipole and giant quadrupole resonances, integrated

cross sections and their moments, nuclear symmetry energies, and nuclear deformation parameters and

intrinsic quadrupole moments. No fewer than eight kinds of evidence point to a sudden change of behavior between "’Os and lw

Os, which could be interpreted as a phase transition from a statically deformed prolate nucleus to a y-unstable one, in general (but not detailed) agreement with the prediction of a dynamiccollective-model calculation.

NUCLEAR REACTIONS '86. in. > 83, iso. iM0s( y , 2 n , 3n), Ey = 7-30 MeV; measured 4ir neutron yield, multiplicities, averngeenergies for monenergetic photons; a (Er , In), u(Er ,2n), <r(Er ,2n), GDR parameters, nuclear shape para- meters, integrated cross sections and moments, GQR parameters, nuclear phase transition.

Photon Energy (MeV)

4 3 12 16 20 24 28 32 600 i i

36 1

24 *

'2 I

I I

My.nl ’ (y.2nl (y.3nl 28 32 Photon Energy (MeV)

FIG. 3. Photoneutron cross sections for 190Os: (a)

cr (y with a two-component Lorentz-curve fit; (b)

cr (y , In); (c) <7 (y , 2n); (d) tj (y , 3n).

FIG. 7. Total photoneutron cross sections, together

with single-component Lorentz-curve fits to the data:

(a) for 188Os; (b) for 190 Os.

(over)

form N3S-418

(R EV. 7-1 4-64) USC OMM-N BS-DC PHOTONUCLEAR DATA SHEET 294

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
16 20 24 28 32

ISO.

Photon Energy (MeV)

FIG. 14. Cross-section differences above the GDR;

the two-component Lorentz-curve fits to c (y ,n

t

) shown

in part (a) of Figs. 3-6 were subtracted from the data

points to give these differences, which were in turn

fitted with the single-component Lorentz curves shown

here as solid lines: (a) for l33Os; (b) for 135Os; (c) for

150 Os; (d) for lr,2 Os.

FIG. 11. Running sums of integrated cross sections

for 110 Os : (a) a lnt ; (b) o.,; (c) a. 2

.

x n t> —

•

© o’ © — o’

o o o' o’ o’ I I

C7 -r n’ -r *r i

ili.

_ I > \ i i

ri

| ?i 7? I s

o o o o o

I

; ~

— 1 o o o o o — o lrf m m*

2 .2

J

, - 3 i

!

's 2 I

| il\\ > I S »

~n o x o o

o o o o o

© o o o o

-4 - H -H - I j CC — X X V? , O X O O © I r: ci ci ci ci :

£ <0 73 w

j

TABLE IV. Parameters for classical theories (given

in MeV’). TABLE V. Nuclear shape parameters.

Nucleus E

a ^ m

Qf

53 P

c K d Nucleus 7

b e

c P,

d V0 e (b)

tss Os 14.21 =0.06 81.1 =0.3 34.0 ± 0.1 28.9 ±0.9 136 Os 0.95 ±0.27 1.138 =0.016 0.366 = 0.031 0.194 ±0.016 5.76 = 0.49

ls8 Os 14.19 = 0.05 31.3 = 0.3 34.0 = 0.1 27.3=0.5 1S3 0s 0.44 ±0.03 1.177 = 0.011 0.346 = 0.021 0.183 = 0.011 5.49 = 0.33

1S3 0s 14.01 ±0.04 30.4 =0.2 33.6 ± 0.1 27.3 =0.4 0.51 ±0.07 1.173 = 0.008 0.338 ±0.015 0.179 = 0.008 5.38 ±0.24

130 Os 13.33 ±0.06 79.5 = 0.3 33.1 ±0.1 26.6 = 0.7 130 Os 0.32 = 0.10 1.149 = 0.015 0.292 ±0.029 0.155 ±0.015 4.65 = 0.46

132 Os 13.79 = 0.04 79.6 = 0.2 33.1 ±0.1 26.8=0.7 1:12 Os 0.30 ±0.11 1.145 ±0.016 0.233 ±0.031 0.130 = 0.016 4.55 x 0.50

1 Mean energy of the giant resonance, defined as Em

= (£m(l) ^2£/n(2)l/3, except for lcS 0s, for which Em = lEJl)+En{2)]/2.

b Hydrodynamic parameter, defined by Em

- ctA~ in. c Collective parameter, defined by Em = pA~ l/e

. d Nuclear symmetry energy, computed from Eq. (2).

i Area ratio, defined as cr ml U F( l)/crm

:2) r(2).

b Deformation parameter, computed from £mi2)/E„,(l) - 0.911?) -0.089.

c Nuclear eccentricity, computed from ± - ( tj 2 — 1 ) _2/' 3

. d Deformation parameter, defined as •317t/5) 1/2

€.

e Intrinsic quadrupole moment, computed from Eq. .8), with R0 taken to be 1.26 fm.

Page 2 of 3

295
*ef. B.L, Berman, D.D. Faul ELEM. SYM. , R.A„ Alvarez, P. Meyer, D.L. Olson

Phys. Rev. 09, 1205 (1979)

Pace 3 of 3 Qs 190 76

79 Be 4 hg

EXCITATION ENERGY

SOURCE DETECTOR

REACTION RESUL T TYPE RANGE TYPE RANGE ANGLE

G, IN ABX 8-30 D 8-30 BF3-I 4PI

G,2N ABX 14-30 D 14-30 BF3-I 4PI

G,3N ABX 20-30 D 20-30 BF3-I 4PI

TABLE VI. Values for £(£2,0*' — 2

r

) i in units of b\).

Nucleus Present experiment 4 p-mesic x rays

b Coulomb excitation c Theory d Theory 4

1 6 0s 3.30 t0. .36 3.15 ±0.03 3.08 ±0.21 2.96 3.05

ls -Os 3.00 -t 0.36 2.34 ±0.03 2.75 ±0.12 2.72 2.75

t;*u Os 2.15 ±0.43 2.48 ±0.02 2.40 ±0.11 2.59 2.54

1!!2 0s 2.06 ±0.46 2.10 ±0.02 2.02 ±0.09 2.56 2.34

4 Computed from Eq. (9), using the values for Q0 from Table V.

11 From Ref. 26.

c Weighted average from Refs. 27 and 28.

J From Ref. 5.

e From Ref. 6. TABLE XII. Characteristics of the giant quadrupole resonance. The fitting interval used for the Lorentz-curve fits

is 20-23 MeV.

£, <V r, * EqA

in (1.60£m) b u_ 2 (expt) d cr_

2

( thy ) e Nucleus (MeV) (MeV) (Me V0 (MeV) (MeV) (MeV mb) (S/Sj) 0 (mb MeV-1

) (mb MeV' 1

)

l83 0s 22.3 ± 0.2 76 ± 6 3.3±0.6 131 22.7 453 ±107 0.12 0.37 0.49

‘‘‘’Os 23.0 ±0.3 51 ±5 5.0 ±1.0 132 22.4 407 ± 121 0.12 0.77 0.45 ‘"Os 23.8 ±0.3 32 ± 4 4.0±0.9 137 22.1 202 ± 71 0.06 0.36 0.47

i: -Os 23.9 ±0.1 65 ±4 2.8±0.4 138 22.1 288 ± 59 0.03 0.50 0.47

' Relative uncertainties. Theoretical prediction of Ref. -12 isee text). Em S q is the quadrupole strength defined as 4-ittr, Computed as Sq /Eq

". Computed from Eq. t!2).

is the CDR energy from Table TV. Sd is the dipole strength defined as - [a (l) T( 1) ~u (2) T(2) 1.

I uj

tnm o

o 3

5 2 §5Z, 71

es O

zr. -c

> a

S S

rj* CO TJ* rj*

00 rl CO © ©

co © © © ©

CM . CM CM

C- © © CM CM

(M F- 00

CO CO CO uo

00 M O M Cl

CO CM O ©

p- Cl CM CM O'] o’ © o’ o ©

© © oo © -n* l> CO CM CM Cl —• CM CM CM CM

7) 71 7) 71 o o o c

g S 3 Si

TABLE IX. Integrated cross sections , <r irl {y,x) = j <J(y,x)dEy, integrated from threshold to £j,lnav Uncertainties are discussed in Sec. II of the text.

E y max f,nt (V. in) ^in.lT.2 n) (7.3«) d,nt (7. 2«) (Tim (y,«t> 7r [cr m( 1)

r

( 1) 7crm(2)r(2)l 4

Nucleus (MeV) ( Me V b) ( Me V b) (MeVb) J jni(7> nt) 0.06.VZ/A 0.06.VZ/A

186 Os 19.67 b 2.04 0.46 ... 0.19 0.93 ±0.09 1.15 ± 0.12

H80s 30.42 2.62 0.88 0.12 0.24 1.33 ± 0.09 1.36 ± 0.08

1 ’Os 29.92 2.13 1.00 0.21 0.30 1.23 ± 0.09 1.24 ± 0.06

1

' l'Os 30.42 2.01 1.08 0.14 0.33 1.18 ±0.08 1.27 ± 0.10

u20s 29.92 1.92 1?20 0.19 0.36 1.20 ±0.08 1.27 ±0.11

4 Uncertainties listed here are relative; to obtain the absolute uncertainty a systematic uncertainty of 7'I> ( 1 0 Co for

' E Os) must he folded into the values for ir m. Care must be used comparing values for i c 0s w.ith the rest because £,, ma , is so much different. form N3S-418

(R EV. 7-1 4-841 use OMM-N es-oc PH0T0NUCLEAR DATA SHEET 296

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

different.
.
298
R EF . B.L. Berman, D.D. Faul , R.A. Alvarez

Phys. Rev. 09, 1205 (1979)

METHOD

P. Meyer, D.L. Olson

Pape 1 of 3

ELEM. SYM.

Os 192 76

REF. NO.

79 Be 4 hg

EXCITATION ENERGY

SOURCE DETECTOR

REACTION RESULT TYPE range TYPE RANGE ANGLE

G, IN ABX 7-30 D 7-30 BF3-I 4PI

G,2N ABX 13-30 D 13-30 BF3-I 4PI

G,3N ABX 20-30 D 20-30 BF3-I 4PI

Photoneutron cross sections, including <r[(y,n) (y.pn)]. <r[(y,2n) 4- (y,p2n)], and <r(y,3n), were measured for

!,, Os.;,,Os.

ia°Os. and l,:Os from 7 to 30 MeV and for

l86 Os from 11 to 20 MeV. with a photon energy resolution of about 300 keV. The source of radiation was the monoenergettc photon beam

obtained from the annihilation in flight of fast positrons. The partial photoneutron cross sections were

determined by neutron multiplicity counting, and the average neutron energies for each multiplicity were

determined simultaneously with the cross-section data by the ring-ratio technique. Nuclear information

extracted from the data includes parameters of the giant dipole and giant quadrupole resonances, integrated

cross sections and their moments, nuclear symmetry energies, and nuclear deformation parameters and

intrinsic quadrupole moments. No fewer than eight kinds of evidence point to a sudden change of behavior between "’Os and l,0Os, which could be interpreted as a phase transition from a statically deformed prolate nucleus to a y-unstable one, in general (but not detailed) agreement with the prediction of a dynamiccollective-model calculation.

NUCLEAR REACTIONS l>8* *»»• 18i ,90> 192Os (y ,n , 2n , Zn), £r = 7-30 MeV; measured 4ir neutron yield, multiplicities, average energies for monenergetic photons; cr (£r , In), <r(£r ,2n), a(£r ,3n), GDR parameters, nuclear shape para- meters, integrated cross sections and moments, GQR parameters, nuclear phase transition.

TABLE IV. Parameters for classical theories (given

in MeV).

Nucleus E* 1 a* ri C K6

l *Os 14.21 =0.06 81.1 =0.3 34.0 = 0.1 23.9 = 0.9 wOs 14.19 = 0.05 31.3 = 0.3 34.0 = 0.1 27.3=0.5

I890s 14.01 =0.04 30.4 =0.2 33.6 = 0.1 27.3 =0.4

l90 Os 13.33 = 0.06 79.5 = 0.3 33.1 =0.1 26.6 = 0.7

192 Os 13.79 = 0.04 79.6 =0.2 33.1 = 0.1 26.3 =0.7

1 Mean energy of the giant resonance, defined as £_

= (£„U>- 2£„‘2'l/3, except for 1<E'Os, for which £_

= (£„(!>- £J2)J/2.

0 Hydrodynamic parameter, defined by En - aA~ 1/:>

. c Collective parameter, defined by E^=i3A~ 1/6 Nuclear symmetry energy, computed from Eq. (2)

.

TABLE V. Nuclear shape parameters.

Nucleus h

b e

c <V lb)

l **Os 0.95=0.27 1.138 =0.016 0.366 = 0.031 0.194 ±0.016 5.76 =0.49

lo8 Os 0.44 ±0.03 1.177 = 0.011 0.346 = 0.021 0.133 = 0.011 5.49 = 0.33

189 0s 0.51 =0.07 1.173 = 0.003 0.333 =0.015 0.179 = 0.003 5.38 =0.24

190 Os 0.32 = 0.10 1.149 = 0.013 0.292 =0.029 0.155 = 0.015 4.65 = 0.46

192 Os 0.30 =0.11 1.145 =0.016 0.233 =0.031 0.130 = 0.016 *4 .55 * 0.50

1 Area ratio, defined as cr^iun l)/<x„,l2>r(2).

^ Deformation parameter, computed from £m['2)/E mt I) - O.Ollr; -0.089.

c Nuclear eccentricity, computed from tip 2 - l)p~ 2/3

. d Deformation parameter, defined as 71 r/5) 1/2 t

.

e Intrinsic quadrupole moment, computed from Eq. t S) , with £„ taken to be 1.26 fm.

form N 3 S- 41 B IR EV. 7-1 4-641

...’6 20 24 28 32 150

1

—

1 i

'6 20 24 28 32 Photon Energy (MeV)

FIG. 14. Cross-section differences above the GDR;

the two-component Lorentz -curve fits to cr (y ,n

t

i shown

in part (a) of Figs. 3-6 were subtracted from the data

points to give these differences, which were in turn

fitted with the single-component Lorentz curves shown

here as solid lines: (a) for 138Os; (b) for l3,,Os; (c) for 1MOs; (d) for IJ2Os.

(over)

use OMM-N BS-OC PH0T0NUCLEAR DATA SHEET 299

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
16 20 24 28 32

\ 480 f

360

240 A

E 120

coZ 0 L

(bl

(y.n) < 7. 2n)

3 Juu

240 (cl :\

180

' \,

. 120 \

60 Vi,.,.

T , (7.nJ (7.2n) (7.3n) li

J [| |

Photon Energy (MeV)

FIG. 6. Photoneutron c ross sections for 18JOs: (a) with a two-component Lorentz-curve fit; (b) cr(Y,l n); (c) a ly ,2n); (d) c (y ,2n).

FABLE Iff. Parameters ot Lorentz-curve tits to the giant dipole resonance. Lorentz parameters defined bv Eq. 1

1

j • the fitting interval for all cases is 10. 8 to 18.3 MeV

Nucleus Em\ 1) ( MeV) ir„( 1)

J

( mb) rmi Me V) E^i2) (MeV) t„(2 1 “ (mb) r<2) i MeV) X2

1 ' ,; Os 12. 03 * 0 09 308*21 3.13 *0.24 15.26 =0.09 302 * 23 3.33 *0.21 0.64

1 Os 12.91 t 0.05 260 *18 2.76 *0.13 14.38 *0.07 390* 14 4.19*0.13 0.96

1 -'Os 12.08 *0.04 26,8 i 14 2.71 * O.10 14. 0-' *0.0.5 395- 11 3.62*0.10 0.75

1 °Os 12.68 * 0.07 206 *29 2.00 *0.21 14.40 *0.09 401 *24 4.16 *0.11 1.19 '' 2 Os 12.08 *0.06 206 *34 2.49 to 23 14.35 *0.12 339 = 26 4.41 =0.13 0.95

l ncertainties for <Jn given here are relative. The absolute uncertainties are 7 1 110 o for

TABLE VI. Values for flit'2,0' — 2

r

i (in units of b

z K

1?6 Osi.

Nucleus Present experiment a

p--mesic x rays

s Coulomb excitation 0 Theory J Theory £

1 c Os 3.30 *0.56 3.15*0.03 3.03 *0.21 2.96 3 05

1 ’Os 3.00 *0.36 2.34 *0.03 2.75 - 0.12 2 72 2.75

‘""Os 2.15*0.43 2.49*0.02 2.40 *0.11 2.59 2.54

,a2 Os 2.06*0.46 2.10 *0.02 2.02 *0.09 2.56 2.34

Pace 2 of 3

Computed from Eq. 1 0) , using the values for from Table V. From Ref. 26. Weighted average from Refs. 27 and 28. From Ref. 5. From Ref. 6. 300
ref B.L. Berman, D.D. Faul , R.A. Alvarez, P. Meyer, D.L. Olson

Phys. Rev. C19., 1205 (1979)

Page 3 of 3

ELEM. SYM.

Os 192 76

REF. NO.

79 Be 4 hg

R E AC T ION RESUL T excitation SOURCE DETECTOR

ENERGY TYPE RANGE TYPE RANGE

ANGLE

G, IN ABX 7-30 D 7-30 BF3-I 4PI

G,2N ABX 13-30 D 13-30 BF3-I 4PI

G,3N ABX 20-30 D 20-30 BF3-I 4PI

TABLE X. Integrated cross-section moments. cr_

, ± j cr(y ( „t )£

“ 'dEy andcr_2 M<t(y,n t )Ey~ldEy

integrated from threshold to E yr., ax .

0.05175Ai/3 T. t cr_

1^. -4/

3

<T_<) cr.2 t-iK cr_2 Nucleus (mb) (mb) (mb MeV-1

) 0.00225A

3

' 3 0.05175A 5 / 3 (MeV)

i86os* 179 0.168 13.2 0.97 1.22 23.8 ±2.4

l3S Os 239 0.222 16.7 1.20 1.45 19.1 ±1.3

183 Os 228 0.210 16.7 1.19 1.41 19.3 ±1.4

190 Os 220 0.202 15.3 1.12 1.30 20.6 ±1.4

132 Os 224 0.203 16.0 1.12 1.31 20.6 ±1.4

a Care must be used in comparing values for 18S Os with the rest because £ vm„ is so much

different.

TABLE XII. Characteristics of the giant quadrupole resonance. The fitting interval used for the Lorentz-curve fits

is 20—28 MeV.

£ a" aC.n fl £,.4 13 (l.C0£ m) b (/_ iexpt) d <7_ 2 (thy)

e

Nucleus (MeV) (MeV) ( Me V) (MeV) (Me VO 1 MeV mb) (S„/Sd

) c (mb MeV-1

) (mb MeV 1

)

183 Os 22.8 ±0.2 76 ±6 3.3 ± 0.6 131 22.7 453 ±107 0.12 0.37 0.49

1,i:l Os 23.0 ±0.3 51 ±5 5.0 ±1.0 132 22.4 407 ±121 0.12 0.77 0.45

'•^Os 23.8 ±0.3 32 ±4 4.0 ± 0.9 137 22.1 202 ± 71 0.06 0.36 0.47

1 c Os 23.9 ±0 1 63 ±4 2.8 ±0.4 138 22.1 238 ± 59 0.03 0.50 0.47

1 Relative uncertainties.

h Theoretical prediction of Ref. 42 isee text). En is the GDR energy from Table IV.

c S j is the quadrupole strength tlcfincd as f , Sd

is the dipole strength defined as f- (cr^tl) T( 1) *'tm(2) Tt 2 ) I

.

J Computed as \/E4

~. e Computed trom L'q (12).

form N3S-418

IR EV. 7-1 4-641 USC OMM-N BS-0 C

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 301
302
Ir

IRIDIUM

Z=77

Iridium is a precious heavy white metal with a density only

exceeded by osmium. The metal is insoluble in acids and is

not even attacked by aqua regia. The metal has no important

applications because of difficulties in preparation and

fabrication.' The elements prinicipal use is in the

preparation of platinum alloys.

Smithson Tennant, a British scientist, discovered the

element by studying the small black residue for a time

thought to be graphite which resulted from dissolving

native platinum in aqua regia. Tennant named the material

iridium because of the range of colors associated with its IR compounds.

Ir

303
304
T. Kaminishi, C. Kojima

Jap. J. Appl. Phys. 2, 399 (1963) Ir 77

METHOD

Linac; isomer yield; activity

REF. NO. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G/ RLY 1 c 5 ACT1

k?l

(0.129, < 0.07

Tabli II. The isomers observed

Isomer Observed value Referenced value1 l)l3)

Half-life Energy (MeV) Half-life Energy (MeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.161 Br-79m 4.80 sec 0.209 4.8 sec 0.208 Sr-87m 2.3 hr 0.390 2.8 hr 0.38S Y-89m 15.0 sec 0.920 U sec 0.915 Rh-103m 58 min * 57 min 0.040 Ag-107m 1 | 0.95

44 sec 0.094 Ag-109m f 42 sec 40 sec 0.088 Cd-lllm 47 min 0. 150.0.255 49 min 0.150,0.247 In-115m 4.5 hr . 0.335 4.5 hr 0.335 Sn-117m 17 day 0.160 14 day 0.159,0.161 Ba-137m 2.6 min 0.660 2.6 min 0.662 Er-167m 2.10 sec 0.209 2.5 sec 0.208 H£-179m 18.5 sec 0.157,0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 5.5 sec 0.1025,0.2915 others

Ir-191m 4.90 sac 0.129, <0.07 4.9 sec 0.042-0.129 Pt-195m 4.5 day 0.065** 4.1 day 0.031-0.130 Au-197m 7.0 sec 0.10.0.27,0.40 7.2 sec 0.130,0.270,0.407 Hg-199m 43 min 0.160,0.370 42 min 0.158,0.368

* This isomer was measured with a G-M flow counter.

** This value corresponds to Pt-K X-ray energy. Table III. Induced activation rate

Element Beam

energy i (MeV)

Counting rate-

( x 1CC00 cpm)

Sr.mplc form

Se 3

1 1300 j metallic pellet 3r ,

I 4

i 1600 XaBr grain Sr 6 | 0.3 SrCOj powder Y 5 ; 90 metallic grain

Rh 5 0.2 * RhCla grain

Ag 5 , ISO metallic plate Cd 6 0.5 CdCi: grain

In • 6 8 metallic plate Sn 6 0.0005 metallic plate Ba

1 3 0.6 BaS powder

Er

1

1 4 4900 Er^Oa powder

Hf

1 ^ 1600 metallic plate W 1 5 120 metallic powder

Ir i 5 2100 metallic powder

Pt

1

i 0 0.3 metallic plate Au i 4 4300 metallic plate Hg

i 6 0.09 metallic liquid

* The value measured with a G-M flow counter.

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUKCAUOr STANBASO;

FORM NBS-41* 1DCV 7*1 AMI

i/sc^MM-oe 2«oto.p«4 PHOTONUCLEAR DATA SHEET 305
REF. A. Veres

Acta Phys. Acad. Sci. Hung.J^ ? 26L-73 (1963)

ELEM. SYM.

Ir 77

METHOD

Radioactive source

REF. NO.

63 Ve 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G/ ABX o 1 D 0-

1

NAI-D

IS0MERS

Tao/imja II H3MepeHHbie 3HaneHHH noc.ne ooayKeHiiH, cpaBHHBae.Mbie c apvniMH aiiTepaTypHbiMii

aaHHblMIi

Djicmcht

AKTHBHOCTb o&nyveHHR

nocae

Aktmbh.

DKCTpn.

B KOHue

JlyTepaTypHbie aaHHue HaHHue

l M3MepeHHfl

i r

nepBoro H3MepeHHH

(hmit/mhh. )

ooiiyM.

(hmti/ MHH.) T,„ E

(K3B) T,/,

|

E

(K3B)

(10- "cm*)

* ym

(lO-^SB)

Se-77m 3842 ±96 5400 17,5 ceK. 160 18,1 ±1 ceK. 160± 10 9,5 1,75 Sr-87m 191 ±5 200 2,8 m. 390 2,9 ±0,1 4. 365±25 0,85 0,2 y-89m 96 ±20 170 16 ceK. 910 16,7±5 ceK. 0,08 0,02

Rh-103m 28±5 31 57 MHH. 40 58 ±2 MHH. 20,5 ±0,5 0,08 0,01 Ag-107m 220 ±14 250 44 ceK. 93 43,8 ±0,6 ceK 91 ±10 0,8 0,2 Ag-109m 39 ceK. 88 Hf-179m 80± 18 155 19 ceK. 160; 215 19±2 ceK. 1 0,2

Ir-191m 90 ±20 250 4,9 ceK. 42; 130

5 ±2 ceK. 5,6 1

Pt-195m 90±9 100 3,5 a. 31;

100;

130;

3,5 ±0,2 a. 32±3

67,5 ±5

96±5

130± 10

0,2 0,04

Au-197m 240± 16

1

520 7,2 ceK. 130; 277; 407

7,2± 1 ceK. 68:130: 280 ±20

390 ±20

0,07 0,01

Hg-199m 9,6 ±3,2 42 MHH. 160; 370

0,005 0,001

Acta Phy,. Hung. T»m. XVI. Fate. 3.

FORM NBS-418 (REV. 7-14-94)

IJSC OMM-OC 29010-P64 PHOTONUCLEAR DATA SHEET 306

U.S. DEPARTMENT OF COMMERCE

N A T 1 ON A ' SUREAU OF ST ANDAROS
ref. A. Veyssiere, H. Beil, R. Bergere, P. Carlos, A. Lepretre,

A. De Miniac

J. Phys. Lett. 3J5, L267 (1975)

ELEM. SYM.

Ir 77

REF. NO. 75 Ve 5 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE type RANGE

G,N* ABX 8- 22 D 8- 22 MOD-I 4PI

G,2N** ABX 13- 22 D 8- 22 MOD1

4PI

Abstract. — Partial photoneutron cross-sections [o(y, n) + o(y, pn)], and dy, 2n) of W, Re, Ir, Pt and Hg were measured by means of monochromatic photons of 8 MeV < E < 22 MeV so as to study the giant resonance. The experimentally observed evolution of the shape of the GDR, as one

proceeds from permanently deformed prolate nuclei (W and Re) towards oblate or even triaxial gamma unstable nuclei (Pt), corresponds to the theoretical predictions of the dynamic collective modeL

* 1026+

**1027

tjf.n) CROSS-SECTIONS

Fra. 1. — Sections efficaces partielles a(y, n) + <r(y, pn) des noyaux W, Re, Ir, Pt, Hg.

(XJht CROSS SECTIONS

Fra. 2. — Sections efficaces partielles ais, 2a) des noyaux W

Re. Ir, Pt, Hg.

(over)

form N3S-418 REV. 7-1 4-641 USC OMM-N 0S-O C PHOTONUCLEAR DATA SHEET 307

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
fOTRL CROSS-SECTIONS

Fig. 3. — Sections efficaces totales a-^E) des noyaux W. Re,

Ir, Pt, Hg.

308
TIR

A=191

Ir A=191
310
REF. H. Langhoff

Phys. Rev. 136 , BL590-93 (1964)

EL EM. SYM. Ir 191

METHOD

Radioactive source; centrifuge compensation

REF. NO. 64 La 4 NVB

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

n c. LFT 0-1 D 0-1 NAI-D 125

+ in r? +crrr rn

539 keV level T = (l.l_

Q ^

) x 10 sec.

(590 ± 15) keV level 5 x

10" ^ <t <1.5 x 10

1L sec.

Tvule I. Ml transition probabilities in Irm. The experimental information about the Ml transition probabilities T„p (column 5)

,, 0|,tained from the resonance fluorescence investigation and from lifetime measurements of the 129.5- and the 82.5-keV level. The

..jmcd branching ratios Tyui/1' (Tyui partial width for the Ml transitions, T total width) and spins are listed in columns 3 and 4.

;;-.c results are compared with the transition probabilities expected from the Weisskopf formula and from the Nilsson model, Twk

1.-, i TSIImmEy

(keV)

rT «i Assumed

spins

T'exp 109 sec”1

TWk

Assignment ^N’iluoo 10® see”1

Niiasoo r T'exp 625 0.43 § —• J <40 >110 (41 1)T- (402)1 445 >n

495 0.16 5 . 5 <13 >180 -(402)1 215 >16

85 0.038 i i < 3 > 4 — (411)T 4.4 > 1.5 y>o 590 (402) T- (402)1 5700

539 539 0.35 33 91 T OC'J 640 19 410 0.25 23 57 -(402)1 190 8 457 0.09 §-*§ 8.4 218 — (400) t 40 5 360 0.20 tJ

19 47 — (400) r 16 i 188 0.012 1.1 115 — (400) T 0.6 0.5

129.5 129.5 0.23 1.6* 26 (402)1- (402)1 2.3 i 52.5 82.5 0.056 J-i 0.010» 1000 (400)1- (402)1 0.019 2

• Krlrrcnce 13.

» Reference 14.

U.S. DEPARTMENT OF COMMERCE form NBS-418 NATIONAL tfUREAUOF STANDARDS

(REV. 7-14-84) UICOMM.BC 26010-PS4 PHOTONUCLEAR DATA SHEET 311
M. Schumacher, H. Langhoff

Phys. Rev. 162 . 1153 (1967)

METHOO

ELEM. SYM. A

Ir 191 77

67 Sc 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 0- 1 D 0-1 SCD-D 0-1 125

N O N

o o oo o

o o o o o

o o o o o

I , K

S

r (Nn*A>I 935.3

762.2

<0 O O N; a z

0, «« NN.OO O O° ’ o o o o o

<\J —

UJ 2 OJ fM j j -(512); pi*

I

2 658

(4ii)t 624

(402W 5Q8

568

(4i D) 539

(400)) 351.2

(402)i 348

(400))

(505))

(402)1

, (4000

I402D

186.8 178.9

171.2

129.4 82.3 -/"

5* 0 01% 7 3 m 2 2 2 2 2 nsmonSqq <ou>m N 0< PJ (O o O O K 5 U «. K

2 to 3® 5j OOO -OOOOooS(0 mi«"*

r- m ~ l IoOO#no»0

BIOOflJlOlON

to V <M fflCDJTKJMOffjOS CDlfl-f0(0O(D©

nooN — <D — <M 3 r

lO U) N N ^ lOfMN-ONlO fM «© ® /SQ % 7 3

- O — O O <0 NN

a? U)0 r» o v as© ^ ©

% 77

z % as

8 % 7.7 ''51% 7.0 Ir

191 77 *' 114

539. 588 KEV

Fig. 5. Level scheme of Ir 1 " based on the presently available information, including the results of this investigation The numl*:.

associated with the transitions are the energies (keV) and the (y+ce) intensities per 100 Pt m decays. The quantum numbers assigned ir. terms of the Nilsson model are given on the left side. The transitions at 41 .8, 47, 49.5, 85.2, 186.8, and 272.0 keV are taken from previom

investigations (Refs. 2-4). Levels for which the existing evidence is weak are indicated bv dashed lines. A detailed discussion is given ir. the text.

Table I. Results of the rcsonancc-fluorcscence experiment, gi and gi are the statistical weights of the ground state and excited «»•, respectively. T« represents (he level width for the y transition to the ground state and T the total level width. ri,„i is the mean lift:,-, of the level. (ftrV//{ir)u« k.v and (gtr.’/SiHiM k»v are the weighted averages of the results of the present and (he previous meai^-. ments.* r»/r is calculated from the y intensities given in Table II and from the conversion electron intensities given by Harmatza *•

£,(keV) *,r.v«.r(eV) r./r T|.„|(scc)

539 (7.84±0.54)X10-‘ 0.41 ±0.02 3/2 — 3/2 (1.44±0.11)X10-"

588 (3.74±0.42)X10-* >0.5 (5/2) —* 3/2 (i.76±o.20)(*,/*,)(r,/r)*xio-» 624 <1.5X10-* 0.60 5/2 — 3/2 >2.4X10-"

659 <1.9X10-* 7.0 X10-* >1.7g,/g,XlO- , ‘

1 H. Langhoff, Phys. Rev. 136 . B1590 (1964)*

2 B. Harmatz, T. H. Handley, and J. W. Mihelich,

Phys. Rev. 128 , 1186 (1962).

»

i

form NBS-418

(REV. 7-14-04) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 312

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. A. V. Davydov ? G. R. Kartashov and Yu. V. Khrudev

Yad. Fiz. 7, 735 (1968)

Sov. J. Nucl. Phys. 7, 447 (1968)

ELEM. SYM.

Ir 191 77

METHOD REF. NO.

68 Da 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

$G,G NOX 1 D 1 NAI-D DST

(129 keV) (129 keV)

Magnetic moment measured to be 3.00±0.58 nm

MAG MOM

FIG. 3. Angular distribution of

1 29-keV 7 quanta resonantly scattered by Ir

1 *1

, The experimental points are plotted for angles 8 = 0„ (see Fig. 2). The solid curves is the result of the reduction of the experimental data

in accordance with formula (4).

*(»)

form NBS-418

(R EV. 7-14-44) USCOMM-OC 24 010- P44

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 313
REF- A.M. Goryachev and G.N. Zalesnyi

Yad. Fiz. 27, 1479 (June 1978)

Sov. J. Nucl . Phys. 27^ 779 (June 1978)

ELEM. SYM.

Ir 191 77

REF. NO.

78 Go 3 hmg

11/17/80

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,XN ABX 8(8.1 ) -21 C 8-21 BF3-I 4PI

Photoneutron yield curvet have been measured for the isotopes l,u,1

Ir and in the n multiplicity measurement

bremsstrahiung beam of a betatron in the energy range 8-21 MeV with a 0.2-MeV step. For the

isotopes l,41,fcl,,Pt we have also measured the photoneutron multiplicity curves. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the PenfoldLeiss method with a 1.0-MeV step. The multiplicty curves were used to separate the contributions of (y,n) and (y,2n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated

cross sections, deformation parameters, and average energies. The existence of oblate deformation in these nuclei is not confirmed by the analysis of the measured cross sections.

FIG. 1. Photoabsorption cross sections for the Isotopes

lM.nsjr

^

m.m.m.isept xhe vertlcal llnei3f who8e length

Is equal to two standard deviations, show the experimental

cross section. Above the (y,2n) threshold the photoabsorption cross section Is designated by circles.

TABLE m. Integrated cross sections.

,f, Ir -Ip "Pt '"Pt -Pt '-Pt

ainf <WT. 2a). MeV-mb

2757*23 2835* 30 -

2861*27 626*9

2797*25 2944*21 744*9

2813*32

1023*14

O^L. MrV-mb* 3741 3899 022

3739 3766 025

3884 026

3841 NZ/A

J. j

. mb

9-, A-*'.

9.2 .M*V*‘.mb

9-«-4 -V.

1.36 199*22

0.181

14.85 ±0.15

0.00234

1,40 205*2

0.184 15.33*0.13 0.00238

1.34 210*2

0.187 15.35*0.14 0.00236

1.34 204*3

0.180 15.39*0.12

0.00235

1.38 213*22

0.187 15.96*0.11

0.00241

125

236*2 0204

15.43*018

0.00229 •Calculated In the case of validity of hypothesis 2) cm the basis of the formula <r

{

m

L= (it/ 2) (et T, + cr2 T2

) .

a

int correctec* f° r neutron multiplicity

TABLE IV. Parameters of Lorentz curves.

NucJem

'"Ir ’"Ir '•Pt '"P»

"•Pi

'•PI "Pi

E'.McV r,.MeV a,, mb EwMeV r„ MeV a,, mb a, r,/ /<h r,

1285*0.04 270*0.07 294*8 14 82*0.06 5. 30*0-21 299*10 05

13.01*0.04 261*0.06 317*10 14.77*0.06 6.44*0.31 257*12 0.5 1296*0.04 229*0.07 306*10 1424*0.10 5.33*Ot 22 299* tl 0.5 12.99*0,05 270*0.07 296± 10 14.59*0.11 5.46*0.27 793*15 05

13.07*0.05 272*0.08 303*11 14 40*0.12 5.97*0.29 276*13 0.5 13.06*0.05 257*0.09 284*12 14.34*0. 1

4

6.27*024 2CO*16 05

1388*0.02 4.45*0.06 514±6 -

TABLE V. Average energies.

Nucleus Nucleus M«V» kM-A'/• Ima'a

"Mr 14.16 81.6 34.0 •pi 14.06 815 33.9 '•Ir 14.18 82.0 34.1 •pt 13.96 81.1 33.6 ‘“Pi 14.01 81.1 33.7 '•pt 1391 81.1 332

•Calculated in the case of validity of hypothesis 2) according to the formula E„ = (I/3)Et + (2/3)£2

.

form N3S-418

'REV. 7-14- 64) USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 314

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ir A=193

.
316
K. N. Geller, J. Halpern, and E. G. Muirhead

Phys. Rev. _118, 1302-12 (i960)

, EL £M. SVM.

Ir 193 77

METHOD

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N N0X THR C THR BF3-I 4 Pi

THRESHOLD

Table I. Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccntcr-of-mass system in Mev.

i< ('action No. runs Present results Other results Method Reference

Ir'“(7,n)Iru

7.79 ±0.05

«

-pm N3S-418

r. i 4- «4» -tc;;gclg.

U.S. DEPARTMENT OF COMMENCE

NATIONAL. aUREAUOr 3 TAmOA*-O.S 317
REF' F. R„ Metzger

Phys. Rev. l6l . 1249 (1967)

[See F. R. Metzger

Phys, Rev. C2. 2024 (1970)1

METHOD

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.G LFT 0- 1 D 0- L SCD-D n- 1 105

EL EM. SYM.

Ir

REF. NO.

67 Me 2

193 77

HMG

. Table II. Radiative widths of the Ir“* levels studied in this paper. The value of the partial radiative width for the transition listed in column 2 is given in column 6. The spin value assumed for the resonantly excited level is given in column 3, the ground-state branching ratio in column 4. The relative y intensity used for the calculation of the radiative width is listed in column 5. For comparison

purposes, columns 7 and 8 provide the single-particle estimates* for the Ml and £2 widths.

Level (VeV) Ey

(keV) Spin r,/r y intensity in Os*“ decay

Radiative width (1CT* eV) r(3/l)„

(10-‘ cV) r(£2).p (10-‘ eV)

559 559 (!) 0.73 13 27±6 320 0.3 486 <1.2 <10 710 0.14 420 5.1* 10±2 140 0.07 557 557 (!) 0.73 38 <12 320 0.3 484 4.6* <1.5 210 0.14 418 <1.3 <0.4 140 0.07 460 460 ! 0.48 100 1. 6±0.3 180 0.11

* J- M. Blatt mod V. F. Welukopf. Thtortlieal ffudtar Phyzies (John Wiley & Son., Inc.. New York. 1952). Chap. 12. Ttaw lnten.it/ «u calculated under the anumption that the corresponding traiultlon from the other member of the 557-559 keV doublet U abwnt.

form NBS-418

(R EV. 7-1 4-S41 USC OMM-OC 28010-P94 PHOTONUCLEAR DATA SHEET 318

U.S. DEPARTMENT OF COMMERCE

NATIONAL 8UREAUOF STANDARDS
F. R. Metzger

Phys. Rev. C2, 2024 (1970)

ELEM. SYM. A

Ir 193 77

REF. NO.

70 Me 6 hrag

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

Type RANGE TYPE R AN GE G,G LET 0-1 D 0-1 SCD-D 0-1 t— o

SEE 67ME2

TABLE I. Mc.in Uvea of Ir m levels. The valuos listed La columns 5—7 were determined using the dclaycd-coincldeoce

technique. Multiplication by CT#/r), n€W/(r#/r),#n will adjust the lilcttmcs listed in column 4 to new values for the branching ratios.

Level energy

(keV) Spin r,/r Res. scatt.

Mean lives in Avida

el al.

. (Ref. 1)

pace Lindskog

et al. (Ref. 2)

Valivaara

et al. (Ref. 3)

460

.1a 0.43±0.02 1643 2747 204 13 224 8 557

12 0.54 40.04 <6 <67 494 12 559

5

2 0.7040.04 1.654 0.24 <300 <280 <110

FORM NBS-418

(R EV. 7-1 4-S4I USCOMM-OC 26010-P64 PH0T0NUCLEAR DATA SHEET 319

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ppp A.M. Goryachev and G.N. Zalesnyi

EF

' Yad. Fiz. 27, 1479 (June 1978)

Sov. J. Nucl . Phys. 27, 779 (June 1978)

ELEM. SYM.

193 I r 77

METHOD REF. NO. 78 Go 3 hmg

11/17/80

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABX 7(7.8) -21 C 8-21 BF3-I 4PI

Photoneutron yield curves have been measured for the isotopes 1,u,,

Ir and l ’41”' 1,‘ l,,Pt in the n multiplicity measiirpmpnf

bremsstrahlung beam of a betatron in the energy range 8-21 MeV with a 0.2-MeV step. For the

isotopes l94 l%’ 1,,Pt we have also measured the photoneutron multiplicity curves. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the Penfold- Lass method with a 1.0-MeV step. The multiplicty curves were used to separate the contributions of (y,n) and (y,2n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated

cross sections, deformation parameters, and average energies. The existence of oblate deformation in these nuclei is not confirmed by the analysis of the measured cross sections.

FIG. 1. Photoabsorption cross sections for the isotopes

lilting 1IM| m.iK.iK.isept xhe vertical lines, whose length

is equal to two standard deviations, show the experimental

cross section. Above the (y,2n) threshold the photoabsorption cross section is designated by circles.

TABLE HI, Integrated cross sections.

•*Ir *Pt '"Pt •Pt *Pt

Omt.M.V-mb 2757*23 2835* 30 2861*27 2797±25 2944*21 2813*32 <W7. 2n>. - __ 628*9 - 744*9 1023*14 MeV-mb 042 __ 045 036

NUV-mb* 3741 3899 3739 3766 3884 3841

Oj-JL/60 NZ/A 1.36 1.40 1.34 1.34 1.38 1.35 a mb 199*24 206*2 210*2 204*3 213*24 238*2

9-1 -A-*'* 0.181 0.184 0.187 0.180 0187 0404

a mb 1485*0.15 15.33*0.13 1535x0.14 15.39*0.12 15.96*011 15.43*0.18 9-,-A-". 0.00234 0.00238 0.00236 0.00235 0.00241 0.00229

Calculated in the case of validity of hypothesis 2) on the basis of the formula crm L = (tr/2)

+

^Tj).

a- ^ is corrected for neutron multiplicity

int

TABLE IV. Parameters of Lorentz curves.

Nudcu* £,.MeV Ti.MeV a,, mb £» MeV r„ MeV o». mb <». r,/ /<* r,

,«ir 1185*0.04 2. 70 ±0.07 294*9 14 82*0.09 5.30*041 299*10 0.5 "Mr 13.01*0,04 161 ±0.06 317110 14.77±C.09 6.44±0.31 257*12 0.5 '“Pt 12.96*0.04 249*0.07 306*10 14-54 ±0.10 5.33*022 299* M 04

'"Pt 12.99*0.05 2.70*0.07 296*10 1449*0.11 5.46±0.27 293*15 0.5 'Pt 13.07*0.05 2.72*0.08 303*11 14.40*0.12 5.97*049 276*13 0.5 "PI 1006*0.06 237±0.09 284*12 14.34*0.14 6.27*044 2G0±16 04 'Pt 1058*0.02 4.45*0.08 514±6 - - - -

TABLE V. Average energies.

Nudeui SuhttoV* e.tiA"* NucJeue SjyA'/i E

"Mr 14.16 81.8 34.0 pt 14.06 814 339 "Mr 14.18 82.0 34.1 «pt 13.96 81.1 33.6 '“Pt 14.01 81.1 33.7 pt 1391 81.1 33Si

"Calculated In the case of validity of hypothesis 2) according to the formula £„ = <l/3)£, + (2/3)£,.

form N3S-418

(REV. 7- I 4-841 USC OMM-N BS-D C

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 320
Pt

PLATINUM

Z=78

Platinum is a silvery white, soft, ductile, metal valued as

a powerful catalyst with a high resistance to chemical

corrosion. The first known reference to the material was by

Julius Caesar Scaliger (1557) who wrote about a substance

found in the mines of Central America "which it has not

hitherto been possible to melt by fire or by any of the

Spanish arts". In the 18th Century there were references to

platina an unwanted adjunct of gold in the mines of

Columbia. The name platina is thought to have been a derogatory diminutive of plata, silver.

William Brownrigg, an English physician, did the first

recorded experiments on platinum; the results were reported

to the Royal Society in 1750. This publication stimulated

other European scientists to study the new metal.

Pt

321
322
Ref. ?.a« \t l.lNv'«r

r.Buftl* I Ikmt.rix. Ig, 707 (1962)

InUt ny,JMTf 15# H92 (1962)

Elem. Sym.

Pt 78

Ref. No. 62Sh2

Method>9 MT Ictat 6Cr

Reaction

(y,f)

EorAE E dE J

it Notes

Jagalsr 41itrlWtl« tf photeprotom

22.5

33.5

fltui to « ± bsla^9(l + fceaff)

2 ohoro

a,b oai f m |lm la tho srtlele.

Quedrapele aktorytiM U estimate#

to bo about 60.70$.

Table U. Measured yields Y of photoprotons from Rh, Pt, and Pb, and estimates based on the evaporation model and on the direct photoeffect

Element Rh Pt Pb

m«v 22.5 33.5 33.5 22.5 Y«*p' 1.3-10* 2.8-104 9.6- It)4 2.9* 104 protone/mole-roentfen —3 —6 -2000 ~1300

^eap^direct -3 —4.5 —20 —tl

1 1 I _L form NBS-418

(8-1-93) USCOMM-OC 18BS8-P83

FIG. 3. Energy distribution of 2364 photoprotons from Pt

for Eyrnax 33.5 MeV. Same notation as in Figs. I and 2. The

scale of curve 1 haa been enlarged 50 times.

FIG. 7. Angular distributions of photoprotons from Pt for Eyoax

" 33* S MeV* *-E

p - 7.25-14.25 MeV; x-E

p > 14.25 MeV.

U.S. DEPARTMENT OF COMMEROl.

N ATI ON A L BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 323
USC OMM*

OC 18888-P83 PHOTONUCLEAR DATA SHEET 324
NATIONAL BUREAU OF STANDARDS

-iCOMM-OC 18556-P63 PHOTONUCLEAR DATASHEET 325
Jap. J. Appl. Phys. 2, 399 (1963)

METHOO

Linac; isomer yield; activity

78

REP. NO.

. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ANGLE TV PC RANGE TV PC RAN68

G,G/ RLY 1 C 5 ACT1

i+PI (0.065)

Table II. The isomers observed

Isomer Observed value Referenced value 111131

Half-life Energy (MeV) Half-life Energy (MeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.161 Br-79m 4.80 sec 0.209 4.3 sec 0.208 Sr-87m 2.3 hr 0.390 2.8 hr 0.388 Y-89m 15.0 sec 0.920 14 sec 0.915 Rh-103m 58 min * 57 min 0.040 Ag-107m

1

I 44 sec 0.094 Ag-109m } 42 sec y 0.95 40 sec 0.088 Cd-lllm 47 min 0.150,0.255 49 min 0.150,0.247 In-115m 4.5 hr 0.335 4.5 hr 0.335 Sn-117m 17 day 0.160 14 day 0.159,0.161 Ba-137m 2.6 min 0.660 2.6 min 0.662 Er-167m 2.10 sec 0.209 2.5 sec 0.208 Hf-179m 18.5 sec 0.157,0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 5.5 sec 0.1025,0.2915 other

Ir-191m 4.90 sac 0.129, <0.07 4.9 sec 0.042-0.129 Pt-195m 4.5 day 0.065** 4.1 day 0.031-0.130 Au497m 7.0 sec 0.10,0.27,0.40 7.2 sec 0.130,0.270,0.407 Hg-199m 43 min 0.160,0.370 42 min 0.158,0.368

* This isomer was measured with a G-M f.ow counter.

** This value corresponds to Pt-K X-ray energy.

Table III. Induced activation rate

Element Beam

energy (MeV)

Counting rate

( x 1C0C0 cpm) Sample form

Se 5 1300 metallic pellet Br 4 1600 NaBr grain Sr 6 0.3 SrC03 powder Y 5 90 metallic grain

Rh 5 (0.21* RhCU grain

AS 5 180 metallic plate Cd 6 0.5 CdCU grain

In 6 8 metallic plate Sn 6 0.0005 metallic plate Ba 5 0.6 BaS powder

Er 4 4900 Er203 powder

Hf 5 1600 metallic plate W 5 120 metallic powder

Ir 5 2100 metallic powder

Pt 5 0.3 metallic plate Au 4 4300 metallic plate Hg 6 0.09 metallic liquid

rooM * The value measured with a G-M flow counter. aev ^., o*-=*V.o,o.PS4 PHOTQHUCLEAR DATA SHEET 326

g.s. department op commerce

NATIONAL SURKAUOP STANDARDS
REF. A. Veres

Acta Phys. Acad. Sci . Hung. JL6 , 261-73 (1963)

ELEM. SYM.

Pt 78

METHOO

Radioactive source

REF. NO.

63 Ve 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G/ ABX 0-1 D 0 - 1 NAI-D

ISOMERS

Taojuma II H3MepeHHbie 3HaHeHHH nocjie oo/iyHemiH. cpaBHiiBae.Mwe c ApyniMw JitiTepaTypHbiMii flaHHbJMU

3-nexeHT

AKTMBHOCTb

o&rcyMeHHfl nocne

Aktmbh.

OKCTpn.

B KOHUC

JlyTeparypHbie

naHHbie HaHHbie

HSMepeHHfi

ncpBoro H3MepeHHH

(HMn/MHH.)

ooiiyn.

(m«n/

MHH.) Tu. E

(K3B) T,l. E

(K3B)

(I0“ mcmb

) (10—*8B)

Se-77m 3842 ±96 5400 17,5 cew. 160 18,1 = 1 ceK. 160±10 9,5 1,75 Sr-87m 191 ±5 200 2,8 q. 390 2,9 ±0,1 m. 365 ±25 0,85 0,2 y-89m 96 ±20 170 16 ce«. 910 16,7±5 ceK. 0,08 0,02

Rh-103m 28±5 31 57 MHH. 40 58 ±2 MHH. 20,5 ±0,5 0,08 0,01 Ag-107m 220 ±14 250 44 ceK. 93 43,8 ±0,6 ceK 91 ± 10 0,8 0,2 Ag-109m 39 ceK. 88 Hf-179m 80±18 155 19 ceK. 160; 215

19 ±2 ceK. 1 0,2

Ir-191m 90±20 250 4,9 ceK. 42; 130

5 ±2 ceK. 5,6 1

Pt-195m 90±9 100 3,5 A. 3,;

100;

130;

3,5 ±0,2 a. 32±367,5 ±5

96±5

130±10

0,2 0,04

Au-197m 240± 16 520 7,2 ceK. 130; 277; 407

7,2 ±1 ceK. 68:130: 280±20

390 ±20

0,07 0,01

Hg-199m 9,6±3,2 42 MHH. 160; 370

0,005 0,001

Act* Phyt. Hung. Tom. XVI. Fate. 3•

FORM NBS*418

(REV. 7-14-64) USC OMM* DC 26010-P64 PHOTONUCLEAR DATA SHEET 327

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
I Yu.Ya. Glazunov, M.V. Savin, I.N. Safina, E.F.

Yu.A„ Khokhlov

Zhur. Eksp. i Teoret. Fiz„ ^6, 1906-08 ( 1964)

Soviet Phys. JETP 19, 1284 (1964)

METHOD

Foraushkin

,

ELEM. SYM.

Pt

REF. NO.

78

Linac 64 G1 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N SPC 16 D 16 T0F-D 0-5 90

shown in the figure. The solid curves a, b, and c are the evaporation spectra

iV (E) ~ -rjr exp (--£-)

with the temperature T = 0.48 ± 0.03 MeV for

platinum, 0.84 ± 0.04 MeV for Bi, and 0.98 ± 0.04 MeV for lead.

The solid curve d is the sum of the evaporation

spectrum and the fission spectrum of uranium:

.V (E) - x - T exp (- A) -f- (1 - a) exp

sinh V cot

with the parameters: T = 0.33 ± 0.03 MeV,

Tf = 1.05 ± 0.04 MeV, u = 0.5 MeV, a = 0.49 ± 0 . 01 .

form NBS-418

(REV. 7-1 4-64I U3C OMM.DC 2S010-P64 PHOTONUCLEAR DATA SHEET 328

U.S. DEPARTMENT OF COMMERCE

NATION Ale BUREAU OF STAN OA RD 9
| REF‘ G. Ben-David, B. Arad. J. Balderman, and Y. Phys. Rev. 146 . B852 ( 1966)

METHOD

Schlesinger EL EM. STM.

Pt

REF. NO.

78

Nuclear Resonance Scattering using N,G reactions, 66 Be 3 JDM

RESULT EXCITATION SOURCE OETECTOR

REACTION ANGLE ENERGY TYPE RANGE TYPE RANGE

G,G RLX 5

- 10 D 5-10 NAI-D 5

- 10 135

Fig. 3. Histogram of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemical symbol followed by the neutron numbers of the naturally occurring isotopes. Magic numbers are shown in brackets.

Table III. List of effective cross sections.

Scatterer Energy (MeV) Gamma

source

6 (mb) Energy

Scatterer (MeV) Gamma

source

6 (mb) Sm'« 8.907 Ni 10O Sn 7.01 Cu 110 pr ut 8.881 Cr 9 Nd 6.867 Co 30 La 8.532 Ni 6 Pritt 6.867 Co 3 Te 8.532 Ni 3* Te 6.7 Ni Cu 8.499 Cr 24 La 6.54 12 Zr 8.496 Se 3050 Cd 6.474 Co 110 Zn 8.1 19 Ni 13 Mo 6.44 Hg 25« Sc 7.817 Ni 50 La 6.413 Ti 72 Sc 7.76 K. 90 Mo 6.413 Ti 10 Sb 7.67 V . . .b TI 6.413 Ti 25

Crl 7.64 Fc 40« W ~6.3 Ti . . .b Ni 7.64 Fe T Sb 6.31 Hg

pr ui 7.64 Fe 12* Ti 6.31 Hg 2« T1 7.64 Fe 370* Sn 6.27 75 La 7.634 Cu 7 Pb“* 6.15 Gd Mo 7.634 Cu u Te 5.8 Ni . . .1 Bi»» 7.634 Cu 4 La 6.12 Cl 35 Te 7.528 Ni 664 Pr‘*» 6.12 Cl 110

Bi** 7.416 Se 100 Pt 5.99 Hg 40*-« Bi** 7.300 As 80* TI 5.99 Hg 5«

Pb*** 7.285 Fe 4100 Pb» 5.9 . . .to Cl 7.285 Fe 34 Ce 5.646 Co 17 Pr>« 7.185 Se 80 Bi»» 5.646 Co 55 Ti 7.16 Cu 120 Pb*“ 5.53 70 La 7.15 Mn 50 Hg 5.44 Hg 75« Bi“» 7.149 Ti 2000 Hg 4.903 Co 385

* High-energy component of a complex spectrum.

• A broad scattered spectrum with no observable peak structure.

• There are actually two lines of energies 7.647 and 7.633 MeV having

equal intensities in the iron capture gamma spectrum. The cross section has therefore been corrected, although there is no possibility at present of deciding which line is responsible for each resonance.

* Is probably an Independent levellin the complex spectrum of Nl i

rays on Te.

* Rough estimate.

1 May be inelastic component from 7.528 level In Te.

• The relative line intensities in this case ate due to Groshev and co-workers. — i J No line is known for the source at this energy. form NBS-418 Difficult to resolve among the many source lines present at this energy.

I ,T,rnJ7'^c''«,oto.P,4 PHOTONUCUEAR DATA SHlti 329
I REF' Ao V. Mitrofanova, Yu. N. Ranyuk, and P. V.

J. Nuci. Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

METHOD

Sorokin EL EM. SYM.

Pt

REF. NO.

78

67 Mi 1 HMG

EXCITATION ENERGY

SOURCE OETECTOR

REACTION RESULT TYPE RANGE TYPE RANGEANGLE

G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 = 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

la IcitS Fissionability D

Cross

section <r*, /x/3 Nucleus

Fissionahility D

Cross

section <r», /j.(i

Di 0.11 ±0.01 7.8±0.6 Os 0.0058 ±0.0005 0.37±0.04

Pb 0.050±0.004 3.4±0.3 Re 0.005fi±0.000G 0.35±0.04

T1 0.031 ±0.003 2.1±0.2 Ta O.0045 ±0„0005 0,27±0.03

Au 0.019±0.002 1,25 ±0.10 Ilf 0.0042 ±0,0004 0.25±0„03

Pt 0.012±0,Q02' 0.80±0.08 1

Fig. 2. Photofission fragment yields as a function of Z*/A. Tht

ordinates are values of <Tq in units of cmx

0 form NBS-418

(REV. 7*14-04) USC OMM-OC 26010-P64 RHOTONUCLEAR DATA SHEET 330

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF‘ Yu. N. Ranyuk and P. V.

J. Nucl. Phys. (USSR) jji Sov. J. Nucl. Phys. j,

METHOD

Sorokin ELEM. SYM. A Z

, 37 (1967)

26 (1967) Pt

REF. NO.

78

67 Ra 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,F ABX THR-260 C 100-260 EMU1

DST

Angular distribution isotropic to 5 %.

Table 11

MeV

Cross section per equivalent y quantum, 10*** cm*

Bt Pb Aa Pt

100 0.07+0,005 0.017+0.002 0.003+0.0005 0.0012 +0.0002

120 0.15+0.01 0.032+0.003 0.014+0.001 0.0035+0.0003

140 0.20+0.01 0.054+0.004 0.020+0.001 0.0053+0.0006

150* 0.61+0.12 — — —

1G0 0.31+0.01 0.006+0.005 0.037+0.001 0.012+0.0005

180 0.40+0.02 0.13+0.01 0.055+0.001 0.015+0.001

180* 0.68+0,09 — — _

200 0.62+0.02 0.20+0.01 0.082+0.002 0.031+0.001

200* 1.3 +0.24 — 0.31+0.09 _

200 •• 0.7 —

220 0.83+0,03 0.28+0.01 0.108+0.003 0.039+0.001

240

240 •• 1.22+0.03

1.5 0.36+0.01 0.146+0.003 0.063+0.001

250* 1.78+0.22 — 0.33 ±0.07

260 1.50+0,04 0.50+0.02 0.180+0.004 0.085+0.002

• From ®.

•• From

Fig. ». Pbotofission cross sections. O— Bi, •— Pb, A — Au, A—

PL The ca-res were calculated from smoothed field corves.

form NBS-418

(REV. 7*14-64) use OMM-DC 200 1 0* P64 PHOTONUCLEAR DATA SHEET 331

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
REF' J c W. Jury, J. S. Hewitt, and K. G. McNeill

Cam Jo Physe ^6, 1823 (1968)

EL EM. SYM.

Pt 78

method

68 Ju 1 EGF

reaction RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.N NOX THR-27 C 27 THR 5- DST

W(9) - a

o + a1P1 + a2

P

2

TABLE I

Target element Z Energy Go* tfi/tfo tfj/'tf0 Vanadium 23 32 640 ±50 0.11+0. 10 -0.09 + 0.11 Chromium 24 22 365 ±39 0.02 + 0.08 0 00^0. 10 Manganese 25 22 450 ±33 • 0.07-0.05 -0. 1 1 -0.06

Bromine 35 27 874+54 0.05 + 0.06 -0.15-0.08

Molvbdenum 42 610±60 0.09 + 0.05 -0.35-0.06

Ruthenium 44 27 1100+25 0. 12 + 0.02 -0.29 + 0.03 Rhodium 45 27 1270 + 47 0.06 + 0.03 -0. 14-0.03

Palladium 46 27 1350 ±29 0.26 + 0.02 -0. 12-0.02

Antimony 51 27 2140± 62 0.04 + 0.08 -0.25 + 0. 1

1

Lanthanum 57 27 1 940 — 70 0.12 + 0.10 — 0. 52-0. 14 Praseodymium 59 30 1800 — 58 0.20-0.08 —0.40-1-0.09

Platinum 78 27 2600+52 0.17 + 0.02 -0.15-0.03

Lead 82 22 2274+59 0.08 + 0.08 -0.46 + 0.09

•The yield per mole per 100 r was normalized lo a yield of 2274 for the lead sample at the same energy.

form NBS-418

(REV. 7-14-04) USC OMM-OC 26010-P04 PHOTONUCLEAR DATA SHEET 332

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
Yu. N. Ranyuk , V. M. Sanin , P. V. Ukr. Fiz. Zhur. 14, 408 (1969)

METHOD

Sorokin

ELEM. SYM. A Z

Pt

REF. NO.

78

69 Ra 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F ABX 35-140 G 40-140 TRK-I 4PI

Yields of nuclear fission reaction for Bi, Au and Pt by bremsstrahlung were measured by means of solid state track detectors in the energy range from 40 to 140 MeV.

The fission threshold for these nuclei is higher than the giant resonance energy which:

allowed total photofission cross-sections to be calculated by the yiefd curves. A rapid increase of the cross-sections with the photon energy testifies to the preference of the statistical model within which the fission thresholds of target nuclei were

calculated. The results of the present experiment may be used to obtain information on the

ohoton interaction mechanism in the energy region between the giant resonance and the- threshold of meson production where this problem is still obscure.

Phc. 4. BiAHomeHHH amHnbHof i HeiiTpoHHoi iiihphh: — aaHi podonr [5] ;uin

cyMiuxi i30ToniB Bi®7

i Bi”®.

Puc. 2. Bhxoah ynaMKiB nofliay: 0—Aaui naHoi podOTH, — flam po6otk [3J. CyuijibHi KpHBi oaepwaHi niaroHKOfo 3a $op- Myaoio (4).

form N3S-4I8

(R EV. 7-1 4-641 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 333

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. E„ Hayward, W. C. Barber, and Jed Sazama

Phys. Rev. C8, 1065 (1973)

EL EM. SYM.

Pt 78

METHOD REF. NO. 73 Ha 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

$ G.G RLY 15 D 15 NAI-D 90

(15.1) (15.1)

POLARIZED PHOTONS

TABLE H. Results.

doVdOj, daL/dUF

Target Arbitrary units Vr 0 liDCM)

Cd 0.042 ± 0.028 0.39±0.05 0.11 ±0.07 0.09±0.07 0.19 SB 0.084 ± 0.036 0,65 ± 0.06 0.13± 0.06 0.11 ±0.06 0.07 Ta 0.24 ±0.10 1.47 ± 0.14 0.16 ±0.07 0.14 ±0.07 0.20 W 0.52 ±0.10 1.66± 0.12 0.31 ±0.07 0.29 ±0.07 0.20 Pt 0.23±0.08 1.94 ± 0.13 0.12 ±0.04 0.10 ±0.04 0.08 Au 0.39 ±0.11 2.08 ±0.15 0.19±0.06 0.17 ± 0.06 0.07 Bi 0.10±0.15 2.65±0.2P 0.04 ±0.06 0.02 ±0.06 0

form N3S-418

(R EV. 7-1 4-94) USC OMM»N BS°0 C

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 334
A. Veyssiere, H. Beil, R. Bergere, P. Carlos, A. Lepretre,

A . De Miniac

J. Phys. Lett. 36, L267 (1975)

method

ELEM. SYM.

Pt

75 Ve 5

78

egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE range TYPE RANGE

G,N* ABX 8- 22 D 8- 22 MOD-T 4PT

G,2N** ABX 13- 21 D 8- 22 MOD-I 4PI

Abstract. — Partial photoneutron cross-sections [0(7, n) + e(y, pn)], and <7(7, 2n) of W, Re, Ir, Pt and Hg were measured by means of monochromatic photons of 8 MeV ^ E < 22 MeV so as to study the giant resonance. The experimentally observed evolution of the shape of the GDR, as one

proceeds from permanently deformed prolate nuclei (W and Re) towards oblate or even triaxial gamma unstable nuclei (Pt), corresponds to the theoretical predictions of the dynamic collective

* 1029+

**1030

model.

(g.n> CROSS-SECTIONS

E, (MeV)

FlO. 1 . — Sections efficaces partielles 0(7, n) + aiy, pn) des noyaux W, Re, Ir, Pt, Hg.

CROSS SECTIONS

FlO. 2. — Sections, efficaces partielles afy, 2n) des noyaux W,

Re, Ir, Pt, Hg.

form N3S-418

(R EV. 7-’ 4-641 USC OMM-N BS-D C

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 335
500

400

300

200

100

0

100

0

toe

o

100

0

too

0

Fig.

fOTRL CROSS- SECTIONS

gj CM* VS

3. —- Sections efficaces totales ffj{£) des noyaux W, Re,

If, Pt, Hg.

E CM*VS

t Fig. 4. — Comparaison des sections efficaces totales expenmentales

<rt(E) des noyaux W et Pt avec les predictions du modele collectif dynamique [12] positionnies de fa?on i faire coincider les energies moyennes observees et calculies de la RGD.

336
REF. G. Bologna, V. Bellini, V. Emma, A.S. Figuera, S. Lo Nigro,

C. Mi lone and G.S. Pappalardo

II Nuovo Cimento 35A, 91 (1976)

EL EM. SYM.

Pt 78

METHOD

76 Bo Vj egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE G,F RLX 220-500 D 220-500 TRK-I 4PI

COHERENT BREMS

12 1

1

1 1

1

1

1 1 1 1 I

l

1 v> .

.

, * 4-0 . 1

a) b)

1 i 1 i 1

1

1

1 1 1

1 " 1

1 1 1 l

1

-

'Cl d)

1 1 i 1

i . l 1 ! .

d

L 0 3L

d

-it''

o»

200 300 400 500 200

fr.(MeV) 300 400 500

Fig. 6. - Photofission yields per equivalent quantum of Bi, Pb, Au and Pt as a function

of the first peak energy k, of photons. The dots are the experimental data; the dashed

curves represent the yield functions estimated as described in sect. S. a) Bi (y, f), 6) Pb (y, f), c) Au (y, f), d) Pt (y, f).

over

FORM MSS-41S

IRCV. 7-14-641 USC QMM-N 83*0 C PHOTONUCLEAR DATA SHEET 337

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
r

338
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. SYM.

Pt 78

METHOD REF. NO.

76 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RAN GE TYPE RANGE

G,F ABY THR-999 C 999 TRK-I 4PI

-

Table 1 Measured values of it, at £= 1000 MeV and deduced values of <rt assumed constant from E0 to 1000 MeV

999 = 1 GEV

Element z

2/a

(mb)

£o (MeV)

<tk (mb)

Bi 3196 12.3 ±0.6 200 7.6 ±0.6 Pb 32.45 5.4 ±0.4 220 3.6 ±0.3

T1 32.10 4.1 ±0.3 230 2.8 ±0.3 Au 31.68 2.0 ±0.15 240 1.4 ±0.2

pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10* 1 Re 30.21 (3.7 ±0.3) x 10‘ 1 280 12.9 ± 0.3) x 10' 1 W 29.78 (3.5 ±0.3) x 10" 1 290 (2.8 ±0.3) x 10- 1 Ta 29.45 (3.3 ±0.3) x 10

-1 300 (2.7 ±0.3) x 10" 1 Hf 29.04 (1.7±0.2)x 10* 1 310 (1.4 ±0.2) x 10" 1 Yb 28-31 (1.3 ±0.1) x 10" 1 330 (12±0.1)x 10~ 1 Tm 28.18 (7-5±0.8)x 10 -2 335 (6.8 ± 0.8) x 10“ 2 Ho 2721 (3.6 ±0.4) x 10- 2 355 (3.5 ±0.4) x 10" 2 Dy 26.80 (2.6 ±0.3) x 10' 2 360 (2.5 ±0.3) x 10 -2 Tb 26.58 (2.5 ±0.3) x 10- 2 370 (2.5 ±0.3) x 10- 2 Gd 26.04 (1.6±0.2)x 10

-2 3S0 (1.7±0.2)x 10" 2 Sm 25.56 (l-3±0.2) x 10" 2 390 ( 1 .4 ±02) x 10 -2 Nd 24.96 (92 ±0.9) x 10" 5 405 (1 ±0.1) xlO-2 Ce 24.00 (8 ±0.9) x 10- 3 420 (9 ±1 ) x 10 -3 La 23.39 (8.4 ±0.9) x 10" 3 430 (1 ±0.1) x 10" 3 Sb 21.36 (1.2±02)x 10" 2 460 (1.5 ±0.3) x 10" 2 Te 21.19 (8.8 ±1 ) x 10~ 3 465 (1.2 ±0.2) x 10- 2 Sn 21.06 ( 1.3 ±0.2) x 10' 2 465 (1.7±0.3)x 10 -2 Cd 20.49 (1.7 ±0.3) x 10' 2 470 (2.2 ±0.4) x 10" 2 Ag 20.47 (2 ±0.3) xlO' 2 470 (2.6 ± 0.4) x 10" 2 Zn 13.76 (2 ±0.4) x 10' 1 515 (3 ±0.6) x 10~ 1 Cu 13.44 (2.4 ±0.5) x 10' 1 515 (3.6 ± 0.8) x 10-' Ni 13.35 (24 ±0.5) x 10' 1 510 (3.6 ±0.8) x 10" 1 Fe 1210 (3 ±0.6) x IQ" 1 510 (4.4 ± 0.9) x IQ

-

1

Fig. 2. Nuclear fissilities as a function of Z''IA. Experimental points: solid circles represent our data;

squares, the data from ref. 2

): open circles, the data from ref . i. and crosses, the data from (p.f) experi- ments20

). The straight line is the best fit calculated from our data for Z

1 A > 26. The dashed curve is the curve VI calculated by Nix jod Sjs*i i2

L form N3S-418

(R EV. 7.1 4- 64) USC OMM-N BS-DC

4A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6., 512 (1968) . 7T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

12

J.R. Nix et al., Nucl. Phys.

81, 61 (1966)

.

20

N.A. Perifilov et al., JETP

(Sov. Phys . ) 14 , 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol • 2 (IAEA) Vienna,

1965, p.283

.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATASHEET 339
* i« -


Yu. K. Shubnyi and Yu. A. Lysikov

Izv. Akad. Nauk SSSR Ser. Fiz. 36, 2531 (1972)

Bull. Acad. Sci. USSR Phys. Ser. 36, 2199 (1972)

METHOD

ELEM. SYM. A

Pt 194 78

REF. NO.

72 Sh 13 hmg

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G ABX 99*328 D 99*328 SCD-D UKN

328 keV a= (3. 5± .5) -10 -26 cm2 -sr

-1

98.7 keV a= (1.8±.3) •10~2 ®cm2, sr~*

* ENERGY IN KEV

328 keV r 0y= (5.1±.7) -lO' 11 sec

194

Fig. 1. Spectrum of the scattered radiation of Ir for a source temperature

of 1200° C. 1) Scattering by Ta; 2) scattering by Pt.

form N3S-418

(R EV. 7-1 4-64> use O MM* D C 20010-P64 PHOTOHUCLEAR DATA SHEET 343

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF- A.M. Goryachev and G.N. Zalesnyi

Yad. Fiz. 27, 1479 (June 1978)

Sov. J. NucT. Phys. 27, 779 (June 1978)

ELEM. SYM.

Pt 194 78

METHOD REF. NO.

78 Go 3 hmg

11/17/80

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABX 8(8.4) -21 C 8-21 BF3-I 4PI

Photoneutron yield curves have been measured for the isotopes 1,u”lr and ‘ 1,5 in the . . . . . bremsstrahlung beam of a betatron in the energy range $-21 MeV with a 0.2-MeV step. For the n mul tiplicity measurement

isotopes we have also measured the photoneutron multiplicity curves. The measurements were made on-line with a computer. The cross sections were calculated from the yield curves by the PenfoldLeiss method with a 1.0-MeV step. The multiplicty curves were used to separate the contributions of (y.n) and (y.2 n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated cross sections, deformation parameters, and average energies. The existence of oblate deformation in

these nuclei is not confirmed by the analysis of the measured cross sections.

FIG. 1. Photoabsorption cross sections for the isotopes

*9t,i9Jjr mjd 191.195.1 W.198 pto xhe vertical lines, whose length

is equal to two standard deviations, show die experimental

cross section. Above the (y ,2n) threshold the photoabsorption cross section is designated by circles. TABLE n. Parameters of photoneutron multiplicity curves.

Nucleus «. MeV** w ‘'If 4. M*V w VII

'“Pi 6.3*07 0 1.07 21.16“ 0.37*0.03 1.13 '"Pt 7.9*05 0 0.98 21.19“ 029*002 1.04 'Pt 02*0.6 0 1.1S 20.2 • 0.28*0.03 121 Note. Here / is the number of degrees of freedom; the asterisks denote level-density parameter values taken from

Ref. 16. FORM NU5-4I6

(R EV. 7-1 4-841 USC OMM-N 8S-DC

TABLE m. Integrated cross sections.

,9, Ir ‘•If -Pt - ‘•Pt

aim* 2757*23 2835* 30 2861*27 2797125 2944*21 2813*32

»mt<T. 2n)„

. - - 626*9 744*9 1023*14 MeV-mb 022 025 048

Om|L. Ma VhhO- 3741 3899 3739 3766 3884 3841

O-mtLli0NZ/A 1.38 1.40 1 34 1.34 1.38 145

u„|. mb 199*24 206*2 210*2 204*3 213*24 236*2

«-i 3-,'> 0.181 0.184 0.187 0.180 0.187 0204

a_ 2

. MeV*1

- mb 14.83*0.15 15.33*0.13 15.35*0.14 15.39*0.12 15.96*0.11 !5.43*0.I8

0.00234 0.00238 0.00236 0.00235 0.00241 0.00229

“Calculated In the case of validity of hypothesis 2) on the basts of the formula L = (jr/2) (<t, Tt + ^Tj)

.

a

int corrected f° r neutron multiplicity

TABLE IV. Parameters of Lorentz curves.

Nudeus £,.MeV Tu MeV a,, mb £*MeV r,. MeV at. mb 0. P./

/*. r.

’"Ir 1245*0.04 2.70*0.07 294*8 14 82*0.09 5.30*021 299*10 04

"Mr 13.01*0,04 2.61*0.06 317*10 14.77±0.09 6.44*0.31 257*12 04

'•PI 12.96*0.04 249*0.07 306*10 1444*0.10 5.33*022 299*11 04

'"Pt 12.99*0.05 370*0.07 296*10 1449*0.11 5.46*0.27 293*15 0.5 'Pt 13.07*0,05 2.72*0.08 303*11 14 40*0.12 5.97*029 276*13 04 'Pt 1306*0.05 247*0.09 284*12 14.34±0.14 6.27*044 2GO±t6 04 Pt 1348*0,02 4.45*0.06 514*8 - - - -

TABLE V. Average energies.

Nucleus E*f*«V E„A‘/> Nucteus E«.MeV* eua‘I' r «a*i.

Mr 14.16 81.6 34.0 pt 14.06 81 j 319 Mi| r 1418 £10 34.1 'pt 13.98 81.1 33.6 •"Pt 14.01 81.1 337 '•pt 1391 81.1 336

“Calculated in the case of validity of hypothesis 2) according to the formula E„= a/3)E, + <2/3)£j.

PHOTONUCLEaR data sheet 344

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
n»

FIG. 2. Multiplicity of photoneutrons for the iso- topes «M.i96I I98pt> The

length of the vertical lines

is equal to two standard

deviations. The curves

are a fit with the parameters given in Table II.

345

.

-i£F. ELEM. SYM. A K. N. GelLer, J. Halpern, and £. G. Muirhead

Phys. Rev. 118 . 1302-12 (i960) Pt 195 78

method

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

EXCITATION ENERGY

SOURCE OETECTOR

REACTION RESULT TYPE RANGE TYPE RANGE

ANGLE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary and comparison of neutron serration energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccnter-of-mass system in Mev.

Krnclion No. runs Present results Other results Method Reference

Pt'Mf-y.wJPt1** 2 6.205±0.044 6.09 ±0.06 mass data q

6.07 ±0.04 Ptl "(n,7)Pt“‘ e

« W. H. Johnson. Jr., and V. B. Bhanot. Phys. Rev. 107, 6 ( 19s7) .

->u N3S-418

T. I 4 . «4» U.S. DEPARTMENT OF COMMERCE

_ _ NATION*'. BUREAU OF ST*MO*ROS

?iiwtCowC*.^A'' » A SrlciiT 349
I' Yu. K. Shubnyi and Yu. A. Lysikov

Izv. Akad. Nauk SSSR Ser. Fiz. 36, 2531 (1972)

Bull. Acad. Sci. USSR Phys. Ser. 36, 2199 (1972)

METHOD

195 78

hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, G ABX 99*328 D 99*328 SCD-D UKN

98.7 keV r 0 « (1.2±.2) -10"9 sec *ENERGY IN KEV

195

Pt

b) scatterform N3S-418

(R EV. 7-1 «-««) USC OMM-OC 28010-P8* PHOTONUCLEAR DATA SHEET 350

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANQAROJ
REF - A.M. Goryachev and G.N. Zalesnyi

Yad. Fiz. 27, 1479 (June 1978)

Sov. J. Nucl . Phys. 27, 779 (June 1978)

ELEM. SYM. A

Pt

METHOD REF. NO.

78 Go 3

i z

195 78

hmg

11/17/80

REACTION

G.XN ABX

EXCITATION ENERGY

6 ( 6 . 0-21 8-21

DETECTOR

BF3-I 4PI

Photoneutron yield curves have been measured for the isotopes 1,u,1Ir and in the bremsstnhlung beam of a betatron in the energy range 8—21 MeV with a 0.2-MeV step. For the H multiplicity mSflSUl^BfflBnt

isotopes we have also measured the photoneutron multiplicity curves. The measurements were

on-line with a computer. The cross sections were calculated from the yield curves by the Penfold- r-i« method with a 1.0-MeV step. The multiplicty curves were used to separate the contributions of (y,n) and (y,2n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated

cross sections, deformation parameters, and average energies. The existence of oblate deformation in

thrv* nuclei is not confirmed by the analysis of the measured cross sections.

FIG. 1. Photoabsorption cross sections for the isotopes

tn.tssfj. aud ts«,ns,i9«,mpt. The vertical lines, whose length

Is equal to two standard deviations , show die experimental

cross section. Above the (y,2n) threshold the photoabsorption cross section is designated by circles. TABLE n. Parameters of photoneutroo multiplicity curves.

Nud«u b.tfaV1 w *'lf «. w xvr

mpt 63*07 0 1.07 21.16* 0-37 ±0.03 1.13 "•Pt 7.9±05 0 0.98 21.19* 029*002 1.04 pt 63*06 0 1.16 203* 0.28*0.03 1.21 Note. Here / Is the number of degrees of freedom; the asterisks denote level-density parameter values taken from

Ref. 16. eorm N3S-418

1R EV. 7-1 4-641 USC OMM-N BS-DC

TABLE m. Integrated cross sections.

’•ir —If ’"Pt -Pt —Pt -Pt

MeV«mb 2757*23 2835* 30 2861*27 2797125 2944*21 2613*32 <W>'- 2*). MeV-mb

- 626*9 * 744*9 1023*14 - - 032 035 0.36 ota,L. HiV-mb* 3741 3899 3759 3766 3884 3841 omfZ/60 NZ/A 1.36 1,40 1.34 1.34 1.38 135 mb 190*24 205*2 210*2 204*3 213*2.5 236*2

a A-1'- 0.181 0.184 0.187 0.180 0.187 0304

14.85*0.15 15.33*0.13 1535*0.14 15.39*0.12 15.96*0.11 15.43*0.18 0.00234 0.00238 0.00236 0.00235 0.00241 0.00229

•Calculated In the cast of validity of hypothesis 2) on die basis of the formula <rm L= (ir/2) (o, T, + <r2 T2

)

.

cr.j nt

corrected for neutron multiplicity

TABLE IV. Parameters of Lorentz curves.

Nudeut Ti.MeV a,, mb £»MeV r„ MeV ou mb a, r,/ /<h r,

"Mr 1235*0.04 17010.07 294*8 14 82*0.09 5.30*031 299*10 03

'"Ir 13.01*0.04 2.6110.06 317110 14.77*0.09 6.44*0.31 257*12 03

'"Pt 1196*0.04 239*0.07 306*10 14-54*0.10 533*0.22 299* M 0.5 'Pt 12.99*0,06 170*0.07 290*10 1439*0.11 5.46*0.27 293*15 03 'Pt 13.07*0.05 172*0.08 303*11 14.40*0.12 5.97*039 276*13 0.5 'Pt 13.06*0.06 237*0.09 264*12 14.34*0.14 6.27*034 200*16 0-5 '•Pt 1338*0,02 4.45*0.06 514*6 - - -

TABLE V. Average energies.

Nudeut «»>JfcV*- Nudetu

"Mr 14.16 81.6 34,0 'pt 14.06 81.5 519

'“Ir t4.!8 82.0 34.1 pt 13.96 81.1 53.8 '•pt 14.01 61.1 33.7 pt 1391 81.1 333

•Calculated in the case of validity of hypothesis 2) according to die formula E„ = (l/3)£, + (2/3)£2

.

PHOTONUCLEAR DATA SHEET 351

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OP STamOAROS
I'

UK

FIG. 2. Multiplicity of photoneutrons for the iso- topes The

length of the vertical lines

is equal to two standard

deviations. The curves

are a fit with the parameters given in Table H.

352
_

du dM. j f M. .\. . Jeiier, J. Halpern, and E. G. Muirhead

?hys. Rev. 118 , 1302-12 (i960) Pt 196 78

'METHODBetatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

result EXCITATION SOURCE DETECTORREACTION ENERGY TYPE RANGE TYPE RANGE angle

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary and comparison of neutron sejjaration energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccntcr-of-mass system in Mev.

ItmcliiHi No. runs Present results Other results Method Reference

Pt '*fv »)Ptu‘ 2 8.29 ±0.14 7.91 ±0.06 mass data q

V ’ ' 7.920±0.012 Pt“‘(n,T)Pt1M e

< W. H. Johnson, Jr., and V. B. Bhanot. Phya. Rev. 107, 6 (19S7).

'pm NBS-418

. F. 1 ,. «4I

lM« t f Jf, . . I

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STAN0ACJO3 PiiOTCNUCL 2 A a Da » A SricuT 355
Ref.R. E. Chrien, H.H. Bolotin, H.Palevsky Elem. Sym. A

Phys.Rev. 127 . 1680 (1962)

Method Reactor, fast chopper (Chalk River)

Pt 196 78

Nal

Ref. No. 62Chl 0Cr

Reaction EorAE

(n,Y)

En

= (eV)

11.9

19

68

113

121

ad E J

rr Notes

•j® 0 ground state

Relative transition probabilities

are given.

(i4o)

(152)

189

223

277

Fig. 5. The decay Table I. Pt19 ® transition probabilities. scheme for Pt198

.

Level 7.92- MeV 7.6-MeV 7.26- MeV

(eV) transition transition transition Sum

11.9 2.84 ±0.12 0.43 ±0.27 <0.24 3.33 ±0.21

19 0.57 ±0.12 0.28 ±0.18 0.62 ±0.18 1.69 ±0.16

68 1.83 ±0.14 2.14 ±0.22 0.26 ±0.22 4.59 ±0.19

113 0.62 ±0.10 0.85 ±0.17 0.62 ±0.18 2.39 ±0.15

121 1.48 ±0.14 0.30 ±0.22 0.18 ±0.18 2.05 ±0.18

140 0.28 ±0.09 0.09 ±0.14 2.85 ±0.21 4.08 ±0.15

152 0.29 ±0.12 0.28 ±0.22 0.53 ±0.27 1.29 ±0.20

189 1.02 ±0.16 0.43 ±0.27 0.98 ±0.27 2.78 ±0.23

223 1.39 ±0.32 3.65 ±0.66 1.75 ±0.71 7.79 ±0.57 252 0.04 ±0.12 0.18 ±0.16 0.56 ±0.19 0.97 ±0.15

277 1.60 ±0.29 0.22 ±0.57 0.22 ±0.41 2.13 ±0.44

296 0.03 ±0.08 1.87 ±0.19 0.11 ±0.21 2.29 ±0.16 Mean 1.000 ±0.048 0.893 ±0.091 0.723 ±0.088 2.948 ±0.077

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-I-S3I USC OMM® DC 10B38-PS3 PHOTONUCLEAR DATA SHEET 356
REF.

METHOD

A.M. Goryachev and G.N. Zalesnyi

Yad. Fiz 27, 1479 (June 1978)

Sov. J. Nucl. Phys. 2J_, 779 (June 1978)

ELEM. SYM. A

Pt

REF. NO.

78 Go 3

195 78

hrng

11/17/80

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 7(7.9) -21 C 8-21 BF3-I 4PI

-

Photoneutron yield curves have been measured for the isotopes 1,u,3

Ir and l *4 l,51,* 1 ’,Pt in the bremsstrahlung beam of a betatron in the energy range 8-21 MeV with a 0.2-MeV step. For the n multipl icity measurement

isotopes we have also measured the photoneutron multiplicity curves. The measurements were —

made on-line with a computer. The cross sections were calculated from the yield curves by the PenfoldLeiss method with a 1 .0-MeV step. The multiplicty curves were used to separate the contributions of (y, n

)

and (y,2n) reactions. On the basis of the photoabsorption cross sections we have calculated the integrated

cross sections, deformation parameters, and average energies. The existence of oblate deformation in these nuclei is not confirmed by the analysis of the measured cross sections.

FIG. 1. Photoabsorption cross sections for the Isotopes

lM.iSSfr ajjd !S4,i95,i9«f i9«j>t_ The vertical lines, whose length

is equal to two standard deviations, show the experimental

cross section. Above the (v,2n) threshold the photoabsorption cross section is designated by circles. TABLE n. Parameters of photoneutron multiplicity curves.

Nucleus a, MeV*1 W *’// «. MeV1 w V/t

"•pt 62*0.7 0 1.07 21.16* 0.37*0.03 1.13 pt 7.9*06 0 0.98 21.19* 0.29*0.02 1.04 «pt liras 0 1.16 202* 0.28*0.03 121 Note. Here / is the number of degrees of freedom; the asterisks denote level-density parameter values taken from

Ref. 16. form N3S-418

(R EV. 7-1 4-64) USC OMM-N BS-0 C

TABLE m. Integrated cross sections.

“ir '“If Pt ~Pt

a*,. MeV-mb 2757±23 2835* 30 2861*27 2797125 2944*21 2813*32 <WT- *». - - 626*9 - 744*9 1023*14 MeV-mb 022 0.25 0.36 MeV-mb* 3741 3899 3739 3766 3884 3841 O^liONZlA US 1.40 1.34 1.34 1.38 1.35 a.j. mb 199*22 206*2 210*2 204*3 213*2.5 236*2

a., a-*'- 0.181 0.184 0.187 0.180 0.187 0204

a MeV-1

- mb 14.83*0.15 15.33*0.13 1335*0.14 15.30*0.12 15.96*0.11 15.43*0.18 a-,4-"- 0.00234 0.00238 0.00236 0.00235 0.00241 0.00229

'Calculated in the case of validity of hypothesis 2) on the basis of the formula Ja 1 = (ir/2) (cr

t T, +<T2 r2).

a

1

- nt

corrected for neutron multiplicity

TABLE IV. Parameters of Lorentz curves.

Nucleus *..MeV IV MeV a,, mb MeV r,. MeV ot. mb a, r./

f<h r,

»'Ir 1285*0.04 27010.07 294*8 14 82*0.09 5.30*021 299*10 0.5 “!r 13.01*0.04 2.6110.06 317110 14.77*0.06 6.44*0.31 257*12 0.5 “Pt 1296*0.04 259*0.07 308*10 14.54*0.10 523*022 299*11 02 “Pt 1299*0.05 270*0.07 296*10 14.59*0.11 5.46*0.27 293*15 0.5 “Pt 13.07*0.05 272*0.08 303*11 14 40*0.12 5.97*0.29 276*13 0.5 '"Pt 13.06*0.06 2.87*0.09 284*12 14.34*0.14 6.27*024 200*16 06 “Pt 1258*0.02 4.45*0.06 514*6 - - - -

TABLE V. Average energies.

Nucleus eMa

"‘ Nucleus .MeV* E*(AV. Ek,*‘u

“Ir 14.16 81.6 34.0 “Pt 14.06 816 329 “!r 14.18 82.0 34.1 ‘"Pt 13.96 81.1 33.6 “Pt 14.01 81.1 33.7 “Pt 1291 81.1 332

'Calculated in the case of validity of hypothesis 2) according to the formula £„= (1/3)E, + (2/3)E2

.

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU C F SUnDABOS

PHOTONUCLEAR DATA SHEET 357
UK

FIG. 2. Multiplicity of photoneutrons for the iso- topes IM.t9S,198pt_ The

length of the vertical lines

is equal to two standard

deviations. The curves

are a fit with the parameters given in Table 0.

358
A=197

GOLD

Z=79

The symbol Au for gold comes from the Latin aurum and is

probably the first metal discovered by man. The goldsmith's

art dates from at least 4000 B. C. in Mesopotamia and it

then spread throughout the acient civilizations near the

eastern Mediterranean and Egypt. It occurred in the Asian

civilizations as well as in the cultures of Peru and Mexico.

In the later years of history, alchemy, or the search for

the Philosopher's Stone which would convert base metals to

gold, contributed much to our early understanding of

chemistry, medicine, and metallurgy.

Estimates have been made to show that the greatest part of All all the gold won from the earth in the last 10,000 years A=197

could still be accounted for in private and government

vaults and in the wide private distribution of jewelery and

artifacts throughout the world. No other possession is so zealously and effectively guarded.

359

Au

A=197
1

.
Ref. W.K. Dawson

Can. J. Phys. 1^+80 (1956)

Method Synchrotron; proton yield, spectrum; angular distribution;

nuclear emulsion; ion chamber.

Elem. Sym.

Au 197

Ref. No. 56 Da 2

79

NVB

Reaction E or A E S*

dE J n

- Notes

Au 197 (y,xp) 70 Yield = 6.8 x 10 protons (up to 17

MeV)/r-mole ±30fo for

70 MeV bremss.

Fir. .5. Theenergv distribution m phocoprui m the lusis ol the theories outlined in 'he rev

t

Fir.. D. The angular distributions of photoprotons oi v arious energies from gold. Standard

deviations arc shown. I'he smooth curve lor the higher cnergx group'll.0^ £ P < 17.0 Mcv

Id shown here cannot Ik? explained w«w calculated from conation 'O'

form NBS-418

(8-1-93) USC OMM-OC 183S8-P63

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 361
Ref. E.G. Fuller, E. Hayward

Phys. Rev. 101, 692 (1956)

Elem. Sym.

Au 19?

Ref. No.56 Fu 1

79

Method Betatron; photon scattering; Nal spectrometer

NVB

Reaction E or AE

S'

d E J ” Notes

Au 197

(y,7) Bremss. Detector at 120 .

Cross sections given here are l^o too

high due to erroneous cosp factor in

denominator of Eq. 5* [See footnote

8 in Phys. Rev. 106, 993 (1957) ]

t”

i —

n

-u

r ,T + +; ii! I

L I

T

: T

T !

i! i +

Fig. h. The elastic scattenne cross sections for Sn, I. Au. Pb, Bi. and l'. The points at 17 6 Mov are those ot Stearns.*

* E. R. Gaerttner and G. L. Veater, Phys. Rev. 76, 363 (1949).

6 Drcssel, Goldhaber, and Hanson, Phys. Rev. 77, 754 (1950).

4 M. B. Stearns, Phys. Rev. 87, 706 (1952).

form NBS-418

( 8 - 1-831 USCOMM-OC 18S90-P83

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 162
Ref. B.I. Ga -lov, L.E. ^azareva

Zhur. Eksp. i Teorec. Fiz. ^0, 855 (1956);

Soviet Phys. JETP 87 1 ( 1957)

Elem. Sym.

Au 197

Method y-Bremsstrahlung; synchrotron; BF, counter

D

Ref. No. 56 Ga 1 EGF

Reaction E or A E ad E J n Notes

Au

1 ^(Y,xn)

Au1 ^)

7.5-27

7.5-27

lk.2

Ik.

2

6.0

^.7

4.37 MeV-b

3.4-9 MeV-b

(5<a'0

TABLE I. Fundamental characteristics of photoneutron cross sections.

E. Element E„nn max

a n max Half width

in mev

Jan (E)dE E

\<J„(E) dE; an max £

in mev in barns

in mev-barns

Copper 17.2

16.3 0.126 0 . 0.S2 ti

0.93

0.66

7.4

8.1 Cadmium 16.0 0.270 6 . \ 2.28 8.4

Iodine 13.5 0.2S8 6.0 2.35 8.2 Tantalum r.,5 0 »r.2 li.X 3.87 8.6 Cold 14.2 0.571 6 0 \ 37 7.6 Thallium 14. IS 0.653 5 » 4.99 7.6 Bismutn 13.0 0 ’•57 5 .

9

3.96 7 4 Thorium 1 »

. 706 6.33 8.0

L" r an : urn

l. IS 6.8 12.5 10.8

£T(e 7

Energy (MeV)

I

!

i

1

TABLE II. Threshold of photoneutron reactions ( mev

Element ! ( t . n ' IT. 2n» (T. 3m (T. <in)

j Cadmium j 6.7 14.6 23.0 >30

Iodine ! 9.4 16.2 26.0 32.9 Tantalum ! 7 6 13.9 21 .0 28.2

Colli 1 8.1 14.9 23.9 >30

Thallium 7 14.0 2* 8 Bismuth 1 7 14.2 22.5 — ! 6

TABLE in. Characteristics of the cross section of absorption of y-quama by nuclei.

Ele- ment £

res

in mev <r(£=£ ) y

.

. re »

id barns 1 1

*•

\n r dE E

in aiev-bim

\ a dEjO.CS X

E x (ZjyiA)

s

?•y®Y

!E) dE E

iE')d£ E

n

,0 xl03

15.6 0.263 5.1 1.76 1.06 0,111 0.00745 1,26

15.5 0,288 * 1.86 1,00 0,117 0,00768 1,16 Tantalum 13.9 0.448 2 , > 4 1 .05 0,190 0,0139 1,15 Gold 14.2 0,571 3.49 1.23 0.244 0,0182 1,23 Thallium 14.0 0,648 3.77 1,28 0.266 0.0200 1 .25 Bismuth 13.8 0, 537 3.12 1,04 0.230 0,0178 1.16

Figure 2 : Photoneutron eross section

om computed from the yield curves by

the "photon difference method."

"+" — cross sections obtained in

Ref 8 [Montalbetti, Katz and Goldemberg, Phys. Rev. 659 (1959)];

-- cross sections obtained in

I Ref. 9 [Nathans and Halpern Phys.

Rev. ^37 (195^)]. Curve is presented for the cross section of yquanta, computed from the statistical

theory of nuclei.

form NBS-418 UICOMM'OC l«B88-P«3 PH0T0NUCLEAR DATA SHEET 363

u.s. department of COMMERCE

national bureau op stanoaros
See

B.G. Chidley, L. Katz, S„ Kowalski

Gan. J. Phys. ^6, ^0? (1958)

EL EM. SYM. A

| Z Au 197 79

Betatron

REF. NO.

58 Ch 2 NVB

• E ACTION RESULT EXCITATION ENERGY

SOURCE detector

TYPE RANGE TYRE ANGLE

range

G,N RLY THR C THR BF5-I 4-PI

58 Ka 1 for cross sections

TABLE I THRESHOLD

Measured photoneutron thresholds

Measured

Reaction Q value, Mev.

Other 0 values, Mev. Method Reference

Au1M

( 7, »)Aul9i 7.96±0.07

S.00 -0.15 I'ltre.-aiold Hanson el al. (1049) s.; - J.l Threshold Parsons and Collie (1950) 7.90 —0.20 Threshold Sher et al. (1951) 7.78 ±0.40 Mass data Hay (1955)

N3S-4I8

7. : u *41

/• r PHO 0 sJ •

U.S. DEPARTMENT Or cr

NA TlONAL i3 v.i v.< C

' j 364
ELEM. SYM. a

Au 197 79

REF. NO.

58 Fu 1 NVB

Fuller, B. Petree, M.S. Weiss

ys. Rev. U2, 554 (1958)

Betatron; ion chamber

reaction RESULT EXCITATION energy

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE range

G,XN ABY 7-^0 C 7-40 BF3-I 4PI

Table I. Target properties and results.

Fig. 6. Mean energy and width of giant resonances. “£o” and “T” are the mean energy for photon absorption and the full width

at half maximum of the giant resonance obtained from dashed

histograms as in Fig. 5. No attempt was made to fit data with

resonance curves to obtain these parameters.

Element Form used Weight

grams barns

SvdE* HZ/A

Mcv-b Sn Sn 4.81 0.30 0.064 5.0 1 1 8.55 0.36 0.085 6.0 La La 10.43 0.34 0.063 5.2 Ce Ce 4.99 0.45 0.080 Sm Sm20j 2.90 0.26 0.073 8.6 Tb TbsOr 3.04 0.39 0.087 8.7 Ho

Er

HojOj

FrjOi

1.87 5.41 0.41 0.50 0.079

0.100

7.5

a.

5

Yb Yb,0, 5.5 7 0.50 0.090 7.0 Ta Ta 8.41 0.49 0.077 6.0 Au Au 3.16 0.68 0.085 4.2 Pb Pb 8.05 0.75 0.081 3.8

•»*(7.n) is the maximum value and ‘T* the full width at r°(v n)/2 of the neutron production cross section corrected for multiple neutron emis- sion Data were not fitted with resonance lines to determine these values. Integrated neutron production cross sections corrected for multiple neutrons above ( 7 , 2 m) threshold.

Table II. Energies of resonances in deformed nuclei.*

Nucleus Em Mev b£‘ns Method Mev

Eh Mev Em~

Mev

£i/j* Mev

»Tb'“ 14.7 6.9* CE ll.o 16.2 10.8 19.5 14.5 7.8* CE 11.5 16.0 11.0 IS.

5

«iFr‘« 14.5 21 * SC 8.5 17.5 11.5 20.0

iiEr'“ 14.5 7.8 b CE 11.6 15.9 11.5 20.0

7 iTa>" 14.1 12 .6* SC 10.5 15.9 11.3 17.3 nTa‘“ 14.1 6.8* CE 11.9 15.2 11.3 17.3 »Au,w 13.6 3.75* SC 12.5 14.1 11.8 16.2

• CE—Coulomb excitation: SC—spectroscopic: fli/s*. Hat'—energies at which clAnt resonance drops to half its maximum value.

• Adler. Bohr. Huus, Mottelson. and Winther. Revs. Modern Phys. 28. 432 (1956).

• M. L. Pool and D. N. fCundu. Chart of Atomic Huclci (Longs College Book Company, Columbus. 1955).

X N 3S-4 18 U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU or STAN-'i-iCS PHOTONUCLEAR DATA SHEET 365
REF. , ELEM. SYM. E„G. Fuller, M.S. Weiss

Phys. Rev. 112, 560 (1958)

METHOD

Betatron; ion chamber

Au 197 79

REF. NO. 58 Fu 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE range

G.XN ABX 8-23 C THR-25 BF3-I

CF DAN^S THEORY

Table I. Resonance parameters.

Tb“» Ta>“ Au‘” B^ (Mcv) 15.2 14.0 14.2 Ea (Mcv) 12.5 12.45 13.15 F,3 (Mb) 258 303 255 ra (Mev) 2.4 2.3 2.9

Et, (Mev) 16.3 15.45 13.90 ^ (Mb) 310 343 365

Tt, (Mev) 4.0 4.4 4.0

Table II. Integral cross sections.

Tb'“ Ta'“ Au‘« A S<pv*dE/0.06NZ 1.27 1.30 1.29 f<r>AE/fa.dE 2.00 2.16 1.97 Af^^.+^dE/QMNZ 1.27 1.35 1.22

Table III. Intrinsic quadrupole moments, in bams.

Tb“> Ta-“ Au‘« E>/E. 1.30±0.05 1.25±0.01 1.06±0.03 QtiR^lMXlQr" cm) 5.6 ±0.6 5.7 ±0.3 1.6 ±0.6

Qt (Coulomb excitation) 6 9“ 6.8* 2.6b

6 Adler. Bohr. Huus, Mottelson. and Winter. Revs. Modem Phys. 28. 432 (1956).

* P. H. Stelson and F. K. McGowan. Phy*. Rev. 99. 112 (19SS). form NBS-418

(R EV. 7-1 4-641 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 366

U.S. DEPARTMENT OF COMMERCE

NATIONAL 0'IREAUOF STANDARDS
L. Katz, G.B. Chidley

Nuclear Reactions at Low and Medium Energies (Academy of Science,

USSR: 1958) 371

Au 197 79

METHOO Betatron; neutron cross section; BF^ counters; ion chamber monitor REF. NO. 58 Ka 1 NVB

EXCITATION SOURCE OETECTOR

R EACTION RESULT ENERGY TYPE RANGE type range

ANGLE

G, XN ABX 8-22 C 8-22 BF3-I 4PI

T a 6 a 11 u a 2 IToposu ucnycKanuii rpomoneumponoc

HaoTon Bn. Mm Bn. Mm HaoTon ;s„. Mm S1B . Mm

V51 '11,16 20.5 LUO 8.81 16,1 Mn55 10,14 19,2 p r iu 9.46 17,6 Co39 10.44 18.6

J Tb l 58 8,16 14,8 As75 10.24 18.1 Ho>65 8,10 14,6 ysa 11,82 20,7 Tm1M 8,00 14,7 Nb<» 3.86 17,1 Lu it5 7,77 14,2 Rhl03 9,46 16.8 Ta181 7,66 13,8

J

127 9,14 16.2 Au1 9? 7,96 13,3 Csl33 9.11 16.5 Bi 203 7,43 14,5

THRESHOLDS

ne npuocACHU, nocKo.u»Ky oh:: ..pc JinaioT 22 yi$o bo bcox cjiynaiix, upoMe

aojiora, jijih KOTopCi-o 5^=21 Mm. C.BoiicTua cc'iennii cc(t) cbgachhi s Ta6a. _3._ T a 6 a a n a 1

1 HaoTon

| ®Kanc' Mm «« (S

T

), Oapn T, Mm I”, Mm • 6apn „ Y(22).

10* uaUmpox/tOO p • moao

V51 18,4 0.062 5,2 0,33 1,62 Ma» 20,2 0.060 7.0 0,39 2.01 Co69 18,3 0,068 6,3 0,44 2,30 ; As75 16,4 0,090 9,5 0,74 4,25 Y8# 17,1 0,172 5,2 0.93 5,33 Nb83 18,0 0,156 7.5 1.17 6,80 RhiM 17,5 0.160 9,4 1.40 8,28

J127 15,2 0,273 6,8 1,76 11,9 CSI33 16,5 0,238 7,7 1,59 10,7 La139 15,5 0,325 3,8 1,55 11.2 prui 15,0 0,320 4,9 1,93 13,1 Tb 159 15,6 0,274 9,8 2,49 18,1 Ho16i 13,5 0,305 8.9 2,52 18,7 Tm169 16,4 0,250 8,4 1,91 14,9 Lu175 16,0 0,225 8,4 1,90 23,0 Ta181 14,5 0,380 8,5 3,15 22,0 Au197 13,8 '

i J.475 4,7 3,04 22,6 Bi209

.

13,2 l ,

i

.

0,455 5.9 2,89 23,2

a — Bbixoa $0T0 iieriTp0 R0 B nns Au; 5 — «n(^T

) h jc(t) «ih Au

poom H3S-413

p. V. 7-1 A. 44)

> 0. PHG7CNUCLSAR DATA SUuST 367

u.s. department of commerce

N4TION4U BURSAuOF STANDARDS
Ref. W.H„ Hartley, W„E. Stephens, E„J. Winholc

Phys. Rev. 104 . 17$ (1956)

Elem. Sym.

Au 197 79

Method Li (p,Y) source, 4-80 kev protons. BF^ counters

Ref. No.

5 6 Ha 1 EGF

Reaction AE

s

ad E Jtr Notes

(Y,xn) Average Li cross section is 350 mb; cross section with detector response

weighted for low energy neutrons iJkStaT Assumed ratio 17.6/14.8 = 1.7.

Calculated cross section at 14.8 and

17*6 MeV assuming cross section

curves measured at Pennsylvania and

Saskatchewan (refer Table i).

Table I. Cross sections for photoneutron emission induced by the lithium camma rays. The results are compared min previous data

Betatron ,

! H1

Present cro««- Pennsylv ania Saskatchewan

section data Data of 1 Til • FV-

(~COl Counter Counter Me Game!

Group A Group fl 'i .if *

t »»/• . »•*

~fe 33 mb 33 mb 37 mb 60' mb 0.5 3.5 mb 47 mu

40 49 47 h0t mb 0.5 95' 0.5 30 60 mSi 23 25 23 40« 0.7 22 32 pCu 04 61 55dsl2 95' 0.6 45 75

,iZn' 43 45 4,3 90'* 0.7 3S 54

175 170 135 240' 1.0 175 175 nSn 200 190 180

320‘

240' .,7a 355 360 260 3504

1.3 420* 2.3 420> 550'

.,»V 365 355 325

•*\u 330 295 315c 1.7 480' 1.9 460 255 -hi 365 340 290 «rb 310 295 250 320* 1.6 t0 2.5 400 * 500'

250* 200' uBi 305 2S0 250 270<* 2.6 550' 2.4 4Q0 195

reference J. wrraee of 14.3- and 17.6-Mev cross sections weighted with relative intensities of the lithium gamma-rav lii **e reference 24. R. Nathans. Ph.D. thesis. University of Pennsylvania. 1954 (unpublished).

1 Malnem (private communication).

!^e merence 2J. ?ee merence ii. separate cross sections at 14.8 and | 7.6 Mev as obtained from Group A data and 14.8/17.6 betatron cross-* obtained using 14. 8 I 7. A cross-section ratio trem Pennsylvania betatron data. Obtained using 14 v 17.6 cross-section ratio iron Saskatchewan betatron data. form NBS-4I8

I6-I-63I UICOMM-Oe 1 88B8-P8S

u.s. department oe commerce

NATIONAI BUREAU OF STANOAROS

PHOTONUCLEAR DATA SHEET 368
FORM NBS-418 U.S. DEPARTMENT OF COMMERCE

(8-1-63) NATIONAL BUREAU OF STANDARDS

USCOMM-OC 18BB6-P63 PHOTONUCLEAR DATA SHEET 369
USCOMM-OC 18850-P63 PHOTONUCLEAR DATA SHEET 370
Ref. S. Cavallaro, V. Emma, C. Milone, A. Rubbino

Nuovo Cimento 73^ (1958)

Elem. Sym.

Au 197

Ref1 . No.58 Ca 2

79

EH

Method 50 MeV betatron; emulsions; neutron spectrum

Reaction E or A E ad E J

rr Notes

Au197 (y,n)

Bremss.

30

'th(Y,n)

= 7.9

90 spectra.

Fig. 1. - Energy spectrum of the photoneutrons from Au emitted at VMl 0 with the Y-rny beam. ^ = Experimental futures. For the high energy

tail figures are multiplied by 10. The curve (a)

ii the evaporation spectrum calculated under

the a-sumption indicated in the text. Curve <&>

i-i a spectrum calculated for direct emission under

the hypothesis that the residual nucleus after the neutron emission is left in the ground state. Y~ - neutrons//»7J.j MeV/mole/AiJ.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-1-03) USC OMM-OC 105SO-P63 PHOTONUCLEAR DATA SHEET 371
Ref. B. Ziegler

Z. Physik 152 , 5^6 (1958)

Elem. Sym.

Au 197 79

Method ^2 MeV betatron; pair spectrometer; absorption measurement;

ionization chamber

Ref. No.58 Zi i EH

Reaction E or AE S*

dE J w Notes

Au(n

t

) Bremss.

30 2800±500 MeV-mb

7 Montaldetti. R.. L. Katz u. J. Oof.m mberc: I'Iivs Rev. 91. 659 (t95?i.

* Nathans, U.. u. J. Halim. rn: I'Iivs. Ucv. 93. 4^7 . |<»54).

9 O vvrilov, B. I., u . L. Lazakkwa: >i\. Phy* J Iv.T.P. 3, $71 (1057).

10 Berman, A. I., u. K. L. Brown: I'hvs. Rev. 96. >3 . to-u).

11 Danos. M. : Nuclear I'Iivs. 5. 23 (1*>5.S).

< ner Kfni.ilivjrplionsvMrkun^'.i'i'TMbniu t 'mb mr \n: * n„ „ n.n h ’. 1- n.. „ nacb •;

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-1-63) USCOMM-OC 18SSS-P93 PHOTONUCLEAR DATA SHEET 372
Ref. L.B. Aull, G.C. Reinhardt, W.D. Whitehead

Nuclear Phys. 1%, 292 (1959)

Elem. Sym.

Au 197 79

Method Si detectors

Ref. No.59 Au l egf/eh

Reaction E or AE S*

dE J

"• Notes

Au

1

^(Y,n.'

Bremss,

18-65 r65

J ~ 700 MeV-mb Yield measured relative to Cuc ^(Y,n)

Fig. 1. Cold (7, fait n) smooched integrated cross section and cross section, as described under

fig. 3.

1 Fig. 3. Taacaium (7. fast n) smoothed integrated cross section and cross section. The points and the smooth curve represent the smooched integrated fast neutron cross section (see text) as defined by

Jo a‘y. a)

I where fj y t :a.t c; i=» the cross section for puotoproduction of neutrons with energies above the

Si :,, n. thrcsnold and E is the incident gamma ray energy. The errors indicated were

obtained by propagating the counting uncertainties 111 the vieid data through the integral cross section matrix. The histogram represents the first dufercnccs 01 the integrated cross

" section curve.

TaOEE l

Ratio of fast neutron integrated cross section to total neutron integrated cross section

d-t McV si) Mev M McV

Tantalum 10.3 ±‘2A °

0

‘) j 7.3= 1.7 % lO.O-i.i": ! lu.'j--:.: g

0

a

)

i , *

4 = 4 - 3 *'

i

4

) Comoarcd to 7. n) cross section of Fuller and Weiss*',;

3

) Compared to 7. xnj of Tcrwiiiigcr ana Jones i8

) ;

c

) Compared to 17. 11 ) of Edwards and McMillan ^uata tnhea at .0 MeV <

Ref 17 : Fuller & Weiss - Phys. Rev. 112,

560 (1958)

Ref 18 : Jones & Terwil linger - Phys. Ra> . 2i, 699 (1953)

Ref lgj : Edwards & MacMillan - Phys. Rev.

87, 377 (1952)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form HBS-418

(8*1-63) USCOMM-OC 1 8 83 6* P 63 PHOTONUCLEAR DATA SHEET 373
Eo D. Makhnovskii

J. Expti. Theoret. Phys. (USSR) J6 ? Soviet Phys. JETP 36 (9) 519 (1959)

METHOD

739 (1959)

EL EM. SYM. A

Au 197 79

REF. NO. 59 Ma 1 EGF

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,P RLY THR - 70 C 70 EMU-D 5-11 90

G,D RLY THR - 70 C 70 EMU-D 7-14 90

REL D TO P YLD

Y(Y) d )A(Y?p) “ 0. 14±0„07

FIG. 4. Distribution of the tracks of photoparticles as a function of the number of grains in the last 90 \l of the track.

1 — normal distribution of photodeuterons, 2 — normal distribution of photoprotons, 3 — sum of both.

form NBS-418

(REV. 7-1 4*641 use OMM-OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 374

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. R.F. Askew, A.P. Batson Elem. Sym. A Z Nuclear Phys. 20, 408 (i960 ) Au 197 79

Method Electron synchrotron; emulsions Ref. No. 60 As 1 JKH

Reaction AE

Au197

(Y,n)

Bremss.

55

a d E J n Notes

Peaks observed in neutron spectrum

at En

= 1.25 MeV and 5.5 MeV.

Detector at 90°.

Figure 1 ; Relative photoneutron energy

spectrum. The solid curve is the

statistical theory prediction.

form NBS-418

(8-1-63) use OMM- DC 18556-P63 PHOTONUCLEAR DATA SHEET 375

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
fig. 4 Cross sections for Au derived from the vivid curves <u tie J. The relative magnitudes of function of electron energy The circles are the experimental results. Theoretical resuits for a point

the cross sections tor the two reactions were drawn arbitrarily. nucleus are shown as solid curves. The dashed curves indicate an approximate correction for the

PHOTONUCLEAR DATA SHEET 376
PHOTONUCLEAR DATA SHEET 377
Mo A. Bak, K. A. Petrzhak, Tei-Mei Chen

Izvo Akad . Nauk SSSR 24 ? 818 (i960)

ELEM. SYM. A

Au 197 79

METHOD REF. NO.

60 Ba 8 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABX 14,13 D 14,18 ACTI

4PI

a at 17.5 MeV 460±50 mb

form NBS-418

(REV. 7-14-64) USCOMMcQC 26010-P64 PHOTONUCLEAR DATA SHEET 378

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
. N. Geller, J. Ha I pern, and E. G.

Phys. Rev. _U8, 1302-12 (i960)

METHOD

Mt-irhead

c.l. c.m . j i M. ^

Au 197 79

DCF. NO. Betatron; neutron threshold; ion chamber 60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Kntclinu No. runs Present results Other results Method Reference

A_ 7 f>,n)AulM 8.057±0.022 7.96 ±0.07 threshold

A*

au N 3 S-418

' I4-A4I Pi'aGTCNwCl.

.

U.S. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OP STANO*»OS

379
V . P . Chizhov

Zhur. Eksp. i Teoret. Fiz. ^8, 809 (i960

Soviet Phys. JEIP 11, 587 (i960)

Elem. Sy m.

Au

; z

197 79

Method 90 MeV Bremsstrahlung; scintillator counter telescope

Ref. No. 60 Ch 1 rm

Reaction

Au197

(Y,d)

Au197

(Y,P>

Au197

(Y,t)

E or AE <7d E J n Notes Energy Range of particles detected;

E

d

- 15.5-30 MeV

E

?

- 15.5-30 MeV

E

£

- 17-50 MeV

Ratios;

d(7,d)/a(Y,p)

3 „ 9 . go.

)/$(?, d)

FIG. 3. Ratio of (yf d) to (y, p) cross sections for protons and deuterons of energies 15. S—30 Mev as func*

tion of atomic weight A. The solid curve shows the dependence given by Eq. (2), arbitrarily normalized. TABLE I

Element \ 00Nt /Nd Element 100Nt /Nd Element 100N,/Nd Element ioow f /.v

rf

Li* 30=3 B 39±8 Ni 10±4 In 5=2.5

Li 7 22.5=2.5 | Si 10*4 Co 2.5=3 Ta 10=4

Be 13±2«t> | S 8 = 4 Cu 2.2x2 Au 3=3

Fwf*s4 f\£S*4l8

'-.VCJ,viviOC 13 3S«*P«S> PHbTONUCLEAR DATA SHEET 380

UJ. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OR STANDARDS
Ref. E.D. Makhmovskii

Zhur. Eksp. i Teoret. Fiz. 58, 95 (I960)

Soviet Phys. JETP ll, 70 (i960)

Elem. Sym.

Au 197 79

Method Bremss. from Sycnchrotron, 23 MeV max. ; emulsions

Ref. No.60 Ma 1 JH

Reaction E or A E ad E J

rr Notes

(y,p) E^ =22,

ymax.

E =10.9

P

Angular distribution, energy distribution, and yield all consistent with

Wilkinson calculations.

Absolute yeild (l.6 ± 0.9)X10~^

proton/mole - MeV. Wilkinson absolute

yeild agrees with this.

FIG. 1. Proton energy distribution. 1 — energy spectrum

from the theory of direct resonance emission of nucleons;

2 — energy spectrum from Courant’s theory of a direct photoeffect; 3 — energy spectrum from statistical theory.

30 - FIG. 2. Proton an- 20 - gular distribution. 10 - i

zo

5 ^ 40 so too no m wo u.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(3-1-S3) USCOMM-OC 188S6-P83 PHOTONUCLEAR DATA SHEET 381
It telbel, A«K« Mans

Phya. Rav. 118, 701 (i960)

Method y*§, fro* F

1

^(p,ay) reaction; protone fr<

Reaction E or AE E

0 r

s

Au

19T

(y,y) - 7

Vanda Graaff; Mal<

ud E J

rt

<“> (*«

Elem„ Sym. A Z

Au 197 79

Ref. No.

" 60 Re 1 JHH

Notes

2.05 HeV) * < 2.7 mb

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS

form NBS-418

(a-i-«3) uscomm'DC lesss-Pea PHOTONUCLEAR DATA SHEET 332
J. Miller, C. Schuhl, C. Tzara

J. Phys. Radium 22, 529 (1961)

ELEM. SYM.

Au 197 79

NVB

METHOD

Positron annihilation; neutron cross section, BF^ counter;

ion chamber

REF. NO.

6l Mi 1

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,XN ABX 8- 20 D 8-20 BF3-I 4PI

cr

form NBS-418

(REV. 7-14-04) U3COMM-DC 20010-P64 PHOTONUCLEAR DATA SHEET 383

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. I.C. Nascimento, G. Moscati, J. Goldemberg

Nuclear Phys 0 22, 4-84- (1961)

Elem. Sym.

Au

Ref. No. 61 Na 1

197 79

Method Betatron; BF^ neutron counters; Nal for activation method, JHH

Reaction E or A E S"

dE J

rr Notes SZt it

(Y.n)

(Tj 2n)

Bremss.

10-22

Cross sections in Figure 6 derived

from data in Figure 1 using Katz and

Cameron [Can, J. Phys. 2^, 518

( 1951 )] spectrum tables.

Assumed:

o(2i sn) = L a abs.

e X

( 1+x)

x = (a/E-Ej 5/

2

(E-E2n)

a = 0.035 (A-12) as given by

Heidmann and Bethe.

Fig. 1 Yield curves for the Aum(y, n) and Au1,T fy. 2n) reactions.

Fig. 6. The cross sections of the Au**T

(y, n) ar^d Aum(y, 2n) reactions

Taule l Comparison of experimental data with evaporation theory

r.^.cmi- Element1 empirical) neutrons

per 100/2 per mole

Y, Experimental

(semi-empirical 1 -yi- -experimental) Refs.

V« 5 0 • 10* 2.1 • in* 2.4 Hi-5 Co5 *

! 3.2 Hi* 2.0 in* 1 J hr 1 *) Cu° 3.S III* 3.0 Hi* 1 3 • l0-? 1.2 a 10-' *) As,# 1 1.2 I0r 3.4 10* 3.5 10-* • ) Nb# * i 5.2 107 7.1 10* 7 3 •' 10-* l 9 < in- 1 ». 4\ I‘” 2.7 in* 1.4 • Hi* 1 '.» • in- 1

I S •. io-‘ *'. tins work

Pr ul 1.8 • l'»* 14 in* 1.3 • lO-i l 4 • Hi- 1 ErMT 1 3.0 x- lu1 I..H in* 2.0 • ln-‘ IT) Ta«*‘ 5.1 v 1U# 1.9 • 10* 27 I0“ l 3.4 v l0-‘

\u‘»7

11 a < lu* ! 2.0 in* 2.6 • 10~ l 2.7 • lu 1 *). this work

Bi z0*

1 T.ll • lu‘ 3.5 • 10* 2.1 • 10

l

References

J Rl^tt and V'. F. Weisskopf. Theoretical Nuclear Physics (John Wilev and Sons. New

York 1932)

2! E. A. Whalin and A. O. Hanson. Phys. Rev. 89 (1953) 324

L

3 1 A. I. Berman and K. L. Brown. Phys. Rev. 96 (1954) 83

4) E. Silva. J. Goldemberg and P. B. Smith. Nuovo Cim. 9 (1958) 17

•3 1 F. Ferrero, R. Malvano, K. Silva, G. Moscati and J. Goldemberg. Nuclear Phvsics, 10 (1959) 423

J. O’Connell, P. Dyai and J. Goldemberg. Phys. Rev. 116 (1959) 173

7) R. Nathans and J. Halpern. Phys. Rev. 93 (1954) 437

8) G. Moscati and J. Goldemberg, Anais da Academia Brasileira de Ciencias (to be published)

9) R. Montalbetti. L. Katz and J. Goldemberg, Phys. Rev. 91 (1953) 659

!0i D. Strorainger. J. M. Hollander and G. T. Seaborg. Rev. Mod. Phys. 30 (1938) 585

11) L. Katz and A. G. W. Cameron. Can. J. Phys. 29 *1951) 518

12) J. Heidmann and H. A. Bethe. Phys. Rev. 84 (1951 )274

!3' E. G. Fuller. B. Petree and M. S. Weiss, NBS Report No. 3680

14) P. C. Gugclot. Phys. Rev. 81 (1950) 51

15' B M Spicer. Phys Rev. 100 (1955) 791

U.S. DEPARTMENT OF COMMERCE

matiqmal bureau of standards form NBS-418

(8-1-63J USC OMM°OC 18690-P63 PH0T0NUCLEAR DATASHEET 384
I

PHOTONUCLEAR DATA SHEET 385
Ref. R. E. Walsh, D.J. Donahue

Phys. Rev. 121, 880 ( 1961 )

Elem. Sym.

Au 197 79

Method Monoerg ic 7 's from thermal n- capture; activation

Ref. No. 61 We 1 JHHReaction E or AE

S*

dE J * Notes

(Y>n) 7.91-9-7S Measurement of 65 kev x=ray from

1Q6

K- capture in Au 7

,

Data in Table II (mill ibarns) ; com- pares with Fuller and Weiss in

Figure 4.

thresh. 7-91 8.4- MeV.

Fig. 4. Cross section vs energy for the Au,,, (7.*)Au1,, (5.6 day)

reaction. The circles are the data of Fuller and Weiss.'

Table II. Summary of measured cross sections.

•y-rav source \ Energy (Mev) Reaction\

Co

7.49

Fe

7.64

A1

7.73

Cu

7.91

Cl

3.56

Ni

8.997

Fe

9.30

Cr

9.72

Fe

10.16

X

10.83

0dr0.05 0.5dr 1 4.8drl.6 14±5 32±16 44dr 15 83dr 33 120±48

Au^’fy.rOAu19 * 0±2 34±17 44drll 64dr 30 SOdriO 0±0.1 29± 15 30drl3 46re21 36-iil 260=fc93 Xb’*(y,«)Xbn 0.0()8±0.005 1.0drU-4 2.4dr0.7 AgWI (‘y,») OdrO.l 4.4± 1.5 22drl6 23=fc7.5

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARDS

form NBS-418

(8-1-63) USCOMM-OC 1 8856-P63 PHOTONUCLEAR DATA SHEET 386
NATIONAL BUREAU OF STANDARDS

form NB5-418

(8-1-83) USCOMM-OC 18536-P83 PHOTONUCLEAR DATA SHEET 387
Ref. J.Sc O'Connell, P„A. Tipler, P. Axel

Phys. Rev. 126 , 228 ( 1962 )

Method 25 MeV betatron; monoergic photons by coincidence with analyzed

electrons from Bremss. target; Nal

Reaction AE

S

'7 dE

(7,7’)

(7,7)

11.48 - 17.72

13.5

Table I. Experimental results.

Ey Mev

E3 Mev

Nytt

10*X

Total Counts Chance

Counts

da/dCl 10“ Individual

!S cmVsr

Average

11.48 2.06 20 12.0 0.80*0.45

11.CX3 18.03 1.64 21 9.7 1.41 ±0.58 1.07*0.30

11.84 1.61 15 7.1 1 00*0.50

Chance 1.70 9 / .5

12.50 2.66 72 33.2 3.02*0.66

12.64 18.03 1.95 55 27.3 2.94*0.79 3.18*0.43

12.73 2.15 57 19.9 3.57*0.73 Chance 2.15 24.5

13.30 1.39 53 12.2 6.14*1.1

13.45 19.83 1.11 40 9 0 5.83* 1.2 6.73*0.71

13.62 1.15 53 7.8 8.21*1.4 Chance 1.10 8 3.6

14.30 3.07 134 29.2 7.20*0.80

14.44 19.83 2.27 107 19.2 8.1S*0.97 7.12*0.52

14.58 2.28 87 22.3 5.99*0.87 Chance 2.06 18 23.0

15.29 1.94 104 48.0 6.1 1*1.1

15.41 19.83 144 66 26.6 5.80* 1 .2 5.45*0.66

15.53 1.48 61 29.9 4.45*1.1 Chance 1.34 32 28.8 0.820 22 5.6 4.30*1.3

16.69 22.02 0.564 14 4.6 3.59*1.5 3.83*0.78

16.83 0.623 15 4.6 3.59*1.4 Chance 0.668 7 4.8

17.48 0.882 17 12.6 1.08*1.05

17.00 22.02 0.631 16 5.5 3.59*1.35 3.48*0.80

17.72 0.622 24 7.4 5.78*1.7 Chance 0.666 7 5.6

Etc. 6. Differential Scattering Cross Section of Au 197 at 135’. The cross section includes both elastic scattering and high energy

inelastic scattering. The ordinate is the differential cross section in units of 10~2S craVsr; the abscissa is the gamma ray energy in Mev. The energy resolution varied from point to point but was

about 150 kev±30 kev.

Data taken at 0 = 135 . Fitted to a "two Lorentz line fit":

<*

2 = 0.255 barn, E

q] = 13.15 MeV, r

;= 2.9 MeV. a = 0.565 barn, E = 13.90 MeV, r

2

=4.0 MeV.

suggested by Fuller and Weiss [Phys.

Rev. 112, 56O (1958)].

Flc. 7. Differential Scattering Cross Section for Au197 at 135’. The experimental dots (this experiment) and open circles (0.82 times the adjusted value obtained from references 23 and 24) may include high energy inelastic scattering; the solid curve is

i >.82 times the prediction for only elastic scattering obtained by

using published value of measured absorption cross section (reference 21). The energy resolution varies from point to point but is about 350 kev.

Ref. 24 : The cross sections given in

ref. 23 were reduced by a factor 0.866

in accordance with ref. 15 and they were converted from 120°to 135 ° by

assuming a l-Cos^g distribution. The

normalization factor of 0 . 82 , mentioned in the text was also applied.

Ref. 21: Fuller and Weiss. Phys. Rev.

112, 560 (1958).

Ref; 25 : Fuller and Hayward, Phys. Rev

101 , 692 ( 1956).

form NBS-418

(8-1-03) USCOMM-OC 18856-P03 PHOTONUCLEAR DATA SHEET 388

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS
U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STAN^^RDS -O rm NBS-418 ( 8 - 1 - 63 ) JSCOMM-OC 1 8350-P03 PHOTONUCLEAR DATA SHEET 389
G„Co Reinhardt, W.D. Whitehead

Nuclear Phys. jjO, 201 (19d2)

' hou 55 MeV betatron; synchrotron; Si^°(n, p) Al^ activity; Cu°3(y,n)Cu

monitor.

Elem. Sym.

Au 197 79

62 Ref. No.62 Re 1 EGF

ivciiction

Au

197 (y,n)

E or A E crd E J Notes

Bremss.

55

Figure 7 : Dotted curve is of form

2 2 a + a. cos0 + a.cos 0 + a^cos 9 TM 0 1 2 2

2

a. cos 0; solid curve is of form a +

1 2

° a^cos0 + a^cos 0; errors on points are statistical errors in counting only.

0

Fig. 7. Angular <listiilnitn>u of f.oi n< uln-u-. inuit See fig. 5. A— . 1

|

I

Table 2 Parameters oi the fit tl) for the expressions u0 — a t cos 0 — a; cos: 0, a — b sir. : 0 — c cos Q and A n -A i Pl ~A i Pi

Bill) Bi(2) Pr Au V Ho La

l (10-0. 02 1.00 — 0.02 1.00 — O.o2 1.00= 0.02 l.oo — o.o3 l.oo=o.o2 l.OO— o.«»l u, 0. 15 — 0.03 0. 16 — 0.04 0.17 — 0.04 * 14 — 0.03 0.17 = o.06 0. 12 — " "3 o. 14 — 0 o3 -a, 0.47 — iMJii o.m — o.os 0.41 —o.O!) • 21 -O.U7 0 15 = 0 | l 0.34—o.od 0.30 — 0.06 A x *) 0. 16 = 0.04 0.21 — 0.05 0.20 —o.o5 > 15 — 0 04 0. 16 — 0 00' 0.

1

4 — 0.04 0.16 — 0.06

0.37 — 0. 05 0.31 =0 00 0.32 — 0.07 " 15 — O.o5 Oil— 0.06. 0.26 = 0 .05 O.30 =0.u4

a 0.53 =0.06 0.00 — 0.06 0.51)— O.O0 0 70 — o o7 0 65 — 0.1

1

0 66 — " 06 O.ol —0.06

b 0.47 =0.06 0 40 = 0 .OS 0.41 — 0. 01) o 21-o 07 0.15 — 0.11 0.34 — 0. 06 0.30—0.06

c 0.15 — 0.03 0.16 — 0 04 0.17 —0.04 0 14 — 0.03 0.17 —0.0G 0. 12-0.03 0 14=0 03

Renormalized so that .!„ = l

Table 4 Parameters ot the lit (3) for the expressions u„--a t cos 0=at cos *6 — a, cos J 0,

l -A l Pl -r l,p; -.n,p

Uiill i>if2) Pr Au V Ho La

a 0 1.01-0.02 1,00—0.02 l.Ol =

w.i»3 o.OS — o.o2 1.00 — 0.03 1.00 — 0.02 l.0l = o.02

a, 0.11) = 0.05 o.l7 —o.o7 0.21 iO.oT 0.07 = o .06 0. Hi — O.Oil 0.12-0.05 0.l7 =o 05 — a. "50=0.11 0,37-0.15 0.50 — 0. io 0.05=0.12 0.13—0.20 0.33—w 12 u.47 =o.ll

L* j 17.A0.16 u.o5=0 24 -0.17-0 25 0.31— O.l'J o.05=0.32 0.03-0 P.) —0. 17 =*». 17 u* o.ll-o 15 0.23— 0 IS 0.13 — " 20 0.27 —0.13 o. 20 = 0.22 0.15-0 l \ o.00 = o.l3 — A -t - 0.45 — O.o'.i 0.26 —0. 1

1

0.3!) — 0.12 0. 03 =0.06 O.oo— 0.14 0.2; oi) 0.37=o oi) .i,* — O.06 — 0 .01) 0.02 -O il — 0.06 — o 12 0. 13 — O.OS 0.02 — 0. 13f O.ol —0.06 — 0. 06 = o 06

•) Renormalized so tiiat A 0l

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS

rOHM NBS-418

(8-1"53) USCOMM-OC 18S5#-P«3 PHOTONUCLEAR DATA SHEET 390
1

T. Kaminishi, C. Kojiraa

Jap. J. Appl. Phys. 2, 399 (1963)

Au 197 79

METHOD

Linac; isomer yield; activity

REF. NO. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPC RANGE TYPE RANGE

G,G/ RLY 1 c k ACT14PX

(0.10, 0 . 27, O.kO)

Table II. The isomers obse rved

Isomer Observed value Referenced value11113 ’

Half-life Energy (MeV) Half-life Energy (MeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.161

Br-79m 4.80 sec 0.209 4.8 sec 0.208

Sr-87m 2.3 hr 0.390 2.8 hr 0.338 Y-89m Id.O sec 0.920 14 sec 0.915 Rh-103m 58 min * 57 min 0.040

Ag-107m 1 44 sec 0.094 Ag-109m

? 42 sec > 0.95 40 sec 0.088

Cd-lllm 47 min 0.150,0.255 49 min 0.150,0.247

In-115m 4.5 hr 0.335 4.5 hr 0.335

Sn-117m 17 day 0.160 14 day 0.159,0.161

Ba-137m 2.6 min 0.660 2.6 min 0.662

Er-167m 2.10 sec 0.209 2.5 sec 0.208

Hf-179m 18.5 sec 0.157,0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 0.0 sec 0.1025,0.2915 others

Ir-191m 4.90 sac 0.129, <0.07 4.9 sec 0.042-0.129

Pt-195m 4.5 day 0.065** 4.1 day 0.031-0.130

Au-197m 7.0 sec 0.10,0.27,0.40 7.2 sec 0.130,0.270,0.407 Hg-199m 43 min 0.160,0.370 42

1 min 0.153,0.368

* This isomer was measured with a G-M flow counter.

** This value corresponds to Pt-K X-ray energy. Table III. Induced activation .at.

Element Beam

energy (MeV;

Counting rate

( x 1 C000 cpm,

Sample form

Se 5 1300 metallic pellet Br 4 1600 XaBr grain Sr 6 0.3 SrCOj powder Y 5 V-0 metallic grain

Rh 5 0.3.* RhCl„ grain

Ag 5 !80 metallic plate Cd 6 0.5 CdCi. grain

In 6 3 metallic plate Sn 6 0.0005 metallic plate Ba

-0 0.

6

BaS powder

Er 4 4900 Er^03 powder Hf 5 1600 metallic plate W 5 120 metallic powder

Ir 5 3100 metallic powder

pt 5 0.3 metallic plate Au

j 4200 metallic plate Hg 6 0.09

1 metallic liquid

* The value measured with a G-M flow counter

“

o

rm NBS-41S REV. 7-1 441 ISCOVU.OC I8010.R84

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 39*
M. Langevin, J.M. Loiseaux

J, de Physique 2h, 1027 (19^3)

tJ- )TM. A

Au 197 79

METHOD

Betatron; photon scattering REF. NO.63 La 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

Gy G ABX 9-26 C 32 NAI-D DST

Angular Distribution:

W(0) = 1 + a cos

2

0

for 11 < E < 20 MeV, find a = 0.9±0.1

form NBS°419

(REV, 7*14-04) USC OMM-OC 26010-P04 PHOTONUCLEAR DATA SHEET 392

U.S. DEPARTMENT OF COMMERCE

N/'<ON*L BURIJUJOF STANDARDS
REF. ELEM. SYM. j A L A. Veres

Acta Phys. Acad. Sc i. Hung. _l6,

METHOD

261-73 (1963) Au 197 79

REF. NO.

Radioactive source 63 Ve 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G/ ABX 0-1 D 0-1 NAI-D

ISOMERS

Ta6jiHua II H3MepeHHwe 3HaneHHH nocae ooJiyMemiH, cpaBHHBaeMbie c apyrnMH JiiiTepaTypHUMii

flaHHbIMII

SiieMSHT

AKTHBHOCTb o&nyqeHHB

nocne

Aktmbh.

DKCTpn.

B KOHUe

JlyTepaTypHbie aaHHue UaHHue

H3MepeHHfl r

nepBoro H3MepeHMR

(HMn/MHH.)

ooiiyn. <H»n/

MHH.)

T,l, E

(•OB) ! Tu,

1

i E

(K3B)

( 10“ **CM*) ym

(lO-^SB)

Se-77m 3842±96 5400 17,5 ceK. 160 18,1 ±1 ceK. 160± 10 9,5 1,75 Sr-87m 191 ±5 200 2,8 m. 390 2,9 ±0,1 m. 365 - 25 0,85 0.2 y-89m 96 ±20 170 16 ceK. 910 16,7 ±5 ceK. 0,08 0,02

Rh-103m 28-5 31 57 MHH. 40 58±2mhh. 20,5 ±0,5 0,08 0,01 Ag-107m 220 ±14 250 44 ceK. 93 43,8±0,6 ceK 91 ±10 0,8 0,2 Ag-109m 39 ceK. 88 Hf-179m 80± 18 155 19 ceK. 160; 215 19±2 ceK. 1 0,2

Ir-191m 90 ±20 250 4,9 ceK. 42; 130

5 ±2 ceK. 5,6 1

Pt-195m 90±9 100 3,5 a. 31;

100;

130;

3.5 ±0,2 a. 32±3

67,5 ±5

96±5

130±10

0,2 0,04

Au-197m 240± 16 1 520 7,2 ceK. 130; 277; 407

7,2±1 ceK. 68:130: 280 ±20

390 ±20

0,07 0,01

Hg-199m 9,6±3,2 I 42 MHH. 160; 370

0,005 0,001

Ada Phy$o Hung. Tom. XVI. Fate* 3.

FORM NBS-418

(REV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 393

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
form NBS-418

(8-1-83) USCOMM-OC 18SS8-P63 PHOTONUCLEAR DATA SHEET 394

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. M. Langevin, J. M. Loiseaux et J. M. Maison

Nucl. Phys. 114*124 (1964)

- L. £M. 5TM. A

Au 197 79

method

Bremsstrahlung scattering

REF. NO. 64 La 1 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G ABX 10-25 c NAI-D DST

Tableau 1 Le parambtre a(E) de la distribution angulaire

Noyau

11.5-14. MeV 14-17.5 MeV 17.5-20 MeV 20-30 MeV

Exp. Ellipsoidal Triax. Exp. Ellips. Triax. Exp. Ellips. Triax. Exp. Ellips.

Contribution Quadrupolaire %

Tb °-s -o\

5 0.41 0.39 0.54!°;} 3 0.70 0.50 25 0.97 0.85 1 Ho °- 27 -S:i

s 0.44 0.407 OA3 -o.ol 0.71 0.53 25 0.95 0.9 0.4±0.1 1 Er °.27:j>;} 3 0.44 0.407 0.8 0.71 0.53 25 0.95 0.9 1 Ta 0.6 t°0 [ S 0.58 0.68+°;J

5 0.81 20 0.96 Au a^U 1-20 MeV) = 0.9 0.7±0.1 . 1 a,* (11-20 MeV) 1

Fig. 6. Sections efficaces diffirentielies de diffusion obtenues pour l'or. La courbe trac4e correspond a

1’ application des relations de dispersion aux sections efficaces d’absorption de Fuller et Weiss “) (F. W.)

Fig. 2. R4sultats exp^rimentaux et sections efficaces de diffusion d6duites pour l’or, Em =» 32 MeV. form NBS-418

(R EV. 7-1 4-64) USC OMM.OC 26 010- P64 PH0T0NUCLEAR DATA SHEET 395

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. F. I. HavliCek and M. Modesto

Energ. Nucl. _l2j 77 (1965)

ELEM. SYM.

Au

A

197

z

79

METHOO REF. NO. 65 Ha 2 JOG

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

0 , A SPC THR-31 • C 31 EMU-D 5*20 DST

1 0 cos -5 1

Fig- 10.

Fig. 11.

form NBS-418

(R6V. 7.14.84)

•4 USC OMM.OC 28010-P64 PHOTONUCLEAR DATA SHEET 396

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
B. MacDonald, J. A. Diaz, S. N. Kaplan, and R. V. Pyle

Phys. Rev. JL39, B1253 (1965)

METHOD

ELEM. SYM.

Au

REF. NO.

197 7Q

Cyclotron; [i capture 65 Ma 2 NVB

reaction RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE TYPE RANGE type range

MU- ,XN N0X 10 - 20 D 0 SCI-I 4EI

[DO NOT PUT II 1 DATA INDEX]

Tries to fit data with Fermi gas and Gaussian NEUT MULTIPLICITY

momentum distributions.

Table IV. Corrected experimental results. '

Average

multiplicity, Multiplicity distribution (adjusted to 0.545 efficiency) T»r*et <»> Ft Fi Ft Ft Pi Pi Ft Ft

A1 1.262 ±0.059 0.449 ±0.027 0.464 ±0.028 0.052 ±0.013 0.036 ±0.007 -0.0023 ±0.004 -0.001 ±0.004 0.003 ±0.004

SI 0.864 ±0.072 0.611 ±0.042 0.338 ±0.042 0.045 ±0.018 -0.002 ±0.008 0.003 ±0.005 0.002 ±0.005 0.003 ±0.006

Ca 0.746 ±0.032 0.633 ±0.021 0.335 ±0.022 0.025 ±0.009 0.004 ±0.006 0.003 ±0.003

Fe 1.125 ±0.041 0.495 ±0.01

8

0.4I6±0.0I9 0.074 ±0.011 0.014 ±0.005 -0.0001 ±0.003 0.002 ±0.003

Ag 1.615*0.060 0.360 ±0.021 0.456 ±0.023 0.144 ±0.017 0.031 ±0,009 0.007 ±0.005 0.002 ±0.004 0.001 ±0.003

1 1.436*0.056 0.396 ±0.021 0.474 ±0.023 0.087 ±0.015 0.035 ±0.009 0.007 ±0.003 0.0002 ±0.004 Au 1.662 *0.044 0.370 ±0.015 0.425 ±0.016 0.156 ±0.012 0.032 ±0.006 0.014 ±0.004 0.003 ±0.003 0.0003 ±0.003

Pb 1.709 ±0.066 0.324 ±0.022 0.483 ±0.025 0.137 ±0.018 0.045 ±0.010 0.011 ±0.006

Ag* 1.60 ±0.18 0.389 ±0.100 0.455 ±0.075 0.120 ±0.035 0.030 ±0.015 0.001 ±0.003 0.009 ±0.006 0.000 ±0.007 0.010 ±0.007

Pb* 1.64 ±0.16 0.348 ±0.100 0.479 ±0.057 0.137 ±0.027 0.018±0.012 0.010 ±0.005 0.005 ±0.004 0.003 ±0.002 0.002 ±0.002

Results of Kaplan. Moyer, and Pyle (Ref. 1).

.L’

1

a Til

2

- ,

Aluminum —

«

<•> • I.Z6 _ 1 mVwO.59 ^

‘

A

1 . 58.0 TL T

-1 F-|-l-|-T|

Silicon ”

<n> *0.66 R*/M . 0.75 X« • I.» TW - - -

6

4 - T

2

-

- Colcium

<n> . 0.73

• 0.92 X* • 2.3

-r T . „ t

7k

.1

Iron _

<»> • 1.13 M*/M" 0.65 '

X

1 • 10.8 ;V, , , '

6 -

i 4mi*

2 -

Silvr

<«> • 1.62 M*/M«0.43

X* .23.6 V ;

L-71

Iodln*

(n> • 1.44 - M*/M> 0.54 X* • 58.5

. 1

.6- Til

2

- °L_^

Gold

<«> • 1.66

• 0.44

, X* • 34.4

2 4 6

' i

0

Leod

<n> • 1.71 M*/M* 0.44 X* • 54.5 - ll

2 4 6

n

Fig. 11. Comparison of the observed neutron multiplicities with

histograms calculated by using the Gaussian momentum distribution, aV2iW=» 20 MeV.

form NBS-418

(REV. 7-14-841 USC OMM-OC 28010-P84 PHOTONUCLEAR DATA SHEET 397

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
RcF. tu £M. S r M. A L, Meneghetti and S „ Vitale

Nuclear Phys„ 6j., 3 16 (1965) Au

METHOD REF. NO.

197 79

65 Me 2 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

type range TYPE RANGE

G j A SPC THR - 35 C 35 SCD-D 5-26 90

oz

10

Fig. 2. The histograms show the experimental a-spectra. The solid lines are the calculated evaporative

spectra corrected for target self-absorption and normalized to the maximum of the experimental

spectra.

Table 1 a yields from the 90° data. Yield (per mole R)

Elements Experimental Calculated evaporative Cu (1 ±0.1)10* 3.1 10* Ag (2.8 ±0.3)10* 3.4 10* In (1.05±0.1)I0* 3.05 10* Au (1.7 ±0.2)10* 8.7

Errors in experimental yields are compounded of statistical errors and errors in the absolute calibration of the beam.

form NBS-418

(REV. 7-14-84) USC OMM-OC 28 010- P84 PHOTONUCLEAR DATA SHEET 398

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
H. M. Gerstenberg and E. G. Fuller

NBS Tech. Note 416, June 1967

METHOD -

EL EM. SYM.

Au 197 79

REF. NO.

67 Ge 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE type range

G,N ABY THR- 27 C 22,27 BF3-I 4PI

Table 7. Comparison of neutron yields. Yields are given in units of (neutron cn^/MeV nucleus) xlO" 38 . The estimated uncertainties in Y and Y

q are of the order of 6£ and 10f, respectively.

form NBS-418

(REV. 7-14.64) USCOMM-OC 26010- P64 PHOTONUCLEAR DATA SHEET 399

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUR E AU OF STANDARDS
Fig. 31.“ Absolute neutron yield as a function of atomic number. The neutron yield from calcium

(Z = 20) is particularly low in comparison with the other elements because its (y,n) threshold

is high compared to the mean energy of the giant resonance.

400
REF. R. R. Hurst and D. J. Donahue

Nucl. Phys. A9I . 365 (1967)

EL EM. SYM.

Au 197 79

METHOD

Neutron capture gamma rays

REF. NO. 67 Hu 1

REACTION

G,N

RESULT

ABX

EXCITATION ENERGY

9-11

SOURCE TYPE RANGE

9-11

DETECTOR

BF3-I

EGF

4PI

Table 1 Fig. 1. Cross section (in mb) versus mass number of the target for gamma-ray energies of 9.00, Photoneutron cross sections (mb) 9.72 and 10.83 MeV. The solid lines are plots of eq. (1) in the text.

Target 7.72 MeV 9.00 MeV 9.72 MeV 10.83 MeV

“Co 9.0-t- 0.8 "As 20.4 ± 1.7 "Nb 0.53 ± 0.10 1 4.6 ± 2.2 25.8 ± 2.1

l03 Rh 10.6± 1.7 38. 8i 3.1

107 Ag 1 10»Ag ) 10.0± 1.5 37.6 ± 2.9 n‘In 17.1 ± 2.6 33.3 ± 2.7

131 Sb l 133 Sb J 20.7 ± 3.1 42.5 ± 3.6

127 J 38.7 ± 5.8 38.8 ± 3.1

133 Cs 3 1 .7 ± 4.8 52.5 ± 3.8

13*La 8.61 ± 0.86 40.8 ± 6.5- 63.0± 5.0

141 Pr 2 1 .5 ± 3.2 58.3 ± 4.1 IMEu 1 28.9 ± 3.2

1S3 Eu j 61.3±14.7 102 ±18

'“Ho 35.6 ± 4.3 92.2±27.6 150 4-20

18lTa 4.14±0.36 45.4 ± 3.7 65. 0± 5.5 146 ±12

'"Au 44.5 ± 3.6 68.4± 13.5 160 ±15

30»pb <34.3 238 ±29

20»p b 22.6 ±11.3 280 ±31

203 Bi 36.1 ±12.0 226 ±27

401

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF A 0 Vo Mitrofanova, Yu. N. Ranyuk, and P.

J. Nucl. Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, $12 (1968)

METHOD

V. Sorokin ELEM. SYM.

Au 197 79

REF. NO. 67 Mi 1 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

£il ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 - 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

Nucleus Kissionability D

Cross

section <r*. m/3

Nucleus

Kissionability D

Cross

section <rK , m/3

Bi 0.11 ±0.01 7.8±0.6 Os 0.0058 *0.0005 0.37*0.04

Pb 0.050*0.004 3.4±0.3 Re 0.0056 *0.0006 0.35*0,04

T1 o.o.il ± 0.001 2,1 ±0,2 Ta 0.0045 *0.0005 0.27*0.03

Au 0

.

0 1 0 ± 0 . 002 1 ,25*0.10 Hf 0.0042 *0.0004 0.25*0,03

Pt 0.012*0,002 0.80±0.08

Fig. 2. Photofission fragment yields as a function of Z*/d. The

ordinates are values of <r« in units of cm1

. FORM NBS-418

(R EV. 7.1 4-8*1 U3COMM-OC 26010-P84 PHOTOHUCLEAR DATA SHEET 402

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. Yu. N. Ranyuk and P. V. Sorokin

J. Nucl. Phys. (USSR) 37 (1967)

Sov. J. Nucl. Phys. jj , 26 (1967)

ELEM. SYM. A

Au 197 70

METHOD REF. NO.

67 Ra 2 HG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,F ABX THR-260 C 100-260 EMUI

DST

Angular distribution isotropic to 5 %.

flf. 3. Pbotofission cross lections. O-Bi, «-Pb, A-Au, APL The,carves were calculated from smoothed field curve*.

Table II

MeV

Cross section per equivalent y quantum, 10*” cm*

Bl Pb AU Pt

100 0.07+0,005 0.017+0.002 0.003+0.0005 0.0012 +0.0002

120 0.15+0.01 0.032+0.003 0.014+0.001 0.0035+0.0003

140 0.20+0.01 0.054 +0.004 0.020+0.001 0.0053+0.0006

150* 0.G1+0. 12 — — —

100 0.31+0.01 0.006+0.005 0.037+0.001 0.012 +0.0005

180 0.40+0.02 0.13+0.01 0.055+0.001 0.015+0.001

180 • 0.68+0,0!) — — —

200 0.62+0.02 0.20+0.01 0.082+0.002 0.031+0.001 200* 1.3 ±0.24 — 0.31+0.09 —

200 •• 0.7 — — —

220 0.83+0,03 0.28+0.01 0.108+0.003 0. 039+0. 001 240 1.22+0.03 0.36+0.01 0.146+0.003 0.063+0.001

240 •• 1.5 — — _

250 • 1.78+0.22 — 0.33 ±0,07 —

260

•From w. From ,M.

1.50+0,04 0.50+0.02 0.180+0.004 0.085+0.002

form NBS-418

(REV. 7-14-34) U 3 C OMM*D C 20 01.Q- Pfl/4 PHOTONUCLEAR DATA SHEET 403

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

METHOD

H. G. De Carvalho, V. Di Napoli, D. Margadonna and F. Salvetti

and K. Tesch

Nuclo Phys. A126 , 505 (1-969)

ELEM. SYM. A

Au 197

REF. NO.

69 De 1 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABY thr-999 c 1-6 ACTI

4PI

(1.0-5. 5)

-

Yield per equivalent quantum. 999 = 5.5 GEV

too

&

200

ai 1 k m„(GeV] 10

Fig. 4. See caption to fig. 1.

Cross sections per equivalent quantum for (y, n) reactions as a function of the maximum

bremsstrahiung energy. A straight line is adjusted to the experimental points by means of a least- squares fit. The indicated errors are due to the y-ray spectroscopy. The dashed line gives the result of simple estimates.

^ f 1

—I—I («) Au 197 (y, n ]

DESY

Estimates

1 i i

form NBS-418

(R EV. 7-1 4-04) U5C OMM-DC 26010-P«4 PHOTONUCLEAR DATA SHEET 404

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARD'
V. Di Napoli, D. Margadonna

J. B. Martins

Lettere al Nuovo Ciraento JL,

METHOO

F. Salvetti ? H. G, De Carvalho and

ELEM. SVM. A z

121 (1969) Au 197 79

REF. NO.

69 Di 1 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABY THR-9C0 C 400-900 ACTI

4PI

Fig. 1 . - The croaa-aectiona per equivalent quan- tum, <Tq, are plotted e». the natural logarithm of the peak onergy of tho bromsetrahlimg. Tho

straight line Is a least-aquaro fit of the exper- imental points.

Table I.

I’eak energy of cross-section per

the hremastrahlung equivalent quantum

(GcY) (mb)

0.4

1 253 ± 1

2

0.5 256 -l 13

i 0.6 260 ± 13

0.7

1 262 ± 13

1 0.8

i 263 ± 13 |

0.9 265 ± 14

1

form NBS-418

(REV. 7.I4-S4) USC OMM-DC 26 010- PS

4

PHOTONUCLEAR DATA SHEET 405

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF A. P„ Komar, B. A. Bochagov, A. A. Kotov, Yu. N. Ranyuk,

G. G. Semenchuk, G. E. Solyakin, and P. V. Sorokin

Yad. Fiz. 10, 51 (1969)

Sov. J. Nucl. Phys. _10, 30 (1970)

j ELEM. SVM. A

Au 197

RE e . NO.

69 Ko 2

79

egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYP E RANGE

CIJE SPC THR.-999 C 250-999 SC D-D DST

(1000) (1000) •

v

FIG. 2. Single-ended energy spectra of fragments from photofission of ti U

13'

, u Bi20*

, and „Au1 ”

.

999 = 1000 MEV

M.V

FIG. 4. Average total kinetic energies Ejc of fragments from photo*

fission of n U

1J*

, 83 Bi 209

, and n Au 1,T

, as a function of the heavy frag- ment muss. Pjints-experiment; solid curves- theory; dashed curves- —experiment with inclusion of a correction for neutron emission from

the fragments.

FOBM NBS-418

(REV. 7-t 4. 04) USCOMM-OC 28010-PS4

u.s. oepartmentof commerce

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 406
REF. EL EM. S YM. A

METHOCI

Yu. N. Ranyuk, V.M. Sanin, and P.V.

Ukr. Fiz. Zhur. 14, 408 (1969)

Sorokin

Au 197 79

REF. NO.

69 Ra 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F ABA 35-140 C 40-140 TRK-I 4 PI

Yields of nuclear fission reaction for Bi, Au and Pt by bremssirahlung were measured by means of solid state track detectors in the energy range from 40 to 140 MeV.

The fission threshold for these nuc>ei is higher tnan the giant resonance energy whichi

aliowed total photofission cross-sections to be calculated by the yield curves. A rapid increase of the cross-sections with the photon energy testifies to the preferencc of the statistical model within which the fission thresholds of target nuclei were

calculated. The results of the present experiment may be used to obtain information on the

photon interaction mecnanism in the energy region between the giant resonance and the* threshold of meson production where this problem is still obscure.

Puc. 2. Bnxo.an yna.MKia noaiay: O—aaiii aaHof po6oth, — aaHi poboTH (3]. Cv- uinbHi Kpn&i oaepwaHi niaroHKoio 3a $op- jiynoio (4).

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 407

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF - Ac Veyssiere, H. Beil, R„ Bergere, P. Carlos, A. Lepretre

Nuclo Phys. A159 . 561 (1970)

EL EM. SYM. A

Au 197 79

REF. NO. 70 Ve 1 egf

REACTION RESULT EXCITATION SOURCE DETECTOR

ENERGY TYPE RANGE TYPE r an ge angle

G.N 33* ABX 8-26 D 7- 36 BF3-I 4PI

G ,2N 33 S ABX 14-27 D 7-36 BF3-I 4PI

G.3N 33b"T ABX 24-27 D 7-36 BF3-I 4PI

33 V +

Fig. 2. Partial photoneutron cross sections Oy.n, 0y, : and a

y

t of ’’’Au.Wc also show the descend*

ing part of the unique Lorcntz line corresponding to parameters given in table 3.

Table 5

Integrated cross sections and sunt rule values of J °*Pb and 197 Au. The notation used is defined

in the text

Refs. £*

(MeV)

Oo (MeV • b) (MeV b )

a0A

0.06 NZ

<To'«4 0.06 NZ (mb)

<7-2 (mb - MeV” 1 )

*) 22 4. 10 ±0.06 5.10 1.37 1.71 280 20.5 I0«pb 28 2.91 ±0.29 2.94 0.98 0.99 14. 1 ±1.4 21

) 23 3.91-0.59 5.18 1.31 1.74 18.6 ±2.4

present work 25 3.4S ±0.23 4.00 1.17 1.34 251 ±20 19.1 ±2

‘) 22 3.00-0.05 3.99 1.06 1.40 200 14 ,97 Au ») 25 2.97±0.3 3.53 1.05 1.24 15.3± 1.5 present work 25 3.48 ±0.2 4.07 1.23 1.42 238 ±20 17.2±2

X J. Miller, C.Schuhl and C. Tzara, Nucl.Phys.^2 (1962)236.

S R.R .Harvey, J.T. Caldwell, R.L. Bramblett and S.C. Fultz,

Phys. Rev. JJ6 (1964)B126.

9 S.C. Fultz, R.L. Bramblett, J.T. Caldwell and N.A. Kerr,

Phys. Rev. JL27, (1962)1273. 23T.Tomiraasu, J. Phys. Soc. Jap. 2£ (1968)655.

[over]

form NBS-418

(R EV . 7-1 4-04) use OMM-DC 26 010- P6 4 PH0T0NUCLEAR DATA SHEET 408

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARO'
Fig. 4. Total photonuclear cross section ay-T (E) of 1,7 Au and best Lorcntz line fit corresponding to parameters given in table 3.

409
ref. . V. Di Napoli, A.M. Lacerenza, D. Margadonna,

H.G. De Carvalho, J. Benuzzi Martins

Lettere al Nuovo Cimento _1, 65 (1971)

METHOD

F. Salvetti

79

71 Di 1

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE range TYPE RANGE

G.N ABY 8-999 c 300-999 ACTI

/PT

G.2N ABY 15-999 c 300-999 ACT- I ZPT

Note: Text says Fig. 2 gives (y,2n) yield. 999 = 1 GEV

Kiar- t . - "'Au(t, i) ,mAu reaction cross-sections per equivalent quantum are plotted e». the natural logarithm of the brcmastrahlung maximum energy, a) • present work, collimated beam (8 mm collimator):

lj) a present work, uncolllmutcd beam: c) Orsay (•): d) a DKrtV (*): e) o Li.nihjrkx und Jox.tsox, Lund ('). ^K. Lindgren and G. Jonsson: Annual Report 1969 . University of Lund,

Lund Institute of Technology, Sect. jjA: 2b (Lund, 1970).

bremsstrahlung energy (GeV)

Filf. 2. - ,#, Au(r. Q) ,mAu reaction cro^*»oction8 per equivalent quautum are plotted va. tlie naturnl logarithm of the brumwitrahlung maximum energy, a) o Krancatl data, unooillniutcd )H*uin; b) a Ornay

data, uncollifriuLed heuiu.

form NB$°418

(REV. 7® 1 4® 04) U3COMM.OC 26010-P04 PHOTONUCLEAR DATA SHEET 410

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. V. Di Napoli, D. Margadonna, F. Salvetti, H.G. De Carvalho,

J.B. Martins

Nucl . Inst. Meth. 93, 77 (1971)

ELEM. SYM.

Au

A

197

z

79

METHOD REF. NO.

71 Di 5

: hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE R AN GE G,N ABY 8-999 C 300-999 ACT1

4PI

'he use of the

^ 9 F(Y,n A, 27

Al(y,x) 24

Na,

19 7Au(Y,n) 196

Au, and 12

C(Y,x)

7 Be

reactions as absolute monitors for high-energy, high-intensity bremsstrahl ung 999 = l GEV

beams is discussed. The cross sections per equivalent quantum and the absolute

cross sections, in the energy range 300-1000 MeV, are reported for these reactions.

19 18 27 24 1? 7 F(Y,n) F, Al(Y,x) Na , and C(Y,x) Be reactions are proposed as very simple

and suitable systems for monitoring purposes.

- 400,

E 300—

g 200 -

1001

! 0 > —* . .

. . .

. 1 too 200 300 500 700 1000

Bremsstraniung energy (MeV)

Fig. 3. I97 Au—

»

190 Au reaction cross sections per e.q. Fir. triangles, present work, uncollimated beam: circles: prey, work, collimated beam; squares: Orsay3

); open triang;. DESY11

). The dashed line represents a constant value ol' -60 rr

Table 2

Energy (MeV)

19 F—>- 18 F

<TQ(mb)

27A|_>24 Na 197 Au_^196Au» 12C^7Be.

260 270+ 14 300 5.90+0.20 0.37+0.01 258+13 0.37 ±0.01

320 0.39+0.01

350 5.90+0.20 0.39 +0.01 0.38+0.01

380 5.95 +0.20 0.41+0.01

400 0.42 +0.01 420 0.45+0.01

450 5.95-0.20 0.48 +0.01 249+12 0.44-0.02

500 6.65-0.20 0.49 +0.01 550 6.65 — 0.20 0.50 +0.02 0.47±0.02

600 6.80 =0.20 0.52+0.02

650 0.52-0.02 266-13 0.47-0.02

700 7.20 —0.30 0.56 —0.02 750 0.55-0.02

850 7.60-0.30 0.60 — 0.02 246-12 0.49-0.03

900 0.59 + 0.02 1000 7.10-0.30 0.66-0.02 249-12 0.51 —0.03

4 The values given in the last two columns are, in most cases, an average ol two or more measurements (see rigs. 3 and 4).

form N3S-418

(R EV. 7-1 4-641 USC OMM-N BS-0 C PHOTONUCLEAR DATA SHEET 411

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDAROS
REF. Vo Emma, S. Lo Nigro and C. Mi lone

Letters al Nuovo Gimento 2, 271 (1971)

ELEM. SYM.

Au 197 79

METHOD REF. NO. 71 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,F ABY THR-999 C 300-999 FRAG -I 4 PI

L

3

-

i '

.a-

,.!-t

, Tl

9 * H°

999 = 1000 MEV

I* 1

Au

* :>-?V *

r

i

i

j

200 400 600 800 £ (MeV) Uai

1000 1200

Fig. 1. - Photofission cross-sections per equivalent quantum aQ against the maximum energy of photons. Au: o ref. (*), a ref. (•), our results; Jiff: • our results; Tl: a ref. (•), a our results. The hashed

curve* represent the fits calculated by the least-squares method taking into account our result* only.

A 1000 /£ d00 // £

600 // /

£

$00

'' // 400

' / 300

Au Hg Tl Pb 0i

79 80 81 82 82 7

Fig. ’1. - ^-values, deduced in our present ami previous (*) experiments, reported r*. the atomic number X of the elements for only some energy values.

(over)

form NBS-418

(REV. 7-14.64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 412

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
V tlll.K 1, /«

/•' ins inn eroKM -seel inns *' lirl ii'rrn IHMI nml !»*••*» U>A .

-

,,,111111) - — '

i hie rcHtillrt I'll'VIHilH 1 7.H o.js <•*/ IU 7.H i u.

J

7.H • ii.ll (“)

ri» :t.:t o. i :t. t •».:$ (“)

tl i.ii j u.i 2.1 <1.2 ( n

)

-

11 s'

l * 3 = tU —

All 1.19 ± 0.06 1.25 D.l (“)

4f

a Tl

c Jj

F, ti

1 >- i 1 l I #1 1 i i 1 -j

Hg j-

'

1

1

|

1 1

1 IIft!"

.

' T t * qU-j. i.i - 1 *-1 —i1 1 1 •—i1—uJ1 200 400 600 800 1000 E (MeV)

l M«i

I'iif. Ki.-wimi omss-Hoctloli |ht photon "t of Tl, llir Hint All intniliHt Thu dimlici nlnutria

line* represent the vulues a* = const, calculated ON sum/csted iu ref. (•).

10

b*

..ti W Os

Hf Ta Wo

Pt

10 29 30

Hg Pb

Au n

32 z

2Ia

t iif. (. - <7t-Vttliics vs. X‘/.l for the elements with atomic number la the range from 72

results, a ret. (•), o ref. (•). The dashed curves is drawn by cyo.

i') \*. KMMt, ?*• l.o Nitoio mol Mimink: Hull. .s',/. A'.. No. in, liu , IWTiti.

i*) V. Kmvia, !•, li«> Niniin jimi 1', .MiuiXK; Ixll. Xiitirn ( 'i nir nhi, fl, i J llltiil), (•) V. KtiM.li .*. I.o Nioiio ami .Miui.sk: Isll. .Viinrn Ciwrnbi, 2. 117 IIU71).

(•/ J. JrxoKMMAX anil 11. .M. Stkixku: l‘hu*. Hr*., 1M, (10A7).

(•» if. lot Caiivausi, (i. Coim.xi. K. Iiki. liit'iiicn, 11, I'OTK.XXA Hint It. I(i.x>uvii.ui: Xanm I'imrslu,

22. VJ2 (11/04).

t*/ A. V. Mitiuu/aXOVa. YU. N. Uaxyuk and 1*. V. Sohoki.x : Hot. Jmurm. Xitel. 1‘kys., 6, Hi (lUl.N),

413
K» Lindgren and G. G. Jonsson

Nuclo Phys. Al66, 643 (1971)

MFTHOO

j EL EM. SVM. A z

I

| Aa

RE r . NO.

197 79

fe- ll Li 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

type range TYPE R AN GE G,YN ABY THR-900 C 75-900 ACT- I 4PI

Y = 1,2,3,4,5,7,9,11,13,15.

too sob iooo BremsstraNung energy (MeV)

Fig. 3. Yield curves for the reactions (y, n), (•/, 2n), (y, 3n) and (y, 5n). q this work, 9 Frascati collimated beam, A Frascati uncollimated beam, Orsay uncollimatcd beam, A DESY collimated beam.

Fig. 6. Yield curves for the reactions (y, 2n)“ and (y, 4n)“ [overj

form NBS-418

(REV. 7-1 4-641 USC OMM. O C 2SO t 0- PS 4 PH0TQNUCLEAR DATA SHEET 414

u.s. oepartmentof commerce

NATIONAL BUREAU OF STANDARDS
Number ot neutrons emitted

the calculated cross sections from different cascade data.

Fig. 8. Tho total cross section and tho total integrated cross section

for all tho (y, xn) reactions studied. Tho dashed region shows the in- tegrated cross section at tho pion threshold given by tho Gell-Mann sum rule.

Table 2

Experimental high-energy (y, xn) mean cross sections in the energy region 300-900 MeV togethet with calculated cross sections and the partial fission cross sections obtained

Isotope <r„,(mb) ffu‘i,(mb) 5f (mb)

«»*AU 4 ±2

(1.8 ±0.8)

1,5 Au 2 ±2 0.51

l **Au 1.5 ±0.4 0.56 >”Au 0.87 ±0.20 0.80 **®Au 0.84±0.17 0.87 0.03 ‘"Au 0.63±0.15 0.82 0.19

1,4Au 0.32 ±0.07 0.69 0.37

l,4Au 0.09 ±0.03 0.34 0.25 '•‘Au 0.03 ±0.02 0.04 0.01 415
REr - T® Methasiri and S. A® E. Johansson

Nucl® Phys® A167 . 97 (1971)

ELEM. SYM. A

Au 197 79

REE. NO. 71 Me 1 egf

EXCITATION ENERGY

SOURCE OETECTOR

REACTION RESULT TYPE RANGE TYPE RANGE

ANGLE

G.F ABY THR-900 C 300-900 FRG-1 4PI

Table 1 The constant fission cross sections above the threshold

Element <7, (cm*) Element <7, (cm1

)

Pb (5.0i0.2)xl0-*7 La (1.1 ±0.1) x 10' 2 * Au (!.7±0.I)xl0- 1T Sn (4.3 ± 1 .1 ) x 10“** T» (3.3 ±0.2) x 10- *• Ag (8.4±2.0)x 10“** Yb (1.2 ±0.2) x 10* 2i Mo (1.7 ±0.4) x lO"** Ho (5.5±0.3)xl0- 2 » Cu (6.6±1.2)xl0- ,# Gd (5.3±0.8)xl0- I» Ni (5.8±0.1) x lO" 1 * Nd (1.3 ±0.2) x 10-**

[over]

form N8S-418

(R EV. 7.1 4.S4) USCOMM.OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 416

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARC"
(a) (b)

(c) (d)

(e) (O

Fig e l e Cross sections per equivalent

quantum d (E) as a function of log E»

417
REF. Tatsuya Salto

Nippon Kagaku Zasshi 92, 164 (1971)

EL EM. SYM.

Au

A

197

Z

79

METHOD REF. NO.

71 Sa i egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

TYPE RANGE TYPE RANGE ANGLE

G,N ABY 8-68 C 10-68 ACT-I 4 PI

Nippon Kogoini ZasiM. 92. l64-'-l68(197l) The Yields of Radioactivities Induced by (j*, it) Reaction*

with Bremsstrahlung up to 68 M«V

by Totsuvo SAITO

Tlie (y, ») yields of 12 target nuclides have been measured

at 10, 13, 16, 30, 45 and 66 MeV bremsstrahlung by oliscrv- ing site induced artivilics.

'I'lie energy dependence of (lie yields has been investigated

extensively in tire same way as in tlie previous work at 20 MeV hretnsstralilung. In tlie rase «if heavy nurlides, tin: yields rise greatly as a function of maximum bombarding energy up to 20 MeV, and

rise gradually from 20 MeV up to 66 MeV. However, in the ease of light nuclides, the yields rise greatly up to 30 MeV, because

the neutron separation energies of light ones are larger than

those of heavy ones, and tlie bremsstrahlung spectrum covers

the giant rcsdnance ana to the yields rise gradually from 30 MeV up to 66 MeV.

The yields have approximately been, estimated from the parameter of the giant resonance, that is tlie peak cross section and the half width, in order tu ciitii|Ktrc with tlie ex|»-i nnrnul

data. As a result, tlie experimental data of light nuclides anil heavy ones are nearly in agreement with tlie estimated data

of Nathans et al., Johns ct al. and Montaibetti ct ah, but lliusc of medium weight ones are relatively lower values. Department tf Chtmuiry, Faculty of Sennet, Tthaku Unioeruty

;

Katakira-cho, SanJai-iM, Japan

V\ ill yz * * +' —

I: '"AuCy, »)"*Au, I; ,n l (f, »)it»f I: **Mn(y, «)"Mn, IV : uNa(y,a)«Na

T: '•0(j%«)<»0, X: 'tC(r.»)"C

35 3

a t- * *;• •: Tttifl. ©: Johns t,. 3t Nathans t> s Q: Monlalbrtti F>

form N3S-418

(R EV. 7-1 4-641 USC OMM-DC 260I0-P64 PH0T0NUCLEAR DATA SHEET 418

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
G.A. Vartapetyan, N.A. Demekhina, V. I. Kasilov, Yu. N. Ranyuk,

P.V. Sorokin and A.G. Khudaverdyan

Yad. Fiz. 14, 65 (1971)

Spy. J. Nucl. Phys. 14, 37 (1972)

EL EM. S YM.

Au 197 79

METHOD REF. NO.

71 Va 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE type R an g e

G.F ABX 100-999 c 100-999 TRK-I 4 PI

999 = 5 GEV

Riotufluiuo jrMldi par in' par aqiuralaaf pTuxoa

E u*v

l*-* L'

/J* Tl»--

1 Alt - T«-

ICO (226120) 10-“ (120 -12) -10 » (50=5) 10-° 10.70-0(8*) nr-» (10=0.41 IO'*

IJ«» ( 1 5-H2I IO-» (14 = 0.2! 10-

MO

(240- 20)- 10-°

(2.0 = 0.2) 10 » (2.0-*-0‘j) 10-*

150 (61*7) 10 ”

lOO (3.1 1 P.3) 10-® (3.7=041 IO

l/*0 (265* 30) IO-"

(4.6 *i* 5) 10 " (5.5*Pb) IO- *

( 150= IS) - IO~f (72 = 7) IO-f (0.1 *0.6) m * (8.2 = 0211 iO " (4.9*05) 10 2Ju 18.3*0.8) 10 • <1.1 *0.1) IO-® (62 = 0.8) * 10'*

• 40

.‘•5

( 156 -t 16) • IO- ®

((.2 = 0.1) 10-F (15 = 0.2) -10 (l^ = 0.l) I0-*

.60 115=11.2110-” (I.J*±0.?)< !0-* f 16=0.2) -10-R

2.ri» (160-16) IO-f (85 = 9) IO ” U2s 0 2) 10- 37 (2 3 = 0.2) IO-*

(3.5*0 4) lo 17 (4.4*04) • If)-*

,n- (318* 30) IO -77

1 175 = 20) l»- r

(4 2 =0.4) !U *' <"- n -t0.5l -)-«

<106= II) -IO-®

io.4*0.5) !•» 37 (70=0 71 :0-»

4 - ib.'J • * 7) • !'> •*' «o.7 *0.7) IO *• 1.9 1 =•••-’) •< *

r * • '!l5=l2)-‘0 -7 .* « » 0 7] III F ('M:* 1) l'* *

•346 r35J- 10-2"

a) i ;.a * "

1 1.7=02) .:o-»

3

• m j- -T * 11 . ' /

1

( ! .

* * «.» 1 » r

,, !f>

* (120 L 12) lo- "

5 <• 77

t 1.3 * 0 I ill -

5«* C 3 • U") 10 "

( 1.2 * • ! •> "

(2.4 = 032) 10 " n

( JS6+ 40) • 10 *

<-* JO - ."J)- *o - (136* M) • J0- r

1 !i» i - it jo :r II** •».„') 'J '

ii (2.4 = 23) -10 ” (144# t 14) 10 37 (2.9 = OJ) 10 (11.3=1.1) IU F ((.9=0.2) (o-r.

(4»«)i.4*J) 10 ?r

j. 1*0*40) • I0' ,r (217 = 23) -10-" ( 136 = 1 4) - IO* 1

'

! 1 7c (liS=IJ)-IO F (1.9-eiU) nr"

(13 = 0,3) ^0- ,, VI70 (13J=l.4)!(r“ (2.1 =0.2) IO-f

: jju !'7-, = 40) - 10-” (103 ±20) • 10 37 (152=15) 10 f mm# 114.3=14) IO-F ( 2. 0 *0. 2 * • !o~ r

!5U> 445*45) • 10 17 i238 = .4) io- w (155- 151 -IO--" 1570 4 13 .Qs 1.4) • :<» r 2.1 • -.2' -Cl

t Mi 45) • 2*) r 'jo7 *.!)•: o i: M40r 1

4

f IP

- 15.5 - ! 6' • :»• 37

.4 t* (llSsrajl lO-’7 1242 = 24)10-* ( 155-16) IO* 7

'

• i'KItJh 10 ~

(2 (5 -.25) 10 " ( 15^ j- 15) • 10 • • Itf. ! - •..«•» !

• ! ' 2. .- -r

..1 1 '

'

lo.> r4j) ' 11 * i2j.’ - 231 10 17

. (46=151-10 ' 0«'*5t> • (25l—23i • !<’- (148- 15) • I0- r 13.0 = 0.3) • :t?- r (6.4 j-U.6) • :o-*

. \yj iij.’i • 6' :u

-

f J.*>r0.3» (6.bs:y.7) lo-*

4 5* A! i”\) -S') iO- 37 (204x27) • 10- r Il83±l8).|0- r

(4 - - * 5o* I"

- - l-'N»* J5j • 10 37

1 20.2 = 21 IO' r .<• r 0.8-0.71 :o--* A» V ( 4S*5 - V) U; r 274-281 10- r <2>i6-21)I0-f iA'.r.>! • 10* '* '"- :T

• 6.3 r*’.6) 10-**

FIG. J. Solid heavy curve- photofission cross section o;' Be01*. Ta 1 " 1 Dashed curve-the same cross section, integrated oser the serif:' bremsstrahlung spectrum (yield per equivalent photon <*s a I'unuior. bremsstrahlung maximum energy). Thin line -cross section tor yp in- teraction. multiplied by the number of nucleons in the nucleus and by

the fis&iiity. form N3S-418

(R EV. 7-1 4.84) USC OMM.QC 2801 0-P64 PHOTONUCLEAR DATA SHEET 419

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Gc Andex s son , I. Blomqvist, B. Forfcman , G.

REF- I. Kroon, K. Lindgren and B. Schroder

Nuelc PhySo A197, 44 (1972)

METHOD

G, Jonsson, A. Jarund,

ELEM. SYM.

Au 197 79

REF. NO.

7 2 An 8 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,XN ABX 1- 7 G 1-7 ACT -I 4PI

G,F ABX 1- 7 G 1-7 ACT-I 4PI

ENERGIES GEV X=l-ll

Figs. 12-14. Yields and cross sections for the 197 An(y, xn) reactions studied. Open circles from

this work and filled circles from ref. * 3

). The solid curves show the cross sections and the hatched

areas indicate the errors.

Table 3 Experimental mean photofission cross sections af (mb) from refs. ’• lS>31

) compared to the results of the present work

Present work

0.3-7.4 GeV

Ref. *•) 0.3-0.9 GeV

Ref. 31

) 0.3-1. 0 GeV

Ref. 3

) 0.3-1. 6 GeV

Au 1.44 ±0.10 1.7 ±0.1 1 . 1 9 ±0.06 1.25 ±0.1 Pb 3.8 ±0.3 5.0 ±0.2 3.3 ±0.1 3.4 ±0.3 (over)

form N3S-418

IR e V. 7-1 4-841 DSC OMM-N 9S-OC PHOTONUCLEAR DATA SHEET 420

U.S. DEPARTMENT OF COMMERCE

NATION AL BUREAU OF STANDARDS
Table 6

Partial reaction cross sections relative to the total photoabsorption cross section, (in %)

Reaction 0.3 GeV 1.0 GeV 5.0 GeV

12C(y, n) 10 ± 5 6.8 ± 3.4 0 ± 5

27A\(y,7t*) 0.2 i 0.1 0.1 ± 0.1 0.04 ± 0.02

(

'/

,

2pn) 1.7 ± 0.9 1.5± 0.8 1.7 ± 0.6

l27 I(-/, 3n) 1.6± 0.8 0 ± 3 5.5 ± 2.8

(7, 6n) 0.9 ± 0.5 1.2± 0.6 1.5 0.8

(7. 7n) 0.9 ± 0.5 0.5 ± 0.3 0.1 ± 0.1

(7. 8n) 0.7± 0.4 0.6 ± 0.3 0.4 ± 0.2

(7, 9") 0.3 ± 0.2 0.2 ± 0.1 0.5 4- 0.3 S(7, *n) 4.4 ± 2.2 2.6 ± 1.3 7.8 ± 3.9

(7. P5n) 1.7 ± 0.9 1.7 ± 0.9 0.9 ± 0.5

(y. P^n) 1.9± 1.0 2.1 ± 1.1 0.9 ±0.5

(y, P^n) 1.6± 0.8 1.6± 0.8 1.3 ± 0.7 E(y, pxn) 5.2± 2.6 5.4 ± 2.7 3.1 ± 1.6

(y, 2p3n) 0.6 ± 0.3 0.3 ± 0.2 0.3 ± 0.2

(y, 2p5n) 0.5 ± 0.3 0.6 ± 0.3 0.8 4- 0.4

(y, 2p7n) 1.3 ± 0.7 1.0 ± 0.5 0.4 ± 0.2

(y, 2p9n) 1.1 ± 0.6 1.7 ± 0.9 2.4 ± 1.2

(>'. 2pl0n) 2.7 ± 1.4 1.9± 1.0 5.0 4- 2.5 2(y, 2pxn) 6.3 i 3.2 5.6 ± 2.8 8.8 ± 4.4

(y, 4pl2n) 1.5 ± 0.8 2.4 ± 1.2 2.0 ± 1.0

(y, 4pl4n) 0.8 ± 0.4 1.9± 1.0 2.5 ± 1.3

(y, 4pl5n) 0.4 ± 0.2 0.6 ± 0.3 1.5 ± 0.8 -(y, 4pxn) 2.7 ± 1.4 4.9 ± 2.5 . 6.0 ± 3.0

(y, 6pl7n) 0.5 ± 0.3 1.5 ± 0.8

(y, 6pl8n) 0.1 £ 0.1 0.2± 0.1 0.1 ± 0.1 —(y. op.rn) 0.1 ± 0.1 0.7± 0.4 1.6 ± 0.8

(y, 8pl8n) 0.8 ± 0.4 2.5 ± 1.3 -(y, >P*n) 19 ±10 20 ±10 30 ±15

197Au(y, 3n) 0.9 ± 0.5 2.2 ± 1.1 1.5 ± 0.8

(y. 7n) 0.8 ± 0.4 1.3 ± 0.7 2.4 ± 1.2

(y» 9n) 0.8 ± 0.4 0.6 ± 0.3 0.3 ± 0.2

(y. Hn) 0.4 ± 0.2 0.9 ± 0.5 0.5 ± 0.3 £<y.*n) 2.9 ± 1.5 5.1 ± 2.6 4.6 ± 2.3 Au(y, f) 1.5± 0.4 2.7 ± 0.7 6.9 ± 2.0

Pb(y, f

)

3.1 ± 0.8 6.9 ± 1.7 17 ±5

(qtu) uoipas ssoo

Fig. 17. The gold and lead photofission cross sections per equivalent quantum <r, as a function cf bremsstrahlung peak energy £mal . The filled points are taken from our earlier experiment l9

>.

Fig.

14.

See

caption

to

fig12.
ref. W. C. Barber, E. Hayward, J. Sazama

PIGNS“72, p. 313 Sendai

EL EM. SYM.

Au 197 79

METHOD REF. NO.

7 2 Ba 16 hvm

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

$ G,G RLX 15.1 D 15. 1 NAI-D 90

_ (do-/dQ)|| to polarization vector

(dcr/dQ) x to polarization vector

POL G; ALSO a/

Table 1. Results and. Comparison with Theory

Target

da\ (Arbitrary

Units) n(exp) n(DCM) n(HD)

Cd 0.39±0.05 0.09+0.08 0.19 0 Sn 0.65+0.06 0.11+0.06 0.067 0 Ta 1 . 74±0. 14 0.14±0.07 0.180 0.155

Au 2.08±0.15 0.17±0.06 0.067 0

Bi 2 . 65±0 . 26 0.02±0.06 0 0

form N3S-418

<R EV. 7-14.041 USCOMM-NBS-DC PHOTONUCIEAR DATA SHEET 122

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3T ANOAROS
P. David, J. Debrus, U. Kim, G. Kumbartzki, H. Mommsen, W.

K. H. Speidel and G. Stein

Nucl. Phys. A197 , 163 (1972)

METHOO

Soyez

,

EL EM. SYM. A Z

Au

REF. NO.

197 79

7 2 Da 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE type r an g e G,F ABY THR-999 G 800-999 TRK-I DST

4

i

999=2. 2 GEV

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 423

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
N„A„ Demekhina, V. I. Kasilov, A. V. Mitrofanova, Yu. N. Ranyuk,

and P. V. Sorokin

Yad. Fiz. 16, 911 (1972)

Sov. J. Nucl. Phys. 16. 502 (1973)

ELEM. SYM. A

Au 197 79

METHOD REF. NO.

72 De 12 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE ANGLE type range

G=F NQX THR* 4 C 0* 4 TRK-I DST

da/dO ~ 1+2 v/V cos0 - P sin Q

f ENERGIES IN GEV

css 9 FIG. 2. Angular distributions of fragments from fission of U (a) and Au (b).

Table H

Dement ^7 max* MeV X

1 ,

[ o-2r/V «-:r;l-|“l

3000 0.16 0.09 -0.C3 1+0.025 uTM 3*00 0.55 0.85 0.013+0.017

5100 0.59 0.85 0.040 +0 017

700 0.93 0.45 0.155=0.017 moo 1.14 0.3 “0.1 >5^0.0 17 Bi35* 1200 C.75 0.6 0 094—0.020

1300 091 0.4 0.093+0.018

1460 0.62 0.65 0.Co4— U.OIS GjO o.o°:-o.oio

450 0-i. -5-0.010 GfO 0.099-0.010 645 0.87 0.55 0.054+0.016

700 0.116-0.010

800 0.45 0.95 0.005 =0.020 Au 1 " 850 0.121-0.010

9C0 4S0- 0.001 0.124+0.018

ICC0 0.95 0.4 0.101 -0.017 0.090 -0010

13C0 0.v87 0.4 0.094 -0.017

I4C0 0.90 0.5 0.075 -0.018

3000 1.34 0.15 C.122+0.017

3800 0.7 0.65 0.093=0.17

600 0.8 0.5 0.087=0.018

700 0.147+0.010 Ta'“ 1145 5.2 0.001 0.144=0.018

1480 1.25 0.15 0.127-0.013

5100 2.02 0001 0.200 =0.020

v.tMeV/

nucleon)^ «. MeV

0.042 =0.005 O.OI8+0;fW2

o.o54=o.oo6

u.o9i=o.cc9 o.047=n 00o

0.055 +0.006

0.055 =0.005

C. 160—0.GOO

0.045='.' ,:.«?5

| 0.006=0,031

0.65; =0.052

0.200=0.023 0.3i4=9.C30 0.314=0 C20

O.02L’=0.0C2 0.040=0.004

0.044=0.004 0.132=0.015

0.00.5=0.001 0.020 =0 002

0.064 +0.005

0.052=0.005

0.049+0.005 0.059=0.004

0.665 =0.006

0.048+ 0.005

0.400 =0.040 0262=0.025

0.234=0.024

0. >47—0 0! 5 0 410 =0 040 0.223=0.022

0.044=0.004 0.176=0.018

0.072 =0.00 7 0.463 =0.047

0.004 =0.006 0.370 =0.037

0.160=0.010 1 O.SoO =0.090 Nme. x

2

is the value of x

2 per degree of freedom, wfx* ~Yq) is the probability of the

value of x

2

. a = 2v/V is the anisotropy coefficient, e is die fissioning-nucleus kinetic energy, v is the fissioning-nudeus velocity.

FIG. 3. Anisotropy coefficent as a function of target-ni^leus atomic number. Points: O-results of the present work, A-resuits of Kroon and Forkman [ 16

)

.

form N3S-418

(R EV. 7-1 4- 04 ) USC OMM-OC 29 010- PSA PHOTONUCLEAR DATA SHEET 424

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. I. Kroon and B. Forkman

Nucl. Phys. A179 , 141 (1972)

METHOD

ELEM. SYM.

Au 197

REF. NO.

72 Kr 3

79

egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYp E range

G ,F ABY THR-999 C 350-999 TRK-I DST

1.2

1.0

08

Au 999 = 1 GEV

Fig. 3. Angular distributions for gold analogous to those given in fig. 2 for lead.

Table 1 Ratios between the number of fragments in the forward and backward directions recorded in glass

detectors. N, \

Element Present work Proton sandwich

experiment') from angular sandwich

distribution*) experiment*)

Ta 1.29 ±0.04 Re 1.42 ±0.08 Au 1.19 ±0.02 1.20 ±001 1.45 ±0.07 Pb 1.11 ±0.02 1.13 ±0.01 1.61 ±0.15 “•U 1.26 ±0.05

') Ratios calculated from (he angular distributions at ‘'CtiMcV.

*) Ratios obtained with the sandwich technique. 700 MeV for Au and Pb, 800 MeV for Ta. form N3S-418 *) From ref. *). Proton induced fission at proton energ> KO MeV. USCOMM-OC 260I0-PS4 PH0T0NUCLEAR DATA SHEET 425

(over

)

. DEPARTMENTOF COMMERCE

ONAL BUREAU OF STANDARDS
Figs. ? and 6. The lead and gold photofission cross section per equivalent quantum as a function of bremv

strahlung energy calculated from the number of fission fragment tracks in the forward glass plate (full curve). The corrected cross sections are also shown (dashed curve).

200 COO 600 800 Bremsstrohlunq energy (Metfl

Fig. 4. The tantalum, gold and lead forward-to-hackward ratios as a function of hremsstrahlung energy.

9

V. A. Kon'shin, E. S. Matusevich, V. I. Regushevskii,

Sov. J. Nucl. Phys. 2 , 489 (1966).

426
J. 0. Adler, G. Andersson and H. A. Gustafsson

REF. PICNS-73, Vol.II, p. 993 (1973) Asllomar

METHOD

EL EM. SYM. A

Au

REF. NO.

197

z

79

7 3 Ad 3 egf

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,A SPC 0-500 G 500 TEL-D dst

60 90 no

9ia* (D*gr*»»)

Fig 2 shows the experimental

angular distribution together

with the results from cascadeevaporation calculations

(solid curve). The calculated

curve has been fitted to the

experimental points between

120 and 150°.

Both fig 1 and fig 2 seem to

indicate that there is a small

contribution of directlyemitted ct-particles in the

yield. From fig 1 we estimate

this contribution at (13 ± 1 )% and from fig 2 at (15 ± 2 )%.

Fig 1 shows the ct-energy spectrum resulting when

all the nine measurements are added together.

form N3S-418

(REV. 7.14.A4I USC OMM-N BS-0 C PHOTONUCLEAR DATA SHEET 427

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. RoF. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nucl. Phys. A210 , 355 (1973)

METHOD

I tu cM. jYM. A

Au 197 79

REF. NO.

73 Ba 20 egf

reaction RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N NOX THR- 27 C 10- 27 BF3-I 4PI

Fig. 12. Experimental values of the level density parameter a, (Fermi gas formula plus pairing correction) versus atomic number A. The continuous curve is a least-squares fit to the data of a

theoretical calculation from Newton 13

).

MEAN NEUT ENERGY

1

H. Baba and S. Baba, Japan Atomic

Energy Research Institute report

JAERI-1183 (1969).

2 H. Baba, Nucl. Phys. A159 , 625

(1970).

15

T.D. Newton, Can. J. Phys. 34 , 804 (1956).

Fig. 15. Ratio aMla9 versus atomic number A. Here aobt is the level density parameter taken from

the neutron resonance work of refs. '• J

), and a9

is the level density parameter derived from the present (y, n) work. Filled circles represent points where nuclei in the neutron resonance and in the

(y, n) experiment were the same. Open circles represent points where the respective nuclei were approximately matched. Triangles represent points which are based on measurement of neutron mean energies at two bremsstrahlung energies only. (over)

form N3S-418

(R EV. 7-1 4-841 USCOMM-OC 28010-P84 PHOTONUCLEAR DATA SHEET 428

U.S. DEPARTMENTOF COMMERCE

national, bureau of standards
Table 3 (continued)

Target N

(residual nucleus) *)

Goodness

of fit s

) no with

p.c. p.c.

£.(24) T

(MeV)°) (MeV) 4

)

“p (MeV" 1 )') (MeV” 1 )

1)

o«tJap

Ba 75 1% F 1.16 16.5- l3 *Ba 15.39-l3sBa 0.93 77 2%

78 7%

79 8%

80 11%

81 71%

La 80 100% F F 1.25 0.72 15.5-' 38 La 13.76-139La 0.89 Ce 81 89% F G 1.24 0.70 17.0-‘ 39Ce 17.8 -14, Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-' 4OPr 17.05-'*2 Pr 1.00 Tb *) 93 100% 1.15 19.3-' S8Tb 2I.85-“°Tb 1.14 Dy *) 93 2% 1.06 20.9-“'- s Dy 21.9 - l62 Dy 1.05 94 19%

95 25%

96 25%

97 28%

Ho 97 100% P G 1.06 0.56 21.4-“*Ho 20.66-“6 Ho 0.97 Er «) 95 2% 1.11 19.2-“6 Er 21.9 -l6S Er 1.14 97 33%

98 23%

99 27%

101 15%

Tm *) 99 100% 1.03 24.0-“ sTm 22.58-' 7 °Tm 0.94 Ta 107 100% G 1.00 0.49 26.0- laoTa 21.2 -,81Ta 0.82 W 107 26% G F 0.98 0.50 27.0- 183 W 23.0 -183 W 0.85 108 14%

109 31%

111 28%

Au 117 100% G 1.19 17.5-' 96 Au 20.24—,98 Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-206Pb 10.1 -207 Pb 1.35 (Z = 82) 124 23%

125 52%

Bi 125 100% F 1.65 1.03 9.0-208 Bi 13.3 -2 '°Bi 1.53

') Neutron numbers and abundances of respective residual nuclei in (y, n) experiments.

b

) These give an assessment of the goodness of fit of a calculated £„ versus E0 curve to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

c

) Bremsstrahlung photoneutron mean energies £n for peak bremsstrahlung energy E0 = 24 MeV.

4

) Nuclear temperature from fit with constant-temperature formula.

*) Level density parameter av derived from the present (y, n) experiment, using a Fermi gas formula plus pairing correction, and corresponding residual nucleus (the atomic weight shown is the weighted average of atomic weights of the respective isotopes present).

f ) As column 7, but using data on n-resonance absorption from refs. ,-2

). *) Measurements of £„(£,) for these nuclei were made only for £0 = 21, 23 and 24 MeV.

429
F.R„ Buskirk, H. D. Graf, R. Pitthan, H. Theissen, 0. Titze,

REF and Th„ Walcher

PXCNS-73, Vol.I, p.703 Asilomar

ELEM. SYM.

Au 197 - 79

REF. NO.

73 Bu 14 hmg

REACTION

E,E/

RESULT

SPG

excitation ENERGY

2 - 20

SOURCE

50, 65

OETECTOR

MAG-D DST

Fig. 1

for the nuclei

The E2 resonance which is

clearly visible at lo. 8-o.2 MeV

exhausts more than 5o % of the sum

rule. Fig. 2 shows the excitation

energy of this resonance as a function of

measured at Darmstadt and the Sendai result for ^°Zr . Bohr and

Mottelson 19" predicted a collective E2 resonance whose isoscalar

part should depend on A through E =58 A

_1/^MeV. The data of Fig. 2 are

-1 /"5 ^ consistent with Ex

=65 A '-'MeV suggesting to identify the observed resonances with this type of E2 excitation.

Fig. 2

form N3S-418

(REV. 7-1 4-64) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 430

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
P. David, J. Debrus, F. Lubke, H. Mommsen, R. Schoenmackers

and G. Stein

PICNS-73, Vol.II, p. 985 (1973) Asilomar

ELEM. SYM. A 2

i Au 197 79

METHOD REF. NO.

7 3 Da 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE range TYPE RANGE G,F ABY THR- 22 C 1- 2 TRK-I 4PI

G,P SPC 2-450 C 450 TEL-D

G,T SPC 11-450 c 450 TEL-D 90

G , HE SPG 14-450 c 450 TEL-D 90

G,A SPC 0-450 c 450 TEL-D 90

Fig. 3: Proton spectrum

it >• «,.(M Fig. 5: ^He - spectrum

Fig. 4: Triton spectrum

Fig. 6: ^He - spectrum

The

total photofission cross sections of 197Au and 238

U were measured for

maX

E f

= to 2.2 GeV (fig. 1). The fission cross sections and the

fissionatilities are 6

Au

= 1.4 - 0.1 mb, fAu

= ( 2.1 - 0 . 3 ) 10 _2

; <S Uf

= 43.2 t 4.4 mb, fU= 1.04 ± 0 . 1 . 431

form N3S-418

•REV. 7-1 4-«4) USCOMM-NBS-DC
ref. P„ Dougan and W. Stiefler

Z„ Physik 265, 1 (1973)

ELEM. SYM.

An

A

197

z

79

METHOD REF. NO.

73 Do 9 egf

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR angle

type range TYPE R AN E G,XP ABY 86-400 C 400 TEL-D DST

-

Atomic weight

Fig. S. Experimental cross-sections at various angles for Ep — 150 MeV divided by

NZjA plotted as a function of atomic weight

Table 10. Gold. Brcmsstrahlung endpoint energy: 400 McV. Differential cross- sections in microbarns/sterrad • MeV • eq. quantum. Quoted errors : statistical in percent

Energy Angle

30 40 50 60 74 90 110 130

79.5 38.8 33.3 28.3 23.3 19.4 13.6 11.3 10.0

2.4 2.2 2.0 2.0 2.1 2.2 2.4 4.0

97.7 33.2 25.8 19.6 17.6 13.8 9.87 7.03 6.48

2.9 2.7 2.7 2.5 2.7 2.8 3.3 5.4

104.6 22.6 17.5 16.0 12.0 9.07 7.07

2.8 2.7 3.1 2.7 2.7 3.5

114.9 28.1 17.1 13.1 11.3 9.65 6.0J 4.54 4.21

3.1 3.3 3.3 3.1 3.2 3.6 4.1 6.7 127.4 14.8 12.1 9.39 7.92 5.52 3.74

3.7 3.6 4.4 3.6 3.8 5.3

148.7 9.85 6.92 7.05 4.93 3.29 2.12

4.6 4.8 5.2 4.6 5.0 7.2 168.2 6.52 5.01 4.63 3.09 2.05

3.8 4.0 3.2 4.6 5.0

185.3 4.63 3.68 3.15 1.95 1.07

4.8 4.9 4.2 6.1 7.3

202.3 2.81 2.46 1.88 1.29 0.596

6.1 6.0 5.3 7.5 9.7

221.1 3.51 2.14 1.89 1.31 7.2 8.2 6.2 9.5 237.5 1.95 1.31 1.20 0.698

10.1 11.0 8.1 13.5

253.9 1.18 0.680 0.728 0.222

12.8 15.1 10.3 23.6 A SHEET 432

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
Atomic weight

Fig. 9. In this figure, the straight lines show the experimental cross-sections at 40* and 74° for £p =150 McV. The other curves arc the same cross-sections divided by

atomic weight

Fig. 6. The ratios of the experimental cross-sections at 40 and 90 degrees for selected proton energies as a function of atomic number

t

433
P. Dougan, T. Kivikas, K. Lugner, V. Ramsay, and W. Stiefler

Phys. Letters 46B, 359 (1973)

ll C.M . i YM. , A

Au 197 79

METHOD REF. NO.

73 Do 11 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

type range TYPE RANGE

G, XP ABY 90-400 c 400 TEL-D DST

Fig. 1. Energy distributions of high-energy photo-protons at

several angles from gold irradiated with 400 MeV bremsstrahlung. The errors shown are purely statistical.

FORM N3S-418

(R EV. 7-1 4-841 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 434

U.S. DEPARTMENTOF COMMERCE

NATIONAL. BUREAU OF STANDAROS
REF.

E. Hayward, W. C. Barber, and Jed Sazama

Phys. Rev. C8, 1065 (1973)

EL EM. SYM.

Au

A

197

z

79

METHOD REF. NO.

73 Ha 3 hag

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

$ G ,G RLY 15 D 15 NAI-D 90

(15.1) (15.1)

POLARIZED PHOTONS

TABLE H. Results.

dJ'/dSp daVdGjr

Target Arbitrary units V V n<DCM)

Cd 0.042 ±0.028 0.39±0.05 0.11 ±0.07 0.09 ±0.07 0.19 Sn 0.084 ±0.036 0.65 ±0.06 0.13 ± 0.06 0.11 ±0.06 ' 0.07 Ta 0.24 ±0.10 1.47 ± 0.14 0.16 ±0.07 0.14 ±0.07 0.20 W 0.52±0.10 1.66 ± 0.12 0.31 ± 0.07 0.29 ±0.07 0.20 Pt 0.23 ±0.08 1.94 ±0.13 0.12 ±0.04 0.10 ±0.04 0.08 Au 0.39± 0.11 2.08 ± 0.15 0.19 ± 0.06 0.17 ±0.06 0.07 B1 0.10±0.15 2.65±0.26 0.04 ±0.06 0.02 ±0.06 0

form N3S-418

IB EV. 7-1 4-941 USC OMM*N BS*0 C PHOTONUCLEAR DATA SHEET 435

U.S. DEPARTMENT OF COMMERCE

NATIONAL 8UREAUOF STANDARDS
K. Lindgren, G. G. Jonsson and B. Forkman

PIGNS-7 3 , Vol.II, p. 991 (1973) Asilotnar

EL EM. SYM.

Au 197 79

METHOD REF. NO. 73 LI 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE type RANGE G.G/ ABX 0-800 G 100-800 ACT -I APT

Fig. 1 Fig. 2

form N3S-418

(R EV. 7-14.64) USC OMM-NBS-O C PHOTONUCLEAR DATA SHEET 436

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. c.- C..VI.

METHOO

Yu. I Izv.

Bull

. Sorokin, V.A. Khrushchev,

Akad. Nauk SSSR Ser. Fiz.

. Acad. Sci. USSR Phys. Ser

and B.A. Yur'ev

37, 1891 (1973)

. 37, 80 (1973) Au

REF. NO.

197 79

73 So 19 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.XN ABX 8- 78 C 8- 28 BF3-I 4PT

6

.

mb

cOC

A

f

i ii ,

.

j' km; ^ 'fiji i i

!i\l

l

tr

jn

7

t r

'“

-i v".

\ i

f. t \

'

' *i 'n t \ 'ifil

' \ I ?i' i . V j

' ti.fi

fy.Zn) L

'

IS

\ ?tV>'. V.t.'i .1 I }.'4I ; Ji

i >•"' •*

l .vjJ V; “ f i * ’ r -t — <•»

:

10 25 E MeV

rt. rnb

S00

4'<73

..Ml fi! 'ii

v

1

! ;';V d ;

\ • 5 f

!' • \ s * :

•'

; £' ? .J*f (Y.ZnJ

!

.

t. '.1 ! v '- fV^ r . V I 'I '£ '* I • *o n w.? •

/o :c 197., Photoneutron cross section cr(Y,Tn) for Au (a)

209 and Bi (b) . The dashed curves gives the nh.otoabsorDtion cross section a . Y

PhoLoneutrcn Cross-Sect ion

r 197. for /iu and

Parameter

20 9 . . 3r

Va ] u o s

,#? AU r*m

<J (V. Tn) (£v < 27 MfV). MeV b too

0 (y. Tn) (£v < 20 M(V| t M:V b 3.37 3.58 a (y. Tii) (Cv -- 20 — 27 MeV|. MtV b 0.00 1.01

<tv [£, < 20 MeV|. MeV b

' 2.31 2.06

<tv [£„ < 27 McVJ, McV-b 3.15 3.47

<77|/T, 20 a- 27 Me V ) , Mev-b 0.06 ,\

Z

0 34 . 0,51

= (£> ) - A

MeVb 2.S4 3.00 a (£2)..MeVb 0.48 0.5 On, mb 7.30 CIO

£„. MeV 13.3 13.2 G, MeV 4.3 4.0 form N3S-418

(R EV. 7-1 4-041 USC OMM-OC 26010-PS4 PHOTONUCLEAR DATA SHEET 437

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. J„0. Adler, G. Andersson, and H. A. Gustafsson

Nuel. Phys. A223 , 145 (1974)

z. _ C.M. 3 rM. A

Au 197 79

METHOD REF. NO.

74 Ad 2 eg*

reaction RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,A ABY 10-500 G 500 TEL-D DST

7 Au(;>, i) 1-9

Fig. 3. Experimental energy distributions at the different angles corrected for energy losses in the

target.

Fig. 4. Total x-particle angular distribution (circles) compared with the angular retribution obtained from cascade-evaporation calculations (solid line). FORM N3S-418

(REV. 7-1 4-«4) (JSC OMM-OC 26010-P64 PHOTONUCIEAR DATA SHEET 438

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
M. Areskoug, B. Schroder, K. Nucl. Phys. A226 , 93 (1974)

METHOD

Lindgren, G. Andersson, B. Forkman

Au 197 79

REF. NO.

74 Ar 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TY PE R AN GE

G,F NOX THR-600 G 600 ACT-I 4PI

Table I Formation modes (C — cumulative, i

----- independent) and decay data l8

) for the fission products

studied

REL FRAG YLDS

Nuclide Type T, C.j (branching ratio) ^CX|> ycalc y calc

(Cl) (keV) (rcl. units) (rcl. units) C 45 1099(56.5 %), 1291(43.2%) 1-75 —0.05 25.91 c 0.575 439(95 %) 2.23 ±0.09 30.12

30 Zn c 1.94 145(100%) 0.69 ±0.02 0.86 31.38

7-4 \s 33 — [ 17.9 596(59.5 %) 2.50±0.05 2.06 32.23 HS* c 120.4' 1 36(5S %) 1.13 ±0.06 1.26 32.65

I 1.48

554(72.6 %), 619(37.4%)

698(23.2%), 1317(26.5%)

4.56±0.07 4.65 35.59

37—— c 83

520(47%), 530(30.4%)

553(16.6 %)

3.74±0.04 4.09 36.01

37 Rb I 33 882(73.4%) 5.40±0.07 5.29 36.44

37 Rb I 18.66 1079(8.3 %) 8.48±0. 19 6.64 37.28 87 V

3 9 c 3.33 388(80 %), 485(92 %) 2.97 ±0.04 3.03 37.70 38 y

3 9

1 108 898(92 %) 5. 12 ±0. 1

1

4.72 38.12

8s Zr 40 — c 85 393(97 %), 898 3 ) 1.10±0.04 1.01 38.12

89 Zr

4-

0

Z,r c 3.27 909(100 %) 2.47±0.03 2.43 38.54

91 Sr 38 3 c 0.403 1024(33 %) 3.9 ±1.0 2.88 39.38 92mNb I 10.16 935(97.5 %) 0.33 ±0.02 39.80 J2?r c 65 724(43%), 757(54.6%), 766 a

) 5.04±0.04 4.69 41.07

I 35 766(99 %) 5.63 ±0.10 7.71 41.07

95 aTc c 0.83 766(100 %) 0.69±0.06

0.93 41.07

9 5mTr 43 — I 61 582(55.1 %) 0.45±0.04 Vo* c 0.71 743(94%) 0.94±0.05 0.96 41.91

2I Ru c 2.9 215(91 %) 0.62 ±0.01 0.61 41.91 ”Mo c 2.8 740(14%), 140 a

) 6.34±0.33 6.32 42.75 99«Tc 43 [ 0.252 140(90 %) 2.20x0.12 42.75 ‘JjRu c 39.6 497(90 %) 6.61 ±0.08 7.11 44.43

‘2i Rh c 1.50 319(19.6%) 5.61 ±0.28 7.06 45.27

-\g 47*^5 c 40 280(32 %) 1.1 2 ±0.04 0.96 45.27 ^"•Ag I 8.4 451(31%), 717(32%), 1046(28%) 0.95±0.03 45.70 lto^Ag I 253 658(94.4%), 885 ») (75.1%) 1.76±0.03 47.38

11 ‘Tn 49 c 2.8 171(89%), 245(94%) 1.59±0.03 1.47 47.80

^^M.A. Wakat, Nucl. Data Tables 8

(1971) 445; C.M. Lederer et al

,

Tables of isotopes (Wiley, N.Y.

1967).

y«p are experimental yields given with statistical errors. The systematic errors are of the order of

5-15 %. Underlined nuclides indicate that the yields in all three samples were measured. Y“ ,e and ±r«10 are yields and peak positions of the charge dispersions calculated from cq. (2). The following nuclides were detected but not used in the analysis (either because of very poor

statistics or because only YF or Ya was measured): 69Ge, 86Zr, 90m Y, ,6 Nb, 94Tc. 1I2 Pd and 112 Ag.

a

) Gamma radiation from daughter nucleus.

b

) Ey

•= 889 keV was obtained in this work. form N3S-418

(R EV. 7-14-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 439

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. G. Bologna, V. Emma, A.S. Figuera, S. Lo Nigro, C. Milone

Phys. Lett. 52B, 192 (1974)

METHOD

EL EM. SYM.

Au 197

REF. NO.

74 Bo 10

79

egf

reaction RESULT

EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,F RLX 200-500 D 200-500 TEK-I 4PI

COH BREMS

K(GeV)

Fig. 1. Coherent bremsstrahlung intensity o: £p = 1 GeV elec- trons in a diamond single crystal versus the photon energy K. The solid curves are the best fits.

Fig. 2. Yields per equivalent quantum of the Au photofission

as a function of the first peak energy nfp

of photons. The

dots are the experimental data.

K(v-V)

Fig. 3. Phototissicn cross section of of Au deduced from the experimental yields.

ronu N3S-418

'REV. 7-14- 64> USC OMM-N B S-O C

U.S. DEPARTMENT OF COMMERCE

national. BUREAUOF stanoaros PHOTONUCLEAR DATA SHEET 443
REF. P. David, J. Debrus, F. Lubke, H. Mommsen, R„ Schoenmackers

,

and G. Stein

Nucl. Phys. A221, 145 (1974)

ELEM. SYM.

AU 197 79

method REF. NO.

74 Da 2 egf

EXCITATION REACTION RESULT ENERGY TYPE

SOURCE RANGE TYPEDETECTOR

RANGE —ANGLE

G*E ABY 9-450 C 450 TEL-D 90

G, T ABY 16-450 c 450 TEL-D 90

G,HE* ABY 24-450 c 450 TEL-D 90

G, A ABY 10-450 c 450 TEL-D 90

*HE=HE3

Fig. 4. Characteristic measured spectra of p, t, 3 He and 4 He from the target nuclei ,7 AI, 40i44Ca, ""Ag, ,,7Au.

Rg. 3. Characteristic measured spectra of p, t, 3He and 4 He from the target nuclei J7A1, 40- 44Ca,

M,Ag, i,7 Au. (over)

form N8S-418

(R EV. 7-1 4-«4> USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 441

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
q,M

442
REF. L.E. Lazareva, A. I. Lepestkin, and V.I. Sidorov

Yad. Fiz. 20, 242 (1974)

Sov. J. Nucl . Phys. 20, 128 (1975)

METHOD

EL EM. SYM. A Z

Au 197 79

REF. NO.

74 La 5

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

TYPE RANGE ANGLE TYPE range

ft, KM SPC 8- -22 C 22 FMTT-n ncT

(28.5)

13 SO SS S3 70 31 ICO 117 ICS 1

FIG. 2. Assyrnetry coefficients c/a obtained for nuclei with various Z in the following studies: ref. 10-E-y niax = 25.5 MeV. E n > 7.4 MeV (*); ref. 1 1 -E7 max = 27-32 MeV. E n >-: MeV (•); ref. 12-

F-y max = 54 MeV , E n > ~8 MeV (_ j ref. 1 3-E-y max = 55 MeV,

En > ~5 MeV' (X): present work-E y max = 28.5 MeV', En > 5 MeV'

(o). The smooth curve show* the coefficient b/a characterizing the photoneutron angular distribution anisotropy as a function of atomic number Z. (This has been converted from the curve given in ref. 1 1 and

and is for the distribution I(i?) = a + b sin?i> + ccos 0, normalized at the

points Z = 82 -83.)

J.W. Jury, J.S. Hewitt, K.G. McNeill,

Can. J. Phys. 46_, 1823 (1968).

12

F. R. Allum, T.W. Quirk, B.M. Spicer,

Nucl. Phys. 52_y 545 (1964).

13

G. C. Reinhardt and W.D. Whitehead,

Nucl. Phys. 30, 201 (1962).

FIG. I. Angu'ar distributions of photoneutrons obtained in irradia- tion of Rh. Ta. An. an.l Bi samples by bremsslrahlung with maximum

energy Ey max

= 25.5 MeV. The curves were calculated from the ex- perimental points by the method of least squares for a distribution of

the form 1(0) = a + b sin :

i? + C cos 0 and normalized (a = I ). For comparison we haw shown below the angular distributions of photoneutrons with energy En > S MeV obtained in irradiation of the same

samples by bremsstrahlung with By max = 20 MeV.

(over)

form N3S-418

(R EV. 7-1 4-«4> USCOMM-OC 2S010-P«4 PHOTONUCLEAR DATA SHEET 443

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
t .

, VtcV

FIG. 3. Photoneutron energy spectra from Rh, Ta, Au, and Hi for ir- radiation of the samples by brenisstralilung with maximum energy

E-y max = -0 (dashed line) and 28. S (solid line) MeV for angle.* 0 with maximum neutron yield. For each nucleus the histograms given for Ky max = 20 and 28 5 MeV have been combined in the interval Fn = 4-4.5 MeV

444
R. Pitthan, F.R. Buskirk, E.B. Dally, J.N. Dyer, and

REF X.K. Maruyama

Phys. Rev. Lett. 33 , 8A9 (1974)

(See Erratum: Phys. Rev. Lett. 34^ 848 (1975)

CLEM. SYM.

Au

REF. NO.

197 79

REACTION RESULT excitation

ENERGY

SOURCE detector

TYPE RANGE TYPe angle RANGE E,E/ FMF 3- 40 D 90 MAG-D DST

Inelastic electron scattering with 90-MeV electrons shows previously observed giant resonances at excitation energies of 63 (£2), 81.4' ,/3 (£1), 105.4' 1

' 3 (£3), and

130.4 *^ 3 MeV (£2). Distorted-wave- Born-approximation analysis of additional structure

at 53A' 1/3 and 195.4' 1/3 MeV suggests a monopole assignment. Transverse contributions

to the £1 matrix element are compatible with an electric spin-flip. Differing widths of the respective resonances in the two nuclei are explained through dynamic deformation

of An. The reduced electric transition strengths 3(EL) are given.

FIG. 2. Same as Fig. 1, after subtraction of the fit- ted background.

FIG. 1. Spectrum of 90-MeV electrons, scattered

inelastically from Pb and Au. The fitted background

which consists of the radiation tail and the machine

background is shown. The counting rate is corrected

for the constant momentum dispersion of the spectrometer. Thus the error increases with the excitation energy.

SCATTERING ANGUS I DEGREES ) FIG. 3. Ratio of the inelastic cross section of the resonance at 9.2 MeV to the Mott cross section as a function of scattering angle. The curves show the results of DWBA calculations assuming an £2 or an £0

assignment. At 105° we did not see a resonance. The

open circle corresponds to a resonance with a height of 1 standard deviation in the count rate and is, there- fore, regarded as an upper limit. The error at 105° represents 1 additional standard deviation.

(over)

FORM N3S-41S

(P EV. 7.1 4-64) USCOMM.OC 2® 0 1 O* P64

U.S. DEPARTMENT OF COwMEPCNATIONAL BUREAU OP ST AMCAfOS PHOTONUCLEAR DATA SHEET 445
TABLE I. Comparison of results for Au and Pb as extracted from the 75° measurements. Columns 2 and 3 show

multipolarity and isospin assignments assumed.

197Au

208

Pb

E

x

[A'' /3

MeV]

EL AT

E*

[«ev]

B(El)

?\ ® ) [fm2L

]

^nat [MeV] EWSR

b)

[••] SPU

c) Others

B(EL)

E x [MeV]

B(EL) o2L

: a) Giat [MeV]

EWSRb [”]

C ) SPUc; Others

B(EL)

53 E0 0 9.2 (3.6*1 .8) 10

3 2. 2*0.

5

35 - 8.9 (5*3) 10 3

1. 8+0.5 50 --

63 EE 0 10.3 (5.2*1 . 2 ) 1 0

3 2. 9*0.

2

77 15.5

ih) (8.4+1 .6)10

J 10.5 (6.7+2.5110 3 2.8+0.

3

95 21.5

, f)k) (2.6+0. 9)10 J

(2.6+0. 3)10

3 3;kl

31 El 1 14.0 100*20 d)

50+10 e)

4. 5+0.2

o

o

O

O

15.0

7.5

82+11 d)h)

74+ 5

’

13.6

103+20

53+10

3.9+0.

1

205

105

16

8

r

64+8

d)f)

71+5 11

105

1

E3

0

1 18.0 (1 .7+.3J10

5 5.2+0.

7

45

30 10.0 17.5 (3.2+1 . 5 ) 10

3 4. 2+0.

7

90

60

17 (i.3*°;®)io5 5>

133 E2 1 23.0 (A. 6+1 . 5 ) 1

0

3 7+1 95 13.5

3

l1 ) (6.5 + 1.4).10

3 22.5 (4.2+1.4J10

3 5+1 ‘ 85 14 (3.4:’),o 3

195 E0 1 33.5 ;io*

3 )io3 10.5+2 250 -- 33.0 (6.5'2 )10

3 6+1 150 —

11 For the monopole |M

if ! 3 (fm4 ). b Energy- weighted sum rule Ref. 19.

c Single particle units Ref. 20.

d Surface oscillation ptr (r) ~ dp n (r)/c/r '‘Volume oscillation p tr (r ) ~pr\r).

8M. Nagao and Y. Torizuka, Phys. Rev.

Lett. 30, 1068 (1973).

9 F.R. Buskirk, H.D. Graf, R. Pitthan,

H. Theissen, 0. Titze, and Th. Walcher,

Phys. Lett. 42B, 194 (1972).

14

M. Danos and W. Greiner, Phys. Rev. 134

B284 (1964).

’ 15

A. Veyssiere, H. Beil, R. Bergere, P. Carlos, and A. Lepretre, Nucl.Phys. A159

561 (1970).

19

N. I. Kassis, Technical Report, Institut

fur Kerphysik der Universitat Mainz,

1969, unpublished.

20

R.A. Ferrell, Phys. Rev. 107, 1631 (1957);

J. Weneser and E.K. Warburton, in

The Role of Isospin in Electromagnetic

Transitions, ed. D.H. Wilkinson,

(North-Holland , Amsterdam, 1969).

fRef. 9. SRef. 8.

b Ref. 15.

‘Ref. 14.

!< Extracted from a 2-MeV-wicle range onl

f-'OTU”

446
REF.

METHOD

I

. j ELEM. SYM. A Yu. I. Sorokin and B. A. Yur'ev

Izv. Akad. Nauk SSSR. Ser. Fiz. 39_ 114 (1975)

Bull. Acad. Sci. (USSR) Phys. Ser. 39_, 98 (1975) &u

REF. NO.

I Z

197 79

75 So 12 hmg

REACTION RESUL T excitation

ENERGY

SOURCE detector

TYPE RANGE ANGLE TY Pe range G,XN ABI 8- 27 C 8- 27 BF3-I 4PI

SEE 73S019

Table 1

Ele- ment A

<*o» (y* Tn) MeV • b a0y

MeV -b 0_J, mb°-2. mb X XMeV-l

^m* MeV

K. MeV

• M— 1» MeV-l

Thres- hold

(7.2n). MeV

°0<El) MeV X

X b

to 27 MeV to 20 MeV

20-27 MeV

it? 2.2.1 1 .90 1.49 0 ;4! 112 6,7 15.8 : 0 1 10.2 19.2 1 .66 >u 2,26 1 .86 1,39 0.47 108 6.5 15.7 1.5 10.2 18.1 1 .08

1 16 2.40 1 .85 1 .40 0.45 110 6.6 15,6 . 1 .7 8,1 17,1 1 .71 117 2.52 1 .86 1,39 0.47 no 6.7 15.4 : 1 .6 7.3 16,5 1,72

Sn; 118 2.45 1 .92 1 ,53 0.39 1 15 7.1 15.5 10.7 5.6 16.3 1 .71 119 2.6:4 I .86 1 ,42 0.44 III 6.8 15.4 22,0 13.2 15.8 1 .74 120 2.62- 2,07 1.69 0,38 127 7.9 15.

J

19.1 .3.6 15.6 1 .75 122 2.94 2.03 1.51 0.52 119 7,1 15.5 21 .8 4,5 15.0 1,77

124 2.90 . .93 1.44 0,49 114 6.9 15.5 23.2 5.4 14,4 1.79 W •' 182 5,68 2.78 2.32 0.46 184 12.5 24.2 5.2 14.9 2.63 " i 184 4.88 2,95 2.33 0.72 196 13,0 — 23.7 5.2 13.6 2.65 Au 197 4.06 3.15 2,81 0.34 226 15.5 13.3 20.9 17.1 14.3 2.84 ph

206 3.93 3.21 2.80 0.41 225 16.1 13.5 23.1 6.5 14,9 2,96

208 4,32 3,28 2.81 0,47 231 16.7 13.3 22,6 9.6 14,1 2.93

Oi 209 4.59 3.47 2,96 0,51 216 17.9 13.2 21 .3 10.2 i 4 ,3 3,00

FORM N 3S*418 (REV. 7-14- 841 USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 447

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOARDS
G. Bologna, V. Bellini, V. Emma, A.S, Figuera, S. C. Mi lone and G.S. Pappalardo

II Nuovo Clmento 35A , 91 (1976)

METHOD

Lo Nigro, EL EM. STM.

Au 197 79

REF. NO.

76 Bo 15 egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

angle TYPE RANGE TYPE RANGE 6,F RLX 220-500 D 220-500 TRK-I 4PI

COHERENT BREMS

12

4«,a

-s'"

Ol

1 1

1

1

1

1

1 I 1 I l

1

. a-i 4~t.i .

- o-) b)

1

1

1 |

1

j

- •

s -

"1 1 1 1 1

1 J.Ll_!

4 - C)

0 i 1 1 1 1 1—

ct)

1 . 1 1 1 . 200 300 400 300 400 500 A.(MeV)

J

Fig. 6. - Photofis3ion yields per equivalent quantum of Bi, Pb, Au and Pt as a function

of the first peak energy k, of photons. The dots are the experimental data; the dashed

curves represent the yield functions estimated as described in sect. 5. a) Bi (y, f), b) Pb (y, f), c) Au (y, f), d) Pt (y, f).

FORM N3S-41#

Ift (V. 7-1 «-#«> USCOMM-NBS-OC

over

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 448
k( MeV)

Fig. 8. - See caption to fig. 7. a) Au (y, f), b) Pt (y, f).

449
REF.

V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. SYM.

METHOD

Au 197 p | REF. NO. 76 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE type range G,F ABY THR-999 C 999 TRK-I 4pr

- m

m Table 1 999 = 1 GEV

Measured values of a, at E= 1000 MeV and deduced values of <rk assumed constant from £0 to 1000 MeV

Element Z*/A

(mb)

Eo (MeV)

<7k (mb)

Bi 32.96 123 ±0.6 200 7.6 ±0.6 Pb 32.45 5.4 ±0.4 220 3.6 ±0.3 n 32.10 4.1-03 230 2.8 ±0.3 Au 31.68 2.0 ±0.1

5

240 1.4 ±0.2

pt 31.18 1.1 rO.08 255 (8 ±0.7) x 10” 1 Re 30.21 (3.7 ±0.3) x 10" 1 280 (2.9 ±0.3) x 10‘ 1 W 29.78 (3.5 r 0.3) x 10" 1 290 (2.8 ±0.3) x IO" 1 Ta 29.45 (33 -03) x 10- 1 300 (2.7 ± 0.3) x 10" 1 Hf 29.04 (1.7 — 0.2) x 10" 1 310 (1.4 ±0.2) x 10* 1 Yb 28.31 (13±0.1)x I0" 1 330 ( 1.2 ±0. 1 ) x 10* 1 Tm 28.18 (7.5 ±0.8) x IO* 2 335 (6.8 ± 0.8) x IO' 2 Ho 2721 (3.6 ±0.4) x 10‘ 2 355 (3.5 ±0.4) x IO’ 2 Dy 26.80 (2.6— 03) x 10' 2 360 (2.5 ± 0.3) x IO” 2 Tb 26.58 (2.5— 03) x 10" 2 370 (2.5 ±0.3) x IO' 2 Gd 26.04 (1.6±0.2) x 10" 2 380 ( 1.7 ±0.2) x IO" 2 Sra 2SJ6 (13 — 0.2) x 10" 2 390 ( 1 .4 ±0.2) x IO" 2 Nd 24.96 (9.2±0.9)x iO -3 405 (1 ±0.1) x I0‘ 2 Ce 24.00 (8 z0.9) x IO -3 420 (9 ±1 ) x 10“ 3 La 23.39 (8.4 ± 0.9) x IO” 3 430 (1 ±0.1) x 10“ 3 Sb 2136 (1.2 ±0.2) x IO' 2 460 (1.5±0.3)x 10" 2 Te 21.19 (8.8 - 1 ) x 10* 3 465 (1.2±0.2)x 10" 2 Sn 21.06 (1.3r0.2)x 10" 2 465 (1.7±0.3)x 10' 2 Cd 20.49 (1.7 ±0.3) x 10' 2 470 (2.2 ± 0.4) x 10' 2 Ag 20.47 (2 — 0.3) x 10' 2 470 (2.6 ±0.4) x 10

- 2 Zn 13.76 (2 -0.4) x 10” 1 515 (3 ±0.6) x 10' 1 Cu 13.44 (2.4 ±0.5) x 10

- ' 515 (3.6 ±0.8) x 10" 1 Ni 13.35 (2.4 ± 0.5) x 10*‘ 510 (3.6 ±0.8) x 10* 1 Fe 12.10 (3 ±0 6) x 10“ 1 510 (4.4±0.9) x 10" 1

Fig. 2. Nuclear fissilities as a function of Z

2

-1. Experimental points: solid circles represent our data;

squares, the data from ref. open circles. -the data from ref. ’); and crosses, the data from (p,D experi- ments20

). The straight line is the best ft: calculated from our data for Z

: A> 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

).

A. V. Mitrofanova et al

,

Sov. J. Nucl. Phys. 6_, 512 (1968)

.

T. Methasiri et al., Nucl

Phys. A167, 97 (1971).

12

J.R. Nix et al., Nucl. Phys.

81, 61 (1966).

20

N. A . Perifilov et al., JETP

(Sov. Phys.)14_, 623 (1962);

Proc. Symp. on' the physics & chemistry of fission, Salzburg

1965, vol. 2 (IAEA) Vienna,

1965, p.283.

P

P

P

P

P

P

form N3S-418

(REV. 7- I 4- 641 USC OMM-N QS-O C PHOTONUCLEAR DATA SHEET 450

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref.

METHOD

G. M. Gurevich, L. E. Lazareva, V. M. Mazur and

G. B. Solodukhov

JETP Lett. 23, 370 (1976)

Pis'ma Zh. Elcsp. Teor. Fiz. 23., 411 (1976)

EL EM. SYM. A

Au

REF. NO.

197

z

79

76 Gu 5 hmg

REACTION RESULT excitation

ENERGY

SOURCE detector

angle TYPE RANGE TYPE MANSE

G,MU-T ABX 8- 21 C 35 NAI-D 4PI

We measured the total cross section for the absorption of rays in the region of £1

resonance for the nuclei l65 Ho, 17»Hf, ll0Hf, “'Ta, "! W, 1,7 Au, and 209Bi. The

singularity in the behavior of the resonance widths, observed in the region

1 60 < A< 185, is apparently -due to the influence of the neutron subshell N = 108.

FIG. 2. Widths T of £1 giant resonance in the region of nuclei with A >150

according to the data of Saclay (•), Livermore (A), and the Institute of Nuclear

Research of the USSR Academy of Sciences (O). The crosses mark the deformation parameters 0.

FIG. 1. Total photoabsorption cross sections for the nuclei

:s5Ho, 178Hf, 188Hf, 181Ta, 182W,

197Au, 203 bi. over

FORM MSS-4W

(REV. T-IA.A4I USC OMM-N IMC PHOTONUCLEAR DATA SHEET 451

U.S. OeRARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOAROS
I

FIG. 3. Width of Lorentz lines approximating the photoabsorption cross sections, for deformed nuclei in the region 150 < A < 185.

Nucleus

Oj , Tnh

r,MeV

ExMeV

<r2 mb

r*MeV MeV

Z2H

er,^

Qo

b P

Ho-165 235 2.0 12.2 272 4.0 15.5 2.3 6. 8 ±0. 8 0.29

Hf-178 291 3.1 12.2 334 4.9 • 15.5 1.8 7. 5±0. 8 0.28

Hf-180 286 3.2 12.2 324 5.1 15.3 1.8 7. 2 ±0.8 0.27

Ta-181 272 3.0 12.1 316 5.1 15.0 2.0 6. 8 ±0.8 0.26

W-182 267 3.2 11.9 303 5.6 14.8 2.0 7. 2 ± 0.

8

0. 26

Au-197 535 5.2 13.7 • • • • • • • • • ... • • • • • •

Bi-209 600 4.6 13.8 • • • • • • • • • ... • • • ...

452
EVENTS

(ARB.

UNITS)

p£F.

F.M. Kiely, B.D. Pate, F. Hanappe, and J. Peter

Z. Physik A279, 331 (1976)

£L £M. jYM. A

Au 197 79

M E T H O O RE". ‘-0.

76 Ki 6 egf

REACTION RESUL T Excitation

EN ERG

V

SOURCE Cc T ECTO = angle

V p £ RANGE TYPE iiv3£

G,F A8Y THR - 530 C 580 TRK-D 4PI

Table 3. Fission cross sections and nuclear fissilities (calculated using several formalisms for obtained from coincident track

pairs

Element Z- A it

( !mh ea. /( = <t, I.69A-’ J

i <7, 0.33 A

quantum 1 U 35.6 - !.5 ' 2.!0" 1 - 1.8 x 10-

Au 317 6.M) 1.13 * 10

1 98 x 10" : Te 21.1 2.5-1 x 10" ’ 5.92 * 10' 5 5.8 x tO"’ A 2 20.5 9.09 y 10

-1 2.37 X 10- 5 2.5 x 10 5

Fig. 3. Fission energy distributions extracted from the present measurements assuming

zero centre-of-mass motion for the fissioning systems indicated

? • =•* n 3 j.sia

O rS-SC

’J.S ;£3;3rv-'( T 0- COm«£BC£

NAT 1 ;',-. 2 V. s c c STANOi-vC:

PHOTONUCLEAR DATA SHEET 453
REF- H. Hirayama and T. Nakamura

Nucl . Inst. Meth. 147 , 563 (1977)

METHOO

EL EM. SYM.

197 Au

REF. NO.

77 Hi 5

79

hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE PANGS TYPE RANGE

G,N ABI 8-30 C 18-30 ACT1

4PI

(8.1)

THICK BREMS TARGET

The integral experiment for a sensitivity check of photonuclear cross section data of C, Mn. Fe, In and Au was performed

by using the bremsstrahlung produced in a thick iron target by 18, 22, 26 and 30 MeV electrons from a linear accelerator. The cross section data measured by the activation method showed better results for all incident electron energies than

those by the photoneutron method, because the latter include the competing (y, np) reaction above its threshold energy.

It is necessary to obtain the cross section data of (y, n), (y, np), (y, 2n), (y. p2n) reactions etc., separately by the activation method. The effective energy range and effective cross section in the giant resonance region were determined for C. Mn, Fe and Au. By using these quantities, the gross structure of the bremsstrahlung spectrum was obtained in good agreement

with the theoretical calculation.

Table 3 Ratio of measured and calculated saturated activities at 9°, R, = Af**!A?*

.

Reaction Reference Detector

Electron energy Threshold energy of

18 MeV 22 MeV 26 MeV 30 MeV competing (y, np)

reaction (MeV)

l2C(y, n)"C 6 ACT* 1.205 1.09 0.824

7 BF34 - 0.757 0.931 •

27.4

3 BF3 - 1.492 1.189 0.914 9 BF3 - 1.418 1.159 -

55 Mn<y, n»54Mn 10 BF3 0.575 0.810 0.598 •

17.8

II 0.595 0.875 0.654 0.609 MFe<>\ n)S3 Fe 12 ACT 0.542 0.783 0.722 1.12 20.9

tI5 In(y, n> 1UnIn 13 BF3 0.448 0.511 - -

15.9 14 BF3 0.603 0.672 0.586 1.00

ll5 In(y. yO ll5m ln 15 ACT 0.829 1.00 0.852 0.995

l97Au<y, nj l96 Au 16 BF3 0.743 0.553 0.529

13.7

17 BF3 0.842 0.628 0.608 0.476

* ACT: measurement of radioactivity of the target.

4 BF3: BF3 neutron counter with moderator.

__ [over]

form NSS-418

(Rev. 7.14-«4I use OMM-OC 26CM0-P44 PHOTONUCLEAR DATA SHEET 454

U.S. DEPARTMENT OF COMMePC;

NATIONAL auREAUO*' 5TANOAROS
Table 4

Effective cross section and effective energy range.

Reaction Effective energy Effective cross section (mb)

range (MeV) Electron energy Average

22 MeV 26 MeV 30 MeV

l2C(y, n) nC 20.5-24.5 5.98 5.28 5.63*0.35 ”Mn(y, n)*Mn 15.0-20.5 - 56.2 52.7 54.5*1.7

^Feiy, n)53Fe 17.0-24.0 - 33.6 47.9 40.8*7.2

197Au(y, n) l%Au 12.5-15.0 553.5 532.5 415.0 500* 85

Fig. 3. Comparison of experimental and calculated bremsstrahlung spectra emitted from an iron target in the 9° direction by

(a) 18 MeV electrons, (b) 22 MeV electrons, (c) 26 MeV elec- trons, (d) 30 MeV electrons.

455
'.tneiic

enerr.y

(MeV)

aa

Fig. 1. The kinetic energies of fragments produced in Cu as a

function of the mass number difference AA between fragments and

target: • denotes the measured mean energies, o the energies calculated with Monte Carlo program [10], V the energies from

fission calculation [11], , and are the energies calculated from the semiempirical formula of [9] multiplied by

factors of l., 1.56 and 102 respectively. The random error is given by bars in some points

Table I. Mean ranges and mean kinetic encigies in three directions

for 24 Na produced in different targets

Kinetic Range mg cm 2 energy MeV

Cu forward Cu backward Cu perpendic.

3.64 ±0.55

2.17 ±0 33

3.09 r 0.46

21.0 + 3 8 10.2± I S

16.7 + 3.0

Ag forward Ag backward Ag perpendic.

’6’. ±1.14

6.65 x 1 00

7 20 ±1.OS

37.1+6.7

31.8 + 5.7 35.0x6.3 Au forward Au backward Au perpendic.*

174-2.6

’.6.0 + 14

12.6x8.4

69.5 + 12.5 64.0 x H 5 49.2 ±33.4

* The statistical uncertainty in the weld was specially large

c uornMiin daTa ewccT 456
Mron

c

109%

ttclton

IpU)

A. Jarund and B. Forkman

Z. Physik A281 , 39 (1977)

400-999

Au 197 79

RE' . *.0.

77 Ja 2 egf

Zz~€C -G- AN Cl. £

ACT-I 4PI

- - —

999=1 GEV

I in- 1 a-j. The measured yield as a function of bremsstrahlung end point energy. The error bars gi\e the statistical errors in the numbers of •/-

^

i detected. The solid lines are fitted to the yield points with the least-squares method. The y ield lroin Cu (Fig. 1 ai is measured in L l] and huS

'ecu recalculated using the monitor curve of [5]

Fit can cross section in the energy ranee 400 to iOOO Mel

he vieids of F. rare l in this work and of Figures 1 to

give* some points

‘ .i • '*1 ^

»

l N =

«•*. jrata***

*#v

, *

[ 1 1 ^

e Ki • 2 a.< I- •*

too 'SO rars*t mil nuir-s»f Af

Mean cross sections of the present work and of [1] (•)

coin pared with the cross sections in proton irradiations: + 400 MeV

from [4], o 700 MeV from [16] and an extrapolated vaiue from [17].

-7 j GcV from [18]

457
REF. I. Blomqvist, B. Bulow, r’rei.r iksson , 3. j'ohnsson, G.G. Jonsson,

K. Lindgren, M. Nilsson, R. Petersson, 0. Glomset, N. Freed,

and W. Rhodes

Z. Physik A288 , 313 (1978)

EL EM. SYM.

Au 197

REF. NO.

78 B1 7

79

reaction RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE range

G,PI- ABY 100-750 C 100-750

ACT1

UNK

The cross sections for the photoproduction of n~ on

197 Au leading to the 1/2“ ground and

13/2 + isomeric states in

1 97 Hg have been measured from threshold to 750 MeV by use of the

activation method. A suitable chemical separation technique was developed and applied in

this experiment. The individual cross sections and the isomeric ratio are compared to calculations based on the impulse approximation.

Fig. I. Experimental und calculated yields. <r,, for the reactions ‘’’Auly. it') 19 ' **Hg and l9T Au(y, t") 19T *Hg versus bremsstrahlung end-point energy. The solid and dashed curves are described

in the text

- 1.0 b'

o.s

I f

- 0.2 H

70TT COT #OT" We

Brt«ns<raMuo9 l««»Yl

Fig. 1 Expenmental and calculated isomenc yield ratios versus bremsstrahlung end-point energy. The open circles are the present

results with the new separation method. The open square is our

result using the "cold finger method. The filled circle is the experimental result of Reference 5. The curves A and 3 are described in the text

Wdicus, H., Smalley, R. = ?roc. Sth Inc. Conf. on High-Energy Physics and duel. Structure, cos Alamos

1 97 5 287 over

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

porm N3S-418

!R EV. 7-1 4-SAI USCO MM-N B S-D C PHOTONUCLEAR DATA SHEET 458
Fig. 3. Theoretically calculated cross sections, <x,, for the models A

and B as a function of photon energy

459
REF. J.J. Murphy. II. 0 M. »J. A..1. and J. Uegahl

Phys. Rev. C 18 t 736 (1978)

! ELEM. SVM. a

Au 197 79

METHOD REF. NO. 78 Mu 9 Hg

REACTION RESULT

EXCITATION ENERGY

SOURCE OETECTOR

angle type ran ge TYPE RANGE

E,A ABX 6-100 D 100 MAG-D 50

a particles from the electrodisintegration of seven nuclei with Z between 29 and 79 have been observed. Energy spectra at 30* in the laboratory for sir nuclei and angular distribtions for five nuclei are reported. The cross sections exhibit a broad peak whose magnitude decreases with increasing Z; the energy of the peak increases as Z increases. Angular distributions at the highest energies measured become increasingly forward peaked suggesting a direct-reaction process.

FIG. 2. The a -particle energy spectra at 50° In the laboratory for the four new nuclei studied as well is for two nuclei In which additional data have been obtained. The solid curves are the evaporation model fits described in text.

^J.J. Murphy, II, H.J. Gehrhardt, and

D.M. Skopik, Nucl . Phys. A277 , 69 (1977)

Z

FIG. 3. Energy of the cross section peak as a function of Z. The solid line is the energy of the classical Coulomb barrier. The closed circles are the current work; the open circles are from Ref. 1.

z

form N3S»418

(REV. 7-1 A- 64) USC OMM-N BS-OC PHOTONUCLEAR DATA _

FIG. 4. Magnitude of cross section peak as a function of Z. The closed circles are the current work; the open circles are from Ref. 1. —• 460

mmERCE

nOARCS
* EF- B. Billow, B. Johnsson, G.G. Jonsson,

R. Petersson

Z. Phys. A290 , 393 (1979)

METHOD

K. Lindgren, M. Nilsson, EL EM. STM. | A

Au

REF. NO.

79 Bu 9 hg

EXCITATION SOURCE DETECTOR

ANGLE ENERGY TYPE range TYPE RANGE

a_ _(G,PI2N ABY THR-750 C 100-750 ACT-I 4PI

7G,PI4N ABY THR-750 C 100-750 ACT-I 4PI

B - G,PI5N ABY THR-750 c 100-750 ACT-I 4PI

l he yields Tor some (y. .vnj-rcactions on

t<,7 Au have been measured from threshold to 7e0 McV by use of the activation method. The experimental mean cross sections are compared to results obtained from other experiments on similar reactions and to cascade-evaperation calculations.

(A) PI IS PI-, ISOMER YLD

(B) PI IS PIFig. I A C. Measured yields as a function of die hiemsstruhlung

end-point energy for the following reactions: A

'’'’AuC/.Jt- 2K| ,,M"Hg. H

|M Au(y.

n

a<.! "rig. C

l,7Au|;Mr' 5«)

,9: Hg

Table i. F.xpcriiticntal and calculated cross sections ur.d calculated isomeric ratios for the (y, 2n) and (y,it 4/i) reactions

Product Spin 0—11 calc nucleus m:g (400 McV) (200 750 MeV)

""-Mg + 132: 2.0 ±0 5 87 + 15 99+16

- I 2 "'•’"Hg + 132; -3 2

2.0 + 0.5 157 ±22 160+16

form M8S-418

<R EV. 7-1 J- 441 USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 461

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS
A. G. Flowers, D. Brnaford, J. C. McGeorge, A. C. Shotter, P. Thorley

C. H. Zimmerman, R. 0. Owens, J. S. Pringle

Phys. Rev. Lett. 43, 323 (1979)

REF.

method

El EM. SYM. Au 197 79

REF. NO. 79 FI 2 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,A SPC UKN D 120 MAG-0 DST

This paper presents energy spectra of a particles emitted following the bombardment

of - TAl, ni,Ni, 32 Mo, S4Mo, and t9TAu with 120-MeV electrons, together with a-partlcle

angular distributions from 59TAu and B,tNi for Ea * 30 and 50 MeV. The data are compared with preequilibrium exciton-model and statistical-model calculations. It is concluded that few-step processes are dominant in the production of a particles with energies above 20 MeV.

PREEQUILIB A EMISS

ALPHA ENERGY (MeV) FIG. 1. a-particle energy spectra at 9 a =30% for Et = 120 MeV. Errors shown are the sum of statistical and systematic contributions. The solid lines are a guide to the eye.

TABLE I. Temperatures corresponding to the pre- equilibrium component of the ( e,a ) reaction, derived

from energy spectra at 9 a = 30° for Et

- 120 MeV.

FIG. 2. a-partlcle energy spectra at 0 a = 30°, for E,

= 120 MeV. The solid circles are experimental points.

The solid lines are the results of preequilibrium exci- ton-model calculations and the dashed lines are the results of statistical calculations neglecting photon absorption above E y = 33 MeV.

Target Temperature* (MeV)

"Al 5.3

°* l Ni 5.5 ”Zn 5.4

,2Mo 5.6 mMo 5.4

i9TAu 6.1

•Error is ±0.2 MeV.

[over]

form M3S--418

<A *V. 7-U.MI USCOMM-N8J-OC PHOTONUCLEAR DATA SHEET 162

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
10 - 10'2 • • • .

u.

10' 5

i 1 1 0 30 60 90 120 150 ISO 8la b(deg) FIG. 3. a-particle angular distributions at £# = 120 MeV for 13TAu (shown as circles for £c

=-30 MeV and squares for Ea

- 50 MeV) and ^NI (shewn as diamonds

for £ a =20 MeV and stars for £ u =50 MeV). The solid lines are the result of simple kinematic calculations described in the text. The sum of statistical and systematic errors is shown where it exceeds the size of the

points.

463
J.S. Pringle

A. G. Flowers, D. Branford, J. C. McGeorge, C. H. Zimmerman

Nucl . Phys. A325 , 63 (1979)

EL EM. SYM. A Z

METHOD

Au 197

REF. NO.

79

79Pr7 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,JN ABX THR-147 D 37,147 ACT14PI

Abstract: Cross sections for the (e, .nt) reaction on

1,7 Au have been measured for I g x S 12 at

37. 72, 124 and 147 MeV bombarding energies using activation methods. Data for t|2 are compared with cross sections estimated from published (•/, n) and (y, 2n) data integrated over the

virtual photon spectrum. Theoretical cross sections for x 5 4 were calculated by means of an

intranuclear cascade model. Good agreement is found for .r S 7. The increasing discrepancy between experimental and theoretical cross sections for x S 7 is discussed. No evidence is found

for giant resonances in regions above the giant dipole resonance.

J=1 TO 12, VIR P ANAL

NUCLEAR REACTIONS l97 Au(e, .m). E = 37, 147 MeV; measured and calculated

cross sections; Ge(Li) detector.

Table l

c

o

Experimental cross sections and decay data used

Isotope

V* energy (keV)

Halflife

Transition

probability P

Refs.

Cross sections (mb) at given bombarding

energies (MeV)

37 72 124 147

,,6 Au 333 6.18 d 2.38E-1 4

) 4.89 6.24 5.08 5.83

i94 Au 356 6.18 d 8.8E-I *) 5.48 7.32 4.45 5.45

194 Au 426 6.18 d 6.5E-2 4

) 4.89 6.30 6.69 5.78

!95 Au 99 183 d I.2E-I 6

) 0.744 1.040 0.930 1.086 '’‘Au 329 39.5 h 5.913E- 1 *) 0.112 0.325 0.303 0.319 '"Au 365 39.5 h I.43E-2 *) 0.312 0.311

1,4 Au 529 39.5 h 2.2 IE — 2 *) 0.312 0.392 '"Au 1469 39.5 h 6.27E-2 *) 0.115 0.304 0.335 0.635

l9J Au 268 17.65 h 3.88E-2 6.7) 0.108 0.139 0.163

191 Au 439 17.65 h I.9IE-2 *.7

} 0.105 0.117

192 Au 308 5.0 h 4.69E-2 A. 6) 0.0385 00546

192 Au 316 5.0 h 7.9E-I * 4

) 0.0329 0.0544 0.0562

l92 Au 613 5.0 h 5.91 E —

2

A. 6) 0.0292 0.0582 0.0741

19, Au 479 3.2 h (4.0E — 2) *) ‘) 0.0192 0.0753

191 Au 586 3.2 h ( 1 0E — 1 ) *) 6

) 0.0199 0.0464 0.0614

190 Au 296 42.8 min 8.6E-1 *'•) 0.00728 0.0172 0.0178

190 Au 302 42.8 min 2.84E- 1 A. 6) 0.0092 0.0117

190 Au 598 42.8 min I.07E-I A. 6) 0.0204 0.0221

l 167 4.6 min (D b

) ’) 0.00832 0.00849

l88 Au 266 8 8 min (1-0) *) 4.7) 0.00215 0.00466

18 *Au 340 8.8 min (2.27E- 1) *) 6. 7) 0.00303 0.00564 "’Au 606 8.8 min (i.i5E-m 6.7) 0.00365 0.00590

186 Au 192 10.7 min (1.0)*) *’) 0.000261 0.001055

l8, Au 311 4.2 mm (i) ”> T

) 0.000455

') Relative transition probabilities.

*) Assumed probability.

[over]

FORM N3J-418

IR IV. 7-1 4-441 USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 464

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
MASS NUMBER A

Fig. 2. Comparison of calculated cross sections

(solid line) w ith the measured cross sections for the production of Au isotopes (circles) versus A at E, « 37 MeV.

MASS NUMBER A

Fig. 3. Comparison of calculated cross sections

(solid line) with the measured cross sections for the production of Au isotopes (circles) versus A at £, = 72 MeV.

MASS NUMSER A

Fig. 4. Comparison of calculated cross sections (solid lihe) with the measured cross sections for the production of Au isotopes (circles) versus A at £, = 124 MeV.

MASS NUMBER A

F,g 5 Comparison of calculated cross sections (solid line) with the measured cross sections for the

production of Au isotopes (circles) versus A at E, = 147 MeV.

465
REF J.-O. Adler, G. Andersson, H.-A. Gustafsson, K. Hansen

Z. Phys. A295 , 65 (1980)

El. EM. SYM.

Au T97 79

METHOD PEP. NO.80 Ad 10 hg.

excitation SOURCE OETECTOR

reaction RESULT ENERGY TYPE RANGE TYPE RANGE ANGLE

G.P ABY 5-500 C 500 TEL-D DST

G.D ABY 11-500 C 500 TEL-D DST

G.T ABY i cn OO c 500 TEL-D DST

G.HE3 _BLI 13-500 c_ 500 TEL-D DST

G,A ABY 0-500 C 500 TEL-D DST

The energy and angular distributions of p, d, t, 3 He and '‘He from the three targets Cu. Ag and Au were measured at five different angles for bremsstrahlung with peak energy

500 MeV. The measurements were made using a telescope consisting- of four surfacebarrier detectors. The experimental ‘data are compared with cascade-evaporation calculations. For the

4 He-distributions the calculations were extended to include the contri- bution from knock-out of surface alphas by the cascade nucleons. The comparison shows

that the main contribution comes from evaporation but that there is a direct component

of the order of 10%.

Fig. 2. Experimental proton angular (filled circles) and energy

(solid histogram) distributions from (he three targets Au. Ag and Cu compared with angular (solid linel and energy (dashed histo- gram) distributions obtained from cascade-evaporation calculations

:o*q

;

t |M«V|

Fit:. 3. Deuteron distribution*. See caption oi Fig. 2

FORM M8S-41I

(R EV. ?.l 4-04) J5COMM.OC 200 1 O* P0 4

(OVER)

u.s. department op ccmmepc.

PHOTONUG.EAR NATIONAL. BUREAU ST DATA SHEET 466
Table 2. Integrated yields, normalisation factors and calculated

direct contributions

Target Reaction V'„'il

' p (mb

eq. ql

Nortnali

zation

factors

- Calculated

direct contribution

in percent

GDR-contnbution

in percent

Au <v- r> 21 0.42 9 _

l;-. ill 6 0.34 - -

<;\M 3 0.48 - -

(y. j| 10 0.66 8 -

Ac (•/. Pi 44 0.S6 11 5 l Ref. 211

<•/. til 6 0.86 - -

(v-o 1.52 - -

(/•• I) 12 1.32 8 -

Cu (;• p) 44 0.54 7 28 (Ref. 22)

(7. d) 4 0.96 - -

(v.o 1 2.10 - -

(/. 2) 8 1.22 9 10 (Ref. 23)

467
r E p . L.Z. Dzhilavyan, L.E. Lazareva, V.N. Ponomarev, A. A. Sorokin

Sov. J. Nucl . Phys. 33, 308 (1981)

Yad. Fiz. 33, 591 (1981)

EL EM. SYM. Au 197 79

method REF. NO.

81 Dz 5 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

G,N RLY 8-90 10-90 ACT1

4PI

E,N RLY 8-90 10-90 ACT1

4PI

Isomeric ratios of the yields of the [y.n I and lej'n | reactions have been measured by an activation method in

the nuclei "Au with formation of high-spin states L/' = 12") of '’‘Au. The dependence obtained for the

isomeric ratio for \y.n) reactions x, on Erma has the form of a saturation curve. In the saturation region the

value is x„ = (6.1 =t0.4|x I0"

4

. Analysis of the dependence xr (£rmu) permits the hypothesis that for the \yji I reaction the formation of this state has a threshold — 12 MeV. .The isomeric ratios x, for the (e.e n ) reaction exceed the values of xr

. This fact enabled us to conclude that there is an appreciable contribution to excitation of the high-spin state from the isovector quadrupole El resonance, which is in good agreement

with estimates based on a simple model. However, the principal role in population of the tsomens state apparently belongs to cascade y transitions.

ISOMERIC YIELDS

PACS numbers: 25.20. + y. 27.70. + q, 25.30.Cg

FIG. 3. Relative values of isomeric ratios *. obtained in bombardment of samples by bremsstrahlung with various maximun

energies £ 7f- )v (curve 1). Curves l and 3 were calculated on the assumption const for £„ = s. 7 md 13 MeV, respectiv eiv. FIG. 5. Experimental values of isomeric ratios of the yields ym 'yt for lif Au nuclei obtained in various reactions with various angular momenta introduced to the nucleus. Points: •—data of Ref. 1, * —our data.

- £ wcl" 1 -a

- ,k4 —- - “

-S

(«CV. 7 -

\

utrRrtH USCQMM*M8!MC PHOTONUCLEAR OATA SHEET 468

«.». u tr»»,.tNTOF COMMERCE

ATIOMAL I UN I Au OF STANOANOS
REF. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

Nucl . Rhys. A351 , 257 (1981)

ELEM. SYM. A

Au 197 79

METHOD REF. NO. 81 Gu 2 hg

REACTION RESUL T excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE PAN GE TYPE RANGE G,MU-T ABX THR-20 C 27 NAI-D 4PI

Abstract : The curves of ihe total uamma-absorpcion cross sections (it, „) in the El aiant resonance enerey

range lor the nuclei '-‘Sm.‘'

,,'Gd. '"’Ho. '" 8 Er. '^Yb. '’ 8 Hf. l80 Hf. ‘“Ta. 1S2 W. ' 84W. "“W

anti '“’Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections <t,iK are given. Quudrupoie moments ((?„) and nuclear deformation

parameters (ID were obtained. For deformed nuclei in the - 155 < ,-i < - 180 region a violation of the correlation between

giant resonance widths ifl and nuclear deformation parameters was found, f, and the widths

of the resonances corresponding to v ibrauons of nucieons along and across the nuclear deformation

axis, were observed to decrease with the increase of which could be accounted for by the presence of all .V = 108 subsheil.

Fig. 2. Total nuclear -absorption cross sections Iit.j measured hy ihe absorption method for ' <4 Sm.

1 ! "Gd. '"'Ho. '""F.r.

' ‘Yb.

' '"III'. ""III. "'Ta. " ; W. '""W and "'Au. Rms error bars are shownPHOTONUCLEAR DATA SHEET 469

USCOMM-NBS-OC

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 2 Parameters of Loremz curves fitting the experimental data on <t,„

(

Nucleus *i r, E. V. r. <r

; r. r

(MeV) (mbi (MeV) (MeV) (mb) (MeV) aj, (MeV )

1 54Sm 12.2 188 3.4 15.' 207 5.7 1.85 8.1

' !l, Gd 12.3 206 ’ -> 15.' 220 5.5 1.81 7.7

'* ! Ho 12.3 202 2.3 15.2 239 4 8 2.47 7,0

lft 'Er 11.9 3.2 15.5 2 7 5 4.5 1.73 7.4

'' 4Yb 12.3 297 2.9 15.5 320 4 9 1.80 7.1

'' 8 Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2

, S o Hf 12.2 286 ^ 3.2 15.3 324 5.1 1.81 7.1

:8l Ta 12.1 *>7** 3.0 15.0 316 5.1 1.97 6.8

,8 -W 11.9 267 3.2 14.8 303 5.6 2.01 6.8

,8 *W 11.9 315 2.9 14.8 321 4.7 1.65 6.8

1 12.0 246 3.3 14 5 5.1 2.07 6.4

i, 7 Au 13.7 535 5.2

Average

1.4 ° 0 11 . 2 °, 4 3 1.5 9.7 46 s

, 0.22

0.2 error MeV

T All! 1 t

Ratios of nuclear ellipsoid axes (4 ). deformation parameters ( /I) and intrinsic quadrupole moments (()„). calculated from E,.

Nucleus l-1Sm 1 ‘"Gd "'Ho "'"Hr ''•Yh ‘''111 '""in ""Ta ‘"-W ,»4 W

1

k 1 320 1.302 1 259 1.327 1 289 1 206 1 281 1.263 1.271 1.268 1 229 u326 0 309 0 266 0.334 0 2'»6 o 303 0 288 0.270 0.278 0.274 0 235 ^ ±tl(i|7 _t o 016 ± 0 036 ±0 032 ±0 024 ±o 032 ± 0 036 ±0 026 ± 0 030 ±0 032 ±0 033 n

h ' 6 2 5.8 7 s 7 0 7 5 7.2 6 9 7.2 7.1 6.2 ^ h>3 t 0 3 ±08 ±0.7 ±0 6 t o s ±0 4 ±07 ±0 8 ±0 8 fll ^

TA III i 4

Integral characteristics ot HI giant resonance

Nucleus "-..p (MeV hi 0 06.Y/5 4 (MeV b) 0 06 V / 4 "Nm 1 94 ±0 06 0.87 2.86 1 24

’ C.ci 2 07 ±0.07 091 2.45 1 30 ""llo I 86 ±0 06 0. 7 8 2.53 1.06 ""Hr 2 24 ±0 06 0 42 3.07 1.26

1 '“Y b 2 69±0 o

5

1.07 3 82 1.52 ''lit 2 85 ±0 O7 1 II 3.99 1.55 "111 2 . 72 ±0 06 1.05 4 03 1.56 "'Ta 2.84 ±0 O' 1 09 3 81 1 46

- W 2.86 ± 0.07 1 09 4.01 1.52 nv 2 '8 ±0 07 1.05 3 80 1 43

'*"\V 2.40-0 07 1 08 3 95 1 48 “ Au 3 12 ±0 06 1 10 4.37 1.54

<T

1 a it. " 4

4 S

1

T

, a 1 L a ,,

.4

( mb) (mb) ( mb) (mb MeV ') (mb MeV ' ) ( /ib • MeV

117 + 3.5 156 0 189’ 9 1 ±0.3 14.3

1 3 23

143 ±4 6 163 0.194 10.5 ±0.4 14.9 3.30

155 ±4 4 160 0 177 10. 1 ±0.3 12.6 2.54

161 ±4 3 197 0 212 1 2.0 ±0.3 16.0 3.13

1 95 ± 3.4 240 0 247 14 5±0 3 19.2 3.54 208 ±4 9 247 0 247 1 5.3 ±0 4 20.2 3.59 200 ±44 250 0 246 15.1 ±0.3 20.7 3.61

2 1 0 ± 5.3 245 0.239 16 0±0.4 20 0 3 45

211 ±5.3 256 0.248 1 6.2 ± 0.4 21.6 3.70 207 ±5 3 251 0 240 1 5.9 ± 0 4 20 9 3.51 2I4± 5 3 256 0 241 1 6.2 ± 0 4 21.6 3.56 229 ±42 276 0 241 1 8.6 ± 0 4 23.3 3.49

470
Hg

.MERCURY

Z=80

"It is a fluid but does

not moisten, and runs

about, though it has no feet" 1

A well known metallic element and the only common metal that Hg

is liquid at room temperature. The ancient Chinese and

Hindus knew of this metal and it has been found in Egyptian

tombs of 1500 B. C. The term merourius was first used by

alchemists in the 6th century. They used the symbol for the

planet Mercury to represent the metal which, because of its

mobil form and color, was called quicksilver. The symbol Hg

is derived from the Latin hydrargyrum, meaning liquid

silver.

I) Waite, A. E., "The Hermetic and Alchemical Writings of

... Paracelsus the Great," James Elliott and Co., London,

1894, Vol.l, pp. 136, 254-5, 314.

Hg

471

REF. I ELEM. SYM. 1 A K . G. McNeill

Phil. Mag. ^6, 321 (1955) Hg 30

METHOO REF. NO. 55 Me 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

G.XN RLY THR - 22 C 22 NAI-I 90

Target

element Counts in 30 minutesper 1000 monitor counts 22 Mev yield mol/r

relative to copper

Yield mol r x 10-9 Cn 288 ±15 10 3-2 <M 047 ±28 41 ±0-3 13 Hg 661 ±26 9-5x00 30

Pb 470x17 8-4 ±0-5 27

FORM

{REV. 7.I4.S4) USC OMM.OC 28010-P84 PHOTONUCLEAR DATA SHEET 473

J.S. DEPARTMENT OF COMMERCE

NATIONAL auREAuOP STANDARDS
a.f. W.H. Hartley, W.E. Stephens, E.J. Winhold

Phys. Rev. 10^, 178 (1956)

Method Li (p,Y) source, I48O kev protons.

Elem. Sym.

Hg 80

Ref. No.

5 6 Ha 1 EGF

Reaction

(Y,*n)

E or A E E ad E J ” Notes

Average Li cross section is 3c5_ mb; cross section with detector response

weighted for low energy neutrons. SVO

Assumed ratio 17.6/14-. 8 = 1.7» **• Calculated cross section at 14-.8 and

17.6 MeV assuming cross section curves measured at Pennsylvania and

Saskatchewan (refer Table I).

** Crosa sections for photoneutron emission induced by the lithium ewnmt ray*. The results are compared with previous data

Betatron data Prewnt cro*v Pennsylvania Saskatchewan

FV-

•eel

rccu on data Counter Counter Group A *Group 8

Data of Mcl/amel 77. eie' 77. .» FIT**

•fe 38 mb 33 mb 37 mb »j0* mb 0.5 2J mb 47 mb

rCo 40 49 47 60* mb 0.5 95* 05 30 60 •N* 23 25 23 40- 0.7 22 32 ^Cu •>4 61 55 d= 1

2

9S» 06 45 iO

jJ,tt 48 45 48 oo»* 0.7 33 54

175 170 135 240' 1.0 175 175 200 !90 ISO „Ti 355 3(50 260 250* 1J 420* 2-3 420*

550*

320*

240*

.,;v 3d5 355 325

255 ^u. 330 295 315* 1.7 450' 1.9 460 -H«

.n»

365 310

340

295

290

250 320" 1.6 440' 2.5 4001 500*

250*

200* uBi 305 2S0 250 220* 2a 550' 2.4 490 195

FORM HBS-411 JICOMWOC

• (ft reference J

» Arena* of 14.5- and 17.4-Met cron •ection* weighted with retail 'e intensities ad Ida litnium nmmi-rav iinte.

• See reference 1*.

• R. NaUians. Ph.D. them. Cnivermy ot Prnntylvmnla. 1934 tunoabiiafted).

• I. Halnem loritiu commumcaton).

1 See reference J.

• See reference J2.

» tenants crow section* at 14 5 inri 1 7 4 Mev as obtained from Groao A data and 14.1/17 6 betatron croee- section ratios, •obtained usint 14 5 17 6 <*roe*-*ection ratio ;rom Pennsylvania oetatron Cata.

• Obtained using 14.8' 1 7.6 cross-section ratio tram Saskatchewan oetatron data. Jh US. OaPARTMCNT OF

PHOTONUCLEAR OATA SHEET 474
Ref. K. Reibel, A.K. Mann c.lem. Sym. A

1 Z ! Phys. Rev. 118, 7*1 (i960) i

ug 80

Method •. q

Y's from r -^(p,(¥Y) reaction; protons from VandeGraaff; Nal

Ref. No.60 Re 1 JHH

Reaction E or A E dE J w Notes

(y,y) EP = 2.<0! i ~ 7 0> = 3-5 ± o.k mb

D (Average level spacing based on J)

0.94 ± 0.62 kev

fyJf

y

m °- 07 4 °-°?

f - 3.0 ± 1.5 «V

f = 0.2 ±0.1 eV

yo

form MBS-418

(8-l-«3> uscomm-oc iasse-P «3

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 475
R.G. Baker, K.G. McNeill

Can. J. Phys. £2, II 58 (1961)

EL EM. SYM. A

Hg 80

METHOD

Betatron; fast neutron yield, angular distribution; Si threshold

detector; ion chamber

REF. NO.61 Ba 2 NVB

REACTION

f EXCITATION SOURCE DETECTOR

RESULT ANGLE ENERGY TYPE RAN OK type NANCE

G.XN ABY THR-22 C 22 THR-I 5-+ DST

In Table It:

a = average cross section o. detector

weighted with neutron spectrum

? = neutrons/100 roentgen,- mole

• 00 W(9) = a

o y

[1 + A

n

Pn

(cos 3 )]

n=l

TABLE IV

I Element

11 da

III IV

d« V

(J<fr)X10** VI

*w«u(22 Mev)X10*

VII

*U,t/+U>Nt Vanadium 245

1

ri±o.oo) 0.01 ±0.08 -0.00±0.10 6.05 0.21 0.12 Chromium 1041[ 1 ±0 . 03

)

0.04 ±0.04 -0.05 ±0.05 4.05 0.17 0.10 Manganese 308 1f 1 ±0.02) 0.07 ±0.03 —0.09±0.04 7- 61 0.25 C.12

Iron 200i(1±0.03) 0.05 ±0.04 —0. 17 ±0.05 4.94 0.18 0.11 Cobalt 390(1±0.02) 0.08 ±0.03 —0.22 ±0.04 9.63 0,26 0.15

Nickel 145(1±0.05) 0.07 ±0.07 —0.23 ±0.09 3.58 0.12 0.12 Copper 347i[1 ±0.02) 0.05±0.03 -0.29 ±0.04 8.57 0.30 0.12

Arsenic 4S2 1 1±0.03) 0.11±0.0-i —0.24±0.05 11.91 0.33- 0.15 Rubidium 638(1 ±0.05) 0. 13±0.06 —0. 14±0.08 15.76 Strontium 409(1±0.05) 0. 10±0.06 —0. 17 ±0.08 10.10 Yttrium 290i(1±0.10) 0.08±0. 12 -0.12±0.15 7.16

Silver 5901 1±0.04) 0. 10 ±0.06 —0.22 ±0.08 14.57 0.87 0.07 Cadmium 9051ll ±0.02) 0.02 ±0.02 —0.26 ±0.03 22.35

Iodine 11331 1 ±0.03) 0 . 04 ±0 . 04 —0.29 ±0.05 27.99 1.42 0 . 0s Barium 10481 1±0.04) 0. 10±0.Q6 —0.38 ±0.08 25.89 Lanthanum 15951[1 ±0.02) 0.02 ±0.03 -0.42 ±0.04 39.40 1.04 0.15 Cerium 13161;i±o.oo) 0.05±0.00 -0.39 ±0.08 32.50 Dysprosium 1652(l±O.0S) 0.04±0. 10 -0.34 ±0.13 40.80 Tantalum 1558 (;i±o.o2) 0.04 ±0.03 —0.22 ±0.04 38.48 2.50 0.00 Tungsten 1365 < 1 ±0.02) -0.07 ±0.03 -0.24 ±0.04 33.71 MercuiV 1345 ( 1 ±0.02) 0.04 ±0.03 —0.31±0.04 33.22 Lead'

r 2274 ( l±0.0l) 0.02 ±0.02 -0.42±0.03 56.17 2.72 0.08

Risnurtb 2162 ( 1±0.02) 0.05 ±0.03 —0.45±0.04 53T.40

r

3.36- 0.06 Thorium 3031 1±0.04) 0.00 ±0.05 —0.32±0.07 74.87 Uranium 4630 ( 1±0.02) 0.05 ±0.03 —0. 17 ±0.04 114.36

•{)+) m 147x10* Mjailinan-MUtroa. Errors arc Uandard mors dua to counting statistics ooiy.

UJ. CE? S’ttNTSf C. -VE 9 CE

NATION At AROS FORM NIV41I

(REV. MAMI

uicomaoc sooto-FAA PHOTONUCLEAK DATASHEET 476
Rof* G- Ben-David (Davis); B. Huebachmann

Phys. Letters 87 C 1962)

Method (n,Y) reaction; Nal(Ti)

Reaction

Hg(7,Y)

E or AC

5 .^ - 8.997

5.

$

a d E

J IT

Elem. Sym. A z

Hg 8o

Ref. No. 1

| 62 Be 2 BG

Notes

t

55 mb

y source

Hg

Detector at 135°.

This is not self resonance; no c section between the nuclear ^evei

responsible for y emission and level

causing resonance.

-OBM NBS-418 u.s. department of commerce

NATIONAL BUREAU OF $?ANC1AR3S

PK 477
— ! REF. H.H. Fleischmann

Ann. Physik 12, 133 (1963)

£LEM. SYM. A

Hg 80

METHOD

Radioactive source; photon scattering; Nal spectrometer

REF. NO. 63 Fi 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

Gj G LFT 2-6 D 2-6 NAI-D

Peak at MeV G-WDTH

r = 0.15±0.03 av

o

2,0 10 M3 5,0 6.0 Me/ Abb. 3. Streuspektren an Hg bzw. Pb mit

Hg-Quelle (Absorber 27,3 g/cm2 PbO)

*°°0 f imu/Kanal-ZOOMih.

3000 i2000

1000

16-2.7Me/.

WMe/ A 3^Me/

/\ I * U

- ] \ " IllA-.L* ^ . * » -- .?•*« *>. \ J0 60

2.0 3,0 \0 3 0 5.0 Me/ Abb. 4. Diffcrenz dor fmpulsspoktrcn. — bci vcnchicdcncn Strcucrn HgO bzw. PbO (gomittelt iibcr HgO- und PbO-Absorbcr

von jo 27,3 g—cm2

), — o — Stroucr Hg, Diffc- rcnz bei vcrschicdencn Absorbcrn (wicder jc 27,3 g/cm1 HgO bzw. PbO), Streuer Pb,

Differenz bci verschiedencn Absorbem (wieder

je 27,3 g/cm2 HgO bzw. PbO)

form MBS-41S

(REV. 7-14.6AI USCOMM-OC 2«010-P«4 PHOTONUCLEAR DATA SHEET 478

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
T. Kaminishi, C. Koj ima

Jap. J. Appl. Phys. 2, 399 (1963)

Hg 80

METHOO

Linac; isomer yield; tictivity

REF. no. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE 3ETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G/ RLY 1 C 6 ACT1

14-PI

( 0 . 16 , 0 . 31 )

Table II. The isomers obseirved

Isomer Observed value Referenced value111 ”)

Half-life Energy (MeV) Half-life Energy iMeV)

Se-77m 17.5 sec 0.160 17.5 sec 0.151 Br-79m 4. SO sec 0.209 4.3 sec 0.20S Sr-37m 2.3 hr 0.3S0 2.8 hr 0.383 Y-89m 15.0 sec 0.920 14 sec 0.915 Rh-I03m 53 rain * 57 min 0.040 Ag-107m 1 l

44 sec 0.094 Ag-109m } 42 sec > 0.95

40 sec 0.088 Cd-lllm 47 min 0.150,0.255 49 min 0.150,0.247 Ia-115m 4.5 hr 0.335 4.5 hr 0.335 Sn-117m 17 day 0.160 14 day 0.159,0.161 Ba-137m 2.6 rain 0.660 2.6 rain 0.662

Er-167ra 2.10 sec 0.209 2.5 sec 0.208 Hf-i79m 18.5 sec 0.157,0.215 19 sec 0.161,0.217 W-183m 5.4 sec 0.200,0.170,0.115 5.5 sec 0.1025,0.2915 others Ir-191m 4.90 sac 0.129, <0.07 4.9 sec 0.042-0.129 Pt-195m 4.5 day 0.065** 4.1 day 0.031-0.130 Au-197m 7.0 sec 0.10,0.27,0.40 7.2 sec 0.130,0.270,0.407 Hg-I99m 43 min 0.160,0.370 42 min 0.133,0.368

* This isomer was measured with a G-M flow counter.

** This value corresponds to Pt-K X-ray energy.

Table III. Induces active::...! .'a'..

Element Beam - r . : . energy. MeV', ,

' x * U' y '

Se 5 1300 me......c .. . w Sr 4 1600 NaBr - jl... Sr 6 0.3 SrCOj pO'A c.c.* Y

_3 90 metallic gra... Rh 5 (0.2* RhCl, grain

Ag 3 ISO metallic plate Cd 6 0.5 CdC': grain

[n 5 8 metallic plate Sn 5 0.0005 metallic place Ba 5 0.6 3a5 powder

Er 4 4900 Er^Oj powder Hf 5 1600 metallic place W 5 120 metallic powder

Ir 5 OO

r-4 M metallic powder

Pt 3 0.3 metallic plate Au 4 4300 metallic plate Hg 6 0.09 metallic liquid

31 * The value measured with a G-M Sow counter. HQTONUCLEAR DATA SHEET 479

U.So DEPARTMENT OF COMMERCE

NATIONAL aijRRAUO? STANOASOS
REF. A. Veres

Acta Phys. Acad. Sci.Hung. _l6, 261-73 (1963)

METHOD

Radioactive source

EL EM. SYM.

Hg

REF. NO. 63 Ve 2

80

NVB

REACTION RESULT EXCITATION ENERGY

SOURCE detector ~l TYPE ANGLE RANGE type range

G,G/ ABX 0-1 D 0-

1

NAI-D

ISOMERS

TafiJitiua II H3MepeHHue 3HaweHHH nocae ooayHeHiiH. cpaBHiiBaeMue c apvniMH airrepaTypHbiMH

ASHHUMH

AKTHBHOCTb

OftnyMCKHR nocne

Aktmbm.

DKCTpn.

B KOHue

JIvTepaTypMbie

aaHHbie ilaHHUe H3MepeHHA

nepaoro M3MepeHHR

(hmh/mhh.)

oojiyM. (hmn/ MHH.) Tux e

(K3B) r.„ E

(KM)

(10~ -CM*) (10-^SB)

Se-77m 3842 ±96 5400 17,5 cen. 160 18,1 ±1 cew. 160±10 9,5 1,75 Sr-87m 191 ±5 200 2,8 m. 390 2,9 ±0,1 m. 365 ±25 0,85 0,2 y-89m 96±20 170 16 ceK. 910 16,7±5 cen. 0,08 0,02

Rh-103m 28 ±5 31 57 MHH. 40 58 ±2 MHH. 20,5 ±0,5 0,08 0,01 Ag-107m 220 ±14 250 44 cen. 93 43,8±0,6 cen 91 ±10 0,8 0,2 Ag-109m 39 cen. 88 Hf-I79m 80±18 155 19 cex. 160; 215 l9±2ceK. 1 0,2

Ir-191m 90±20 250 4,9 cen. 42; 130 5±2ceK. 5,6 1

Pt-l95m 90±9 100 3,5 a. 31;

100; 130;

3,5 ±0,2 a. 32—367,5 ±5

96±5

130±10

0,2 0,04

Au-197m 240± 16 520 7,2 cen. 130; 277; 407

7,2± 1 ceK. 68:130: 280 =20 390-20

0,07 0,01

Hg-l99m 9,6±3,2 42 MHH. 160; 370

0,005 0,001

Adm Phys. Hung. Tim. XVI. Fia*. 2.

form NBS-418

(R EV. 7-1 4-641 U3COMM.OC 2601 0- P64 PHOTOHUCLEAR DATA SHEET 480

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS
Ref. C.S. Young, D.J. Donahue Elem. Sym. A Z Phys. Rev. 1^2, 172*4 (1963)

Hg 80

Method 200 kw pool reactor; monoergic y ' s from (n,y) in Mn, Fe and Cu;

Ref. No. Nal. 63 Yo 1 JHH

Reaction E or AE S'

dE J

rr Notes

(7,7) 6 . 0

- 8.

2

Fig. 5. Relative yield of 7.285-MeV 7 rays versus cost?, where 3

is the angle between the incident beam and the scattered 7 rays. The points are for angles greater than 90s

, the x's are for angles

less than 90s

.

Table II. Totai elastic scattering cross sections (mb).

Source element

Energy

interval (MeV)

Source

energy

( MeV) Tiil.J)

Target

thickness

in cm)

Hg(J) Pb(0.6) Biil.j) Ti 5. 0-7.0 6.41 6.75

0.6 ± 0.4 Mn 6.0-7.

5

7.26

7.15

7.05

<0.J 0.S ±O.J 0.9 ± 0.5 0.8s0.i

Fe 6. 0-7.6 7.64

7.28

0.7 =0.4 2. 4 = 1.

j

125 -20* 2.0il.l Cu 7. 6-8.2 7.91 <0.2 <0.4 <0.2 <0.2

• Calculated using the intensity of 7.64- MeV rays produced by neutron

capture in iron.

Measured a (elastic scattering) values

in Table II; interpolated to 7 MeV *- n Table V. 2

In Figure 5, W(0) = 1 + (0.9±0.l)cos 9

Table IV. Survey of scattering experiments.

Source

element Ta

Target Hg Pb Bi

1 hromium 5 6

0 4 Manganv-e 5 12 10 7*

( r< n 1

7 l I'd'l'vf 4 10 ii 4

Zinc 3 5 6 3

'river to

I. call 3 1 liiamum 15 6

r.ital-cacn target

1'utal

18 33

141 66 24

1 E. G. Fuller and Evans Havward, Phys. Rev. 101. 692 (1956);

Nucl." Phvs. 33, 431 (1962).

* K. Riebal and A. K. Mann, Phys. Rev. 118, *01 (I960).

’ Tsutomu Tohei, Masumi Sugawara, Shigeki Mori, and Motohara Kimara, J. Phvs. Soc. Japan 16. 1657 (1961).

* P. Axel, K. Min, N. Stein, and D. C. Sutton, Phys. Rev.

Letters 10, 299 (1963).

form NBS-418 USCOMM-OC t8S58-P63

U.S. DEPARTMENT OF COMMERCE

N*T1CN*L BUREAU ‘,T *NDARDS

PHOTONUCLEAR DATA SHEET 481
REF.

REF. B. Arad (Huebschmann) , G. Ben-David (Davis), I. Pelah,

Y. Schlesinger

Phys. Rev. 133 < B684*700 (1964)

EL EM. SYM.

Hg 80

METHOD

Reactor, (n,y) reactions source

REF. NO. 64 Ar 1 NVB

reaction RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE type range

G , G ABX 5 D 5 NAI-D 135

(5.44) (5.44)

Table in. Effective cross sections.

7 source Energy

(MeV) Element Protons

Scatterer Neutrons

(ott) (mb) Notes Hg 5.44 Hg 30 116, 118, 119, 120, 121, 122, 124 128

Cl 6.12 pr iu 59 82 103 a V 6.508 Sn 50 62, 64-70, 72 14 Co 6.690 prm 59 82 2.7 a Co 6.867 Nd 60 82, 83, 84, 85, 86, 88 22 Al 6.98 Pb»* 52 126 2900 b

Cl 6.98 Pb 82 124, 125, 126 346 a Ti 6.996 Bi*» S3 126 1560 b Cu 7.01 Sn 50 62, 64-70, 72 1000 b

Ti 7.149 Pb“* 82 126 1000 b Co 7.201 Pb-* S3 126 25 Mn 7.261 pb2M 82 126 25 a Fe 7.285 Pba* 82 126 4100 a V 7.305 Pb30* 82 126 12.5 Hg 7.32 Pb 82 124, 125, 126 5500 c Fe 7.639 Xi 28 30, 32, 34, 36 10.5 a

Fe 7.639 Pr“» 59 82 10 d Cr 8.499 Cu 29 34, 36 24.4 Cr 8.881 Pr‘« 59 82 9.3 XI 8.997 Sm 62 82, 85-88, 90, 92 2.8

• A large error could be introduced in the cross-section values because of large differences in line intensities quoted by Bartholomew and Higgs and by

Groshev et al. (Ref. 6).

b Because of the low counting rate, thick scatteren were used, which will introduce a systematic error in estimating (*yy) tor resonances having a high

nuclear cro9s section.

0 The cross section was evaluated assuming the gamma intensity to be 0.02 photons per 100 captured neutrons (see text).

d Reference 6 gives the 7.639 line of iron capture gamma rays as a single line. However, a recent paper by Fiebiger. ICand. and Segel [Phys. Rev. 125. 2031 (1962)] reports two different lines of equal intensities having energies of 7.647 and 7.633 MeV. The present experiment cannot resolve an energy

difference of 14 keV, therefore, there i9 no possibility of deciding which line is responsible for the scattering.

?orm NBS-418

(REV. 7-14-641 USC OMM-OC 26010-P64 PH0T0NUCLEAR DATA SHEET 482

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUFI EAU OF STANDARDS
Rtw- G. Ben-David, B. Arad, J. Balderman, and Y. Schlesinger

Phys. Rev. 146 . B852 (1966)

EL EM. S YM.

Hg 80

METHOD

Nuclear Resonance Scattering - using N,G reactions.

REF. NO.

66 Be 3 JDM

REACTION RESULT EXCITATION SOURCE DETECTOR

ENERGY TYPE RANGE type RANSC ANGLE

G,G RLX 5

- 10 D 5-10 NAI-D 5 - IQ 135

0 6|- !«- 53”

32-

J'r mm mm

NaMjMSi

H B 13 14

P S axcafi V Cf MbF« 0» Ni CuZnS»Br r ZrMoAqCdSnS&Tt I 8o La C« Pr Nd Sm Gd 0» h# & Yb Hf TaWPtAuKjT!PtiSThU

13 M IT 19 CO 22 a 24 3 3 2759 S 30 34 3 39 40 42 47 48130 31 32 33 3 37 33 59 60 92 64 6« «7 S3 TO 72 73 74 71 79 80 91(92)83 90 92

i£ a

13M 14 14

13 • *

ITm a

38

> Ma

34 34 34 333

3T3

40 40

48

50 30 12 92 62 6394 94

(3 63 M64

67

73

74

76797990 80

91 a

BD(82H82)Ba(B2i«a

93

94

96 97

98 96

9900DO

101 020202

03

116 74

n9 BO

12) 22B2B2

8404 64

as

22 22 42 M3 68 84 94 0404 82SB0

23 43 69 a 03

24 24 44 44 70 TO 70 M3 OSOS OS 142142 a 33 71 87 07 A3 a » 3 72 72 72 MM3 OS OS OS MS

27 2T (yyvyri 73 90 90 90 09 zrcaesca as 31 74 74 74 91 110 a 3 32 76 92 92 92 2112 333 33 a 93 94 U 34 34 94 94 96

32 3 93 97 33 33 »8 3

3 97 20 33

Fig. 3. Histogram of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemical symbol followed by the neutron numbers of the naturally occurring isotopes. Magic numbers are shown in brackets.

Table III. List of effective cross sections.

' om MSV4U

• » V . r-t 4->4l

• iir.iMM.nr JSCI0.P44

Scatterer Energy (MeV) Gamma

•ource

i (mb) Scatterer Energy

1 (MeV) Gamma

source

J (mb)

Sm‘«4 3.907 NI 100 Sn 7.01 Cu no

Pr1** 8.881 Cr 9 Nd 6.367 Co 30 La 3.532 Ni 6 Pr1 ** 6.867 Co 3 Te 8.532 Ni 3» Te 6.7 Cu 8.499 Cr 24 La 6.54 Ag 12 Zr 3.496 Se 3050 Cd 6.474 Co 110 Zn 8.1 19 Ni 13 Mo 6.44 Hg 25« Se 7.817 Ni 50 La 6.413 Ti 72 Sc 7.76 K 90 Mo 6.413 Ti 10 Sb 7.67 V . . . i> Tl 6.413 Ti 25

Cfi 7.64 Fe 40* W ^i.3 Ti . . .b Ni

Pr»«» 7.64 Fe T Sb 6.31 Hg (f 7.64 Fe 12* Ti 6.31 Hg 2* Tl 7.64 Fe 370« Sn 6.27 Ag 75 La 7.634 Cu 7 Pb"* 6.15 Gd Mo 7.634 Cu 11 Te 5.3 Ni . . .1 Bi** 7.634 Cu 4 La 6.12 Cl 35 Tc 7.528 Ni 664 Pr1 ** 6.12 Cl 110 Bi» 7.416 100 Pt 5.99 Hg 40*«

Bi** 7.300 As 80* TI 5.99 Hg 5« Pb*« 7.235 Fe 4100 Pb»« 5.9 Sr . . .A Cl 7.235 Fe 34 Ce 5.646 Co 17 Pr1 ** 7.185 Se 80 3i*» 5.646 Co 55 Tl 7.16 Cu 120 Pb*** 5.53 Ag 70 La 7.15 Ma so Hg 5.44 Hg 75* Bi** 7.149 Ti 2000 Hg 4.903 Co 383

• High-energy component of a complex spectrum.

• A broad scattered spectrum with no observable peak structure.

• There are actually two lines of energies 7.647 and 7.633 MeV having

equal intensities in the iron capture gamma spectrum. The cross section has therefore been corrected, although there is no possibility at present of deciding which line is responsible for each resonance.

4 Is probably an independent level2in the complex spectrum of Ni 7

rays on Te.

• Rough estimate.

' May be inelastic component from 7.J28 level In Te.

• The relative line intensities in this case are due to Groshev and

co -workers. ____________________ ‘ No line is known for the source at thla energy.

1 Difficult to resolve among the many source Ones present el this energy- PHOTONUCLEAR DATA SHL*» 483
REF.

S. Ramchandran and J. A. McIntyre

Phys. Rev. JJ%, 1153 (1969) Hg 80

METHOD REF. NO.

69 Ra 1 hmg

REACTION RESULT

excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G jG NOX 5 D 5 NAI DST

W(0) ~ [1 + a P

2 (cos9)] 5 = 4.906 MEV

[over]

form NBS-418

(REV. 7-1 4-«4> USC OMM-OC 2«010-p«4 PHOTONUCLEAR DATA SHEET 484

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANOAROS
*

k*

V.

Groshev,

V.

N.

Lutsenko.

A.

M.

Demidov,

and

V.

1.

Polekov,

Atlas

of

Gamma

Spectra

from

** R.

Moreh

and

G.

Den-Yaacov,

Nuclear

Research

Center —

Negev

Report,

NRCX-I80.

1067,

Radial

ite

Capture

of

Thermal

S’eulrons

(Pergamon

Press,

Inc..

New

Yotk.

1959).

(unpublished).

fc E.

R.

Shera

and

D.

\V.

Hafemelster,

Phys.

Rev.

150,

894

(1966). •

L.

V.

Groshev.

A.

M.

Demidov.

G.

A.

Kotelnlfcov.

and

V.

N.

Lutsenko.

Nuct.

Phys.

SB.

465

(1964) ;

•H.

H.

Bolotin

(private

communication

from

L.

M.

Bollinger).

G.

T.

Ewan

and

A. J.

Tavendale.

Nud.

Instr.

Methods

26,

I8J

(1964). *

See

Ref.

24a. \

-J 3 S oo

If ff If o

bo

(jt «• ‘j\ H-oS 3

If H- o o — o

If If — o

Ifooo

Ov

Ifo l i 1

is 1 =N N) M

fOi i l O *4

no

Oh

n o C CO oQ.

N»

O i T V *3 l i C* JL 2 V 2 h s*a o

If2

H00 oe

H* If © o a

if©2

Ifo

H-o

If©

09

Ifo

<3 0 0 0 9 0

»*»

O MBO NJ s a s s I s

ifobs

Ifo 3 3

Ifo

Ifo

H-oo §N» ^K» “ VO M U M

M 3 3

ifo S

PI i J s

V»

M

M

2~s

<C5

2*3 * <|SS

D*S r* ^ %>

e.m. n P's » 5

485

Table

II.

Experiment

compared

lo

theory

assuming a

pure

dipole

transition.
V. Emma, S. Lo Nigro and C. Ml lone

Lettere al Nuovo Cimento 2 , 271 (1971)

METHOO

EL EM. SYM.

Hg

REF. NO.

71 Em 2

80

egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR ~

type range TYp E angle RANGE Gal ABY. THR-999 G 300-999 FRAG -I 4 PI

r

31-

lu

2 L

it

°h

2

. Tl

..!• f .-"f 1

, .--ki t

7

}!

v

' t

y 'f »

T ' Au •i?

1

I

200 400 600 800 £ (MeV)

I-,,,

1000 1200

999=1000 MEV

Fig. 1. — Pholoflwtion cross-sections per equivalent quantum ", against tin* maximum energy of pimliui*. Au: a ref. (

4 ), ref. (•), our result*; Itg: • our results; Tl: a ref. (•), a our results. The dashed

curves represent the fits calculated hr the least-squares method taking into account our results only.

£b°

10 A I COO | /A BOO

| > soo

| -'a mo ; ,- A 4)0 !

tt .

y;j

•' A-'

A 300

10

Au Hg Pb

10- 79 8ft 32 82 Z

Fig. - s, -values, deduced in our present and previous (*) experiment*, reported r». the atomic number Z of the elements for onlr soiue energy value*.

(over

)

form N8S~418

(R ev . 7-1 4» 04) U3COMM-OC 260 1 0- P6

4

PHOT0HUCLEAR DATA SHEET 436

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Taiilk l. - b'iunion rronn-urrl inuM /irr (i/mlmi lu-lirrrn IJOII (mil 1 1 II II 1 MrV.

IT; ( III ll)

<>ur results i’lv viiuis results

Hi T.li - 0.-.’ 7.S . o.i. (") 7.H

l’l» :j.:i l o.i :i.4

Tl i.y :L u.i 2.

1

: 0.2 (*)

Mu' 1.5 -O.i

Au 1.19 i 0.00 1.2,5-0.1 («)

£tE

Ur

E (McV)

l irf. :i. |ht |ilmloii „f

lm.-» ri-nr.-iH.-nt tho values a, -= count, calculated

Off “ml An uifiiiiiHt A.Yi„»i iw HiimriKU-a in ret. (•>.

TIiu tiiuilu'tl *lraii^hL

£ io‘ b*

' W Os Pt Hg Pb Bi ; Hf To Re Au n

10 29 30 31 z

2k

32 33

1- iff. t. - -t. -values zs. X'/.l for the elements with atomic iiunilH-r in the nuiffu from 72 to Sd: • our

result*, o re/. (*), o re/. ('). The (lashed curves is drawn by oyo.

\*) V, Kv.m \ c ?*, !«i» Niuiitt ami //«//, S./.y., N«». «!*, lit* \ill?o).

i>) V. J*. ia* N»oii«* •««««! Miuixk: .Y«««•«» r*«ini/o, 3, .‘*17 <ll*7»*>.

(«) V, KtlMAi •*, 1*0 N 1014*1 lMI«i (\ MlUiNK; IxH. Xnufn CiiHtnfn, 2* 117 <11*71 )•

(•) J. Jr.xuK.ioiAX umi il. M* Stkixk.ii: /7«iw. 104* .»Ha (IU.V7).

!•) ii. 4*. (IK C.'AHVALOIt U. COICTIXI, ». JlK.I* lill'ItlCK, <1* i'l/TKXZA iu*<4 U. lllXXlVlIJii: XKitm <'imrntn,

02, mA* V. OiiTMorAXoVA, Yu, X, luaruic iiod 4*. V. ^ohoiux: Horn. Joum* X*ti* Phu 4 012

487
S. J, Mecca and J.R. Rothamel

Nud. Phys. A201, 570 (1973) REF. EL EM. SYM. A Z

METHOD

Hg

REF. NO.

80

7 3 Me 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G «G NOX 5 D 5 SCD-D 135

5 = 4.924

Table 1 Resonant energy results V> V>

(MeV)

V>

(MeV)

V> E‘’ (present work) £'r

c

) (MeV) (MeV)

5.646±0.006 8 3.608 ±0.005 1.3 5.609 ±0.005 5.646

5.643 ±0.005 1.0 5.663 ±0.005 5.4

4.903 ±0.008 3 4.890±0.005 0.9 4.903

4.908 ±0.005 1.1 4.924—0.005 0.65 4.924±0.005 ) Cofn.y) from ref. 3

). *) Co(n,y) from ref. *).

°) Ref. l ). Table 2

Effective cross-section results

Target <ayy> *) (mtl) <ffv/> #

) (mb) <c7r-> <) (mb)

55±20% 338 348 ±20%

“'Hg 385—20% 1777 not measured

') Ref. '). •) Value from ref. ') adjusted using the intensity from ref. '*), consistent with the resonance energy from the present work.

e

) Present work.

G. Ben- David, B. Arad, J. Balderman & Y. Schlesinger,

Phys. Rev. 146 . 852 (1966).

^Nticl. Data Tables A3, (1967). 1966 data.

porm N3S-418

(REV. 7-1 4-04) 'JSC OMM*N B3-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU Or ST ANOARD3

PHOTONUCLEAR DATA SHEET 488
; EL EM. SYM. ! A E. Hayward, W.C. Barber, and J.J. McCarthy

Phys. Rev. CIO, 2652 (1974)

Hg 80

METHOO SEF. NO.

74 Ha 4 hmg

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

TYPE ANGLE RANGE type range

$ G,G ABX 15 D 15 NAI-D 90

(15.1) (15.1)

POL PHOTONS

TABLE I. Results.

Target da ^/dn F dox

/dSl r

(Arbitrary units) Of 7

it (DCM)

Cd 0.042 ± 0.028 0.39±0.05 0.11 ± 0.07 0.09 ±0.07 0.19

hi 1 0.026 ± 0.020 0.54±0.04 0.05 ± 0.04 0.03 ±0.04 0 19 Sn 0.084 ±0.036 0.65±0.06 0.13 ±0.06 0 11±0.06 0.07

Sb 1 0.14 ±0.030 0.77 ± 0.05 0.18± 0.05 0.16 ±0.05 Nd 1 0.14 ±0.07 1.03 ± 0.10 0.14 ± 0.07 0.12 ±0.07 Ta 0.24 ±0.10 1.47±0.14 0.16 ± 0.07 0.14 ± 0.07 0.20 W 0.52 ±0.10 1.66 ± 0.12 0.31 ±0.07 0.29 ±0.07 0.20 Pt 0.23 ±0.08 1.94 ±0.13 0.12 ±0.04 0. 10 ±0.04 0.08 Au 0.39 ±0.11 2.08 ± 0.15 0.19± 0.06 0. 17 ± 0.06 0.07 H* 4 0.33 ±0.09 2.16 ± 0.15 0.15±0.04 0.13 ±0.04 0.03 Pb 4 0.19 ±0.14 2.42 ± 0.19 0.08 ± 0.06 0.06 ±0.06 0 Bi 0.10 ±0.15 2.65±0.26 0.04 ±0.06 0.02 ±0.06 0 Th 1 0.31 ±0.12 2.26 ±0.19 0.14 ±0.05 0. 12 ±0.05 0.07 U* 0.21 ±0.11 2.38 x 0.19 0.09 ± 0.05 0.07 ±0.05 0.08

i Data not previously reported.

TABLE IL Comparison with Saclay data.

Target

U,l2 This experiment

(Arbitrary units)

Uol2 Saclay

(mb) Ratio

Cd 0.337 ±0.053 0.508 0.663 ±0.114

In 1 0.507 ± 0.046 0.591 0.859±0.078

Sn 0.550 ±0.072 0.822 0.669±0.096

3b* 0.590 ±0.061 0.794 0.743 ±0.077 Nd 4 0.837 ±0.100 1.170 0.715 ±0.086 Ta 1.19 ±0.18 1.98 0.633 ±0.096 W 1.05 ±0.17 2.05 0.512 ±0.083

Pt 1.67 ±0.16 2.70 0.619 ± 0.059

aAU 1.62 ±0.20 2.92 0.555 ±0.068 Hg 4 2.16 ±0.20 3.29 0.540 ±0.060 Pb 1 2.20 ±0.27 3.43 0.641 ±0.078

Bi 2.53 ±0.31 3,43 0.737 ±0.090 lb 4 1.89 ±0.22 2.73 0.692 ±0.080 U* 2.13 ±0.22 2.33 0.754 ±0.077 0.656± 0.021

* Data not previously repotted.

FORM N3S-458

(REV. 7-14-941 USCOMM-OC 29010-P94 PHOTONUCLEAR DATA SHEET 489

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A. Veyssiere, H. Beil, R. Bergere, P. Carlos, A.

A. De Miniac

J. Phys • Lett. 36 , L267 (1975)

METHOD

Lepretre

,

ELEM. SYM. A

Hg

REF. NO. 75 Ve 5

80

egf

reaction RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N* ABX 8- 22 D 8- 22 MOD-I 4PI

G, 2N** ABX 13- 22 D 8-22 MOD-I 4PI

Abstract —Partial photoneutron cross-sections [o<y, n) + <Ky, pn)], and a(y, 2n) of W, Re, Ir, Pt and Hg were measured by means of monochromatic photons of 8 MeV ^ E ^ 22 MeV so as to study the giant resonance. The experimentally observed evolution of the shape of the GDR, as one

proceeds from permanently deformed prolate nuclei (W and Re) towards oblate or even triaxia! gamma unstable nuclei (Pt), corresponds to the theoretical predictions of the dynamic collective

* 1032+

**1033

model.

S 8 10 12 1H 16 18 20 22 24

e, <n«v)

Fia 1. — Sections elBcaces parodies a(j, n) + o(y, pn) des aoyaux W, Re. Ir, Pt, Hg.'

C CROSS SECTIONS

6; (MeV)

Fio. 2. — Sections efficaces parodies aty, 2n) des noyaux W,

Re, It, Pt, Hg.

(over)

-ORM N3S-418 ^EV. 7-' 4.441 use OMM-NBS-OC PHOTONUCLEAR DATA SHEET 490

U.3. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
500

>100

300

200

100

0

100

0

100

0

100

0

100

0

Fia

JOTPL CROSS- SECTIONS

3. — Sections efficaces totales <Tj(E) da itoyaiw \V. Re,

Ir, Pt, Hg.

491
R.M. Laszewski and P. Axel

Phys. Rev. C 19., 342 (1979)

ELEM. SYM. A Z

Hg

REF. NO.

79 La 1

80

hg

REACTION RESULT EXCITATION SOURCE DETECTOR

ANGLE ENERGY TYPE RANGE TYPE RANGE G,G ABX 4- 7 D 4-7 NAI-D 135

(4.5-6. 2) 4. 6-6.

8

Avenge elastic photon scattering cross sections wen measured for 1MBi, 1MPb, wPh, *“Ph. Tl and Hg at captation energies between A3 MeV and the neutron emission threshold, with sa energy resolution in the range between 30 and 130 keV. This resolution was sufficient to determine the strengths of most of the strong levels in this energy region for “*Pb; there are concentrations of strength in a few levels near 3.3 and

'

7 MeV with the sum of 5(El)r values equal to about 0.84 and 0.65 e

1 fin

1

, respectively; each of these two groups of levels corresponds to only about 0.63% of the electric dipole sum rule. In the neighboring

isotopes, approximately the same amount of strength is distributed among many more energy levels; although this strength is spread in energy more than it is in 201 Pb, it remains relatively localized.

Ey (MeV)

FIG. 10. section. Hg: Inferred total photon absorption cross

use omm-n as-o c

FIG. 12. Comparison of tits measured cross sections

of, respectively, from the top, :oi Pb, iM Pb. :07 Pb, J0»Bi, Tl, and Hg.

PHOTONUCLEAR DATA SHEET 492

over

COMMERCE

i T AN QA ROS
!

TABLE VL Transition strength comparison at 5.5 and 7 MeV.

5.0—6.0 MeV 6.5-7 .5 MeV

Nucleus Je^dE(MeV mb) %“*Pb strength I^ffdE (MeV mb) %mPb strength

Bi 10.4 68% 10.7 44%

M*Pb 15.2 100% 24.4 100%

JOTpb 12.6 33% • • e •• • t08pb 15.3 104% 20.2 83%

Tl 8.3 55% 7.8 32%

Hg 11.6 76% e e e ...

TABLE IV. Parameters used in Interring 5^ from a-„. (Level spacing is assumed to be of

die form flat

NUdeus Dt (eV) E( (MeV) T (MeV) re (eV> Ref.

Hg 83 8.03 0J6 0.12 15,22,23

Tl 430 6.54 0.50 0.12 15,22.23

G.A. Bartholomew, E.D. tarle, A.J. Ferguson,

J.W, Knowles, and M.A. Lone, in Advance*

in Nuclear Physics3 edited by M. Baranger

and E. Vogt (Plenum, New York, 1973),

Vol . 7, p. 229.

22

J,E. Lynn, The Theory of Neutron Resonance

Reactions (Clarendon, Oxford,. 1968)

^H. Molecky, Sov. J. Nucl . Phys. 1_3, 133

0971).

493
M. Schumacher, F. Smend, W. Muckenheim, P. Rullhusen, H.G. Borner

Z. Phys. A3Q0 , 193 (1981)

REF. EL EM. SYM.

Rg 80

method REF. NO. 81 Sc 6 egf

reaction

EXCITATION SOURCE detector

RESUL T ENERGY TYPE PANGS type range

ANGLE

G.G 1

'-i Zzl SCD-D 9n

Elastic scattering by nuclei in the range of mass numbers between 64 and 238 has been

studied with monochromatic photons in the energy range between 2 and 8 MeV. These

photons were provided either by a Ti(n, y) source installed in the tangential through

channel of the Grenoble high flux reactor, or by 24 Na and 56Co sources produced by

deuteron bombardment of A1 or Fe at the Gottingen cyclotron. The photoexcitation of

23 nuclear levels has been observed and the decay properties and groundstate widths of

the majority of these levels have been determined. For the lead scattering target the co- herent elastic differential cross section has been studied in detail. There is evidence that below the photo-neutron threshold the elastic scattering via virtual photoexcitation of

the nucleus can be approximated by extrapolating the real part of the Giant Dipole Resonance amplitude along a Lorentzian curve. Coulomb corrections to Delbriick scat- tering seem to play a small role at 6.5 MeV.

2.60-6,76 MEV

Table t. Differential cross sections for elastic scattering I da of photons from 5s Co and i4 Na sources by different scattering targets,

in units of pb/sr. Errors in the last digits are given in parentheses. Q

deg

Scattering

targets

2.599* (MeV)

2.754 s (MeV)

3.010* (MeV)

3.202* (MeV)3.254* (MeV)3.272* (MeV)

3.452* (MeV)

90 J3 «u 52.7(25) 57.5<25) c 56(16) 47(4) 456 l!0) c 34(6) 49(14)

:09 Bi 33.1(30) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33(15)

"*‘Pb 31.5(23) 31.0(16) 35 (8) 27(3) 26.6(22) 25(4) 23 1

8

) n*‘Tl 31.5(33) - 27(12) 32(5) 24 (3) 22(7) 34(151 "“Hg 30.0(27) - 24(10) 28(5) 25.5(18) 26(8) 20 18) M,W 22.5(11) - 17 (7) 19(3) 18.4(15) 18(5) 21 |6I 181 Ta 20.0(15) 19.2 (6) 193( 20)“* 20(4) 17.3(21) 1?(<) 21 (8) ls5 Ho 15.9(13) - 17(10) 13(6) 15.6(20) 18(8) - “'Nd 11.4 (7) 14.2 (5)“ 15 (7) 14(3) 24.2(12)“ 13(3) 9 (6) "*'Ce 11.1 (9) 11.0 (5) - 11(3) 9-5(13) 8(4) -

1Z7J 8.4(10) 8.6 (5) - 9(2) 7 (1) 5(3) -

"*‘Sb 8.0(11) - - 10(4) 6.8(19) - 1,270(50)*

nj,Sn 6.5 (7) 7.0 (5) - 5(2) 7.6 (8) 6(3) - ““'Cd 6.2 (5) - - 6(2) 6.6 (8) 7(3) -

120 “«U 55.1(25) 64 |4)‘ 43(151 55(5) 574 (I0)

c 48(5) 48(11)

18, Ta 27.5(15) 25.0 (9) 227(20|‘ 22(5) 21 (2) 22(8) - "*'Nd 17.9(30) 17.0 (9)“ - - 29.8(47)“ - -

* ,sCo source in Fe lattice 6 **Na source in A1 Lattice (part of data have been published elsewhere!

c Transitions to excited states observed m addition to the ground-state transition

“ Photoexcitation of nuclear level identified from ihe size of the differential cross section

(OVER)

FORM N3S-418

IREV. r. 14*641 use OMM-OC 26010* P64 PHOTONUCLEAR DATA SHEET 494

U.S. DEPARTMENT ;CMM£PCi

NATIONAL. 3UREAUOF STAmOAROS
Table 2. Elastic differential cross sections da d £2 (0=90°) in pb/sr measured with the Tim.-/) source and compared with theoretical pre- dictions. n

:

predicted number oflevels in a J£ = 25eV interval at 6.5 MeV Errors in the last digits are given in parentheses

Scattering

target

6.418 VleV 6.555 MeV 6.759 MeV 7.168 MeV n

exp. th. exp. th. exp. th. exp. th.

: “U 23 (12) 10.3 - _ _ _ - 45

:°v Bi - - 219(39)° c 8.0 12 (4) 7.4 1.5(3)- 10 5 ° c 5.7 0.1 “'Pb 7.0(15) 8.6 - - 6.5(11) 7.4 - - 0.05 “T1 2,586 (921

*•' 7.5 - - 13 (3)“ 6.0 - - 0.4 “Hg 12 (3) 7.8 74(17)° 6.5 6.7(15) 6.4 - - 3.4 TMW 159 (10)*-= 6.6 306(33)*-= 6.3 20 (2)*-= 5.6 - - 13

lsl Ta 68 (4)*- c 6.3 - - 10.1(12)° C 5.3 - - 28

l05 Ho 15 (3)

6 4.7 - - 9.5(141° 3.9 - - 18 M,Ce 4.1(21) 4.1 - - 17 (1)°-= 3.6 - - 0.04

" a ‘Sn 4.2(13) 3.0 - - 2.5 (5) 2.7 - - 1.9 M,Mo 1,474 (44)“ ' 15 407(39)*-= 2.5 8.5( 15)° = 2.3 817(258)°-' 2.0 0.5 wZn 2.4 (8) 1.6 - * 1.8 (5) 1.5 * 0.3

* Transitions to elicited states observed * Photoexcitation identified from size of differential cross section

= Photoexcitation reported in [11]

Fig. 9. Differential cross sections for elastic scattering of photons

by (A) :09

Bi. iB)

"J,T1 and (C)"J, Hg through 0 = 90° Solid lines: calculated including R. T, lowest-order D. and N (Lorentzian

shape) scattering

495

'

J, “* u^rvor, G«Z. Cootc. T.R. Sherwood

Sue Lear Phys. LI- 4C9 (l962)

Elem. Sym. A

Hg

;G Me \7 electron synchrotron; activation; Nal

198 80

Ret. No.62 Ca 1 J till

i’l'Actuin ! li or _\ Li

Hg

198

(7,nj

Breitss.

30

i/d E J

rt Notes

Table 1 Isomeric ratios from [y. m reactions

Residual nucleus

Target

nucleus j. Ground start Metastable state

Inter- mediate Isomer ratio VW.rK,) state

Spin Half-life Spin Half-life 5pm

Co5 * i- Co54 2* 71.3 d .3- 9.2 h 0.44 — U.O2 3.2 2 Ge? * 0* Ge: * 32 mm 49 s 0.46—0.07 2.8- i Br41 Bra0 i + 18 min 5- 4.4 h 2- 0 3*2 -0.02 6.3 ... Sr4* 0* 5r

ai 5* 64 d 4- 70 mm 0.36 — O.uT 2.2 ; - Zr*° 0* Zr4 * ?* 79 h 4- 4.4 nun 0 33-0.10 2 N Mo*3 0 Mo*1 4- 15.7 min 4- 66 s 0.46 —0 04

4- Ag‘°* 1* 24 mm 6 3.3 d 0.04—0.02 2.'» 5 In 113 5* In 113 1- 14.5 mm 4

+> 20 7 min 7

~ O.8-0.I 3.

1

Cdm 0- Cd ;u A* 53 h d* 43 d i 11.2 t’e 14* 0* «V=* i- 14«» d 55 s "l 2

' H?‘« 0* Hg‘»* ]- 65 h j* - 24 h

j0.03 — “ ol J *

Ref. Previous work

Br41 »•>) 4“ Br4” IS min 5“ 4.4 h 3- " 33 Se43 l3

> U' Se41 v- 18 mm 57 min 0.5

Zr*° 0- Zr4# 79 h 4 3 mm 0.44 — 0.0O

In 111 l- la114 i- 72 s 5- 5t* d 8 0.65

r. = 2.5 s

The yields )

i ar.d V, arc tor y. ni reaccion 5 ending m the isomeric- or zrounci-stacc. 1

tor 'ho hiehcr- References

J. R. Huizenga and R. Yandeubnsch, Pin ;? Rev 120 'I960 1303 T Encson. Advances .n Physics 9 I90oi 425

D. L. Allan. Nuclear Physics 2+ (19611 274

. T Hibdon. Phys. Rev 114 il959) I TO C T. Hibdon. Phys. Rev. 122 (1991) 123.". T. Ericson. Nuclear Physics 11 1959) 48l

J. H. Carver, and G. A. Jones, Nuclear Physics 19 (1900» Ls>4 A. C. Douglas and N. MacDona.d. Nuclear Phvsics 13 1 1959* 382

T. Encson and V. M. scrunn'ki. Nuclear PhvMes 8 (t958> 284

L. i\acz. L. Pease and H Moody. Can. .1 Phys. 30 M952' 476

L. Katz. R. G. Baker and R Montalbetu. Lan. J. Phvs. 31 ,19531 250

E. Silva ana J Gutdcmbcrg. An Acad. Brasil Cience 23 1956) 275

J. H. Carver and D. C. PeasIce. Plivs. Rev. 120 1IUHO1 2155

J. M. 131a tt and V. F. Weisskopf. Theoretical nuclear physics (John Wiley Now \urk. I*.

5. H. Yegors. L. L. Marsdcn ara R. L. Heath. U. S Atomic Energy Commission Kcj- IDO- 1 0370 ,1958. Nuclear Data Sheets 1 National Rcsearcn Council. Washington. I960' sets 1-5 :nclus;\ . R. Vandenbosch and j. R. Huizenga. Phvs. Rev. 120 190U) 1313 E W’eigold and R. N Glover. Nuclear Physics 32 1902; 1«‘0 K. J. Le Couteur and D \Y. Lang. Nuclear Physics 13 1959) 32 T D Newton. Can. J. Phvs. 34 i 1956' 804

D. \V. Lang. Nuclear Physics 26 .1901) 434 M. E. Rose. Internal conversion coefficients (North Holland Publ. Co.. Amsterdam. I

J. Goldemberg and L. Katz. Phvs. Rev. 90 (1953) 303

ro pm N BS-d 1

8

(3-1-431 USCCMM-OC T', 5*:6-P63

U.S. DEPARTMENT OF COMMENCE

NATIONAL BUREAU OF STANQAROS

PH0T0NUCLEAR DATA SHEET 499
E

Z

method

Friedland, H.R. Lemmer

ELEM. SYM. A 2 Physik ]Jk, 50? ( 1963 ) Hg 198 80

REF. NO. Radioactive source; photon scattering; Nal spectrometer

63 Fr p NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYPE RANGE type range

G,G ABX 1 D 1 NAI-D 1 DST

(412 keV) (412 keV) (412 keV)

W( 120°)

W(160°)

Q.37±0. 05, consistent with 0 2-0 transition.

LFT

PH0T0HUCLEAR DATA SHEET 500

U.S. DEPARTMENT OP COMMERCE

NATIONAL tUNdUOT STANDARD*
ref. K. Masumoto, T. Kato, N. Suzuki

Nucl . Inst. Meth. 1_57_, 567 (1978)

, EL EM. SYM. : A , Z

Hg 198 80

REF NO.

78 Ma 10 hg

w. excitation SOURCE DETECTOR

ENERGY T Y P £ RANGE TYPE RANGE ANGLE

G,N ABY 8-68 C 30-68 ACT - /-' API

Analysis is made of reactions interfering with

'photon activation analysis procedures.

TO HG-197M

The activation yield curves hate been presented for a number of photonuclear reactions in the energy range from 30 to 68 MeV. in order to evaluate quantitatively the interferences due to competing reactions in multielement photon activation

analysis. The general features of the yields as functions of both target mass number and excitation energy were elucidated from the data obtained, discussion being given on the results in terms of the reaction mechanism.

Simultaneous neutron activation due to appreciable neutron production from the converter and surrounding materials has also been studied, and. finally, the magnitudes of interferences in real multielement analysis were given in the form

of their energy dependences.

I i.nl I 1 1 L- L LXJJ

10‘ !0* Nr

Fig. 2. Yield per equivalent quanta versus target neutron, number. Fin. 8. Activation vield curves for the reactions on Pb. T1 and

Hg.

:04 Hg(y, n)203 Hg, a

l98 Hg(y. n) 197m Hg, 7

:04 Pb(y. n) 203 Pb.

:04 Pb(y. 3n) 201 Pb. J

203 Tity.2n)20l T!.

O 198 Hg(y, n) 1,7< Hg. > '"Hgiy, p)'«Au.

204 Pb(y.2n)202m Pb, O

203 THy. n)292 Tl. O

203 TKy, 3n) 200 Tl.

- C N35*4 18

(over)

: e ? - r r s' 5

s* - : - 501
E

max (

M

«V )

Fig. 9. Yields of the (y, n) reactions as a function of bremsstrahlung maximum energy and target mass number. The

numerical values in the figure are yields per equivalent quanta

in mb.

502


V. Knapp

Proc. Phys. Soc. (London) A70, 142 (1957)

METHOO

Hg 199

REF. NO.

57 Kn 1

80

EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G LFT 1 D 1 SCI- D 0-1 90

209 keV

High speed rotor technique

Lifetime of 209 keV state (7.3±1.2) x

10" 11 second

FORM N8S-410

IR ev. 7-' 4-«4l USC OMM*OC 2S010-P94 PHOTONUCLEAR DATA SHEET 505

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
cLtM. jYM.

iC. N. Geller, J. Halpern, and E. G. Muirhead

Phys. Rev. L 18 , 1302-12 (i960)

«£THOO

Betatron; neutron threshold; ion chamber

Hg 199 8o

PEF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYPE RANGE type range

G,N N0X THR C THR BF3-1 4 PI

THRESHOLD

j Table L Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccntcr-of-mass system in Mev.

Knictinn No. runs Present results Other results Method Reference

Hg'*(7,»)Hg“* 6.59 ±0.09 6.680±0.011 mass data r 6.68 ±0.06 mass data q

r

r "V.00"*0",- ylV. B. Bhanot. Phys. Rev. 107. 6 (I9S7) J. L. Benson. A. A. IH-enm. and R. R. Ries, Phys. itaV.lu/no* (19S9) .

, « HBV4J8

? r!C i G.'.w c_ 506

U.S. DEPARTMENT OP COMMERCE

NATIONAL BUREAUOA ItANOA M'S
REF. Y. Oka, T. Kato, K. Nomura, T. Saito. Hui-Tuh Tsai

Bull. Chem. Soc. Japan ^J., 380 (1968)

ELEM. SYM.

Hg

A

199

z

80

METHOD REF. NO.

68 0k 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OET ECTOR TYPE RANGE TYPE range

ANGLE

G ? P ABY THR-20 C 20 ACTI

4PI

I ABi.-t I . Summary op data on (/•, p) reactions with 20 MeV sumsstrahluno

Nuclide

Parent Residual

(Natural (Half-life) abundance. %)

(MeV)

Observed y-ray Yield determined Energy

(MeV)

Branching

ratio (%)

Type of multipole

transition pCi/mg«> Yield/mol -R

:, Mg (10.11) -*Na (15 hr) 12.06 1.37 100 El l.48x 10-> 1.7x10*

**Si (4.71) !,A1 (2.27 min) 12.33 1.78 100 El 1.91 2.8x 10* “Si (3.12) »»Al (6. 56 min) 13.59 1.28 93.8 El+Ml 6.51x10-' 1 .5 x 10* “Ca (2.06) *»K (22.4 hr) 12.17 0.374 85 El+Ml 7.86x10-* l.3x 10* *TTi (7.32) ‘•Sc (84. Id) 10.47 0.887 100 El 7.11xl0-« 3.1x10*

,rTi (73.99) •’Sc (3.4d ) 11.44 0.160 100 £2+A/l 6.83x10-* 1.2x10*

**Ti (5.46) •»Sc (1.8d) 11.35 1.31 100 El 4.40x 10~» 5.8X10*

**Cr (9.55) «v (3.8 min) 11.15 i .43 100 El 5.0IX 10-' 6.6x10* "Fe (2.17) “Mn (2.58 hr) 10.57 1.81 23.5 £2+ A/1 8. lOx I0-* 2.1x10*

’*Ge (36.74) ”Ga (4.8 hr) 10.92 0.295 97 (El) 3.70X10-' 1.3x10* "Se (7.58) ,aAs (26.5 hr) 9.61 0.559 41 El 1.48x10-* 1.3x10*

•’Sr (7.02) “Rb 09d) 9.41 1.08 9 El 5.15xl0-‘ 9.9x10* "*Cd (12.26) "*Ag (3.2 hr) 9.74 1.39 35 El 1.91x10-* 2.1x10*

>*’Sn (7.57) "•"In (54 min) 9.58 1.27 84 El 9.80x10-* 6.9x10*

'•’Ba (11.32) I 3«C* (13d) 8.67 0.830 100 El 1.68x I0-* 2.2x 10* ‘"Hg (16.84) '“Au (2.7 d

)

7.27 0.412 100 El 8.43 x I0_ * 2.2x 10*

a) The value corrected at the end of 1 hr irradiation (9.4 X 10* R/min).

Fig. 2. The yield curve for the (y, p) reaction with 20 MeV bremsstrahlung.

foam NBS-418

(R GV. 7*1 4*«4> U3COMM-OC 2«0’0-P84 PH0T0NUCLEAR DATA SHEET 507

U.s. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARD*
M. Boivin, Y. Cauchois and Y. Heno

Nucl. Phys. A127, 5 20 (1969)

methoo

Hg 199

REF. NO.

69 Bo 3

80

egf

reaction RESULT EXCITATION ENERGY

SOURCE detector

TYPE RANGE ANGLE TYPe RANGE

G,G ABX 0-2 C 0-2 ACT1

4PI

6 LEVELS

Tableau 5 Enersie des nrveaux excites, sections efficaces integrtes et u = gF.rjf pour 1 **H» £ (keV) <r(jib • MeV) «(eV)

1000 ±20 l.l + * 4 x 10“* 2.7+* x 10“ 9 1340±10 3.1 + ‘° x 10~+ 2.3tJ;*xl0- 7

1380±10 2.It’;* xI0“ 3 l.lt‘;f xl<T 6 1420±I0 7.9+ 13 *x to-3

4.3 + 7

;* x 10~ 6

I530tfS 1.2+ 3

;* x 10" 1 7.7+

j

3 x 10“ *

1700±20 2±*'l x 10~ 1 1.6+ 3-3 x 10“*

Indirect Activation of 43m 534 keV level by .5-2.0 MeV bremsstrahlung.

form MBS-418

(R ev. 7-1 4-441 USCOMM.OC 24010-P44 PHOTONUCLEAR DATA SHEET 508

Li.S. DEPARTMENT OF COMMERCE

NATIONAL. 3UREAUOF STANOAROS
ref. K. Masumoto, T. Kato, N. Suzuki

Nucl . Inst. Meth. 1 57, 567 (1978)

EL EM. SYM.

Hg 199 80

REF. NO.

78 Ma 10 hg

REACTION RESULT excitation

energy

SOURCE OETECTOR

TYPE RANGE ANGLE TYPE RANGE G,P ABY 7-68 C 30-68 ACT ~JT 4PI

Analysis is made of reactions interfering with

photon activation analysis procedures.

The activation yield curves have been presented for a number of photonuclear reactions in the energy range Irom 30 to 68 MeV, in order to evaluate quantitatively the interferences due to competing reactions in multielement photon activation

analysis. The general features of the yields as functions of both target mass number and excitation energy were elucidated from the data obtained, discussion being given on the results in terms of the reaction mechanism.

Simultaneous neutron activation due to appreciable neutron production from the converter and surrounding materials has also been studied, and, finally, the magnitudes of interferences in real multielement analysis were given in the form

of their energy dependences.

Nr

Fig. 2. Yield per equivalent quanta versus target neutron number. Fig. 8. Activation vield curves for the reactions on Pb, T1 and

Hg.

204 Hg(y. n)203 Hg. a

l98 Hg(y. n) 197m h'g. 7

:04 Pb(y, n) 203 Pb.

204 Pb(y, 3m201 Pb, 3 203 TKy, 2n)20l Ti,

O l98 Hg(y, n) l97‘Hg,

<» 199 Hg(y, p)

198 Au,

204 Pb(y. 2n)202m Pb, O

203 Tl(y. n)202 TI, O 203 TKy, 3n)200 Tl.

"

o

rm N3S-4 18

(over)

u.s. department of commerce 509
£

max

(McV )

Fig. 10. Yields of the (y, p) reactions as a function of bremsstrahlung maximum energy and target mass number. The

numerical values in the figure arc yields per equivalent quanta

in mb.

510


K. N. GelLer, J. Halpern, and E. G. Muirhead

Phys. Rev. Uj, 1302-12 (i960) Hg 201 80

METHOD

Betatron; neutron threshold; ion chamber

REF. NO.bO Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Taolz I. Summary and comparison of neutron sqMiration energies inferred from present threshold measurements with values predicted from moss data and reaction energies. All energies arc expressed in the center-of-mass system in Mev.

KrntUtNI Nil runs l’rcsciil rtnulls Other results Method Reference WwOHg* 1 6.21 ±0.07 6.234±0.011 mass data r 6.27 ±0.06 mass data q

% W. H. Johnson. Jr., and V. 3. Bhanot. Phys. Rev. 107. 6 (1957).

' j. L. Benson. R. A. Damerow, and R. R. Ries, phys. Rev. 113, 1105 (1959).

HQS-^ia

T. I 4. «*4) «n'0.r«4

U.3. department op commerce

NATIONAL 8U»GAUOf 1TANL'AO05 ?;iOTCNUCL=A.a ; data s;-;3ZT 513
Ref. J.H. Carver, D.C. Peaslee, R.B. Taylor

Phys. Rev. 12^ 2198 (1962)

tlem. Sym. A

Hg 201 80

Method 33 MeV electron synchrotron; activation; Nal

Ref. No. 62 Ca 2 JHH

PHOTONUCLEAR DATA SHEET 514
D. E. Carlson and A. A. Temperley

Phys. Letters _3CB, 322 (1969)

CL C.M. 5 r M.

Hg

A

201

1

30

REF. NO.

69 Ca s egf

REACTION RESULT excitation

energy

SOURCE OETECTOR

TYPE RANGE TYp E RANGE ANGLE

G, MD-T ABX 0 D 0 SCI- D 0 |

Spin parity assignment l/2 3-32.2 KEV . J-PI

form NBS-418

(REV. 7-14.W1 U3COMM-OC 26010-064 PHQTONUCLEAR DATA SHEET 515

U.S. DEPARTMENT OF COMMERCE

NATIONAL 9UREAUOF STANDARDS
Hi
Hg

A=202

.

.

517

Hg

A=202

form NB5-418

(8-1-63) USCOMM-OC 18556-R63 PHOTONUCLEAR DATA SHEET 519

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS
K. N. Geller, J. Halpern, and £. G. Muirhead

Phys. Rev. 118 . 1302-12 (i960)

Hg 202 80

method

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table I. Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the ccntcr-of-mass system in Mev.

Kmcli'Hl No. runs Present results Other results Method Reference

Hg»(7,»)Hg«“ 7.60 ±0.13 7.760±0.011

7.77 ±0.06

mass data mass data

« W. H. Johnson. Jr„ and V. B. Bhanot. Phy*. Rev. 107. 6 (19S7).

r j. L, Benson. R. A. Damerow, and R. R. Riea. Phys. Rsv. 113. 1105 (195*1

> HBS-418

• 4.A4I ?MV> I V'oCw 1 J - ' « A > • < W W 4

U.5. departmentof commerce

NATIONAL BUlUAOOr 3 TANO*mOJ

520
Ref- P. Euthymiou, P.Axel

Phys.Rev. 128, 27I+ ( 1962 )

Elem. Sytn.

Hg

Method25 MeV Betatron - Nal

Ref. No. 62Eul

202 80

6 cReaction

(Y,n)

E or A E

9-35 - 23.20

ad E

33±1C1o ) 23.9

9-35

J * Notes

* 100±6usec isomer from natural

Hg target. Produced mainly by

(Y, n) proeess. Assumed parent

202

is 30fo isotope Hg

(y.n) apparent threshold 11.3±0.

3

M“V

—r~T* \ l | 1 1 1 I » 1 a 30 —»—r—I—» 0 0 0 o

too =

5

3 3

so lit) 9 -

5 -

> iO b~> E 2 r

H- 5 u

x = :

>

[,n

r

r -

X |

i

i

H

- -j

1 it—1—

3

Li 1 1 1 1 1 1 1 L i i i 0.3 2.3 14.3 16.3 9.3 203 22.3 MAXIMUM SREMSSTRAHLUNG ENERGY (MEV)

Fig. 1. Activation curve of 100-jtisec Hi? isomer. The ordinate

gives the relative amount of 100-Msec isomer per unit ionization produced in the ionization chamber monitor. If the isomer is in Hg31

, the ordinate is approximately 4.1 times the energy-inte- grated cross section in MeV-mb.

19 different values of the peak energy of the bremsstrahlung spectrum. At each energy, a complete pulse

height distribution was obtained for the gamma rays which reached the detector between 40 and 180 ^sec

after each yield pulse. In addition, the long-lived back

ground was measured after each run, and an estimate was made of contributions due to slow neutrons. The

activity assigned to the 100-^sec isomer was obtained

by summing the counts above background in the region

of the 533-keV photopeak. The energy dependence of the relative activity produced per unit monitor reading

is shown in Table I and plotted in Fig. 1. The data

1 —

FORM NB5-418

(8-1-63) USCOMM-OC 18SS6-P63 PHOTONUCLEAR DATA SHEET 521

U.S. OEPAR , MENT OF COMMERCE

NATIONAL 3UREAU CF STANDARDS
REF. J. Tenenbaum, R. Moreh, and A. Nof

Nucl. Phys. A218 , 95 (1974)

METHOD

ELEM. SYM. i A z

Hg 202

REF. NO.

74 Te 1

80

egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE type range

G ,G LPT 4 a st1 00 SCD-D DST

4=4. 922

Table 4

Values oCr,r0 and the energy separation <5 (between the incident -/-line and the resonance level) as obtained from the analysis of the various experiments

Scattercr £r r r0 (5 D Kci Ksti (keV) (meV) (meV) (eV) (eV) (10 -5 MeV-3

) (lO-’McV* 1 )

5S Mn 7491 450±250 80± 40 17 ±1

,40Ce *) 5660 13± 3 12± 2 4.7 ±0.3 6800 0.33

,4, Pr •) 6877 85± 35 17± 9 6.7 ±1.5 450 116

,41Nd 4) 6377 340± 40 270 ± 20 12.4±0.3 1200 26

10a Hg 4922 300 ± 50 260± 20 4.2±0.5 19000 3.4 *°*Bi M 5603 950 ±200 950±200 13 ±1 34000 160

The radiative strengths and JfMl are also given. The level spacing D refers to the excitation energy of the resonance level Ey.

*) These values are slightly different from those of ref. *) and were obtained from a renewed

analysis of the experimental results.

Table 2 Measured angular distribution coefficients A 2 , the ratios Nu/NL , the spins and parities of the ground and the resonance levels, Jo” and J,", and the character of the ground state transition

Scatterer Ey (keV) A 2 ^llAYx 7o'T Jr9 Transition

5J Mn 7491 0.01 ±0.02 1.00±0.02 i- i

* 40Ce 5660 0.51 ±0.02 1.14±0.04 0

4 i- El

I4l Pr 6877 0.11 ±0.02 0.95 ±0.03 4- i

4 MI

142 Nd 6877 0.51 ±0.03 1.10±0.04 0

4 i- El

J0J Hg 4922 0.51 ±0.02 1.1 8 ±0.03 0

4 i- El

30, Bi 5603 0.06±0.02 0.97±0.02 1- Ml

®A. Wolf, R. Moreh, A. Nof, 0.

Phys. Rev. C6., 2276 (1972).

Shahal , J. Tenenbaum,

form N35-413

(R EV. 7-1 A-«4I LiSCOMM.DC 26010-P9* PHOTONUCLEAR DATA SHEET 522

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS


ref. K. Masumoto, T. Kato, N. Suzuki

Nucl . Inst. Meth. 157, 567 (1978)

i ELEM. SYM.

| Hg 204 80

REF. NO.

78 Ma 10 hg

REACTION resul t EXCITATION ENERGY

SOURCE OETECTOR

TYPE RANGE ANG.c range

G,N ABY 8-68 C 30-68 ACT -s 4 P

I

Analysis is made of reactions interfering with

photon activation analysis procedures.

The activation yield carves have been presented for a number of photonuclear reactions in the energy range from 30 to 68 MeV, in order to evaluate quantitatively the interferences due to competing reactions in multielement photon activation

analysis. The general features of the yields as functions of both target mass number and excitation energy were elucidated from the data obtained, discussion being given on the results in terms of the reaction mechanism.

Simultaneous neutron activation due to appreciable neutron production from the convener and surrounding materials has also been studied, and, finally, the magnitudes of interferences in real multieiement analysis were given in the form

of their energy dependences.

Nr

Fig. 2. Yield per equivalent quanta versus target neutron num

ber.

Fig. 8. Activation yield curves for the reactions on Pb, T! and

Hg.

204 Hg(y, n)203 Hg.

3

l98 Hgiy. n) i9Tm Hg. 7

;0J Pb(y, n) 203 Pb. &

:04 Pb(y, 3n) 201 Pb. ^ 203 Tiiy, 2n)20i Tl.

O l98 Hg(y, n) i97 *Hg,

<> '"Hgty, p)

198 Au.

:04 Pb<-/.2n)202m Pb, C

203 TI(y.n):a2 Tl. • 203 TKy, 3n)200 Tl.

e o pm N 35-4 18 P ” V . *. ’ 4. c4»

(over)

J.S. AR’MENT OF CCMM£=CE 525
E

max (

M

tV )

Fig. 9. Yields of the (y. n) reactions as a function of bremssirahlung maximum energy and targe't mass number. The

numerical values in the figure are yields per equivalent quanta

in mb.

526
Tl

THALLIUM

Z-81

Thallium is a bluish-white metal that is malleable, very

soft and has a low tensile strength. It was discovered in

1861 by Sir William Crookes, using a spectroscope, while

searching for tellurium in the residues from a sulfuric acid

plant. He observed an unaccountable green line in the

spectroscope and concluded it was from a new element.

Because the bright green color reminded him of the tint of new vegetation in the spring, he called the element thallium

from the Latin word Thallus a budding twig.

Tl

Tl

527
_ /
i' v. B.I. Gavrilov, L.E. Lazareva

Zhur. Eksp. i Teoret. Fiz. ^C, 855 ( 1956 );

Soviet Phys. JETP J*, 87 1 ( 1957)

Elem. Sym.

T1 81

Method y-Bremsstrahlung; synchrotron; BF^ counter

Ref. No. 56 Ga 1 EGF

Reaction E or A E <7d E J ” Notes

0Y,xn)

fct

)

7-27

7-27

14.

6

14.

0

5.4

4.6

4.99 MeV-b

3.77 MeV-b

Table I. Fundamental charac eristics of photo.ieutron cross sections.

1 i | E, Element i sa max

°n max tfaif width

in mev

<j.

; (£) : E\o_ (E) <XEI on max

1 in xev in barns 1 1 .

*

• m .T.ev-oums 1

j

l Copper

i :3:i 0.125

j 0.482

4.3

5.3 0.03 |

! u.66 I 7.4

8.1

C/3

. C

Caor;.::

: u.o i 0 . 270

1 k) . 288 iiio 2.33 1 2.35 3.4 3.2 u

C3

! 11 .

5

0.4 '2 0.3 3,o7 3.5 Coio 1 1

'« . 2 0.371 | 5 0 . 4 37 7.6 ThaLiium • 14.0 0 . 053 ‘ 5 .

4

4. S3 7.6 3;smu:n 13 . j 0.3.77 5.0 3.06 7.4

ThoriL-a 1 14.5 0.755 | 5 . r» 5.33 3.0

Ur am u.n 11.

0

1.18 8.8 : w.3 , 10.5 4J

Tai3L£ H. Threshold of pnotoncuiron reactions ( mev).

Element

! (r. n)

i

<T, ^>1

1 ir, Jnil it. -.n»

1

Cadmium ! 6.7 14.6

l 23.0 i >30

Iodine

1 9.-4 16.2 20.0 : 22.3 Tantalum 1 7.6 13.0 21.6 ! 23.3 Cold ! s.i 14.:) 22. J 5:20 Thallium

1/ismuth 1 7.5

! 7 4

1:l.a 22 1 23 3 ~S.3 j 3:) 0

av

COa

c/1 ou

CJ

T.-BLZ GI. Cuaracteristics 01 c..e cross section of oasorution of y-quanta by nuclei.

C-w.rau.a Iodine

Tai.t-iura

Thai 11 tun Sisir.uta

£res

in mev

( £ = £ ) ^ - \«r

p res ' l e

in barns _

~

0

•jx cm

15.

C

15.5 3.0

5 2

iiio 13.o

0.203 0,158

0 . •, '.8

1.00

l,<0

1.03

1.23 1,28 1.04

0,111

0 . 1 IT : O.OuTCS 0,100 ! 0.0130

0.214 i 0.01S2

0,255 j 0 0200

0,220

1 OiOlTri

Energy

Figure 2 : Photoneuferon cross section

o'n, computed from the yield curves by

the "photon difference method."

Curve is presented for the cross section of y-quanta, computed from

the statistical theory of neuclei.

1.16 1,13

1,23

l .23

1 , ili

o am NBS*418 ... ItCOMM-OC

J.s. department of COMMERCE!

NATIONAL R6AU OF STANCARO!

PHOTONUCLEAR DATA SHEET 529
Ref. K.Reibelj A.K. Mann

Phys. Rev. 118 . 701 (i960 )

Method Y‘s from F

1^(p,ary') reaction; protons from VandeGraaff; Nal.

Elem. Sym.

81

Ref. No. 60 Re 1 JHH

Reaction

Oy,y)

E or A E

E -2.05

P

E -2.40

P

ey

“ 6.9

V Ta

S

crd E J

rr Notes

( f) = 3*9 - 0.6 mb

< r)= 2.1 ± 0.3 mb

<<T> = 1.6 ± 0.4- mb

(<r)= ± 1*0 mb

pcrm NBS-4)8

USCOMM-OC 105S8-P93 PH0T0NUCLEAR DATA SHEET 530

U.S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS
REF. J. Moffatt and D. Reitmann

Nuclear Phys. 6j>, 130 (1965)

method

£l_ £M. 3

'

T1 31

[Page lof 2]

REF. NO. 65 Mo 2 EGF

REACTION RESULT

EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE type range

G.XN ABX 10 - 110 c 16 - 110 ACTI

4PI

r 202,201,200 , „ . . Measured yields of T1 ’ ’ by activation technique.

203 20S

Targets natural thallium (T1 29.5$, T1 70.5$) NBS chamber.

form MBS-418

(R EV. 7-14.84) U3COMM-OC 28010-P84 PHOTONUCLEAR DATA SHEET S3!

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF* STANDARDS
Fig. 5. Cross-section for production of n< “*.

Fig. 6. Total cross-section for all neutron-producing reactions in Tl*“.

form N3S-418

IRCV. 7.1 4-«4l U3COMM-OC 28010-P94 PHOTONUCLEAR DATA SHEET 532

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
I REF. G. Ben-David, B. Arad. J. Balderraan, and Y. SchLesinger

Phya. Rev. 146 . B852 ( 1966)

ELEM. SYM.

T1 31

METHOD

Nuclear Resonance Scattering using N,G reactions.

REF. NO.

66 Be 3 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

type Range TV PE RANSE

G,G RLX 5

- 10 D 5-10 NAI-D 5

- 10 135

Fio. 3. Histogram of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemical symbol followed by the neutron numbers of the naturally occurring isotopes. Magic numbers are shown in brackets.

Fig. 1 • (d) Simple scattered spectrum from T1 excited

bv Fe capture gamma__ravs_^wi^th^Bi^back^round)^^^^^

(fi C v . 41

\|1 c OMM-OC 2I0IIJ.PM PMOTOHUCLEAR DATA SHk

Table III. List of effective cross sections.

Scatterer Energy (MeV) Gamma

source

s (mb) Scatterer Energy (MeV) Gamma

source

J (mb)

Sm‘«* 8.997 Ni 100 Sn 7.01 Cu 110 Pr« 8.881 Cr 9 Nd 6.367 Co 30 La 8.532 Ni 6 Pr‘*» 6.867 Co 3 Te 8.532 Ni 3» Te 6.7 Ni Cu 8.499 Cr 24 La 6.54 Ag 12 Zr 8.496 Se 3050 Cd 6.474 Co no

Zn 8.119 Ni 13 Mo 6.44 Hg 25s Se 7.317 Ni 50 La 6.413 Ti 72 Se 7.76 K 90 Mo 6.413 Ti 10 Sb 7.67 V ...b Tl 6.413 Ti 25 Cd 7.64 Fe 40* w *^6.J Ti . . . t» Ni 7.64 Fe 7* Sb 6.31 Hg 6*

Pr'** 7.64 Fe 12* Ti 6.31 Hg 2• T1 7.64 Fe 370* Sn 6.27 Ag 75

I.

a

7.634 Cu 7 Pb1** 6.15 Gd . . .« Mo 7.634 Cu It Te 5.8 Ni . . .1 n.»" 7.634 Cu 4 La 6.12 Cl 35 Te 7.528 Ni 66< Pr!U 6.12 Cl 110

Bi*» 7.416 Se 100 Pt 5.99 Hg 4C*-* Bi»» 7.300 As 30* TI 5.99 Hg s« Pb«* 7.285 Fe 4100 ?b** 5.9 Sr . . .A Cl 7.285 Fe 34 Ce 5.646 Co 17 Pr'u 7.185 Sc 80 Si** 5.646 Co 55

T1 7.16 Cu 120 Pb*" 5.53 Ag 70 La 7.15 Mn 50 Hg 5.44 Hg 75s Bi*» 7.149 Ti 2000 Hg 4.903 Co 385

• High-energy component of a complex spectrum.

k A broad scattered spectrum with no observable peak structure. •There'are actually two lines of energies 7.647 and 7.633 MeV having

equal intensities in the iron capture gamma spectrum. The croes section has therefore been corrected, although there is no possibility at present o< deciding which line is responsible for each resonance.

4 Is probably an independent level^in the complex spectrum of Nl 7

rays on Te.

• Rough estimate.

< May be inelastic component from 7.328 level in Te.

• The relative line intensities In this .-»«» an due to Groshev and

eo -workers.

‘ No line is known for the source at this energy.

i Difficult to resolve among the many source Uses present at this energy. tl 533
REF' A. V. Mitrofanova, Yu. N. Ranyuk, and P, V

J. Nucl . Phys. (USSR) 6, 703 (1967)

Sov. J. Nucl. Phys. 6, 512 (1968)

METHOD

Sorokin EL EM. SYM.

T1

REF. NO.

81

o7 Mi 1 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

G,F ABX 300-999 300-999 TRK-I

Detector: Fission fragment tracks in glass. 999 = 1600 MEV

Angular distribution measured for Pb was found isotropic;

for other elements it was assumed isotropic.

iuclcus Kissionability D

Cross

section <r_ ia/3 Nucleus

Kissionability U

Cross

section tr*.

Bi 0. ! 1 —0.01 7.8±0.6 Os 0.0058 ±0.0005 0.37±0.04

Pb il. 051 1—0.004 3.4±0.3 Re 0.0056 ±0.0000 0,35±0,04

T1 0.031 -0.003 2.1±0.2 Ta 0.0045 ±0,0005 0.27±0.03

\u

i’t 0.019±0.002

0.Ol2±0.Q02

1 ,25±0.10

0.80±0.08

Hf 0.0042±0.0004 0.25±0,03

Fig. 2. Photofisaion fragment yields as a function of Z’/d. The

ordinates are values of <rQ in units of cm1

.

form HBS-418

(RGV. 7-1 4* 94) USCOMM-OC 2A010-P64 PHOTONUCLEAR DATA SHEET 534

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3UREAUOF STANOARDS
REF. N. N. Kaushal , E. J. Winholdj P. F. Yergin, H. A. Medicus and

R. H. Augustson

Phys. Rev. J/75, 1330 (1968)

METHOD ’ “

ELEM. SYM.

II

REF. NO.

81

REACTION RESULT EXCITATION ENERGY

SOURCE OET ECTOR

ANGLE TYPE RANGE TYPE RANGE G,N ABX 50-85 C 55 , 85 .. TOF-D 10 -RF 67

( 67 . 5 )

NEUT ENGY SPEC

(M,ru„

$7

i '•••••

I •* * I*' ».

fit.

( )(H ••

.

{ fl(,

• H T» 1 f 1

u

• .. 1 i».

t

m

*f it

• • . f e

-a nr ‘i a

1 *• h

*—r.*. -

I H|»

,

neutron CNcmrr, mv

Fkj. 6. Observed neutron spectra due to 55-85-MeV difference photon spectra. The effective cross sections have been divided by

* soo -

z!< «oo

bl,3

Yljlj £ 200

-i 1 1 1 r—

t

rST E--70M.V (LEVINOER)

\ £., » 10 M.V .. .V •

<p <9 o

t<r.4 WITH OPTICAL ATTENUATION

o %

E„ > SO M«v

_i I I—

Fio. 7. Effective cross sections for production of fast neutrons with energies greater than 10 MeV (solid circles) and 30 MeV

(open circles) by the 55-85-MeV photon difference spectrum. The

dashed curves are modified quasideuteron mode! predictions as discussed in the text.

Tabus L Comparison of present cross-section values in mb

for production ofmgh-energy photoneutrons by 55-85-MeV photons with measured cross sections <7 (7, Tti), also in mb, for total photoneutron production. The present cross-section values are uncertain by 8 to 10% because of counting statistics and normalization errors ; in addition all values depend on an absolute normalization in terms of the deuteron photodisintegration cross section, which is known to about 10% at these energies.

Target

4r(dff/du)«* (£.>10 MeV)

[Present experiment]

<r(y,Tn) Jones and

Terwilliger* Costa d <d> Other

resuits

Li 0.7S 1.0 Be 1.0 2.7 2J 22- 3 1.0 1.4 C 1.5 U 1.4 2.4<* 0 1J 1.6 A1 2.8 5.5 46 8* S 2.1 4.4 6.5^ Fe 4.2 16 12 Cu 43 20 19 2a 44 15 In 7.4 Sn 7.0 Ta 10.7 95

T1 10.7 Pb 3.3 100

Bi 13 U 16 6S

• Average Croat teetiona between S5 and 8S MeV. aa read from Fi*». 4 and 5 of Ref. 4. _

, —yVWS/SO. aa taken from Fig. 4 of Ref. S and Table I of

* 5. Cotta. L. Paaquaiini. G. Piragino. and L. Roaeio. Nuovo Clmento

42. JOS (1906).

, G. auboo. a Cotta, a Ferroni, R. MaJvano. and G. Rlcco. Nuovo

Cimesan 42. MS (1966).

form NBS-418

(REV. 7* I A* 04) .JSCOMM-OC 28010-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS

PHOTONUCLEAR DATA SHEET 535
REr . EL £M. SYM. A z

V. Bnma, S. Lo Nigro and C. Milone

Lettere al Nuovo Cimento 2 , 271 (1971)

Tl

METHOO ! REF. NO.

81

71 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

G,F ABY THR-999 C 300-999 FRAG-I 4 PI

999 = 1000 MEV

3 rb

21-

Tl

Hg

'[

•• f’= * Au

200 400 600 800

(MeV)

1000 1200

i. - photortssion cross -sections per equivalent quantum <r„ against the maximum onertrji of photon.-.. Au: o ref. (•), a ref. (•), • our result*: lift: • our results; Tl: a ref. (*). a our results. The ilashcd curves represent the At* calculated by tbo least-squares method taking into account our results only.

a

6b

Au Hq Pb

f. 1000 /ft soo

too

too soo

r —•

~’0°: V'

V y'J /

, A-'

.0

'

ft 100

10 n 30 82 82

y|g, >, - s, -values. deduced in our present and provtous () experiments, rc|mrlvd r». the atomic immlx-r Z of the clcnicut* (or only some energy values.

(over

)

PO«M NBS-418

|R€V. 7-1 +- 64 > USCOMM-OC 2(5 0 1 0- P4 4 PHOTQNUCLEAR DATA SHEET 536

U.S. OEPARTMENTOF commerce

NATIONAL. BUREAU OF STANOAROS
T WILK I . - b'isMion croxx-HCvt ion* prr photon hrliccrn oml 1

1

H 14 1 V[i-V.

<T t (ll|l>) Our results I’rrvinus results

Hi 7.(1 £- 0.2 7.M - 0.0 ( s

| 7.S (l.« 1*;

IM> 3.3 - (». 1 3.4 — 0.3 (*)

Tl l.!> il. 1 3.1 • o,2 («)

lltr 1.5 — 0.

1

Au 1.10 ± 0.1)0 1.25 — o.l (*)

I

b*

L Tl

! L

i ;

i

I i i i 1

1 >

1

! l! 1

1 1 f ! 1 1 i

1 i !

—

r i 1 , - l

|

l

' I iM' 1 uLiJ.-i.-- *

’ tT77

Au -t-M— T * T t l-1 *— 1 1 OU * . . i . T

» . 200 400 600 800 1000 S (MeV)

Kitf. 3. - Kissiou cross-section per photon «, of Tl, Ug ami Au against J£YmM . The dashed straight

lines represent the values <r* = const, calculated as suggested in ref. (•).

10

e io

a

b*

10

'H'W Cs Pt Hg Pb 8i Hf Ta Re Au Tl

29 30 32 _oJ

33

k'ig. t. - S, -values e*. I lot the elements with atomic number in tho mnffo froiu 72 to 83: • our

results, o ref. <*). o ref. (•). The dashed curves is drawn b>- eyo.

C) \', r|MM s, l.o Xmim smi i'. Miuivk: HoH. S. /•>’., No. "it till i!8*si.

t «) V, Kuu%, r. 1,0 N itmo ami 1*. Miijim;: Isll. .Yuuri# 3, >'| i 2 lltlilO. Cl V, Kss.li i*. i.«» \ ooui ami C. Ml mink: ///I. .Ymo'o i'lmruto, 2, III <IU?I>. Cl 3. JCSUKMMAM sod II. Ml mrr.IJir.HI I’hm, Hr*., I0d, AsA 1 1 HA! ). Cl II. II. ills 1‘lHViUHi ill 1‘tlMTIXI, K. |I*SI. I llllllll'Ni 11. I'llTKMIU ami il. lllSIU VIIOJI I .Yarns* I Umrrnlu,

22. 133 ( until

C) A. Vi llmu/MOVli Yu. N. 1UXYUK and 1*1 V. SUKOKIXI Urn*. Jaunt. .Vurt. /**s»., i, 312 (Unix*.

537
REF. EL EM. SYM.

I Z V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

T1 81

METHOD REF. NO. 76 Em 2 egf

REACTION RESUL T excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.F ABY THR-999 C 999 TRK-I 4PI

Table 1 Measured values of <r, at £= 1000 MeV and deduced values of c, assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z*/A

(mb)

£0

( MeV) (mb)

Bi 3196 123 ±0.6 200 7.6 ±0.6 Pb 3145 5.4 ±0.4 220 3.6 ±0.3

T1 3110 4.1 ±03 230 2.8 ±03

Au 31.68 10 ±0.15 240 1.4 ±0.2

pt 31.18 l.l ±0.08 255 (8 ±0.7) x 10" 1 Re 3021 (3.7 ±03) x 10-* 280 (19 ±0.3) x IO' 1 W 29.78 (32 ±0.3) x 10" 1 290 (2.8 ±03) x IO

- ‘ Ta 29.45 (33 ±03) x 10* 1 300 (2.7 ±0.3) x 10" 1 Hf 29.04 (I.7±02)x 10" 1 310 (1.4±0.2)x lO

-1 Yb 2821 (13 ±0.1) x 10 -1 330 ( 1.2 ±0.1) x 10' 1 Tm 28.18 (72 ±0.8) x 10' 2 335 (6.8 ±0.8) x IO-2 Ho 2721 (3.6 ±0.4) x 10“ 2 355 (3.5 ±0.4) x IO" 2 Dy 26.80 (16 ±03) x 10* J 360 (2.5 ±0.3) x IO* 2 Tb 2628 (15 ±03) x 10- 1 370 (22 ±0.3) x IO’ 2 Gd 26.04 (1.6 ±0.2) x io

* 2 3 S0 (1.7±02)x 10‘ 2 Sm 2526 (13 ±0.2) x IO' 2 390 ( 1.4 £02) x IO* 2 Nd 24.96 (92 ±0.9) x 10"

405 (1 ±0.1) x 10" 1 Ce 24.00 (8 ±0.9) x 10“ 1 420 (9 ±1 )xl0‘ J La 23.39 (8.4 ±0.9) x 10" 3 430 (1 ±0.1) x IO -3 Sb 2136 (12 ±02) x 10" 2 460 ( 1.5 ±0.3) x IO" 2 Te 21.19 (8.8 ± 1 ) x 10* 3 465 ( 1.2 ±0.2) x IO

-

1

So 21.06 (13 ±02) x IO* 2 465 (1.7 ±0.3) x IO* 2 Cd 20.49 ( 1.7 ±03) x IO

-

3

470 (22 ±0.4) x 10* 2 Ag 20.47 (2 ±03) x IO

-

2

470 (2.6 ±0.4) x 10" 2 Zn 13.76 (2 ±0.4) x 10" ‘ 515 (3 ±0.6) x 10“ 1 Cu 13.44 (2.4±0.5) x 10“ 1 515 (3.6 ± 0.8) x 10* 1 Ni 1335 (14 ±0.5) x 10" 1 510 (3.6 ±0.8) x IO

-

1

Fe 12.10 (3 ±0.6) x 10'* 510 (4.4 ±0.9) x 10" 1

Fig. 2. Nuclear fissiiities as a function of Z

1!A. Experimental points: solid circles represent our data;

squares, the data from ref. *); open circles, the data from ref. ); and crosses, the data from (p,fi experi- ments20

). The straight line is the best fit calculated from our data for Z

1

, -1 > 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

).

4 A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6., 512 (1968) . 7T. Methasiri et al., Nucl

.

Phys. A167 , 97 (1971) . 12

J.R. Nix et al., Nucl. Phys.

81, 61 (1966) . 20

N.A. Perifilov et al., JETP

(Sov. Phys .) 14, 623 (1962);

Proc. Symp. on the physics & chemistry of fission, Salzburg

1965, vol . 2 (IAEA) Vienna,

1965, p.283

.

form N3S-418

IR EV. 7-1 4-64) USCOMM-N8S-OC PHOTONUCLEAR DATA SHEET 538

U.S. OEPAHTMENTOF COMMERCE

NATIONAL BUREAU OF STANDAROS
R.M. Laszewski and P. Axel

Phys. Rev. C 19, 342 (1979)

ELEM. SYM.

Tl

A z

81 METHOD REF. NO.

79 La 1 hq

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,G ABX 4- 7 D 4-8 NAI-D 135

(4. 5-6. 6) 4. 5-7.

5

Hauic nhoton scatteriiia cron sectians were measured for ”*13i, “*Pb, *Pb, 704Ph, Tl and H g at

energies between 4.5 MeV and the neutron emission threshold, with an energy resolution in the

range between 50 and 150 k«V. This resolution was sufficient to determine the strengths of most of the

strong levels in this energy region for ^Pb; there are concentrations of strength in a few levels n<nr 5.5 and

7 MeV with the sum of S(El)f valuta equal to about 0.34 and 0.65 h

: fm1

, respectively, easa of thess two groups of levels corresponds to only about 0.63% of the electric dipole sura rule. In the neighboring

approximately the same amount of strength is distributed, among many more energy levels;

although this strength is spread in energy more than it is in 701 Pb, it remains relatively localised.

FIG. 7. Natural T1 (71$ 205 Isotope, 29$ 203 isotope): See caption of Fig. 4.

FIG. 9. Tl: Inferred total photon absorption cross

section. Ey (MeV)

form N3S-418

(REV. 7-1 4-64) USC OMM-N0S-O C

FIG. 12. Comparison of the measured cross sections

of, respectively, from the top, J®Pb, 23T Pb, :o *3l, Tl, and Hg.

PHOTONUCLEAR L 539

1MMERCE

•NOAROS
TABLE IV. Parameters used in Inferring from (Level spacing is auBnirwwt to be of

the form B<= r*5/r .)

Nucleus A (eV) £, (MeV) T (MeV) re (eV) Ref.

Hg 83 8.03 0.86 0J2 15,22,23 Tl 430 6.54 0.90 0.12 15,22,23

15

G.A. Bartholomew, E.D. Earle, A.J. Ferguson,

J.W, Knowles, and M.A. Lone, in Advances

in Nuclear Physics

>

edited by M. Baranger

and E. Vogt (Plenum, New York, 1973),

Vol . 7, p. 229.

22

J.E. Lynn, The Theory of Neutron Resonance

Reactions (Clarendon, Oxford, 1968)

^H. Molecky, Sov. J. Nucl . Phys. 13, 133

0971). —

TABLE VI. Transition strength comparison at 5.5 and 7 MeV.

5.0—6.0 MeV 6.5-7 .5 MeV

Nucleus /<rrrd[£(MeV mb) %2MPb strength fff^SOAeV mb) %2B8Pb strength

B1 10.4 68% 10.7 44%

20»pb 15.2 100% 24.4 100%

20Tpb 12.6 83% ... ...

20«pb 15.3 104% 20.2 83%

Tl 8.3 55% 7 Ji 32%

Hg 11.6 76% • • • • * *

540
ref M. Schumacher, F. Smend, W. Muckenheim, P. Rullhusen, H.G. Borner

Z. Phys. A300, 193 (1981)

EL EM. SYM.

T1

A z

81

METHOO REF. NO. 81 Sc 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE Tvp e range angle

G,G ABX 2-7 2-7 SCD-D 90

Elastic scattering by nuclei in the range of mass numbers between 64 and 238 has been

studied with monochromatic photons in the energy range between 2 and 8 MeV. These

photons were provided either by a Ti(n, y) source installed in the tangential through

channel of the Grenoble high flux reactor, or by 2J, Na and 56Co sources produced by

deuteron bombardment of A1 or Fe at the Gottingen cyclotron. The photoexcitation of

23 nuclear levels has been observed and the decay properties and groundstate widths of

the majority of these levels have been determined. For the lead scattering target the co- herent elastic differential cross section has been studied in detail. There is evidence that below the photo-neutron threshold the elastic scattering via virtual photoexcitation of

the nucleus can be approximated by extrapolating the real part of the Giant Dipoie Resonance amplitude along a Lorentzian curve. Coulomb corrections to Delbriick scat- tering seem to play a small role at 6.5 MeV.

2.6n-6.Jfi„ MEV

TaWe 1. Differential cross sections for elastic scattering {daid Q)'*s of photons from 36Co and : *Na sources by different scattering targets,

in units of ub/sr. Errors in the last digits are given in parentheses.

&

deg

Scattering

targets

2.599* (MeV)2.754 s (MeV)

3.010* (MeV)

3.202* (MeV)3.254* (MeV)

3.273* (MeV)3.452* (MeV)

90 ;38 U 52.7(25) 57.5(25) c 56(161 47(4) 456 (10)“ 34(6) 49(14)

:09 Bi 33.1130) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33(15)

n.ipb 31.5(23) 31.0(16) 35 (8) 27(3) 26.6(22) 25(4) 23 (8)

n“T! 31.5(33) - 27(12) 32(5) 24 (3) 22(7) 34(15) “‘Hg 30.0(27) - 24(10) 23(5) 25.5(13) 26(8) 20 (8) “•W 22.5(11) - 17 (7) 19(3) 18.4(15) 18(5) 21 (61 i81 Ta 20.0(15) 19.2 (6) I93(20) c 20(4) 17.3(21) 13(5) 21 (8) ls3 Ho 15.9(13) - 17(10) 13(6) 15.6(20) 18(8) - “'Nd 11.4 (7) 14.2 (5)“ 15 (7) 14(3) 24.2(12)“ 13(3) 9 (6) “Ce 11.1 19) 11.0 (5) - 11(3) 9_5(i3) 8(4) -

,i7J 3.4(10) 8.6 (5) - 9(2) 7 (l) 5(3) - “‘Sb 8.0(11) - - 10(4) 6.8(19) - 1370(50)'

"*'Sn 6.5 (7) 7.0 (5) - 5(2) 7.6 (8) 6(3) - “Cd 6.2 (5) - - 6(2) 6.6 (8) 7(3) -

120 :38 U 55.1(25) 64 (4)‘ 43(15) 55(5) 574 (10)“ 48(5) 48(11) »'Ta 27.5(15) 25.0 (9) 227(20)“ 22(5) 21 (2) 22(8) -

“*‘Nd 179(30) 17.0 (9)“ - 298(47)“ “

* 36Co source in Fe lattice

s *“Na source in Al lattice {part of data have been published elsewhere*

‘ Transitions to excited states observed in addition to the ground-state transition

J Photoexcitation of nuclear level identified from the size of the differential cross section

(OVER)

form MSS*4t8

;p £v. 7-1 U5COMM-OC 2601O-P64 PHOTONUCLEAR DATA SHEET 541

u.s. depastmsnt or co-.imsfc- national, bureau cr stanoasds
Tabic

4.

Properties

of

levels

observed

by

pholoexeiiauon

)

NI";

experimental

differential

cross

section

per

identified

isotope

or

element

for

resonance

scattering

through

0=90°

/":

spin-parity

of

excited

level,

W(Q).

angular

correlation

function;

g

=

(2f„

+I

}/(2i +

I); t0:

radiative

groundstale

transition

width,

T

;

total

level

width.

Errors

in

the

Table 2. Elastic differential cross sections da <(0(0 = 90°) in pb.sr measured with the Ti(n.y) source and compared with theoretical predictions. n

:

predicted number of levels in a J£ = 25eV interval at 6.5 MeV. Errors in the last digits are given in parentheses

Scattering

target

6.418 MeV 6.555 MeV 6.759 MeV 7.168 MeV n

exp. th. exp. th. exp. th. exp. th.

:ja U 23 (12) 10.3 _ _ _ 45

20V Bj - - 219(39) bc 8.0 12 (4) 7.4 1.5(3)- 10

5b-' 5.7 0.1 "*‘Pb 7.0(15) 8.6 - - 6.5(11) 7.4 _ _ 0.05

"*‘T1 2.586 (92)*-' 7.5 - - 13 (3)

b 6.0 _ _ 0.4 M, Hg 12 (3) 7.8 74( 17) b 6.5 6.7(15) 6.4 _ _ 3.4 M,W 159 (10)*-' 6.6 306(33)*-' 6.3 20 (2)*-' 5.6 - _ 13

‘ sl Ta 68 (4)*-' 6.3 - - 10.K12) 6-' 5.3 - - 28

l65 Ho 15 (3)

b 4.7 - 9.5( 14) b 3.9 - _ 18 "*'Ce 4.1(21) 4.1 - - 17 (l)

b-' 3.6 - _ 0.04

"*‘Sn 4.2(13) 3.0 - - 2.5 (5) 2.7 - _ 1.9 “Mo 1,474 (44)*-' 15 407(39)*-' 2.5 8.5(1 5) bc

2.3 817(258) b -' 2.0 0.5 “'Zn 2.4 (8) 1.6 - 1.8 (5) 1.5 5 - 0.3

* Transitions to excited states observed b Photocxcitation identified from size of differential cross section

‘ Photoexcitation reported in [11]

1° S

L,° £

k s

O ‘/’i rr —

-° « 00 —

30 ry ^ r*» —• m

O vn i"- rros — *00^00 0

O - o’ C (N l i 04 04 o o o’ o o o

— co r*> d d o' © o

r-~ oi O O'

, 04 04 - - I -

I <o I I I

30 *0 — n Tf fs in — oh r4 r-rr — TOiOOO — oh o' d o’ o o o

I o o o o o

>0 30 oh

o o o o

OOr^»roio^r''^OO‘'^’T“T'^''0

>

— f" r*

VOtOVOO — *0«0 — toto — — VO —

r-o4vo — *rr-vo-rvor--o^^ —

«NO'br*«b'b'b'b'b'Oo

Z' *T -T O'

- t -o »

30 *0 30 -r (— i VO VO vO vO — ‘O 'O O oh 0 0-0

3 3 £ a P P hhhIIZZ J71

O O -3 -3 3 3 2 2 ad ^

•J J3 ~ w- ^ —

3 d | ^ 3 Q

-3 a 7; •- u ^ s 3 C -*3 2

* 3 C - /» 3 U tjc 2 "1^1

^ = = -

3 3 S

30 VJ S s 5 :3s

T ZZ -r

.-a r 5 S 2 *

-— i—• a. ^ — 30 Q. ^ C,C! 3 a.

Fig. 9. Differential cross sections for elastic scattering of photons

by (Al

;0,, Bi. iBl "4,T1 and |C) "*'Hg through 0 = 90° Solid lines: calculated including R. T, lowest-order D, and N (Lorentzian

shapei scattering

542
Tl

A=203

'

REF.F. Heinrich, H. Waffler, and M. Walter

Helv. Phys. Acta 22, 3 (1956)

METHOD

ELEM. SYM. A . z

T1 203 31

REF. NO.

56 He 2 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE TYp ANGLE E RANGE

G, A RLY THR - 31 C 31 ACTI

4P1

Yield measured relative to (Yj n ) yield in S3 Cu.

REL NEUTRONS

31 MeV bremsstrahlung yields

2 °3 Tl(Y,a)

3 ° 3 Tl(Y,n) = 2.3 x

10' 5

3 o3 Tl(Y,a)

S3 Cu(r,n)"

= x 10

'

form MBS-418

(REV, 7-I4-84I J3COMM.OC 28010-P64 PHOTONUCLEAR DATA SHEET 545

U.S. DEPARTMENT OF COMMERCE

NATIONAL SLR EAU OF ST AN DA RD3
Ret- P. Erdos, P. Scherrer, P. Stoll

Helva. Phys. Acta ^

0 , 639 (1957)

Method Betatron; a yield; radioactivity; Cu p (y, n) reaction

Elem. Sym.

T1

Aef. No.

203

57 Er 1

81

EGF

Reaction

Tl(y,a) +

(7, nor)

E or AE

Bremss.

32 0.13±0.03 MeV-mb

crd E J

"• Notes

Based on yield measurement,

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(8-1-93) USCOMM-OC 18SS8-R83 PHOTONUCLEAR DATA SHEET 546
B.I. Deutch, F.R. Metzger

Phys. Rev. 122, 848 (1961)

METHOO

Radioactive source; photon scattering; Nal

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE PAN <Jtt type range

G*£ RLX 0 D 0 NAI-D DST

(279 keV) (279 keV)

LIFETIME

EL EM. SYM. A

T1

REF. NO.

203

61 De 3

81

NVB

Mixing ratio 6 — J

40.20

6=4- 1.20

E 2

M 1

Table IV Experimental values ot the coefficient A» in the angular distribution IV (8) = l +A.2P: (cos0) of the resonance radiation from the 279-kev level.

Run N’o. A 2 1 o • H-* to

t2

0.83 ±0.08

1.02 ±0.08

0.76±0.07

Average 0.87±0.08

RCVCRS6 VELOCITY FORWARD ve'-JC'TT ufr? R*;/ CEC?N

I'rc. 3. The resonance scattering cifcct as a function >>t 1 velocity oi the source. The heavv line represents the theoreti counting rale ior r.^OOXIIT" Ihe uxrcnnicnul i».t mm the first weak) source are shown lor ctimivansnii nunm,

TanL* V. Recent experimental values oi the mean gamma-ray

lifetime of the iTM-kev transition in Ti”1

.

J0-’*

T sec) Method Auihor(s)

4.7 =0.8

5.1 =0.5

5.2 ±0.6 id =0.5

5.1 ±0.4

5.10=0.30

4.26 =0. 18 4.45 =0.10

4 4 4 ±0.08

5.00 ±0.24

Resonance fluorescence Delayed coincidences Coulomb excitation*- lligtvtrequency deflection" Delayed coincidences® Delayed coincidences® Delay ed coincidences'* Delayed coincidences* Average delayed coincidences Resonance fluorescence

Metzger*

derlovtch and Dubinkin4 McGowan and stei?on* Jonanjson and .VKager'

H.isnandy el id.® C'.jrrdetzslty el of A

Pederson and Ik-ll* fcnwarzsctind and ICane*

Present work iuoOi

•Corrected for Ihe j.eott J-.-ftJm0.07 romuuted from the three induiwmlenl determinations oi the mixing amplitude: the polarisation ot t.ie Coulomb excitation , l.=0 -0.081. Coulomb recital, on mil e-..tuihce duure-cence liletunee ' I. J I .c »>. and the angular Ji.irmuuon at .he

-.jnance fluorescence radiation 1 1.20 ±nr* 31 - . t [r7,r me case, .a which r,. the half-lne n me ;r 0-tev level, war luted,

i tie value was corrected bv a factor tl t~»n, 0.0V5. where «r .a ne

total conversion coefficient.

"> K.'Era

Ue"o"ri,'ahdC. V. Dubmkin. J- Emtl Theoret. Phy-. tC.S i «>

J2. Hi (1057) [translation: Soviet. Phys. jbTP 5. .04 iios/i J.

• Nt rrt>rrence J.

1 >s-e roiercnce IJ.

* >ee reierence l •!.

- >ce reierence 15.

i >-e reierence 14.

Table III. Experimental values tor rT, the mean gamma lifetime

of the 279-kev level in TP31 .

Source r T (sec)

1 (5.10±0.28)X10-‘°

1

1 4.78±0.47) X 10-10

2

1 4.97 ±0.38) X 10-10

2 (5.00±0.58)X10-10

Average 2 (4.92±0.26)X10-‘:

Average 14-2 (5.00±0.19)X10~!0

7 , R Metzger, Proceeding of the 1954 Glasgow f>»

Vodear'and \Uson Physics .Pergamon Press, New Wk. 19m).

>2?

1 k. McGowan and P. H. Stelson, Phys. Rev. 109, 901 (1958).

19 V. Knapp, Proc. Phys. Soc. i London) V71, 104 (1958). “ E. Basnandv, T R. Gerholm and J. Lindskog, Arkiv Fysik 17. 421 1 1960).

•* v Gortxietzskv, R. Manquenouille, R. Richcrt, and .V. Knippcr. Comot. rend. 251, o5 1 1960).

* B. Johansson and T. Alvacer, Arkiv Fysik 17. 163 (I960).

'* A. Schwarzschild and J. Kane, following paper f Phys. Rev.

122. 854 (1961)].

'* E. C. B. Pederson and R. E. Bell, N'uciear Phys. 2i, 393

1 1960).

19 F. R. Metzger in Process in Suclear Physics. edited by O. R. fnsch iPcreamon Press. York. 1959). Vol. 7.

11 F. R. Metzger, /. Franklin Inst. 261, 219 (1956).

wo- -

, s>-4 i«e U5COMW-OC 23 2 ? J-

‘ i . S

.

na r. i’i *•

v. e h r c •tAUOP

PHOTOHUCLEAS DATA SHEET 547

• ' i SCE

:aro3
REF. J. C. Palathingal and M. L. Wiedenbeck

Nucl . Phys. A101 . 193 (1967)

METHOD

EL EM. SYM.

T1

REF. NO.

203 31

67 Pa 1 EGF

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 1 D 1 NAI-D L 110

Used 3 recoil to supply Doppler shift

Compared Rayleigh and resonance scattering

0.14 -

0.12

o.oe

0.06

0.04

5 0.'0-/r-72y//v////|

'

"’yr2

2 3 4 5 RUN NUMBER

Fig. 5. Values of ffrej/^Rayicieh obtained from the various runs and their weighted mean. The shaded

area represents one standard deviation to either side of the mean value (the dashed line).

Tv hle l Values of r obtained by various observers

r tnsec) Method of measurement Ref.

0.28 —0.04 beta decay recoil

i resonance fluorescence)

present work

0.408 =0.0I0 delayed coincidence U)

0.402 — 0.003 delayed coincidence ") 0.410—0.020 centrifuge (resonance fluorescence) ') 0.405 =0.008 uclayed coincidence I0

) 0.348 = 0.0I4 delayed coincidence !*) 0.403-0.025 delayed coincidence «)

0.41 = 0.03 delay cu coincidence U ) 0.32 —0.04 high-frequency defection “)

0.43 -0.05 Coulomb excitation “)

0.42 —0.04 delayed coincidence “)

O 00 II p©"4 thermal Dormer effect (resonance ikioresccnce)

*)

0.41 =0.I2 Coulomb excitation 1T > 0.18 -0.05 delayed coincidence “)

O u II p delayed coincidence

0.36 -0.10 delayed coincidence 40 ,

Wherever a parameter other than r, but one directly related to it has been quoted as the result, r is computed from this parameter. FORM NBS-418

<R EV. 7-1 4-64) U3COMM-DC 26 010- P64 PHOTONUCLEAR DATA oHEET 548

U.S. DEPARTMENT OF COMMERCE

NATIONAL 9UREAUOP STANDARDS
G. P. Ancropov, I. E. _Microf anov, A. I. Prokof ' ev & V. S. Izv. Akad. Nauk. Fiz. 3^, 116 (1969)

Bull. Acad. Sci. USSR-Phys. 34, 108 (1970)

METHOD

. ELEM. 5VM. A Russkikh

T1

REF. NO.

, Z

203 81

69 An 10 hmg

EXCITATION SOURCE DETECTOR

R £AC TION ENERGY TYPE RANGE Tvp E range

ANGLE

G ,XN ABX 7-20 G 7-30 3F3-I 4PI

451

toM« V 9-0.06^,tafi.V tap*

a. - J

a <£} dS.

«-a - j

« 9-t — 0.00225/*'^

0 b Me V( asp)

b Mn V © b/Mc V( «zp

)

b/M* V

torn 2,61 2.92 15,i 1G,0 won 2,78 2.94 15,2 16.

0

6,a b

too

too 451

100

s to u m to Fig. 1 Fig.l. CTyn + <7y f 2n versus E

y

for 203T1 (full curve and 209Bi

(dashed curve (Ref. 3)).

form N3S-418

(REV. 7-1 4-841 USCOMM-OC 260I0-P«« PHOTONUCLEAR DATA SHEET 549

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST4NOAROS
EL EM. SYM.

J A

j 2

j T1 ! 203 31

method

j P£F NO -

70 Mo 1 hrag

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYOE RANGE

G,G LFT 6 D 6 SCD-D 0-7 DST

(6.413) (6.413)

J=l/2: E=6.418 MEV

rep. R. Moreh, A. Nof, and A. Wolf

Phys. Rev. C2, 249 (1970)

g u

y 1.0 >-

0.9

LLi >

t—<

0.9

100 120 140 160 SCATTERING ANGLE

FIG. 4. Angular distribution of the elastic and one in- elastic scattered line as measured using a 20-cc Gel Li) detector.

r

—

i

i

-j—6.418

6.418 MeV Line

- 0 *»TI

*

i * t

( l/2) ~1—6-418

1 5.302 MeV Line

-*—1.116 —0

1

. i {

. .

1

i I t t

TABLE n. Partial radiation widths T, and El, Afl radiation strengths of intense transitions from the 6.418- MeV resonance state in :03T1; the level spacing D was

'•alcen 1.0 keV.

y energy

(MeV)

r,

(10‘J eV)

*S1 GO"' MeV-*)

Ajrt (10-* MeV-*)

6.418 90 9.8 338

6.139 35 4.4 145

5.302 58 11.3 390

5.132 10 2.0 67

5.008 51 11.8 384

4.366 26 6.2 212

4.777 8 2.1 73

4.377 9 2.7 94

4.533 8 2.5 86

4.483 ri 1.9 67

3.546 10 6J 216

Elastic and inelastic nuclear resonant scattering of monochromatic photons from alTl has been studied using a 20-cc Ge(Li) detector. The y source was obtained from thermal-neutron capture in titanium. The scattering isotope was Identified by using an isotopically enriched

thallium target. The energy of the resonance level in !03T1 was found to be 6.418 MeV. Assuming the high-energy lines to be primary transitions deexciting the resonance level, some

14 energy levels were found from the ground state up to 2.9 MeV, 4 of which may be identified with recently reported levels. By measuring the angular distribution of the scattered radiation, the spin of the 6.418-MeV

level was determined to be i, and thus, based on the assumption of dipole transitions, the spins of several low-lying levels were found to be either i or j. The total radiative width of the resonance level was determined and found to be r7 = 0.32* 0.06 eV and r0 /Tr =0.026. The

spectral shape of scattered radiation was found to have a strong intensity bump at about S MeV; this is discussed in the light of similar bumps obtained in (*,y) and ‘4,py) reactions on

nuclei in the same mass region.

form NBS-418

(REV. 7-1 «-«4l U3COMM-OC 2a010-p«4 PHOTONUCLEAR DATA SHEET 550

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOARO*
REF. SYM. | A Z

METHOD

Tatsuya Salto

Nippon Kagaku Zasshi 92, 164 (1971) T1

I REF. NO.

203 81

71 Sa 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

type range TYPE R AN G E

G.N ABY 7-68 C 10-68 ACT-I 4 PI

Nippon Cogotu ZouM. 92. 164—148(1971) Th« Ylaldt o( Hodlooetlvitla* Induced by (y# n) lcactl«M

with SratnstiraMung up >e 48 MoV

hy Tatsvyc SAITQ

Tlie (y, ) yield* of 12 target nuclide* have been measured

at 10, 13, 16, 30, 43 and 60 MeV brcuustrahlung try olm-rv* ing (lie induced activities.

1 lie energy dependence of tlie yield* lia* been investigated extensively in tlie nmc way a* in tlie previous work at 20 MeV Itremsslralilmtg. In tlw rase nf lieavy nurliilrs, the yields rise greatly as a

function of maximum bombarding energy up to 20 MeV, and

rise gradually from 20 MeV up to 68 MeV. I lowever, in tlie ease

of light nuclides, tlie yield* rise greatly up to 30 MeV, because

the neutron separation energies of light ones are larger than

those of heavy ones, and die bremistrahlung spectrum coven

the giant resonance and so the yields rise gradually from 30 MeV up to 68 MeV.

The yields have approximately been, estimated from the parameter of tlie giant resonance, that is tlie prak cross section and the half width, in order to compare with tlie rx|»'rimeiital data. A* a result, tlie experimental data of light nuclides and

lieavy ones are nearly in agreement with tlie estimated data

of Nathans et at., Johns ct si. and Montaibctli ct ai., but tlmac of medium weight ones arc relatively lower values. Dtpartmni tf Chtmutry, Fatuity •/ Stint*, Tthtku UutnriUy;

XtitMra-tJt*, Sand*i~thi, Japan

•: saw. ®i Johns b,

3: Nathans bt O: Monlaibrtti b

m 4

form M3S-418

in ev. 7-t 4-841 USC OMM-OC 2S010-P94

'J-S. DEPARTMENT OF COMMERCE

NATIONAL SUREAUOF STANDARDS

PH0T0NUCLEAR DATA SHEET 551
REF.

METHOD

R. Alberini, P. R. Oliva and D. Prosperi ELEM. SYM. A z Nuovo Cimento Lett. 10, 726 (1974)

T1 203 81

REF. NO. 74 Al 10 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE type range

G, G RLY 6 D 6 SCD-D 135

w— S v O co cn oo •- i ->* — » — ooo<

*jQUJINn-COiNjjjixiTi^^ 0, it oiN Q*t£» crl — co *; (>* fsifl Ul Ifl U1 V — O O) OT CT TTTTTTTTTTTTTTTTT

609.0

6 = 6.419 MEV

FIs. 2. - Decay scheme of the 6419.0 kcV lorel in : "Tl.

form N3S-418

(REV. 7- t 4-041 USCOMM-N0S-OC PHOTONUCLEAR DATA SHEET 552

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
ref. K. Masumoto, T. Kato, N. Suzuki

Nucl. Inst. Meth. 1 57 , 567 (1978)

: EL EM. SYM.

T1 203 81

METHOP i REF. NO.

78 Ma 10 ng

REACTION RESUL T EXCITATION SOURCE DETECTOR

EN ERGY TYPE RANGE T Y P E RANGE angle

G,N ABY 8-68 C 30-68 ACT ".X 4PI

G,2N ABY 15-68 r 30-68 ACT ./ 4PI

G,3N ABY 23-68 C 30-68 ACT - jT 4 P

I

Analysis is made of reactions interfering with

photon activation analysis procedures.

The activation yield curves have beer, presented for a number of photonuclear reactions in the energy range from 30 to 68 MeV, in order to evaluate quantitatively the interferences due to competing reactions in multielement photon activation

analysis. The general features of the yields as functions of both target mass number and excitation energy were elucidated from the data obtained, discussion being given on the results in terms of the reaction mechanism.

Simultaneous neutron activation due to appreciable neutron production from the converter and surrounding materials has also been studied, and, finally, the magnitudes of interferences in real multielement analysis were given in the form

of their energy dependences.

10 ' 10 * Nt

Fig. 2. Yield per equivalent quanta versus target neutron number.

Fig. 8. Activation yield curves for the reactions on Pb. T! and

Hg.

204 Hg(y, n)203 Hg, 3

198 Hg! y. n) i97m Hg. 7

204 Pb(y. n) 203 Pb.

204 Pb(y.3n) 201 Pb.

-» 203 T;<y,2n)20l Tl.

O l98 Hg(y, n) 197*Hg.

<> l99 Hg(y, p)

198 Au.

204 Pb(y. 2n)202m Pb. O

;o3 THy. n)*02 TI, O 203 Tl(y, 3n) 200 TI.

(over)

: O N 3S*4 ]8 553 u.s. departments? commerce
E

max (

M

«V)

Fig. 9. Yields of the (y, n) reactions as a function of bremsstrahlung maximum energy and target mass number. The

numerical values in the figure are yields per equivalent quanta

in mb.

554
M. Schumacher, F. Smend, W. Miickenheim, P. Rullhusen, H.G. Borner

Z. Phys. A300 , 193 (1981)

EL CM. SYM.

T1 203 81

REF. NO.

REF.

METHOD

81 Sc 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TV PC PANGS TYPE RANGE G.G ABX 6 6 SCD-D 90

Elastic scattering by nuclei in the range of ma« numbers between 64 and 238 has been

studied with monochromatic photons in the energy range between 2 and 8 MeV. These

photons were provided either by a Ti(n, y) source installed in the tangential through

channel of the Grenoble high flux reactor, or by - 4'Na and 56 Co sources produced by

deuteron bombardment of A1 or Fe at the Gottingen cyclotron. The photoexcitation of

23 nuclear levels has been observed and the decay properties and groundstate widths of

the majority of these levels have been determined. For the lead scattering target the co- herent elastic differential cross section has been studied in detail. There is evidence that below the photo-neutron threshold the elastic scattering via virtual photoexcitation of

the nucleus can be approximated by extrapolating the real pan of the Giant Dipole Resonance amplitude along a Lorentzian curve. Coulomb corrections to Deibriick scattering seem to play a small role at 6.5 MeV.

6.418 MEV

Table -I Properties of levels observed by photoexcitation. [dodO)'**: experimental differential cross section per identified isotope or element for resonance scattering through 0 = 90° /’: spin-parity of excited level: W{0): angular correlation function; g=(2/tI -r l)/(2f + 1); f0

: radiative groundstate transition width, f : total level width. Errors in the

last digits are given in parentheses

Isotope £, (MeV)

(d aid Q)nbf

( pb/srl r r^r* w{9) g r0

- r

(meV)

r

f

1 0 (meV) V

(meV)

:s«U 1754 13 (4) in 0.77 0.145 0.084 -

- 3S U 3.254 421 (5) i- 0.24 0.83 1.5 0.52(15)“

20,Bt 6.555 11 (4)- 102 - - 0.74 0.74 6 -

20, Bi 7.168 1.7 (3>- 10 s 9/2** 1.00 710 786 820 (40)* 203T] 6.418 8.75(30) 10 3 1/2* 0.28 30 102 82 (15)*

Tl 6.759 7 (3) - - - * - Hg 6.555 68 (17) - - -

1 8e»^y 6.418 5.2 (3)t0 2 1-* 0.32 1.75 2.4 *

I34 W 6.555 9.8 (10M02 (U 0.52 3.44 2.9 - H4W 6.759 46 1 10) (1) 0.58 0.17 0.13 mTa 3.010 174 (17) - 0.72 0.42 0.59 -

18, Ta 6.418 62 (41 - 0.73 0.2 0.27 c - "»Ta 6.759 4.8 (12) - - 0.01 S 0.018“ -

'* 5 Ho 6.418 10.3 (30) - - 0.035 0.035“ -

'“ 5 Ho 6.759 5.6 114) - - 0.021 0.021“ * Nd 2.754 2.6 |5) - * * Nd 3.254 14.0 (10) - - Ce 6.759 13.4 (10) - * * * -

,21 Sb 3.452 120 1 5) - 10 J - 0.60 2.9 4.9“ - ‘°°Mo 6.418 1.53 (4). 10* 1-* 0.88 52 26 25 (8)* “Mo 6.555 44 (4) 10 J (1) 0.33 15 21 - Mo 6.759 6.2 (15) - * “ Mo 7.168 8.2 (26l 10 2 ""

J [11] * W{0)gro, f= 1 assumed ‘ lV(0tg = l assumed

1 [23] (a small correction has been applied to the data of [28])

« Upper limits in case not all the transitions to lower icvels were observed

f Present work ‘ Previous work (OVER)

form NSS»41S

l R EV. 7.14.441 USCOMM.OC J6010-P44 PHOTONUCLSAR DATA SHEET 555

U.S. DEPARTMENTS? COMMiPC;

NATIONAL BUREAU O? STANDARDS
Tabic 2. Elastic differential cross sections da 40(0 = 90°) in pb/sr measured with the Tifn.y) source and compared with theoretical predictions. n. predicted number oflevels in a J£ = 25eV interval at 6.5 MeV. Errors in the last digits are given in parentheses

Scattering

target

6.418 MeV 6.555 MeV 6.759 MeV 7.168 MeV H

exp. th. exp. th. exp. th. exp. th.

239JJ 23 (12) 10.3 _ - _ - 45

20*Bi - - 219(39)*’ = 8.0 12 (4) 7.4 1.5(3)- 10 5bc 5.7 0.1 M, Pb 7.0(15) 8.6 - - 6.5(11) 7.4 - 0.05 “Tl 2.586 (92)*-' 7.5 - - 13 (3)*’ 6.0 - - 0.4 "*'Hg 12 (3) 7.8 74(17')*’ 6.5 6.7(15) 6.4 - f

- 3.4 "*'W 159 (10)*-' 6.6 306(33)*-= 6.3 20 (2)*-' 5.6 - - 13

19l Ta 68 (4)*-° 6.3 - - 10.11 12)

8 ‘ 5.3 - - 28

l63 Ho 15 (3)

8 4.7 - - 9.5| 14) B 3.9 - - 18 M,Ce 4.1(21) 4.1 - - 17 (1)*’ = 3.6 - - 0.04

M,Sn 4.2(13) 3.0 - - 2.5 (5) 2.7 - * 1.9 "“Mo 1,474 (44)*-° 15 407(39)*-' 2.5 8.5(15) 8C 2.3 817(258)*’-= 2.0 0.5 M,Zn 14 (8) 1.6 - - 1.8 (5) 1.5 - 0.3

* Transitions to excited states observed 8 Photoexcitation identified from size of differential cross section

‘ Photoexcitation reported in [11]

556
-

A=205

I

3

|

j

1

REF. A. El Sioufi, P. Erdos and P. StoLI

Helv. Phys. Acta 30 , 266 (1957)

EL EM. i VM. A

T1 205 51

METHOD

57 El 2 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type ranse G,A ASX THR-32 c 32 ACT1

4PI

Tabella 1. Charaktcristiache Daten bekannter (y, a)-Anregungskurven.

3t

: Bn—teeneigie. Emul : Gammaenergie beim WirkunggquerschnitteiaaxiinqTO

in MeV. cr^a*; Maximaler WLf> ungsquer"chmtt is Mikrabarne. e* MeV

Erntx MeV

^nu

fib

Cu«» 13 21 1500 Rb« 15 22 100 Ti*w 20 29 100

form N 8S>4(8 mev. 7-I4-94) U3COMM-OC 290I0.P94 PHOTONUCLEAR DATA SHEET 559

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUR&AUOF STANDARDS
Ref- P. Erdos, P. Scherrer, P. Stoll

Helva. Phys. Acta ^0, 639 (1957)

Elem. Sym.

T1 205 81

Method . . _ 65/ \ Betatron; a yield; radioactivity; Cu (y, n) reaction.

Ref. No.57 Er 1 EGF

Reaction E or A E S'

dE J

rr Notes H

205

(V,a

Tl205

(Y,na)

Bremss.

18-32

25 . Oil .

0

0.35±0.07 MeV-mb

0.16 MeV-mb

ct = 95 ±20 ub. max

Integral to 32 MeV.

Fi-. 13. Wirkunt'squcrschnittsverlauf dor Kcaktioncn Tl5#s

(;*,*) Au:01 und

U.S. DEPARTMENT OF COMMERCE

NATIONAL auREAU OF STANDARDS

form NBS-418

(S-1-S3) use OMM*OC tSSSS-Pea PH0T0NUCLEAR DATA SHEET 560
K. N. Geller. J. Halpern, and E. G. Muirhead

Phys. Rev. U8, 1302-12 (i960)

EL EM. S YM. A

T1 205 81

METHOD

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE HANGS TYRE RANGE

G, N N0X THR C THR BF3-I 4 PI

THRESHOLD

Table L Summary and comparison of neutron separation energies inferred from present threshold i^uremenU with values predicted from mass dot* end reaction energies. All energies arc expressed in the ccnter-of-maas system in Mev.

UrncliiHI Nu. runs Present results Other results Method Reference

T1»»(7.»)T15IM 7.515±0.029 7.62 d=0.l7 LSA

• i. a. Huixenaa, Phyuc* 21. 410 (19SS).

- o nu N 8S-A13

It • •/ MU*'

U.S. DEPARTMENT OF COMMERCE

NATIONAL aUREAUOF ST AN O A SO 3

r*« d PKOTONUCLSA.*? DATA SHEET 561
REF. G. P. Antropov, I. E. Mitrofanov, A. I. Prokof'ev & V. S. lav. Akad. Nauk. Fiz. 34, 116 (1969)

Bull. Acad. Sci. USSR-Phys. 34, 108 (1970)

METHOO

j ELEM. SYM. A Russkikh

II

REF. NO.

205 81

69 An 10 hxng

reaction RESULT excitation

ENERGY

SOURCE DETECTOR

TYPE ANGLE RANGE TYPE range

G,XN ABX 7-20 G 7-30 BF3-I ~I 4PI

452

I0H|V J0f-«V

I AO cop* J

o (£) dS% 0 *. 1

S 1 0 * - J

a (hVKVB.

0 b/MaV

b Me V( axp

)

b /Ma V( « k P )

,0*T1 2, Cl 2.02 15,1 10.

0

2,78 2,»i 15,2 10.

o

5 s io u m is ist

T,**v

Fig. 2

Fiff.2. ayn + ^y t 2x\ versus Zy for 205T1 ( fuli curve) and 208 Pb

(doshed curve (Ref. 1)).

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26010-P64 PHOTOHUCLEAR DATA SHEET 562

u.s. departmentof commerce

NATIONAL. BUREAU OF STANDARDS
REF. ELEM. 3YM. A 2 R. Moreh and A. Wolf

Phys. Rev. JLS2 , 1236 (1969) T1 205 31

METHOD REF. NO.

69 MO 2 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE T Y P £ RANGE type range

G.G LET 7 D 7 SCD-D 0-9 DST

(7.646) (7.646)

Ground state radiation width of the

7.646 MeV level is I* = 0.57±0.06 eV.

Fig. 6. Decay scheme of 7.646-MeV level of ,“T1 showing

level energies and corresponding branching ratios as constructed by assuming that ail high-energy 7 lines in the scattered-radiation spectrum are emitted in primary transitions. Most probable

spin values of some levels assigned in the present work are shown; The parity of the scattering level shown in parentheses ia uncertain1.

Tabu III. Partial radiation widths I\ and £1 radiation strengths kgy of intense transitions from the 7.646-MeV resonan

state in !niTl. The levs! spacing D was taken to be 1.0 keV.

Transition energy (MeV)

Level

energy (MeV)

r, (eV)

(10~» MeV">)

7.646 0 0.569 36.7 6.500 1.146 0.040 4.2

6.191 1.455 0.015 1.8 5.676 1.970 0.058 9.1 5.638 2.008 0.025 4.0 5.548 2.098 0.027 4.5 5.422 2.224 0.019 3.4 5.087 2.559 0.044 9.6

4.924 2.722 0.030 7.2 4.897 2.749 0.018 4.4

4.753 2.893 0.028 7.5 4.628 3.018 0.018 5.2 4.466 3.180 0.012 3.9 4.358 3.288 0.010 3.5

SUBTRACTED SCATTERED SPECTRUM Tl-Bi >

Fig. 4. Scattered 7- ray spectrum from a T1 target after substracting the contribution of a comparative Bi nonresonant

scatterer of Fig. 3. Tne bump of strong intensity 7- rays around

5 MeV is clear.

U.S. DEPARTMENT OF COMMERCE

form NBS-418 NATIONAL BUREAU OF 3T ANOAROS

IR EV. 7.1 4-641 USCOMM-OC 260I0-P64 PHOTONUCLEAR DATA SHEET 563
AEr. S. Ramchandran and J. A. McIntyre

Phys. Rev. _L72, U53 (1969) Ti 205 81

. METHOD REF. NO. 69 Ra I hrag

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

G.G LFT 8 D 8 NAI DST

_ r~, fin V /m r

over]

form N8S-418

(REV. 7-14-64) U3COMM.QC 26010-P64 PHOTONUCLEAR DATA SHEET 564

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
®

L.

V.

Groshev,

V.

N.

Lutsenko,

A.

M.

Demidov,

and

V.

I.

Polekov.

Atlas

of

Comma

Spectra

from*

R.

Moreh

and

G.

Ben-Yaacov,

Nuclear

Research

Ceater —

Nefev

Report,

NRCN-180,

1067.

Radiative

Capture

of

Thermal

Xeutrons

(Pergamon

Pres?,

Inc.,

New

Yotk.

1059).

(unpublished).

*£.

B.

Shera

and

D.

\V.

Hafemelster,

Pliys.

Rev.

150,

894

(1966). •

L.

V.

Groshev.

A.

M.

Demidov.

G.

A.

Kotelnlkov.

and

V.

ft.

Lutsenko.

Nucf.

Phys.

58.

465

(1964);

•H.

H.

Bolotin

(private

communication

from

L.

M.

Bollinger).

G.T.

Ewan

and

A. J.

Tavendale.

Nud.

Instr.

Methods

26,

ltJ(l964). f

See

Ref.

24a. c1 r>V.

<* -I S £ «

H- H- H- o o o

H-o

Ifo 8 2 S

H- H- <* 0 0 3 — P *

*•

a

a ^ o

H- H- 14- — o o 3

s.4 3 2 1 i no

N> K>

Q l i i

04 CO ha T “

»S4 ^K> ^ 1 i A

vO ^ Ni K» M M W l 1 i — O 2 f **i a £ 2b

W 5?

53

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(AS3 2

ffo3

JO mO

00

ffo

ff ff ff o © o

ffo© 001

ff©2

ffo

ffo

ff©s s

ff ff o o 3 8 O* Ol

H-o 3 3

Ifoo nQ.

as

94

a• Ifr o « o o o o ill 3 O <f» t* Crf M 9. ^ ^ ^ ^

Os 0» *— G* *VM

's

N) \M \N < £S?

S'li

<S2o

31? 2 L a

565

Tabt.f

II.

Experiment

compared

to

theory

assuming a

pure

dipole

transition.
R. Cesareo, M. Giannini, P. R. OLiva, D. Prosperi, M. C. Ramorino

Nucl. Phys. A141 , 561 (1970)

EL EM. SYM.

T

1

METHOD

205

REF. NO.

70 Ce 1

31

egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE type range

G ,G SPC 3 D 3 SCD-D 0-3 145

(7.646) (7.646)

Table 1 3 - 7.646 MEV

Energies and intensities of clastic and inelastic •/- rays scattered from a T1 target Ey (keV) Iy

(rel) Energy levels % pres, work *) ») *) (keV) (MeV) (McV) (keV)

7646 61.7 ±9.2 0 0 0 0

211 ±5 205 ±2

623 ±6 615 ±5

6505 ±3 3.60±0.55 114-1 ±3 1.14

1.21 6309±3 0.80 ±0.1

5

1337±3 1.34 6213±3 1.75 ±0.30 1433 ±3 1.43

1.48 6089 ±3 1.25 ±0.20 1557 ±3 1.58 6071 ±5 d

) 0.75 ±0.15 1575±5

5772 ±4 d

) 0.50±0.15 1874±4 1.86 5681 ±2 7.7 ±1.2 1965 ±2 1.96 5645±3 3.35 ±0.50 2001 ±3

2.04 5556±3 2.90 ±0.45 2090 ±3

2.12 5483 ±3 1.00±0.20 2163 ±3

5436 ±5“) 0.45 ±0.1

5

2210±5

5424±3 2.00 ±0.30 2222 ±3

5346±3 0.65 ±0.15 2300 ±3

5331 ±3 0.75±0.15 2315 ±3

143

149

5088 ±3 3.4 ±0.5 2558 ±3

2.61 4977 ±4 0.30±0.10 2669 ±4

169

4941 ±5 0.25±0.10 2705 ±5

4923 ±3 2.05 ±0.30 2723 ±3

4895 ±3 1.05 ±0.20 2751 ±3 174 4750±3 1.75±0.30 2896 ±3

4625 ±3 0.85±0.15 3021 ±3

4470 ±5 0.50±0.15 3 1 76 ± 5 4357 ±3 0.65 ±0.1

5

3289 ±3

*) :o# Pb(t,'x) jn5Tl reaction. The errors are -20keV. Ref. I0

). b

) Ref. “)• No error is given.

c

) Ref. ,J

). d

) The evidence for thisy-transition is regarded as uncertain.

10) S. Hinds, R. Middleton, ). II. Djerrcgaril, O. Hamm and O. Nathan, Nucl. Phys. 33 (1966) 17

Jl)r J. P. Wurm and E. Crosse, Phys. Lett. 2SU (1909) 413

12) C. Lcderer, J. M. Hollander and J. Pcrlntan, Table of isotopes (J. NViley and Sons Inc., New

York, 1967_) p. 394

over]

"Opm NQS-418

IR ev. 7-1 JSCOMM-OC 2fi0t0*P64 PHOTONUCLEAR DATA SHEET 566

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
lUDULU

s

¥ -

¥

1T

4-

u

~~

i ~~!

m

zn

i—i—

i—h —i"h

saojuao

_L_i L

2720

JL_L

3021

2806

2222 m2000

2001 1968

1575 1557

1431 1137

<15

’ll

Fig. 5. The energy levels of 10*T1 as observed in the present work. The dashed lines indicate that the

existence of that level or transition is questionable567
ref. R. Moreh, S. ShloniOj and A. Wolf

Phys. Rev. C2, 1144 (1970)

I ELEM. SYM. A i Z

MFTHOO

T1 i 205

RE F . NO.

70 Mo 2

81

hmg

excitation SOURCE OETECTOR

R E AC. TION ENERGY TYPE RANGE T Y PE R AN GE ANGLE

G,G ABX 8 D 8 SCD-D DST

(7.646) (7.646)

8 = 7.646. LFT

TABLE III. Summary of the results of spies, parities, and total widths of resonance levels excited by y rays obtained from neutron capture in iron. Parities in parantheses are uncertain.

Isotope Energy

(MeV)

<5 = |£r -£t | (eV) J\ Transition r0 /rr (=8%) U0-3 eV)

50 Cr 3.3S8 18 *1 0" 1 ... 0.90 750x200

52 Ni 7.646 14 ±1 0"" 1- £1 0.64 430 ± 50

:4 Ge 6.018 4.5±0.5 0* 1- £1 0.19 120 ± 15

73 As 7.646 7.4 ±0.3 3/2- 1/2^ +) ... 0.11 360 ± 100

,03 aS 7.632 9 ±1 1/2- 3/2 ... 0.7 2x 1

:i2 Cd 7.632 4. 3x0.4 0* 1- £1 0.55 36 ± 15

l:3 La 6.018 3.2± 0.6 7/2* 7/2" £1 0.50 51ti4 uipr 7.632 5/2* 5/2* Ml 0.46 ^^24 • —^

205-pj 7.646 9.3± 0.3 1/2* l/tf _) ... 0.58 930 x 90

2°3p b 7.279 7.1±0.3 0* 1* Ml 1.00 780± 60

TABLE rv. Effective elastic scattering cross section

(irr )=a7 (r0 /rr

)'ir(rl)p f

l,), where 6, J, r0 , Tr were

taken from Table HI. The temperature of the scatterer was 300*K, while that of the iron y source was 640*K.

Target

Resonance

energy (MeV)

\°V> imb)

50 Cr 3.338 905

i2Ni 7.546 569

74 Ge 6.018 61

75 As 7.646 4.4

105 Ag 7.632 3.5

112 Cd 7.632 193

,33 La 6.018 39 uipr 7.632 20

205T1 7.646 574

208pb 7.279 5560

foum NBS-418

IBEV. 7.1 4-«4> USCOMM.OC 290I0.P94 PH0T 0NUCLEAR DATA SHEET 568

U.S. DEPARTMENT OF COMMERCE

national bureau of stanoaros
REF.

METHOD

ELEM. SYM. A Z E. D. Earle, J. W. Knowles, M. A. Lone, G. A. Bartholomew

Nucl. Phys. A257 , 365 (1976) T1 205 31

REF. NO.

i 76 Ea 1 egf

i REACTION RESUL T EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

OtS ABX 3- 8 D 3-8 NAI-D 90

Fig. 4. The y-ray quasieiastic scattering cross section for 205T1 as a function of 7-ray energy.

FORM N3S-418

IREV. 7- I 4-341 use OMM-N BS-OC PHOTONUCLEAR DATA SHEET 569

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS

DEFINITIONS OF ABBREVIATIONS AND SYMBOLS

Note: In this list definitions are given for various photoneutron

reactions in which the following symbols are used: N, NL, nN, SN and XN. Corresponding definitions apply for reactions involving other nuclear particles

where the symbols N (neutron) is replaced by, e.g. P, D, T, HE, A etc. Where

unknown reactions result in the production of a specific radionuclide, the

chemical symbol and mass number is listed as the reaction product, e.g. a G,NA22

reaction in 59 cq.

A alpha particle response function. Contrast

with D * discrete.

ANAL analysis

CCH cloud chamber

ABI absolute integrated cross-section

data CF compared with

ABX absolute cross-section data CHRGD charged

ABY absolute yield data. Often means CMPT Compton

cross-section per equivalent

quantum is listed. COIN coincidence, coincide

COINC

ACT measurement of induced radioactivity of the target COH coherent

ASM asymmetric, asymmetry CK Cerenkov

AVG average D deuteron or discrete. When

discrete, it is used to

BBL bubble chamber describe a photon source or

a detector response function.

BEL reduced electric radiative Contrast with C = continuous.

B ( EL

)

transition probability

DLTE energy loss

BF3 BF 3 neutron counter with moderator e.g., Halpern detector,

long counter

DLTQ momentum transfer

DST distri bution

BML reduced magnetic radiative

transition probability, B (ML

)

DT BAL detailed balance

BREAKS levels located by "breaks" in the

yield curve

E electron

E/ inelastically scattered

BRKUP breakup electron

BRMS bremsstrahlung E+ positron

BTW between EDST energy distribution or spectrum

C continuous. Used to describe a photon source or a detector E/N used only to indicate a coinc

dence experiment as in (E,E/N

571
N stands for any outgoing

particle measured in coinciKE kinetic energy

dence with an inelastically L may be an integer or zero scattered electron. Distin- that always follows a reaction

guish from eg., (E,N) which is product symbol. This is used

used to represent an electron to indicate transitions to

induced reaction when only the specific states in the residual

outgoing particle N is detected. nuclide. When the letter is

used as in (G,NL) the cross

EMU emulsions (photographic plates) section given is that for the sum of transitions to two or EXCIT excited more specific final states.

F fi ssion LFT excited state lifetime

FMF form factor LIM 1 i mi t

FM-1 inverse femtometers LV ,LVS level, levels

FRAG fragment LQD liquid

G photon MAG magnetic spectrometer

G/ inelastically scattered photon MEAS measurement s

)

G-WIDTH gamma-ray transition width MGC magnetic Compton spectrometer

HAD hadrons, hadron production MGP magnetic pair spectrometer

HE ^He particle MOD moderated neutron detector not

He3 employing a BF 3 counter, e.g.

rhodium foil, Szil ard-Chalmers

INT interaction, integral,

intensity

reaction, 3 He, 6 Li reactions,

GD loaded liquid scintillator.

etc.

INC i ncludes

MSP mass spectrometer

ION ionization chamber

MULT multiple, multi pole, multiplicity

ISOB i sobari

c

MU-T used only in combination with G

ISM isomer to indicate a total photon

absorption cross section measureJ multiplicity of particle ment, i.e. (G,MU-T)

defined by following symbol

e.g. (G,PJN) with remark N neutron (see also XN and SN).

J = 2, 3, 5,

7

The notation (G,N) is used to

i ndi cate a reacti on i n whi ch only

JPI spin and parity of a nuclear a single neutron is emitted, i.e.

J-PI state the reaction that can, in many

cases, be measured by observing

K second multiplicity index, e.g. the radioactive decay of the

(G,JPKN ) with both J & K positive integers greater than 1 residual nuclide.

572
nN where n is any integer. (G,nN) SN sum of neutron producing

indicates the sum over all reactions, a( Y,SN)=a(y,N)

reaction cross sections in which

n neutrons are emitted.

+ a(y,NP) + a(y ,2N) + o(y,3N)

+ etc.

NAI Nal(Tl) spectrometer SPC photon or particle energy

spectrum

NEUT neutron(s)

SPK spark chamber

NOX no cross-section data

SPL spallation

P proton (see also XP)

STAT statistical

PART particle! s)

SYM symetric, symmetry

PHOT photon! s)

T triton

PI pion, usually written as PI+,

P

I - , PIO to indicate charge TEL counter telescope

POL polarized or polarization THR threshold for reaction or threshold detector, e.g,.

Q-SQUAR momentum transfer squared (q2

) 29 Si(n,p) 29 Al.

RCL recoi

1

TOF time-of-fl ight detector

REL relative TRK tracks of particles or fragments observed in solid

RLI relative integrated cross- materials (glass, mylar, etc.)

section data

TRNS transition

RLX relative cross-section data

UKN unknown

RSP reaction spectrometer UNK

RLY relative yield data VIB vibrational

SCTD scattered VI R PHOT virtual photon(s)

SCD semiconductor (solid state)

detector

XH all neutrons, total neutron

yi el d, a (y ,XN ) = a(y,N) + 2 a (Y,2N) + 3a(Y,3N) +a(y,NP) * etc.

SCI scintillator detector other than

all protons, total proton yield Nal, e.g., Csl, KI, organic

TTTquid or solid), stilbene, He

XP

SEP

a (Y ,XP ) = ct(y,P ) + a(Y,NP) + 2a(Y ,2P ) + etc.

reaction products defined in

separati on

XX

SEP ISOTP separated isotope used XXX REMARKS

SIG SIGMA (cross section) YLD yield

573
4PI .a 4ir geometry was used or a method like radioactivity or a total absorption measurement

999 energy defined in REMARKS * or @

$ indicates the measurement

involved beams or targets

that were either polarized

or aligned, or that the polarization of the reaction

products was determined.

The polarized particle is

indicated in REMARKS.

symbols used to indicate that

the units associated with the

numerals on one or both sides

of the symbol in a specific

column are not MeV. The units are defined in REMARKS.

574
N_B_S«114A tffgy. 2*ac) U.So OSPT. OF COMM. bibliographic data

SHEET ( See instructions)

4. TITLE AND SUBTITLE

1. PUBLICATION OR

REPORT NO.

2. Performing Organ. Report NoJ i. Fuel, cation Oat?

Photonuclear Data-Abstract Sheets

1955-1982

5. AUTHOR(S)

E.G. Fuller and Henry Gerstenberg

*• PeRPOw’'N= orcanization ~l 7, M„ was. ... NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON. D.C. 20234

9. SPONSORING ORGANIZATION NAME AND COMPLETE ADDRESS (Street. cT^Stote. ZIP)

7. Contract/Grant No.

8. Type of Report & Penod“c7^7

10. SUPPLEMENTARY NOTES

Document describes a computer program; SF-185. F!PS Software Summary, i, attached. “•

cJ

formation. ,t .ncludes a silicon

t ~

Jnfn rmaHnn^nf

C

? Ver most

. information

cl asses of experimental photonuclear data leading to of the electromagnetic matrix element between the ground and excited states o a given nucleus. This fifteen volume work contains nearly 7200 abstract sheets and covers 89 chemical elements from hydrogen through americium. It represents a twenty seven year history of the study of electromagnetic interactions. The sheets are ordered by target element, target isotope, and by an assigned bibliographic reference code. Information is given on the type of measurement, excitation energies studied source type and energies detector type, and angular ranges covered in the measu^^nt

ft

^

VnuclldTn^ied

he re,6Vant fi9UreS 3nd tab,SS « * separatiTsheet'

12. KEY WORDS (S,* to twelve entries; olpnobet.cal order; cop.to/ize only proper names; and separate key words by semicolons.'' fea«?ons

e ' emen “’ exper

TMenta ' ' 1s °‘°pes ’ TMcl.«r Physics, photonTcTear

13. AVAILABILITY

| 1 Unlimited HU For Official Distribution. Oo Not Release to NTIS Q From Suoermtendent of Documents, U.S. Government Printing Office. Washington. O.C.

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