NATL INST. OF STAND & TECH

AlllDb 2 b 2 7 5 7

NBSIR 83-2742 -

Photonuclear Data - Abstract Sheets

1955 - 1 SS2

Volume XH (Lanthanum - Lutetium)

U.S D6PART MENT OP COMMERCE

National Buraao of Standards

National Measurement Laboratory

Center for Radiat'on Research

Washington, OC 20234

1 'Sia r

U S. DEPARTMENT OF COMMERCE

Foe

100

. U56

83-2742

1955-1982

Vol- XI

I

PEAiJ Or STANDAP03

NBSIR 83-2742

r # # PHOTONUCLEAR DATA - ABSTRACT SHEETS

1955 - 1982

VOLUME XII (LANTHANUM - LUTETIUM)

ms

kbearch information CENTER QC

f 00

rtss-m

M y/l

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 i

Introduction 1

Lanthanum ( A= 139 ) 3

Cerium (Natural) 45

Cerium (A=138) 75

Cerium (A=140) 79

Cerium ( A= 141) 97

Cerium (A=142) 101

Praseodymium ( A= 141) 107

Neodymium (Natural) 165

Neodymium ( A= 142 ) 179

Neodymium (A=143) 199

Neodymium (A=144) 203

Neodymium (A=145) 211

Neodymium (A=146) 217

Neodymium ( A= 148 ) 225

Neodymium ( A= 150 ) 233

Samarium (Natural) 245

Samarium (A=144) 255

Samarium (A=148) 271

Samarium (A=149) 281

Samarium (A=150) 285

Samarium ( A= 152 ) 293

Samarium ( A= 154) 313

Europium (Natural) 331

Europium ( A= 151) 335

Europium ( A= 153) 341

i

Gadolinium (Natural) 351

Gadolinium (A=152) ... 357

Gadolinium (A=154) 363

Gadolinium ( A= 155) 369

Gadolinium (A=156) 375

Gadolinium ( A= 157 ) 385

Gadolinium (A=158) 389

Gadolinium (A=160) 393

Terbium ( A= 159) 399

Dysprosium (Natural) 431

Dysprosium (A=162) 437

Dysprosium (A=163) 441

Holumium (A=165) 445

Holumium ( A= 166 ) 497

Erbium (Natural) 501

Erbium (A=166) 513

Erbium (A=167) 525

Erbium (A=168) 529

Erbium (A=170) 537

Thulium (A=169) 543

Ytterbium (Natural) 555

Ytterbium (A=173) 561

Ytterbium (A=174) 565

Ytterbium ( A= 176) 573

Lutetium (Natural) 577

Lutetium (A=175) 581

Lutetium (A=176) 591

Definitions of Abbreviations and Symbols 594

i i
•

•

.
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 matri x element between the ground state and exci ted states of a given nuclide.

The most common types of reactions included in this compilation are: (e,e'), (y,y),

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

(a,Yo)- 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 photonucl ear data-abstract sheets wi thin the fi le

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 chemi cal el ement. 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 tanni ca. 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 pertai ni 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 el ectromagneti c 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 el ectromagneti c transi ti on takes place. For example, the abstract sheet

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

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

of the 62 q u 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 63 q u> Similarly a measurement of the ground-state

neutron capture cross section in would be filed under while the correspondi ng

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
‘
LANTHANUM

Z=57

Lanthanum is not a "true" earth. The rare earths are inner

transition elements characterized by elections successively

filling the incomplete 4f orbital shell. Geochemica-lly,

lanthanum is found in nature in close association with all

the other rare earth elements. It was first separated by

C. G. Mosander in 1839; he called it after the Greek word

lanthanein meaning "to be concealed".

ELEM. SYM. A

La 139 57

REF. MO.

58 Ch 2 NVB

Ctidley, L. Katz, S. Kowalski

:an. J. Phys. k07 (1958)

Betacron

H EACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N RLY THR C THR BF3-I LPI

See 58 Ka 1 for cross sections v TABLE I THRESHOLD

Measures fhotoneutron thresholds

Reaction Measured

Q value. Mev.

Other Q value*. Mev. Method Rc/erence

La'”( 7, ni Lu;,‘ 8. SI 3:0.05 8 . SO =0.20

S.7S =0.20

9.07 ±0.19

Threshold Mass data

f Mass data

v Q- value

Sher ct aJ. (1951) Johnson and Nier (1957)

Duckworth (unpublished) Glover and Walt (1957)

: $-4 IS

4- 44 » • T 24 0 » O. 0*4

u.s. oep aptment or NATION A t_ Hun £ A U Of ~ '••OA-iO

PHOTO. >wCL2aR Data sheet 5
r ELEM. SYM.

57

NVB

E.G. Fuller, B. Petree, M.S. Weiss

Phys. Rev. U2, 55k (1958)

METHOD

Betatron; ion chamber

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABY 7-^+0 C 7-^0 BF3-I 4PI

Table L Target properties and results.

Element Form used grams Sn Sn 4.81

i i 8.55 La La 10.43 Ce Ce 4.99 Sm SmjOj 2.90 Tb Tb<0r 3.04 Ho H05O1 1.87 Er Er,Oi 5.41 Yb YbiO« 3.57 Ta Ta 8.41 Au Au 3.16 Pb Pb 8.05

S*dE* ^(7.n> HZ/A

barns Mev-b Me*

0.30 0.064 5.0 0.36 0.085 6.0 0.34 0.063 5.2 0.45 0.080 4.5 0.26 0.073 8.6 0.39 0.087 8.7

0.41 0.079 7.5 0.50 0.100 8.3 0.50 0.090 7.0 0.49 0.077 6.0 0.68 0.085 4.2 0.75 0.081 3.8

“ th; ma:umum Y»Jue and "I"’ the full width at t*(y n)/7 ro7°"

productl°n c

Ios* aectioa corrected for multiple neutron em

a n

°^ *uh resonance lines to determine these valu neu tron^7hove (“f “ilK*011 M<UOnJ corre««1 loT »<*«

IS TT"1

' * 1

_ a -

•0 -

*

.

* -

s

ft* • •

•

-

• “

c -

oJ — 1

,

'

•20 •*» ao Ad MASS NUMSCM 53 “ ti

o

< «

IC' ^ean energy and width of giant resonances. “Ed" 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.

form NBS-418

(REV. 7-14-64) USC OMM-OC 2S010-P64 PHOTONUCLEAR DATA SHEET 6

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
L. Katz, G.3. Chidley

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

USSR: 1958 ) 371

La 139 57

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

reaction RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE MANGE TYPE RANGE

G,XN ABX 9-22 C 9-22 BF3-I LPI

IIopotu ucnycKiHUA ipomoneiXmyvHAt

T j o .1 a 5 1 2 I

ilao-rcu Bm. Mm Bm. Hao-roa Bu. Mm B m . XV« 11.16 20.5 LU8 8.81 16.1 Mn» 10.14 19.2 priu 9.46 17.6 Co4* 10.44 IS,

6

Tb14» 8.16 14.8 As'4 10.24 1S.1 Ho144 8.10 14,6 YbO 11.82 20.7 8.00 14.7 NbM 8,86 17.1 7.77 14.2 Rh»M 9.45 16.8 TaiSi 7.66 13.8 jm 9.14 16.2 Au1 *7 * 0 13.3 C

S

1^ 9.11 16,5 3ia» . t': 14.5

THRESHOLDS

se npiiDc.iciiu, nocKO.ifaKy ohm npcuumaiOT 22 Mm do dccx c.iyHaax, itpoMe

DOJiOTa, KOToporo 5^ = 21 Mm. CcoiicTua ccnennii cc(t} cacjcHh:- s Tao.i.__&

T a 0 a a 5 a 1

WJ-io

| HaoToa *MaHO' >tm * (Sj). Oaptt T. Mm i". Mm • 6apn T(22).

10* xcflmpox/luO p MOJL*

iU •

6 -

yu 18,4 0.062 SJ 0.33 1.62

5 - Mn4* 20.2 0.060 7.0 0.39 2.01 - Co4* 18,3 0.068 6.3 0,44 2.30 As* 16/ 0.090 9.5 0.74 4.25 l • Y«» 17.1 0,172 5.2 0.93 5.33 Nb» 18.0 0,156 7.5 1.17 6.S0 ir Rh1M 17.5 0.160 9.4 1.40 8.28 jm 15.2 0,273 6.8 1.76 11.9

310 - Cs'M 16.5 0,238 7.7 1.59 10.7 La is# 15,5 0.325 3.8 1.55 11,2 m.

prui 15,0 0,320 4.9 1.93 13.1 Tb14* 15.6 0,274 9.8 2,49 16.1 Ho1 ** 13.5 0.305 . 8.9 2,52 18.7 WO • Tm>»» 16.4 0.250 8.4 1.91 14.9 Lu17* 16.0 0.225 8.4 1.90 23.0 ) Ta1 *4 14,5 0.3S0 8.5 3,15 22.0 3 Au‘W 13,8 0.475 4.7 3,04 22,6 Bi*» 13.2 0.455 5.9 2,89 23.2

l a

Pnc. 10.

»c<t) ;um La

= M N 3 S- 4 J 8

* ' 7*1 4-641

•• •-* r ..*#01 A.**# A ’ PHCTCNUCLSAR DATA SHEET 7

U.S. department of commerce

NATION**. IVJMIAU of itanoahos
Ref. B.M. Spicer, H.H. Thies, J.E. Baglin, F.R. Allum

Australian J. Phys. 11, 298 (1958)

Elem. Sym.

La

ft.ef. No. 58 Sp 1

139 57

Method ]_8 Mev electron synchrotron; neutron counters, 25 r Victoreen

monitor EH

Reaction E or AE S*

dE J n Notes

La(y, n) Bremss.

8-18

Fig. 4.—Cross section for auoiear tfaaorytioo of y-nyi in ijMimimi Cum I is tbs crass sactioa csimiintart from tbs ! neutron yield cum. Cum II is. earrsetsd for tbs effects at

multipiieity. j porm NBS-418

(8-1-S3) USCOMM-DC 1SSS8-P83

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 8
t j • Ha ipern Muirhead , a no £ • *

«

v. m_3, 1302-12 (I960, La 139 57

*•' £ T HOC

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPl RANGE TYPE RANGE

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 ccntcr-of-mass system in Mev.

KntclHMI N<*. runs Present results Other results Method Reference

Lau*(7,»)Lau* 4 8.775±0.025 8.73 ±0.19 mass data p

8.81 ±0.05 threshold f

, Wi H. JoW». J,M and A. O. Nter. Ptiys. »*v 103. 1014 <1957).

jv NBS-41*

T- I Am 54 I •4^-r.r ?•

U.S. OCPARTMENTOF COMMERCE

NATIONAL. SUBCAUO * PH0T0NUCLEAR DATA SHEET 9
1 T. ?. akp t , K.G. McNeill

Can. J. Phys. 1158(1961)

method betatron; fast neutrxm yield; angular distribution;

threshold detectors; ion chamber

La 139 57

A1 and S i REF. NO. 61 Ba 2 NV3

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RAN CC TYPE RANGE *

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

G,XN ABY THR-22 C 22 THR-I 5-4- DST

la Tables 2 and k:

<j = average cross section of detector

weighted with neutron spectrum

* "3-+" is

Aluminum

the detector range of

and "5-+" of Silicon.

| = neutrons/100 roentgen/mole

CC W(0) = aQ ^ [1 + A

ft Pn

(cos 0)j

n=l

TABLE II Normalized yields for aluminum detectors

Element

Al(a.y) reaction Al(*,£) reactions

20 150* a, 30* 60* 90* at *» at (ff*)*X10s

Bismuth

ixad Tantalum LatUhanum

Arsenic Copper

426

37S

203

77

IS

i:»7=130 620

4234:130 641 3124:220 725

3074:190 GSS

2224:110 330 100=50 103 65 =30 70

5414:85 3632

4844:85 2562 4294:77 3123- 4414:122 2757

2434:70 2139

974=32 788 554:20 710

5139=290 3168 5353=290 2955

5754 =200 3154

3024 =425 2088 3371=250' 1891 937=115 764 748=70 569

4300=185

4144=185

4591=106

2757 =275

2768=160

805=74

700=45

0.06=0.06

-0.05=0.06

-0.004=0.05

0.14=0.14

0.05=0.07

0.02=0.11

0.11=0.08

-0.35=0.1

-0.53=0.1

-0.51=0.07

-0.19=0.17

-0.43=0.10

-0.16=0.14

-0.14=0.11

17.70

16.87

18.6S 11.22

11.27 3.52

2.85

•<#) - 4.07 X . •''at muUba. n-neuaon. TABLE IV

T II m IV V VI VII Element a« («>)X10** +*mi(22Mcv)X10»

Vanadium 245 (14:0.00) 0 01=0.08 -0.00=0.10 6.05 0.21 0.12

Chromi_.it 104 (14:0.03) 0.04=0.04 -0.05=0.05 4.05 0.17 0.10 Manganese 308(14:0.02) 0.07=0.03 -0.09=0.04 7.61 0.25 0.12

Iron 200(14:0.03) 0.05=0.04 -0.17=0.05 4.94 0.18 0.11 Cobalt 390(14:0.02) 0.08=0.03 -0.22=0.04 9.63 0.20 0.15

Nickel 145(14:0.05) 0.07=0.07 -0.23=0.09 3.58 0.12 0.12 Copper 347 (1 ±0.02) 0.05=0.03 -0.29=0.04 8.57 0.30 0.12

Arsenic 482 (14:0.03) 0. 1; ±0.04 -0.24=0.05 11.91 0.33 0.15 Rubidium 638 (14:0.05) 0,13=0.00 -0.14=0.08 15.76 Strontium 409(14:0.05) 0. 10=0.00 -0.17=0.08 10.10 Yttrium 290(1 ±0.10) 0.08=0.12 -0.12=0.15 7.16

Silver 590

1

(14:0.04) 0:10=0.00 -0.22=0.08 14.57 0.87 0.07 Cadmium 905i(14:0.02) 0,02=0.02 -0.26=0.03 22.35

Iodine 11331(14:0.03) 0.04=0.04 -0.29=0.05 27.99 1.42 O.OS Barium 10481(14:0.04) 0.10=0.06 -0.38=0.08 25.89 Lanthanum 15951 14:0.02) 0.02=0.03 -0.42=0.04 39.40 1.04 0.15 Cerium 13161(1=0.05) 0.05=0.00 -0.39=0.08 32.50 Dysprosium 1652 ( 14:0. OS) 0.04=0.10 -0.34=0.13 40.80 Tantalum 1558<; i ±0.02) 0.04=0.03 -0.22=0.04 38.48 2.50 0.06 Tungsten 1365 ( 14:0.02) -0.07=0.03 -0.24=0.04 33.71 Mercury 1345 < 1445.02) 0.04=0.03 -0.31=0.04 33.22 Lead 2274 ( 14:0.01) 0.02=0.02 -0.42=0.03 50.17 2.72 O.OS Bismuth 2162 14:0.02) 0.06=0.03 -0.45=0.04 53.40 3.36 0.00 Thorium 3031 14:0.04) 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

•(#«) — 1.47 X 10* «« mflUbfa utiw. Emm an Kantian! am due to counting statistics only. form N8V413 ' iRCV. 7-14-aat USCONM.OC M0I0-PU4 PHOTONUCLEAR DATA SHEET 10

UJ. DEPARTMENT CF CC NATIONAL BUREAU OF STi see
REF. J. Miller, C. Schunl, C. Tzara

J. Phys. Radium 22, 529 (1961)

EL EM. SYM. A

La 139

METHOO

Positron annihilation; neutron cross section; BF^counter; ion chamber

REF. NO.

61 Mi 1

57

NVB

REACTION result excitation

ENERGY

SOURCE DETECTOR

ANGLE

TYPE, RANGE TYPE RANGE

G.XN ABX 10-22 D 10-22 BF3-I API

cr

FORM HBV418

Olv, 7*1 4-44) USCOMM.QC 2«010-P«4 PHOTONUCLEAR DATA SHEET il

u.s. department of commerce

NATIONAL. BUREAU OF STANDARDS
USCOMM-OC le<15«-P«3 PHOTONUCLEAR DATA SHEET 12
Ret. G.C. Reinhardt, r*.D. Whitehead

Nuclear Phys. !)G » 201 ( 1962 )

Elem. Sym.

La

'.

; o;tiou -- sIey betatron; synchrotron; Si~^(n, p) Al^ activity; Cu^3 ( 7, n)Cu^^

139 57

monitor

.

Ref. No.62 Re 1 EGF

E or A E crdE J

ti Notes

(7, n) Brenss.

55

Figure 10 : Dotted curve is of form

2 2

a + a, cos0 + a^cos d + a_cos 0 - 0 1 d d

2

a,cos~3; solid curve is of form a +

1 o

0

accost? + a

Q cos 6 ; errors on points

are statistical error in counting

only.

U.S. department of commerce

NATIONAL BUR'-tAU OF ST AN O A R 03 FORM NBS-418(B- 1 -S 3 I USCOmm-OC IBSSS'PO PHOTONUCLEAR DATA SHEET 13
L.B. Rice, L.N. Bolen, W.D. Whitehead

Phys. Rev. L34 . B557 (1964)

EL EM. SYM. , A

La 139 57

METHOD

Synchrotron, NBS chamber

REF. NO.

64 Ri L NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 8-30 C 8-30 BF3-I 4PI

Fig. 1. T-ant.ha.num (y,n) cross section uncorrected

for neutron multiplicity.

Fig. 3. Lanthanum (v,n) cross section with neutron multiplicity correction (solid line) ; Lorenta line fitting to data points (dashed

line).

Table I. Experimentally determined parameters for the neutron

photoproduction cross sections am, maximum value of cross

sections; £», energy at which maximum occurs; DSR, classical dipole-sum rule limit ; To twice the energy from half-maximum on

low-energy side of curve to Em, T tor width used to fit the Lorenta

curve

<Tm mb

Em MeV

adE

Jts, DSR

MeV-b MeV-b

To MeV

TLor MeV

Uncorrected for multiplicity La 3154:15 14.8±0.4 1.76 2.02

Pr 3054:10 14.84:0.4 1.74 2.06

Corrected for (y,2n) La 304 14.5 1.36 2.02 3.24:0.2 3.3

Pr 305 14.8 1.47 2.06 4.04:0.2 3.3

form N8S-418

(REV. 7-1 4- 04) UlCOMMOC 2«010-P«4 PHQTONUCLEAR DATA SHEET 14

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
,er - G. Ben-David, B. Arad. J. Baiderman, and Y. Schlesinger

Phys. Rev. 146 . B852 ( 1966)

ELEM. SYM.

La 139

method

Nuclear Resonance Scattering using N,G reactions.

REF. NO.

66 Be 3 JDM

RESULT EXCITATION ENERGY

SOURCE OETECTOR

REACTION TYPE RANGE TYPE RANGE

ANGLE

G,G RLX ITS 1 O D 5-10 NAI-D 5

- LO 135

j a. 1 n FI r

n H a s n|||

nnBnn fla Mm Nik*) *1 Si P

a j i] i4 a

S Cl K C* Ti V CfMnPtCoNCaZfiSaOr T Zr Mo iq Cd Sn Sb T4 I BoloCaPrNdSnGdOTHoErrbHITogPIAortjnPbaniU

* n naaaawaazTgaaMM»a«o«<7 taisasi » 33 s* 57 58 59 M*2*4«4W68?or2rj747*7S8o nazjsj » «

>z aa

I N 14 14

30 s a

a

a

• «

IT« a

M 34 54 XXX

STa

a

*060 HKS

a

(4*4 U U

M M

n

a

71 71 71

80 80

ii a Es&ezazoaz)

84

86 V

98 98 a

DO 00

KM 02 0202

atu

ISso

121 22 82 122 24 04 24 20900X0 40 40 *7 o 09 a

22 22 41 « (4 (9 84 84 04 04 ESCB

23 4| 49 89 09

24 24 44 44 70 70 70 88 88 040* 0* 42 ><2 29 44 46 71 17 07 43

21 79 44 72 72 72 « 88 98 O8 O8 C0 44

27 27 SIWIM 73 90 90 90 09 aasGsea a SI 74 31 34 a in a a S2 1% 92 92 92 2 "2 »»» S3 71 93 14 a 54 94 94 94 K

99 99 17

94 94 94 96 18 *8

94 97 20

no. 3. Histogram of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemical lymbof followed by the neutron number! of the naturally occurring isotopes. Magic numbers are shown in brackets.

i aolx in. ljsi or enective cross sections.

OOO- i—i—

r

for ana

fhan «Trr >

ig. 5. Integral distribution of the effective cross sections the 1 1 resonances .o the mono-isotopic elements Lanthanum

praseodymium.

rw M8V4lt

!«• * V >.l «.*«

i|«f- '••l-oc 74r

Seatterer Energy (MeV)

Gamma

•ource

4 (mb) Seatterer Energy (MeV)

Gamma

•ource

4 (mb)

Sm'4» 8.997 Ml 100 Sn 7.01 Cu 110 ?r«* 8.881 Cr 9 Nd 6.867 Co 30 La 9. 332 Mi 6 Pr*4* 6.867 Co j Te S.532 Mi J* Te 6.7 Ni Cu 3.409 Cr 24 La 12 Zr 8.406 Se 3050 Cd 6.174 Co 110

7.x\. 8.1 19 Mi 13 Mo 6.44 Hg 25«

Sc 7.817 Mi 50 La 6.413 Ti 72 Sc 7.76 K 90 Mo 6.413 Ti 10 Sb 7.67 V . . .to Tl 6.413 Ti 25 Cd 7.64 Fe 40* w ^6.3 Ti . . b Ni 7.64 Fe 7« Sb 6.31 Hg

Pr'«* 7.64 Fe 12« Ti 6_n Hg 2* Tl 7.64 Fe 370* Sn 6.27 75 La 7.6 J4 Cu 7 Pb** 6. IS Gd Mo 7.6J4 Cu 11 Te 5.8 Ni . . .1 H i* 7.6H Cu 4 La 6.12 Cl 35 Te 7.528 Ni 66< Pr«i 6.12 Cl 110

&i m 7.416 Sc 100 Pt 5.99 40*-

3i»* 7.300 A J 80* Tl 5.99 Hg ?b»* 7.285 Fe 4100 Pb** 5.9 . . . A Cl 7.283 Fe 34 Ce 5.646 Co 17 ?r

i«i 7 183 Se 80 Bi* 5.646 Co 55 Tl 7.16 Cu 120 Pb*** 5.53 70 La 7.13 Mq so Hg 5.44 Hg 75«

Bi*» 7.149 Ti 2000 Hg 4.903 Co 385

- rompontm 01 a complex spectrum. •A broad scattered spectrum with no observable peak structure. •There are actually two lines ol energies 7.647 and 7.633 MeV havine equal .ntensities to 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.

rays'on^'nT**

5 *' *® ' n<^ et,en'**nt t^Yel^in the complex spectrum of Mi y

• Rougn estimate.

1 Msy be inelastic component from 7.32* level in Te.

co"wrM'kfrs.

l*tl're U"* * this case are dae to Groaber and

‘ No line (s known for tie source at this energy.

Difficult to resolve among Um many source Unas present at this energy. PH0T0NUCLEAR DATA SHL*. 15
Table 1 F' 8' Cross seetion < in mb) versus mass number of the target for gamma-ray energies of 9.00, Photoneutron cros"s sections (mb)

9' ?2 ““ 10' 83 McV' Th* S°‘id ^ P‘ 0tS °f eq' (I) in the teXt‘

Target

“Co

TSAs “Nb

1M Rh

l07Ag 1 1MAg | u,In

1J1 Sb I >“Sb | 137

J 1MCs “•La

to Pr

1,1 Eu 1 14S Eu j 1,4 Ho

l,lTa

‘"Au

*“Pb

•»»Pb «*Bi

7.72 MeV 9.00 MeV 9.72 MeV

0.53 ± 0.10

'

8.61 ± 0.86

28.9 ± 3.2

35.6 ± 4.3 4.14±0.36 45.4 ± 3.7 44.5 ± 3.6 <34.3

22.6 ±11.3

36.1 ±12.0

1 4.6 ± 2.2

1 0.6 = 1.7 10.0± 1.5

17.1 ± 2.6

20.7 ± 3.1

38. 7± 5.8

3 1 .7 ± 4.8 40.8 ± 6.5

21. 5± 3.2

61.3 ± 14.7 92.2±27.6

65.0 ± 5.5 68.4±13.5

10.83 MeV

9. 0^; 0.8 20.4 x 1.7 25.8 x 2.1 38.8 ± 3.1 37.6± 2.9

33.3 ± 2.7

42.5 ± 3.6

38. 8± 3.1 52.5 ± 3.8 63. Ox 5.0 58.3 ± 4.1

102 ±18

150 ±20

146 x 12 160 ±15

238 ±29

280 ±31

226 ±27

16

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. R. 3ergere, H. BeiL and A. Veyssiere

Nuc 1 . Phys. A121 . 463 C 1-963)

ELEM. SYM. A

La 139 57

METHOD REF. NO. 63 Be 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE range TYPE RANGE

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

G,2N ABX THR-30

G,3N ABX THR-30

4 <r mb

FORM NBS-418

(REV. 7.I4.M) U1COMM.CC 26010-P44 rnw 1 unuv.u car wa i a once ! 17

TMENT OF COMMERCE

IREAUOr STANDARDS
J. W. Jury, J r S. Hewitt, and K. G. McNeill

Can. J. Phys._4§, 1823 (1968)

ELEM. SYM.

La 139 57

METHOD REF. NO.

68 Ju 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE

G,N NOX THR- 27 C 27 THR 5- DST

W(0) - a

o + + a

2

P

2

TABLE I

Target element Z Energy Oo* a Zi ao Vanadium 23 32 640 ±50 0 . ; ! + 0 . 10 -0.09-0. 1

1

Chromium “t 4 365-1- 39 0.02 + 0.08 0 00 - 0 . 10 Manganese 25 450-33 0.07 + 0.05 - 0 . 1 1-0.06

Bromine 35 27 874-54 0.05-0.06 -0.15-0.08

Molvbdenum 42 22 610-60 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 1940 ±70 0.12 + 0.10 -0.52-0. 14 Praseodymium 59 30 1800+58 0.20 + 0.08 —0. 40 ± 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 r 0.09

•The yield per mole per 100 r was normalized to a yield of 2274 for the lead sample at the same energy.

form NBS-418

| (REV. 7-1 4-04)

j use OMM-OC 2S010-P44 PHOTONUCLEAR DATA SHEET 18

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARDS
R. B. Begzhanov and S. M. Ak.hr arov ZhETF Pis. Red. 10, 39 (1969)

JETP Letters _L0, 26 (1969)

=.i_ wM. n ' VI.

La 139 57

METHOO REF. NO.

69 Be 7 hmg

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 6.0 D 6.0 D DST

(6.413) (6.413) (90,135)

Self- Absorption. 6.413 MEV

Result* of determination of the resonance-level parameters

SourceMv <*y.0 rY0

» o, Reference

scatterer MeV mb eV keV

P1> - Zs M 7.13 31*4.5 0-55*0.12 51.70J0.13 This work

r. - Mo 96 5.413 11.2 *1.4 0.1 1 *0.02 8.68* 1.57 ft r« - La 139 5.413 16 044.10 0.29*0.05 8.01* 1.42 If r. * Bi 209 7.1? 1200*230 0.32*0,07 1.34* 0,40 If 6.996 1550 - — (11

- c„*s

7, IS 2600*300 0.42*0.14 — t*l u 6.07 423 *109 0.34*0.06 99.1*17.4 This work

- Ca63

6.07 440*130 0.36*0.07 (51 Ti 5.07 215* 71 0.18*0.04 S7. 14*12 Til This work

6.07 200* 50 0.16*0.01 — (61

- C.«

9.50 22 * 7 046*0.03 110*40 This work

Cf 3.499 3S 75 (11

l 5.50 19 *6 048*0.09 (51

- C.65

8.S0 36 *9 0.47*0.10 21.36*4.54 This work

Ci 3.-',99 80 10.5 (11

3. SO 42 *13 0.94*0 4 9 [6]

, S.H7

7.01 1150*240 0.15*0.04 0.44 *0.32 This work

Cs 7.01 1000 - — (11

- Mo*

7.01 1200 *400 04 *0.3 — (51 6.44 201 *37 0.12*0.04 043 *3.07 This work

porm NBS-418

'R CV. ?-1 4-54) USCCMM.OC 26010.P54 PHOTONUCLEAR DATA SHEET 19

U.S. DEPARTMENT OP COMMERCE

NATIONAL 9URSAUOP STANOAROS
REF.

K. Shoda, M. Sugawara, T. Saito & H. Miyase

PICNS-69 Proceedings of the Conference on Nuclear Isospin.

Asilomar-Pacif ic Grove, California 1969 (Academic Press,

New York & London 1969) p. 137.

EL EM. S YM.

La 139 57

METHOD REF. NO.

69 Sh 8 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E.P SPC 11-22 D 30 MAG-D UKN

UKN=UKNOWN

Nv

N.

* *

,

• Ld

1 \\ E,= 30MeV

I V,

. \V.' !*, *

6 8 10 12 14 16 A . * '.C r Ce

* “V^v -,‘W E» = 22MeV ’ i

4 4

•

.

6 8 10 12 14 15

• r .i

ii • 1 V «r ^r *\K.' ' -* =20MeV ' ... • <4

'v'«

6 8 10 12 14 16

V.

’’Sm

t E- = 20MeV

•

1 <*#k.

* *• «- .#••• »

8 1C 12 E r (MpV)

14 16

Fig. 1. Energy distnbut ions of photoprotons.

Vertical broken lines and solid lines

indicate the position of p Q corres- ponding to the ground IAS and electric

dipole IAS (2).

FORM N3S-418

(R EV. 7-1 4-641 USCOMM-OC 26 010- P6 4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 23
BEF - R. Moreh, S. Shlorao, and A. Wolf

Phys. Rev. C2, 1144 (1970)

vir T HOO 1 REF - NO.

ELEM. SVM.

La 139 57

70 Mo 2 hmg

EXCI TA T ION SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE

ANGLE

G,G ABX — o D 6 SCD-D DST

( 6.018) (6.013)

v - 6.018, LFT

TABLE HI. Summary of the results of spins, parities, and total widths of resonance levels excited by y rays obtained from neutron capture In iron. Parities in paraatheses are uncertain.

Isotope Energy

(MeV)

«-|£,-£,|

(eV) Transition ra /rr (=3%)

r r (10-3 eV)

*Cr 3.333 18 *1 0* 1

• • • 0.90 750 ±200

«Si 7.646 14 ±1 0* 1- £1 0.64 480 ± 50

’ 4 Ge 6.013 4. 5*0.

5

0* i" £1 0.19 120 ± 15 RAa 7.646 7.4 ±0.3 3/2“ l/2« *> ... 0.11 360 ± 100

151 A« 7.632 9 ±1 1/2- 3/2 ... 0.7 2 x 1 U2Cd 7.632 4. 3±0.4 0* 1- £1 0.55 86 ± 15

: '-*La 6.013 8.2 ±0.6 7/2* 7/2" £1 0.50 511;4 uipr 7.632 11.4:$:

5/2* 5/2* Ml 0.46 72*?*

:osTl 7.646 9.3± 0.3 1/2* 1/2 ... 0.58 990 ± 90

20lpb 7.279 7.1 ±0.3 0* 1* Ml 1.00 780 ± 60

TABLE IV. Effective elastic scattering cross section

(ur )“(ry (Tj/Ty ) + (*0 ,/p), where 4, J, r } , 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)

i°r) (mb) MCr 3.383 905

<:N1 7.646 569

;4 Ge 6.013 61

75 AS 7.646 4.4

,0»A* 7.632 •• 3.5 “s Cd 7.632 193

:2, La 6.018 39

141 Pr 7.632 20 jmti 7.646 574

:o» pb 7.279 5560

'OKU NBS-418 (REV. 7-1 «.«4> jicouv-oc ieoio-p<« PHQTOMUCLEAR DATA SHEET 21

J.S. DEPARTMENT OF COMMERCE

NATIONAL euREAUOF STANDAROS
R. Moreh and A. Nof

Phys. Rev, C2, 1938 (1970)

| EL EM. SYM. ! A

La i 139 57

METHOD

[Page

REE. NO.

1 of 2] | 70 Mo 3 brag

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE range TYPE range G,G LFT 6 D 6 NAI-D 0-8 DST

(6.018,6.418) (6.018,6.418)

. - J-Pl: 6,018. 6. £18

SCATTERING ANGLE (dtg)

FIG. 4. Angular distribution of some intense y lines scattered by 1J,La using a y source obtained from the Fefn.y)

reaction; a 20-cc Ge(U) detector was used. The solid lines have the form = 1 AP2(cosfl) and are least-squares

fils to tbs experimental distributions. In each case the corresponding y-y cascade Is indicated.

The values of the parameters which best fitted

ail experiments were

6018 keV: r 7 = 0.0511££ eV,

(v,) * 39 mb

,

6418 keV: r7 =*0.0811<j£“ eV,

(<0= 142 mb,

iyrr =o.5,

6 = 8.2 ±0.8 eV;

iyr7 = o.78,

5*9.5±0.5 eV.

The values of (<jt) are at a y-source temperature

of 380"C and a target temperature of 25°C.

[over]

porm NBS-418

(R EV. 7-1 A- 04) USC OMM-OC 26010-P04 PH0T0NUCLEAR DATA SHEET 72

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST ANOAROS
7632

7/2

in'

7/2

i r~i i i i r

<0 O - »/> N O f' «<Nr* O ^o* O « Nn ui VA«/I

I M7 O V/* «At/tO tf9 t/1 vS* vS» W> «S» « »ooo — — — -

i i i i i ! rr i i i •O* Ot® o - >4 « NOI W

*» ^ 'Of* ® «tJ» o ^ ^ •« -4 W >« •« W >4 ^ |/3 u

Y2.JY2

3/7

7/2 T2.HV7I

7/2

V7.IV2)

V2

17

*

It

"

185555*2

—

-H-

’»lo OCCAV SCHEME

7279

— 8760

641*

601*

2232

2123 2C6I

1956

1919

. 1839 '820

• '7se

1714

1684 1580

1536

<480

1419 1384

1257

1220

t t

166

HO. 3. Decay scheme of five resonance levels of ls, La showing branching ratios for only two strongly excited resonances where most of the Ineiastically scattered lines are believed to have been detected. 3pm and parities for some levels assigned In the present work, are given. Parentheses and broken lines Indicate uncertainties.

23
REF. R* Moreh and A, Nof

Phys. Rev. C2, L938 (1970)

ELEM. SYM,

mc THOD

TABLE V. Most probnble spins and parities of levels

In n,Ln as found In the present work. Also listed are the corresponding y-llne energies, the experimental angulardistribution coefficients A, and the Af2/£1 mixing amplitudes x . The values of x arc given for more than one

possible spin value. The 1580-keV level was populated

by more than one

certainties.

resonance. Parentheses Indicate unLevel energy

(IceV)

Spin and

parity

y-llne energy

(keV) A + A A

X (M2/£l) a

6760 ;<-> 6594 —0.15± 0.04 -0.013*0.056

6418 9 - T 6418 0.093 ±0.004 -0.001*0.004

6013 4" 6018 0.17*0.02 -0.01 ±0.03

166 5 + 7

5852 -0.16*0.04 -0.02 ±0.06

1220 5"T 4798 -0.15*0.08 -0.03 ±0.08

1220 (f) 4798 -0.15*0.08 0.15 ±0.10

1384 y

5034 0.04*0.10 0.10 ±0.18

1419 i 4999 0.06*0.06 0.06 *0.12

1419 (4-) 4999 0.06*0.06 0.02 ±0.14

1536 f

4882 0.11*0.04 -0.03 ±0.08

1580 7

4838 -0.11*0.04 -0.09

1580 9. 4438 -0.07*0.09 0.005*0.115

1580 S* 5180 -0.09*0.11 0.03 ±0.18

15S0 if) 5180 -0.09*0.11 0.07 ±0.14

2232 i

4186 0.06*0.10 0.07 ±0.18

2232 4186 0.06*0.10 0.01 ±0.23

‘Here it was tacitly assumed that all transitions are predominantly £1.

FIG. 5. Angular distributions of some intense y lines scattered by 13, La using ay

source obtained from the Tl-

(n,y) reaction. See caption

to Fig. 4.

foam N8S-418

(REV. 7-t A.S4I USCOMM-OC 2fl 0 t 0* B6 4

.

| A

I La ! 139 57

[Page 2 of 2]

70 Mo 3 hrag

SOURCE OETECTOR

TYPE RANGE

1.40

1.20

1.00

S/2

[ 6Ut

f!V2i,7/2-j *-| 3#4 7/2*L o

502* k*V Una

w«. !<.()* i.!oi Fya 90 110 1» ISO 170 SCATTERING ANGLE (deg)

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS

PHOTQNUCLEAR DATA SHEET 24
SEP. H. Szichraan, Y. Schlesinger, G. Ben-David, D. Pavel

Nucl. Phys. AU3 . 369 (1970)

La 139 57

MFTHCO RE F . NO.

j 70 Sz 1 egf

REACTION RESULT EXCITATION energy

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G • G LFT 6-9 D 6-9 - SC.P.-D L-9 DST

6 LEVELS

Abstract: Nuclear resonant scattering of photons from several (n ,y) reactions was used to study

bound nuclear levels in the 6-9 MeV region in 13 *La. The results obtained in the dc-excitation of six resonant levels at energies 61 13, 6418, 6760, 7637, 8527 and 8382 keV are presented. From

the angular distribution of the eiastically scattered photons, a spin of | was deduced for the 6115 and 6418 keV levels. On the basis of the angular distribution of the inclastically scattered photons the following spin assignments were made for four of the low-lying levels: 121 9( | ). 1421(i or V). 1687(f) and 1770(f). Hitherto unknown levels were found at 1894 and 2159 keV.

Total radiation widths were measured and found to be 79x17 rrveV for the 6115keV resonant

level, 45 x9 meV for the 6418 keV level and > 60 meV for the 6760 keV level. NUCLEAR REACTIONS { ”L*(y,y'), E =* 6115, 6418. 6760, 7637, 8527 and 8582 E : keV; measured £r

, a(E"y ,0). 1 J, La deduced levels, J, total and partial radiation widths. Natural target. Ce(Li) detector.

Fig. 3. Decay scheme for the observed resonant levels of l,,La.

foim NBS-418

:R6V. 7-14- 641 JSCOUU.OC 24010-064 PH0T0NUCLEAR DATA SHEET 25

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANCARDS
REF.

H. Beil, R. Bergere, P. Carlos, A. Lepretre, A. Veyssiere and

A. Parlag

Nucl. Fhys. A172, 426 (1971)

ELEM. SYM.

La

A

139

Z

57

METHOD REF. NO.

71 Be 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.SN JfaST ABX 8-18 D 8-18 MOD1

4 PI

3i>6 +

Table 1 Lorentz line parameters corresponding to fits of total photoneutron cross sections presented sn

fi*. I

s*Ba 1 5*1-* s.Ce jAipr soNd ‘JiPr*)

'

<3 1 (mb) 356 ±15 340 ±15 360 ±15 350 ±15 315 ±15 320 ±20

(MeV) 15.3 ± 0.1 15.2 ± 0.1 15.0 ± 0.10 15.1 ± 0.1 14.9 ± 0.1 I5.16± 0.08 A (MeV) 4.70± 0.15 4.45 ± 0.05 4.35— 0.05 4.26- 0.05 4.90 ± 0.05 4.49 ±0.05

i-’itr,/’, (MeV • b)

2.6 ± 0.15 2.35 ± 0.13 2.42 ± 0.15 2.35 — 0.13 2.43 ± 0.13 2.42 ± 0.17

ina,r,

i m ns 1 . 1 6 ± 0.08 1.19- 0.08 1.14— 0.08 1.15± 0.08 Q.Q6NZA-

*) Lorentz line parameters given in ref. 10

) for ,4, Pr.

10

R.L. Bramblett, J.T. Caldwell, B, L. Berman, R. R. Harvey and

S. C. Fultz, Fhys. Rev. 148 , 1198 (1966).

PHOTOnuCLEAR CROSS-SECTIOn

Fig. 1. Total photoncutron cross sections for Ba, l3 ’La, Ce, l4, Pr and Nd as a function of

incident photon energy E. 26

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
REP. T. Methasiri and S. A. E. Johansson

Nucl. Phys. A167 . 97 (1971)

EL EM. S y M. I A

MCThOO

I 2

•

j

i La ! 139

I i 4- L !_

REP. NO.

57

71 Me 1 egf

REACTION RESUL T excitation SOURCE oetector

ENERGY type range type range angle

G > F A3Y THR-900 C 300-900 FRG-I 4PI

Fig. 2. Nuclear fissilities as a function of Z

1/A.

Table 1 The constant fission cross sections above the threshold

Element <rf (cm 1 ) Element a, (cm 1

)

Pb (5.0±0.2)x JO" 17 La (1.1 ±0.1) x 10" 1 * Au (1.7— 0.1) x 10* 1T Sn (4.3±1.1) x 10" 1 * Ta (3.3 ±0.2) x 10“* • Ag (8.4±2.0)xl0-**

Yb (1.2±0.2) x 10 -11 Mo (1.7±0.4) x 10 -1 * Ho (5.5±0.3)x;0‘ 1 » Cu ^^l^xlO" 18 Gd 1 •

n o 00 X o Ni (5.8±0.1) x 10" 1 * Nd (1.3±0.2)xl0* 1 *

over j porm NBS-418

|R!V. ?•! A- 54) USCOMM.OC 2 6 0 t 0- P6 4 PH0t0NUCLEaR data sheet 27

U.S. OEPARTMENTOF COMMERCE

NATIONAL. 3UREAUOP STAN3AROS
<g) (h)

(i) G)

<k> (1 )

Fig. 1. Cros_s sections per equivalent

quantum d (E) as a function of log E.

23
R. Pitchan and Th. Walcher

Phys. Letters 36B , 563 (1971)

EL EM. SYM. , A

La 139

METHOD j REF. NO.

71 Pi 1

REACTION

E,E/

RESUL T

SPC

xcitation

ENERGY

4-18

SOURCE

50,65

DETECTOR

MAG-D DST

Count 1

u Couf75

E„. 65M*v 3.129®

70 65

ao | 75

70

Co

St,•%V . ,f°

75

70

! & sfe* « ’ V

I —

a o 12 u, 16 « »E, £h«v]

Fig. 2. Spectra of electron* scattered tnelaalicaJly from La, Ce and Pr targets at the same primary en- ergy and the same laboratory scattering angle. No

background has been subtracted Note the suppressed

zeros of the ordinate scales.

podu N 3 S-418

in e v . 7.1 a-oai IJJC OMM.DC 20010* Pfl 4 photonuclear DATA SHEET 29

U.S. DEP ARTMENT OF C NATIONAL. BUREAU OF ST
REF. ; EL EM. SVM. A Z T.K. Nucl.

METHOD

Deague and R. J. J. Stewart

Phys. A191, 305 (1972) La 139

REF. NO.

57

7 2 De 3 egf

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 9-24 G 8-24 BF3-I 4 PI

<8,2.0 559

Entrgy (M«V)

Table I The integrated l30

La(;', .vn) ami '*'Pr(‘\ ,vn) cross sections and their minus-first and minus-second moments, compared with the appropriate sum rules

Energy (M«V)

Fig. I. (a) The i10 Lj(;\ ah) cross section, obtained by VHl’L unfolding from yield data measured

in 0.1 MeV steps. Also shown is the DCM dipole spectrum lor l4! Nd, and a lit to it of I.orcntz line shapes with widths 4.0 MeV (solid line), tb) Ihe ’ "*

'

t

> r(; ,

t \n) cross section, obtained by \ BPL

unfolding from y ield data measured in 0.1 MeV steps. Also shown is the IX'M dipole spectrum for '"Nd, and a fit to it of l orentz line shapes with widths 1.0 MeV (solid line).

form N3S-418

(R EV. 7-1 4-64) USCOMM-OC 26 010- P6 4 PH0T0NUCLEAR DATA SHEET 30

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
B.W. Thomas, D. M. Crawford and H. H. Thies

Nucl. Phys. A196. 89 (1972)

EL EM. SYM. , A

La

METHOP REF. NO.

.39 57

72 Th 2 egf

REACTION RESUL T excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type r an ge G.XN RLX 9-17 C 8-16 3F3-I 4 PI

po»m N3S-418

IP EV . 7-1 A- 641 use Omm. OC 2«0t0.Pe4 PHOTONUCLEAR DATA SHEET 31

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3U.9EAUOr STANOARDS
REF. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nucl. Phys. A21Q , 355 (1973)

EL EM. SYM.

La 139 57

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 4PT

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 IJ

).

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).

i-5 T.D. Newton, Can. J. Phys. 34 , 804 (1956).

Fig. 15. Ratio a,M/a, versus atomic number A. Here aOM is the level density parameter taken from

the neutron resonance work of refs. *• 3 ), 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)

U.S. DEPARTMENT OF'COMMERCE

NATIONAL BUREAU OF STANOAROS

FORM N3S-413

(REV. 7-1 A- 841 USC OMM.CC 280I0-PS4 PH0T0NUCLEAR DATA SHEET 32
Table 3 (continued)

Target JV Goodness £.(24) T ti9 <toM (residual of fit *) (MeV)*) (MeV)*) (MeV" 1 )*) (MeV" l )

r) nucleus) *) o with

P-c- p.c.

Ba 75 1% F 1.16 16.5- 134 Ba 15.39- li6 Ba 0.93 77 2%

78 7%

79 8%

80

81 71%

La 80 100% F F 1.25 0.72 l5.5- l3 *La 13.76- l3, La 0.89 Ce 81 89% F G 1.24 0.70 17.0- 13,Ce 17.8 -l *‘Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 I7.0-l *°Pr 17.05-I42 Pr 1.00 Tb ') 93 100% 1.15 19.3-15 *Tb 21.85-ls0Tb 1.14 Dy*) 93 2% 1.06 20.9- l4 ‘- 3 Dy 21.9 -162 Dy t.05 94 19%

95 25*/. 96 25%

97 28%

Ho 97 100% P G 1.06 0.56 21.4- ,4 *Ho 20.66-l64 Ho 0.97 EM) 95 2% 1.11 19.2-‘“Er 21.9 -l#6 Er 1.14 97 33%

98 23%

99 27%

101 15%

Tm •) 99 100% 1.03 24.0-“*Tm 22.58- l7(>Tm 0.94 Ta 107 100% G 1.00 0.49 26.0-' *°Ta 21.2 *‘Ta 0.S2 W 107 26% G F 0.98 0.50 27.0- l ' J W 23.0 -,,3 W 0.85

108 14%

109 31%

111 28%

Au 117 100% G 1.19 17.5- ,9*Au 20.24-' ’*Au 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 9.0-2O *Bi 13.8 -2,0 Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (•/, n) experiments.

*) These gise an assessment of the goodness of fit of a calculated £m versus EQ curse to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

*) Bremsstrahlung photoneutron mean energies £. for peak bremsstrahlung energy £<> = 24 MeV.

*) Nuclear temperature from fit with constant-temperature formula.

*) Level density parameter ap 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. U2). *) Measurements of £.(£„) for these nuclei were made only for E0 = 21, 23 and 24 MeV.

33
ref. F. R. Buskirk, H. D. Graf, R. Pitthan, H. Theissen, 0. Titze,

and Th. Walcher

PICNS-73, Vol.I, p. 703 Asilomar

ELEM. SYM.

La

A

139

z

57

METHOO REF. NO. 73 Bu 14 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

SPC 2- 20 C 50.65 MAG-D PST

The Z2 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 A~

1 ^

for the nuclei

measured at Darmstadt and the Sendai result for ^°Zr I 5 J - Bohr and

Mottelson 1 9'J predicted a collective E2 resonance i. v-uicuivjtr whoseuuo ISOSCai isoscalar

part should depend on A through E =58 A~

J‘ //^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.

PORM N3S-418

(REV. 7-1 4-64) USC0MM-N8S-0C PHOTONUCLEAR DATA SHEET 34

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
«EF. Rainer Pitthan

Z. Physik 260 , 283 (197 3)

EL EM. SYM.

La 139 57

method REF. NO. 73 Pi 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

B.E/ ASX 7- 21 D 50 MAC- D 165

Fig. 7. Spektrcn vcn unelastisch an La, Ce und Pr gestreuten EJektronen, sonst wie

Fig. 5, s. Text

*o«m Has-ail

ir e v. 7*14. «4> VJSC OMAA-N 9S*OC PHOTOHUCLEAR DATA SHEET 35

L) .S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU O ^ STANOAROS
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. SYM.

La 139 57

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 tr, at £ = 1000 MeV and deduced values of <rt assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z

l/A

(mb)

Eo (MeV) (mb)

Bi 32.96 12.3 ±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 ±03

Au 31.68 2.0 ±0.15 240 1.4 ±03

pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10' 1 Re 3011 (3.7 ±0.3) x 10' 1 280 (2.9 ±03) x 10*' W 29.78 (3.5 ±0.3) x 10' 1 290 (2.8 ±03) x 10-' Ta 29.45 (33 ±0.3) x 10- 1 300 (2.7 ±0.3) x 10-' Hf 29.04 (1.7 ±0.2) x 10‘ 1 310 (1.4 ±03) x 10-' Yb 28.31 (1.3 ±0.1) x 10* ‘ 330 ( 13 ± 0. 1 ) x 10*'

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 10 -2 355 (3.5 ±0.4) x 10' 2 Dy 26.80 (2.6 ±03) x 10' 2 360 (2.5 ±03) x 10' 2 Tb 26.58 (2.5 ±03) x 10- 2 3 70 (2.5 ±03) x 10- 2 Gd 26.04 (1.6 ±03) x 10" 2 380 (1.7 ±0.2) x 10' 2 Sm 2536 (1.3±03)xl0- 2 390 (1.4±0.2)x 10' 2 Nd 24.96 (93 ±0.9) x 10' 1 405 (1 ±0.1)xl0- J Ce 24.00 (8 ±0.9) x 10“ 1 420 (9 ±1 )xl0' 3 La 23.39 (8.4 ± 0.9) x 10' 3 430 (1 ±0.1)x 10* 3 Sb 2136 (1.2 ±03) x 10' 2 460 (1.5±0.3)x I0" 2 Te 21.19 (8.8 ±1 ) x 10' 3 465 ( 1.2 ±03) x 10- 2 Sn 21.06 ( 1.3 ±0.2) x 10- 1 465 (!.7±0.3)x 10’ 2 Cd 20.49 (1.7 ±0.3) x 10" 2 470 (2.2 ±0.4) x 1C 2 Ag 20.47 (2 ±03) x 10~ 2 470 < 2.6 ± 0.4) x 10" 2 Zn 13.76 (2 ±0.4) x 10-' 515 (3 ±0.6) x 10-' Cu 13.44 (2.4 ± 0.5) x 10-' 515 (3.6 ±0.8) x 10*' Ni 13.35 (34 ±03) x 10-' 510 (3.6±0.8)x 10-' Fe 12.10 (3 ±0.6) x 10”

510 (4.4 ± 0.9) x iO"'

Fig. 2. Nuclear fissilities as a function of Z

2 .A. Experimental points: solid circles represent our dat3;

squares, the data from ref. 4); open circles, the data from ref. '); and crosses, the data from (p.O 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 and Sassi 1

2

). FORM M3S-418

fR EV. 7-1 4-«4> USC OMM-N BS-O 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

.

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 36
cioi»

MCimn

(pb)

A. Jarund and B. Forkman

Z. Ph/sik A281 , 39 (1977)

La 139 57

KE - . ‘.O,

77 Ja 2 egf

P-. £ S £ = C

v

5 ^‘ erV '( t ec ro- AMCLi

G,NA24 ABY THR-999 C 400-999 ACT-I 4PI

• — — — •

L 999

=r ~gev

1 1 1—i—:—i n

!I — - -

rig ih Brf'rsttraN jr>g ent'gy (MtV)

recalculated using the monitor curse of [5]

cal errors ir. the numbers of y1 a) is measured in [1] and has

Ki» ; ntCfftrun cross section in the energy range 400 to 1000 Mc^

tsIcJateJ the > lelds of TsfW l in this work and of Figures 1 to

r - ' 7h« erro**y> gisen bj 'Qqxs ;r. some points

Fig. d. Mean cross sections of the present -orW and of [l] <•)

compared with the cross sections in proton irrad.ancns. + 400 MeV

f'om [4] o 700 MeV from [16] and an extrapolated value from [17],

J *:

t- - • r 37
*ef I. Jacob, R. Moreh and A. Wolf

Nucl . Phys. A291 , 1 (1977)

EL EM. SYM. A

La 139 57

METHOD REF. NO.

77 Ja 4 egf

SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE

ANGL E

G,MUT LFT 7 D 7 NAI-D a

(7.29,7.632) (7.29.7.63 h

Abstract: A variable-energy '/-source is obtained by nuclear resonance scattering of neutron-capture y-rays through various scattering angles. An energy resolution of less than !0~* is obtained. Pb and Cd

targets were employed to scatter the 7.279 and 7.632 McV photons, respectively, of the neutron

capture y-rays of Fc. Variation of the angle of the resonantly scattered photons between 60°-150'> permits an energy scan of * 370 eV (for i’b) and 3: 760 cV (for Cd) in any absorber. Thus nuclear energy levels in

1 ‘‘’La, Ce, Cd and J0,

*Lli absorbers were photocxciled and the corresponding values of gT„ were extracted from the measured absorption curve.

7.28,7.63MeV,RES ABS

COLLIMATORS I — , SCATTFRER k INCIDENT

1 . Schematic diagram of tnc experimental arrangement.

LOCO

LL' 0.996

>-

LU><

—IUJ

'V' 1.C02

1.000

0.998

0.995

ENERGY LOSS (eVJ

130 220 25C 300

i r~ i ! Pb SCArr ERE9

f

! ; . (7,779 M ? Vl|

2 8,2 A5SCtft3tSI

- . .

* -i

s

’ *

. •

"

’* • *1

—,

—

—

1

•>1 • .. 1 . i

* * *

• » .*

•

-i

i

77* ‘ 84*

(O)

9 b*j

300 320 340 360 lev)

1

1 1 = b SCAT F£ R (7.779 MeV)

j 13.2 g/cm2 !39 l 0 A8SCR8ER j

•j

* # i

, \y

-

(bl

96 102 103

9.64. , C*

62 -10 s

60 - '0"

sa-io 5

a SG - '0 s

,m5

5.40-10'

o

-O20<

SCATTERING ANGLE

Fig. 3. (a) Portion of the normalized absorption spectrum obtained using a 2S.2 g/cm : thick La absorber,

(b) Another portion of the spectrum obtained with a 18.2 g/cm : thick absorber using higher statistics of « 5x 10* counts, channel.

ovac

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUREAUOF STANOAROS FORM M3S-41I

(REV. 7-1 4-4AI USCOMM-NES-OC PHOTONUCLEAR DATA SHEET 33
Taiiu: 2 Summary o! experimental data and measured values of gf0 obtained using the •,•-monochromator

Isotope Thickness

[glcm: )

Ancle of dip

(deg)

<1 r. ') (eV)Effect

t°/

)

sr0 (meV) " : Cd *) 35 128.0 505 3.5 150 ±20

J*La 23.2 SO.O 225 0.40 8.0 ± 2.0 •’’La 13.2 100.5 322 0.27 7.1 ± 1.9

l3 *La 1S.2 1C4.S 345 0.22 5.5± l.S ,40Ce *) 26.5 90.0 273 1.3 25 ± ?> 2o-»b: 31.5 73.5 196 2.0 43 ± 3 J0 ’Bi* 31.5 68.3 404 l.S 52 ±12

The asterisk denotes a level at 7.632 MeV photoexeted by a Cd scattcrcr. All other levels arc at 7.279 MeV and were photoexcited by a Pb scattcrcr.

*) The absorbing isotope was arbitrarily assumed to be u:Cd.

*) The absorbing isotope was arbitrarily assumed to be ,40Ce.

*) Here J£ is the energy difference between the incident y-!ine and the resonance level (assuming no

recoil correction in the absorbing nucleus).

39
J.I. Uegaki and K. Shoda

Nucl . Phys. A294, 141 (1978)

EL EM. SYM.

La 139 57

REF. NO.

; 78 Ue 1 rs

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RAN GE

E,P ABX 14- 17 D 15- 18 MAG-D 125

Table 1

Strength of the resonance in the (7, p0) and (7. p) reactions on

1J9 La and ‘*‘Pr, and the ratio of proton group 1 and proton group 2 emitted through the f,,j JAR KV* Proton Proton

(jib MeV) O^b • MeV) group ! (°i) group 2 (%)

lA.pr 44+9 240+30 40+ 10 60+ 10

l39La <5 260 ±30 5± 5 95 ± 5

E- ( MeV J

Fig. 2. The differential cross section of the ' ,9La(c. e'p) reaction for

l) = 125 J . The solid line shows the result of a least-square fitting with

eq. (4). The dashed line shows the part. The dash-dot line is used in order to dclinc the position of the sudden increase as shown in fig. 6.

1 39 La, 14l Pr(e. e'p)

Fig. 5. The proton spectra of the* J9 La(e, e p) reactions for 0 = I25.3;

form N3S-418

iRSV. 7*14- 641 USC OMM-N BS-D C

over

U.S. DEPARTMENT OF COMMERCE NATIONAL 8URSAUOF STANDARDS PHOTONUCLEAR DATA SHEET 40
$ 2 Eu

Co

7 1 a

•oo

X)

14 15 16 17 Ex(MeV)

l-ij: 7 The 1 '“Lai. . p

i cro'> 'Cciion

*La ( r.pj 9 = 125 3*

i**l 1 (it

1

1 1 1 1 1

. |

, i » •

' ' 'I'l it

41
ref. J. Uegaki, K. Shoda

Nucl . Phys. A341 , 125 (1980)

EL EM. SVM. A

La 139 57

METHOD REF. NO. 80 Ue 1 hg

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,P ABX 11-25 D 15-25 MAG-0 125

-

Abstract: The cross sections and the proton energy distributions of the (e, p) reactions on

,3,La and VIRT PHOTON ANALYSIS

“‘Pr have been measured around the T, GDR. The energies of the T> GDR have been given as £„ = 21.0 MeV in '^La and £„ = 20.4 MeV in '“Pr. The decay protons of the 7, GDR have

been studied. The proton groups which leave the residual nucleus in the neutron particle-hole

stales have been clearly seen in the same energy regions as the decay protons emitted through the low-lying 1AR.

E NUCLEAR REACTIONS 1J,, La, “‘Prfe, p). £ = 15-25 MeV; measured <r(£,), deduced <rfy. p) vs. £p

. Natural target.

Table 1

Results of the energy-weighted integrated cross-section calculations

Element

£«" e; £« - £* (MeV) *V) <f-Ja -,(%)

(MeV) (MeV)

exp. theor. (mb) (mb)

exp. theor.

' 3, La

‘•“Pr

1 5.2 ± 0. 1 b

) 15.1 ±0.1 b

)

21.0 + 0.2 20.4 + 0.2

5.8 + 0.3

5.3 ±0.3

5.83 c

) 5.32 c

)

136 b

) 125 b

)

1.01 ±0.07

1. 27 ±0.24

0.74

1.0

2.3 ') 3.0')

*) The notation shows a I , = j(a <: £)d£. al , = j(er > £)d£.

”) Ref. 10

). Integrals were carried out up to 25.0 MeV by present authors.

e

) Calculated by using eqs. (1) and (2) in the text Refs. 3 *).

Fig. I. The proton spectra of the^. p) reaction at d = 1 25. 3° laboratory, (a) ,J, La. Bombarding enereies

are £t = 22.0 MeV and £. = 20.8 MeV. respectively, (b) ‘“Pr. Bombarding energies are £, = 21.4MeV

and £, = 20.2 MeV. respectively.

form N3S-418

IPEV. 7*1 4. 04

1

USC OMM-N BS-OC

0VB8

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OR STANOAROS PHOTONUCLEAR DATA SHEET 42
3

(c) '

• **La(e,p) Cross Section ,|

?

8 = 125 . 3

° i

— 6

ii

<n MN

e s

1 o

3»o 4

1

1

c:3 3

1

1

bo

2

1

l

i •

i i i « » 1 13 4 17 • 9 20 21 22 23 24 23 E

e (MeV)

Fig. 2. The differential cross sections of the (e, p) reaction at 0 = 125.3* lab. The arrows show th« positions of inflection caused by T, GDR. (a) ,3 *La. (b)

141 Pr.

Fig. 3. The (7, p) differential cross sections calculated from the present (e. p) differential cross section by the least structure method [ref. ")]. The broken lines indicate assumed contribution of the TK GDI

to the(/, p) cross section, (a)

114 La. (b) 141 Pr.

43
.
Ce

CERIUM

Z=58

Cerium was discovered in 1803 by J. Berzelius and W.

Hisinger working together as well as by M. Klaproth working

separately. An interesting alloy of cerium is misch metal

which contains 50% cerium, 25% lanthanum, and various other

rare earths as well as iron. It is this material, used in

lighter flints, that produces the shower of sparks. It is

also used in making tracer bullets that ignite from the

friction of the air and display the bullet's trajectory.

Ce

-5

Ce

E.G. Fuller, B. Petree, M.S.

Phys. Rev. 112, 554 (1958)

. *400

Betatron; ion chamber

Weiss

CLEM. SYM.

Ce 58

REF. NO.

58 Fu l NVB

REACTION result EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE HANOI TYPE RANGE

G,XN ABY 7-40 C 7-40 BF3-I 4PI

Table L Target properties and results.

Element Form used Weight

grams

0*(y.n)* barns

S.cf£> SZ/A

Mev-b

••r~» Mcv

Sn Sn 4.81 0.30 0.064 5.0

I I 8.55 0.36 0.035 6.0 La La 10.43 0.34 0.063 5.2 Ce Ce 4.99 0.45 0.080 4.5 Sm Sm,Ot 2.90 0.26 0.073 8 6 Tb Tb40? 304 0.59 0.087 8 7 Ho HojO» 1.87 0.41 0.079 7.5 Er Er,0, 5.41 0.50 0.100 3.5 Yb Yb,0. 3.57 0.30 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

u the maximum value and ‘T" the full width at #*f-r,.)/2 the neutron production crow section corrected for multiple neutron cn ““"i

n0t fitted *,£h «*««« to determine the* ,,H aevwSSSr a3rm:trt !oc mulu

..p..

1?' ,, Mean ener?y and width of giant resonances. and

at half

IOr Ph°t0n aQsor?tlon and the fuU width tmutn Of the giant resonance obtained from dashed “ in

. No attempt was made to fit data with esonance curves to obtain these parameters.

^S-41*

4. Ml

j*n * o- p«4 photosucltaa data sheet 47

U.S. DEPARTMENT Q* COMMERCE

NATIONAL BUREAU^. IT ANPASOS
tiiSA- REF. ELEM. SYM. A , Z

F. I. Havlicek

Nuovo Ciraento JLJ, 969-73 (1959)

METHOD

Betatron

Ce 53

REF. NO.

59 Ha 2 NVB

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, A SPC THR - 30 C 30 EMU-D 2 - 5 DST

form NBS-418

(REV. 7-14-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 48

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
k.G. Bakar, K.G. McNeill

Can. J. ?hys. ^2, 1159 ( 19^1

svM. ; A

Ce

j

z

58

asTMoo

Betatron; fast neutron yield angular distribution; Si threshold

detector; ion chamber

Her. no.cl Ba 2 NVB

REACTION RESULT EXCITATION

EH E ROY SOURCE DETECTOR

ANGLE TYPE HANOI TYPE RANGE

G.XN ABY THR-22 C 22 TER- 1 5-+ DST

i .. In Table 4-.

C - average cross section, of detector

weighted with neutron spectrum

- neutrons/lOC roentgen/mole

W-.3) - a

Q Y [1 + a

q

Pa

(cos 9 ) ]

TABLE IV

I Element

11 a

11! *k IV V

(tf*)X10»* VI VI i 4wi(22Mev)X10*

Vanadium 245 1 (1±0.0C) 0.01±0.08 —o.co±o 10 6.05 0.21 0.12 Chromium 104 1±0.03) 0.04±0.04 —0.05 ±0.05 4.C5 0.17 0.10 Manganese 30S ti±0.02; 0.07 ±0.03 —0.09±0.04 7.61 0.25 0.12

Iron 200 1±0.03) 0.05 ±0.04 —0. 17 ±0.05 4.94 0.18 0 11 Cobalt 390(1±0.02) 0.08 3=0. 03 -0.22 ±0.04 9. 03 0.26 0.15

Nickel 145(1±0.05) 0.07 ±0.07 —0.23±0.00 3.58 0.12 0.12 Copper 3471(1 ±0.02) 0.05±0.03 -0.29=0.04 8 57 0.30 0.12

Arsenic 482 1[l ±0.03) 0.11±0.04 -0.24=0.05 1 1 .91 0.33- 0.15 Rubidium 638i(l±0.0o) 0. 13±0.0C —0. 14±0 08 15.76 Strontium 4001fl±0.05) 0. 10±0.CG -0.17*0.08 10.10 Yttrium 2001 1±0.10) 0.08±0. 12 —0. 12±0. 15 7.ie

Silver 5901 1±0.W) 0. 10±0.06 -0.22*0.08 14.57 0.87 0.07 Cadmium 9051 1 ±0.02) 0.02 ±0.02 —0.2t±0.03 22.35

Iodine 11331;i±o.o3) 0.04 ±0.04 -0.29 ±0.05 27.99 1.42 0.08 Barium 10481;i±o.o4) 0.10±0.00 -0.38=0.08 25.89 Lanthanu n 15951 1 ±0.02) 0.02*0.03 —0.42±C.04 39.40 1.04 0.15 Cerium 1310 (;i±o.o5) 0.05 ±0.00 -0.39 ±0.08 32.50 Dysprosit n 1052 ( 1±0.0S) 0.04 ±0.10 —0.34±0. 13 40.80 Tantalum 1 558

1

1 ±0.02) 0.04*0.03 —0.22±0.04 38.48 2.50 0.CG Tungsten 1305 ( 1 =0.02) -0.07 ±0.03 -0.24 ±0.04 33.71 Mercury 1345 ( 1±0.02) 0.04 ±0.03 —0.3l±0.04 33.22 Lead 2274 (i±o.oi) 0.02 ±0.02 -0.42 ±0.03 50.17 2.72 0.08 Biamuth 2162 ( 1±0.02) 0.05*0.03 -0.45 ±0.04 53.40 1.30 0 . 0c Thorium 3031 < 1 ±0.04) 0. GO ±0.05 -0.32 ±0.07 74.87 Uranium 4630 ( 1 ±0.02) 0.05 ±0.03 -0.17*0.04 114.36

. 3. 17 X 10* «• atOUbarB-Mvlraa. bm u< Mamterd trron dut l« contiai auiinica only.

PHOTONUCL EAR DATASHEET 49

U.S. 0£PARTV!»..<T OP COMMERCE

NATIONAL Wf.J .0 OP STANDARDS
. 1.

REF' J. Miller, C. Schuhl, C. Tzara

EL EM. SYM. A z

J. Phys. Radium 22, 529 (1961)

Ce

METHOD REF. NO. Positron annihilation; neutron cross section; BF^ counter;

ion chamber cl Mi 1

58

NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,XN ABX 8-21 D 8-21 BF3-I 4PI

form NBS-418

(REV. 7-14-04) USCOMM-OC 2001 0* P64 PHOTONUCLEAR DATA SHEET 50

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
ai. J. Miller, C. Schuhl, C. Tzara

Nuclear Phys. J2, 236 ( 1962 )

| Elem. Sym.

Ce

Linac; monoergic phonons by e' annihilation in flight; Nal monitor;

* BF, detector

«' ' 11 ' **

Ket. No. 62 Mi 3

58

JHH

xvcacnon E or AE

s

(7d E J * Notes

Ce (Y,xn 10-21.2 jl5.6±0.5 21.2

[ = 1.88±0.03

MeV-b

Tableau 5 R^aultats exp^nmentaux

Elements ^11- No (MeV) iMeV- b)*)

0ta» Seuila 0.06 SZIA y. q y. p

•/. 2a y. ap

Cu 0 17 x0.3 0 43-0.013 0.47±0.015 La 7 13.6x0.5 1.91x003 0.94 x0015 8.80 “) 14.23“) 14.90 *»)

( 9.03 “) 8.30 “) 14.1 *«)

142

9 13.8-0.3 1.98x0.03 0.92±0.015

l 7.15 **) 9.50 “) U.3 >•) Ta 181 9 12 -0.5 2.97 ±0.05 1.13±0.02 7.33 *•) 13.84 “) 13.47 u) 16.5±0.3 Au 197 10 14.2-0.3 3.00 ±0.03 1.06 x002 7.90 “) 13.71 “) 12.94 a) 208 . 10.6 «) 7.1 >•) 14.3 l ») 14.3 *•)

pbj 207 11 13.8x05 4.10x0.06 1.38±0.02 3.2 “) U.J “) 17.9

I

' 208

1 6.9 “) 3.4 “) 15.0 “) 14.2 '*)

Bi 209 12 14.0±0.5 3.73 ±0.06 1.24x002 3.79 “) 10.4 u)

Fig. 8. Section cfficacc a = o(y. n)+ff(y, np) 4- 2a(y. 2 n)+ ... pour l< cerium.

-o bm NBS*418 B*HS)

jSCOmm-OC *.8538*

•) L’iategrale J^trd£ e«t pru» jusqu 4 x egai 4 19.6 MeV pour Cu. 4 21.2 McV pour La ct Ce et a

22 MbV pour Ta. Au. Pb ec Bi. D'autrc part, lea erreur* mdiqueea soot lea arreura stanatxqoaa.

1 — I U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS

PHOTONUCLEAR DATA SHEET 51
REF. R.B. Begzhanov and A. A. Islamov

Zhur. Eksp. i Teoret. Fiz. _46, 1436- 1433 ( 1964) Soviet Phys. JETP_12, 1005 (1964)

method [40 Radioactive source La ; resonance scattering cross

self -absorption

ELEM. SYM.

Ce 53

section,

REF. NO.

64 Be 4 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,G LFT 2 D 2 NAI-D 120

(1.597) (1.597)

Average resonance scattering cross section = (3.7 ± 0.4) x 10 26 cm

2

Lifetime of 1.597 MeV state = (2.15 ± 0.080) x 10 13 sec.

FORM NBS.41S

(REV. 7-14-04) USCOMM.OC 20010* P64 PHOTONUCLEAR DATA SHEET 52

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
G. Ben-David, B. Arad. J. Balderman, and Y. Schlesinger

Phys. Rev. J^6, B852 (1966)

ELEM. SYM.

Ce

METHOD

Nuclear Resonance Scattering using N,G reactions.

REF. NO.

66 Be 3 JDM

EXCITATION SOURCE OETECTOR

REACTION RESULT ENERGY TYPE NANCE TYPE e AN Cl ANGLE

G,G RLX 5

- 10 D 5-10 NAI-D 5 - 10 135

j a.

„ a

h H a B

H

liiid n |an m ll

PSaKCaTiVC/UaFeCsNCiiZnSeSrrZfttiAqCdSnStrtieoloCrPrNdSfiGdOirHsErniHfTiiVPtAgHijTmaiTliU

«*iTl3eB22O243a2TB92S»54BJ640«2<7 *«'5asi 32 3) M 57 1 8 59 60 62 64 64 (7 (6 70 72 73 74 a 73 90 Si 02)03 90 32 » 54 74 94 m4 S 32 60 60 74 96 V 14

33 a 62 62 a a M 96 «

34 34 34 a a 99 eo M 31 36 36 4444 40 40 00 00 129 IT 37 a 45 •1 • 101 22 122122 Jt 44 44 nacszESEcaz MCBC2 2404 04 lOMOM 40 40 67 63 03 03

22 22 42 66 66 44 94 44 04 04

23 43 49 85 05

24 24 4444 70 7b TO St St Of 04 04 *K2

23 46 46 71 •7 07 Ml as m 72 72 72 m M 84 090909 <66 27 27 300000 n 90 90 90 09

t 3*2*2*261 26 51 74 T% 74 91 HO a a a 76 92 »2 32 « 12 XXX 33 a SI 14 a 34 34 94 94 16 a 96 69 17 M 36 96 96 44 «* % 17 co M a

Fio. 3. Hlitofrmm of distribution of observed resonances among the different targets. The atomic number is given directly beneath

the chemical symooi followed by the neutron numbers of the naturally occurring isotopes. Magic numbers are shown in brackets.

. nu H8V41I

l— c W f. I |. *41 "** 'MM.Qf. J.PM-I-.4

Table III. List of effective cross sections.

Scatterer

- ner»T Gamma

(MeV) source

4 (mb) Scatterer Energy

’ (MeV) Gamma

•ource

4 (mb) Sm"< 9.907 Nl 100 Sn 7.01 Cu 1 1 y) Pr“* 8. *81 Cr 9 Nd 6.867 Co 30 La 8.5)2 Ni 6 p r u* 6.867 Co 3

i e 8.532 Ni 3* Te 6.7 Ni Cu 8.409 Cr 24 La 6.54 12 Zr 8.496 Se 3050 Cd 6.474 Co 110 Zn 8.119 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 a a .k Tl 6.413 Ti 25 Cd 7.64 Fe 40* w ~~6.3 Ti . . h Nl 7.64 Fe 7« Sb 6.31 Hg 6* Pr1 ** 7.64 Fe 12« Ti 6.3

1

Hg

Tl 7.64 Fe 370» Sn 6.27 75 La 7.6.14 Cu 7 Pb** 6.15 G<1 Mo 7.634 Cu 11 Te 5.8 Ni . . .1 Ri» 7.6.34 Cu 4 La 6.12 Cl 35 Te 7.528 Nl 664 Pr‘«» 6.12 Cl 110 Bi»* 7.416 Se 100 pt 5.99 Hg 40-*

Bi** 7.300 A* 30* Tl 5.99 Hg 5* Pb"« 7.285 Fe 4100 Pb** 5.9 Sr . . .k Cl 7.285 Fe 34 Ce 5.646 Co 17 Pr«* 7.185 Se 30 3i» 5.646 Co 55 Tl 7.16 Cu 120 Pb"* 5.53 70 La 7.15 Mn 50 Hg 5.44 Hg 75* Bi** 7.149 Tl 2000 Hg 4.903 Co 385

• High-energy component of a complex spectrum.

• Abroad scattered apectmm with no observable peak atmcture.

• There are actually two lines of energies 7.647 and 7.6J3 MeV hairing equal intensities in the Iron capture gamma spectrum. The cross section has therefore been corrected, although there 11 no possibility at present at deciding which line is responsible lor each resonance.

• Is prooably an independent level>1 the complex spectrum of Ni t rtyi on Te.

• Rough estimate.

< May be inelastic component from 7.321 level in Te.

« The relative line intensities In tbit case are doe to Groshev and

co ••ofwn.

• No line >« known for the source at this energy.

1 Difficult to resolve among the many soares lines present et this energy. PHOTONUCLEAR DATA SHLs. 53
R. Bergere, H. Beil, P. Carlos and A. Nucl. Phys. A133 . 417 (1969)

METHOD

Veyssiere

Ce

REF. NO.

53

69 Be 6 egf

EXCITATION ENERGY

SOURCE OETECTOR

REACTION RESULT ANGLE TYPE RANGE TYPE RANGE G,N ABX 3-23 D 8-30 MODI

4PI

G,2N ABX 12-30 D 3-30 MODI

4PI

G,3N ABX 24-30 D 8-30 MOD- I 4PI

nd

n

d

fraction of total cross section resulting in a direct neutron

fraction of neutrons emitted by direct effect at an energy where all the evaporation

neutrons go to (y,2n) cross section

x/(2-x) 603+ (G,N)

SQA (G,2N)

477+(G,3N)

Tableau 3 Moments quadrupolaires intrinsiques

Cible % isotopes a/ b ex Pi ex AWE,)] Qo C'o

ex (b)

53 I 100 %

1J7

I 0.85 ,0.172 -2.3 ±0.4

..Ce 38.5% l *°Ce 0.104

11.1 %

“2Ce 0.118 ,:Sm 15 % ‘“’Sm 11.2% 14,Sm j|

|

0.158

13.8% ,i9Sm 1 7.5% 150 Sm |

1.23 0.219

* 0.190 4.5 ±0.4

3.53 26.6% 152 Sm 0.304

J

1 5.93 22.5% 154Sm ' 0.351 ' 6.58

, 3 Er 33.4% ’“Er 1 0.341 1 7.60 22.9% ls7 Er

27.1 % “*Er

1.314 0.288 0.339 6.96±0.4

7.80

7.60 14.9% 170 Er J 0.329 J

1 7.45 7lLU 97.4% 175 Lu 1.282 0.262 6.95-0.3 7.20

Tableau 5 Valcurs dc la temperature nucleaire ct du parametre a dc densite dcs niveaux

X "a 0 (MeV) £',-£„ (MeV) a (MeV) a (McV-‘ ) «"(McV-‘)

I 0.05 ±0.005 0.03 l0.03 1.30^0.20 10 6 ±2.5 10 3 10 _ 2

‘“’Ce 0.21 ±0.05 0.1 2 3:0.03 1.05 ±0.20 10 9 ± 3.5 7-3

‘*2Ce 0.8 ±0.20 6 9-4 8-3

Sm 0.1 8 ±0.04 0.10 ±0.03

Er 0.20 ±0.05 0.11 ±0.03 (12—4)

- OMMERCE

Lu 0.26+0.06 0.1 5 ±0.03 0.85±0.1 _ 9 12.5 ±2.5 V5 X 3

; anoaros

'54
Tableau 4

Regies de sommc

Noyau able

(elements naturcls) (MeV b)

"'o (McV - b) NZ

0.06 —

'To -4 0.06 NZ

a'oA

0.06 NZ

<T-l (mb)

'i . , . t - s TT-I (mb • McV-1

]

<7-2 /4“i

1

sal 2.02 0.14 2.30±0.I2 1.85 1.09 ±0.07 1.24±0.07 129 ±0.10 0.20 -0.02 8. 6-0.

6

2.7 -0.2

..Co 2.13 0. 1

5

2.53-0.13 2.04 1.05 ±0.07 1.24—0.07 140±0.12 0.19 ±0.02 9.5±0.6 2.5 -0.2

2.48 0.17 2.92-0.14 2.18 1.144:0.07 l.34±0.07 167 ±0.14 0.21 . 0.02 1 1. 8-0.8 2.75-0.2

»»Er 2.70 '-0.19 3.04-0.16 2.42 1.1 2 ±0.07 1.26 ±0.07 186^0.15 0.20 ^0.02 1 3.6 ± 1 2.7 ±0.2

7|Lll 2.65 0.18 2.96±0.I6 2.53 1.05 ±0.07 1.17 ±0.07 182 ±0.15 0.1 85 ±0.02 12.9-1 2.35 ±0.2

valeur moyenne

pour ces 5 corps 1.09 ±0.07 1.25 ±0.07 0.20±0.02 2.6 ±0.2

j . frofl

LCRENTZ

55

Fig. 4.
H. Beil, R. Bergere, P. Carlos, A. Lepretre, A. Veyssiere and

A. Parlag

Nucl. Phys. A172, 426 (1971)

ELEM. SYM.

Ce 58

REF. NO.

71 Be 4 egf

EXCITATION SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE ANGLE

G.SN ABX 9-18 D 9-18 MOD- 1 4PI —2AS +

Table 1 Lorentz line parameters corresponding to fits of total photoneutron cross sections presented in

fig. 1

,J,?La j*Ce ,A, Pr 59 rr .oNd ’iiPr*)

<r, (mb) 356 ±15 340 -15 360 ±15 350 ±15 315 ±15 320 ±20

£, (MeV) 15.3 ± 0.1 15.2 ± 0.1 15.0 ± 0.10 15.1 ± 0.1 14.9 ± 0.1 15.16 = 0.08 A (MeV) 4.70 ± 0.15 4.45 ± 0.05 4.35 ± 0.05 4.26 = 0.05 4.90 ± 0.05 4.49 ±0.05

(MeV • b)

2.6 ± 0.15 2.35 ± 0.13 2.42 ± 0.15 2.35 ± 0.13 2.43 ± 0.13 2.42= 0.17 A i sO-l ft n« I.16± 0.08 1.19± 0.08 1.14— 0.08 I.15± 0.08

0.06AfZA~

*) Lorentz line parameters given in ref. ,0

) for ,4, Pr. 10

R. L. Bramblett, J. T.

S. C. Fultz, Phys. Rev. Caldwell, B. L. Berman, R. R. 148 , 1198 (1966).

Harvey and

PHOTOnuCutAR CROSS-S'CTlOn

Tig. I. Total photoncutron cross sections for Ba. ,14 La, Ce. 14, Pr and Nd as a function of

incident photon energy E. 56

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
R. Pitthan and Th. Walcher

Phys. Letters 36B, 563 (1971 )

EL EM. SYM. A

Ce 58

REF. NO.

i 71 Pi 1 REACTION RESULT EXCITATION ENERGY

SOURCE

- DETECTOR

TYPE range ANGLE TYPe RANGE E.E/ SPC 4-18 XUl5 mag-d DST

Count i Comno

X33

too

S3

to

83

80

Ce(e.e') E0.65MeV

•\

\

\

Count 1

<* Coul73

70 83

e„.83M«v 9.129*

La % .... *ys5i<

%

80

75

70

SK

</**

<f *

*3*

a 10 12 V4 16 IB 20 e.

Fig. 2. Spectra of electrons scattered Inelastlcally from La, Ce and Pr targets at the same primary energy and the same laboratory scattering angle. No

background has been subtracted. Note the suppressed

zeros of the ordinate scales.

Fig. 1. Spectra of electrons scattered inelastlcally from cerium; parameters as indicated. No background

has been subtracted. Note the suppressed zeros and

tbe different scales oi the ordinates.

?orm N3S-418

in EV. 7-1 4- 64) USCOMM-CC 2S010-P44 PHOTONUCLEAR DATA SHEET 57

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
rip.

R.F. Barrett, J.R. Birkelund

Nucl. Phys. A210, 355 (1973)

METHOD

B.J. Thomas, K.S. Lam, and H.H. Thies

58

REACTION RKSUWT EXCITATION 6NSN0Y

ISUNcK ast gcf as

anolc type AANai TYPE RANOE G,N NOX m^LL £ ?? RF8-T /iPT

Fig. 12. Experimental values of the level density parameter a9 (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. Bahar, Nucl. Phys. A159 , 625

(1970).

15 T.D. Newton, Can. J. Phys. 34 , 804 (1956).

Fig. 15. Ratio versus atomic number A. Here aM is the level density parameter taken from

the neutron resonance work of refs. *• J

), 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

(V. 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)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS

FORM NSS-418

(REV. 7-1 4-04) USCOMM-OC 2«010-P«4 PHOTONUCLEAR DATA SHEET 58
Table 3 (continued)

Target N

(residual nucleus) *)

Goodness

of fit b

) no with

p.c. p.c.

£.(24) r

(MeV) c

) (MeV) d

)

"p (MeV 1 )*) (MeV" 1 )')

Ba 75 1% F 1.16 16.5-‘ JS 8a 15.39-,3S Ba 0.93 77 2%

78 7%

79 8%

80 11%

V 81 71%

La 80 100% F F 1.25 0.72 I5.5-l,, La 13.76- 13 *La 0.89 Ce 81 89% F G 1.24 0.70 17.0-13,Ce 17.8 -,4, Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-*‘°Pr 17.05-I42Pr 1.00 Tb ) 93 100% US' l9.3-l3 *Tb 2l.85-ld<>Tb 1.14 Dy •) 93 2% 1.06 20.9-“ l - 3 Dy 21.9 -l#1 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- li4 Ho 0.97 Er«) 95 2% 1.11 19.2-‘*‘Er 21.9 -‘**Er 1.14 97 33%

98 23%

99 27%

101 15%

Tm») 99 100% 1.03 24.0- ‘*®Tm 22.58-' ’Tm 0.94 Ta 107 100% G 1.00 0.49 26.0- 1,oTa 21.2 -l ‘ l Ta 0.32 W 107 26% G F 0.98 0.50 27.0-' ,3 W 23.0 -"J W 0.85

108 14%

109 31%

111 28%

Au 117 100°% G 1.19 17.5-'**Au 20.24— l, *Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-JO *Pb 10.1 -l07 Pb 1.35

(

Z

= 82) 124 23%

125 52%.

Bi 125 100% F 1.65 1.03 9.0-JO, Bi 13.8 -Il0 Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (•/, n) experiments.

*) 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 bremsstrahlung energy £0 = 34 MeV.

d

) Nuclear temperature from fit with constant-temperature formula.

•) Level density parameter at 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. ,-1

). •) Measurements of £»(Eg ) for these nuclei were made only for E0 = 21, 23 and 24 MeV.

59
F.R. Buskirk, H. D. Graf, R. Pitthan, H. Theiasen, 0. and Th. Walcher

PICNS-73, Vol.I, p. 703 Aailomar

METHOD

Titze, ELEM. SYM. A z

Ce

REF. NO.

58

73 Bu 14 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,E/ SPC 2- 20 c 50, 65 MAG-D DST

for the nuclei

The Z2 resonance which is

clearly visible at lo. 8-0.2 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 15?. Bohr and

Fig. 2 Mottelson '9.' predicted a collective E2 resonance whose isoscalar

part should depend on A through E =50 A

_1//^MeV. The data of Fig. 2 are consistent with Ex=65 A '^MeV suggesting to identify the observed resonances with this type of E2 excitation.

FORM N3S-418

(REV. 7.14.041 USC OMM-N BS-0 C PHOTONUCLEAR DATA SHEET 60

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. Rainer Pitthan

Z. Physik 260 , 28 3 (197 3)

EL EM. SYM.

Ce 58

method REF. NO.

7 3 Pi 3 eg!

REACTION RESUL T EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

L ABX 7- 21 D 50. 65 MAG-D DST

*

Fig. 5. Wie Fig. 2. aber nach Abrug des angepaflten Untergrundes. Die Zerlegung

des Spektrums in die Einzelresonanzen (nach Gl. (2)) ist eingezeichnct, J£ ist die Halbwerobreitc der clastischen Linie

(over)

FORM MSS-41S

in ev. 7 -

1

4.«4 > USCOMM-NB5-OC PHOTONUCLEAR DATA SHEET 61

'J.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
-

(e,e‘)

50MeV

165°

52
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

METHOD

ELEM. SYM.

Ce

REF. NO. 76 Em 2

58

egf

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RAN GE TYPE RANGE

G^F ABY THR-999 c 999 TRK-I 4PI

'

Table 1 999 = 1 gev

Measured values of <j% at 1000 MeV and deduced values of ak assumed constant from £0 to 1000 MeV

Element Z*/A

(mb)

£o

(SleV) (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 3110 4 1 ±0.3 230 2.8 ±0.3 Au 31.68 10±0.15 240 1.4 ±01

Pt 31.18 1.1x0.03 255 18 ±0.7) x 10

” 1 Re 30.21 (3.7 ±0.3) x 10

" 1 280 (2.9 ±0.3) x 10-' W 29.78 (3-5 ±0.3) x 10-' 290 1 2.8 ±0.3) x 10

* 1 Ta 29.45 (3.3 ±0.3) x 10-

300 1 2.7 ±0.3) x 10

' 1 Hf 29.04 (1.7 ±0.2) x 10-' 310 tl 4±0J)x 10

' 1 Yb 28.31 ( 1.3 ±0.1 ) x 10

" 1 330 1 1.2 ± 0. 1 ) x 10‘ 1 Tm 28.18 (7.5 ±0.8) x 10

' 1 335 i6.3 ± 0. 8 ) x 10

"' Ho 2711 (3.6 ±0.4) x 10

* 1 355 (3.5 ±0.4) x 10" Dy 26.80 (!6x0.3)x 10

- 1 360 1 2.5 X 0.3) x 10* 1 Tb 26.58 (2.5 ±0.3) x I0

' 1 370 1 2.5 ±0.3) x (O' 1 Gd 26.04 (1.6 x0.2)x 10' 1 3S0 ( 1 . 7 ±0.2) x 10* 1 Sm 25.56 (1.3 ±0.2) x 10

* 1 390 (1.4 ±01) x I0" 1 Nd 24.96 (9.2 ±0.9) x 10" * 405 (1 ±0.1) x 10' 1 Ce 24.00 (8 ±0.9) x I0

" 1 420 (9 ±1 (xIO * 1 La 23.39 (8.4 ±0.9) x 10

" 1 430 (1 ±0.1) x 10" 1 Sb 21.36 (11 ± 0. 2) x 10" 1 460 (1.5 ±0.3) x 10

' 3 Te 21.19 ( 8. 8 ±1 ) x (O'* 465 ( 1 . 2 ± 01)x I 0' 3 Sn 21.06 (1.3 ±01) x 10

' 1 465 (1.7 ±0.3) x 10

' 3 Cd 20.49 (1.7±0.3)x 10 _1 470 (2.2 ±0.4) x 10

" 1 A* 20.47 (2 ±0.3) xIO " 1 470 (2.6 ±0.4) x 10

" 1 Za 13.76 (2 ±0.4) x 10" * 515 |3 ±0.6) x (0

* 1 Cn 13.44 (2.4 ±01) x (O

' 1 515 (3.6±0.8)x 10- * Ni 13.35 (14 ±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 (O' 1

uj

S

u.

Fig. 2. Nuclear fissilities as a function of Z

1 fA. Experimental points: solid circles represent our data;

squares, the data from ref. 4); open circles, the data from ref.

7

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

). 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 and Sassi 11

). ?OQM M3S-4IS

’

JSC 0MM-N8S-0C PHOTONUCLEAR DATA SHEET 63

4 A. V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6_, 512 .(1968) . ^T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971).

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

81, 61 (1966).

0

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
* eF - I. Jacob, R. Moreh and A. Wolf

Nucl . Phys. A291 , 1 (1977)

ELEM. SYM. A

Ce 58

METHOD REF. NO.

77 Ja 4 eqf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

TYPE RANOE TYPE RANGE G,MUT LFT 7 D 7 NAI-D 0

<7. 29, 7. 632) (7.29,7.632 )

-

Abstract: A variable-energy y-sourcc is obtained by nuclear resonance scattering of neutron-capture y-rays 7.28,7. 63MeV , RES ABS

through various scattering angles. An energy resolution ofless than 10'*’ is obtained. Pb and Cd

targets were employed to scatter the 7.279 and 7.632 McV photons, respectively, of the neutron

capture y-rays of Fc. Variation of the angle of Inc resonantly scattered photons between 60°-I5(r

permits an energy scan of « 370 eV (for Pb) and « 760 eV (for Cd) in any absorber. Thus nuclear energy levels in La, Ce, Cd and ~° Bi absorbers were photocxcitcd and the corresponding values of gT0 were extracted from the measured absorption curve.

Fig. I. Schematic diagram of the experimental arrangement.

Tahli: 2 Summary ol experimental data and measured values of gro obtained using the y-monochromator

Isotope Thickness

('//cm;

)

Angle of dip

(deg) AE ‘) (CV)

Effect (50

°r,

(meV)

1 ' J Cd •) 35 12S.0 505 3.5 150 -20

,3, La 2S.2 80.0 225 0.40 8.0 ± 2.0

1 J,La 18.2 100.5 322 0.27 7.1+ 1.9

'•'"’La 18.2 104.3 345 0.22 5.5+ l.S

1 40Ce b

) 26.5 90.0 273 !.3 ;< a. n 20-31 31.5 73.5 196 2.0 43 + 8 31.5 68.8 404 l.S 92 ±12

The asterisk denotes a level at 7.632 McV photocxcitcd by a Cd scattcrcr. All other levels are at 7.279 McV and were pholocxrited by a Pb scattercr.

*) The absorbing isotope was arbitrarily assumed to be nJCd.

b

) The absorbing isotope was arbitrarily assumed to be 1 *°Ce.

c ) Here is the energy difference between the incident y-Iir.e and the resonance level (assuming no

recoil correction in the absorbing nucleus).

form NBS-418

(« EV. 7- 1 4* 641 USC OMM-N 05*0 C PHOTONUCLEAR DATA SHEET 64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
RCP R . pitthan, H. Hass, D.H. Meyer, J.N. Dyer and F.R. Buskirk

Phys. Rev. Lett. £1_, 1275 (1978)

METHOD

I EL EM. SYM. 1 A

Ce

REF. NO.

78 Pi 2

58

rs

REACTION SOURCE DETECTOR

ANGLE RESUL T ENERGY TYPE R AN GE TYPE RANGE

E,E/ FMF 5- 45 D 0* 1 MAG-D DST

( e ,&) from the giant dipole resonance (GDR) In M#Ce verifies the macroscopic model *Q=0 .3-0 . 7FM-1

by Myers et al., while ruling out the Stelnwedel-Jensen model and, to a lesser extent, the Goldhaber-Teller model. This result leadsto discrepancies between (a, a') and

ie,eJ

) concerning the existence of a giant-monopole (breathing-mode) state, particularly

if one considers the lndepended verification of the Meyers et al. model by the experi- mental energy dependence of the GDR.

FIG. 1. Spectrum of 92.1-MeV electrons scattered

inelastically from ,4 *Ce at 90°. The spectra with and

without the background are shown together so that the difference between the two may be seen. The reso- nances which were used for fitting the spectrum and

the background as described in the text are drawn. The “ghost peak" is subtracted from the lower graph.

The spectrum was taken and fitted with 10 data points per MeV. For graphical purposes the number of points

for the spectrum was reduced by a factor of 4. The

fitting range was 4-46 MeV. The statistical error is shown on selected poirXs . While the upper part has not been corrected for the constant dispersion of the magnetic spectrometer and thus shows the data points as measured, the subtracted spectrum has been corrected in order to show the cross sections of the resonances

in their true relation. While lower states (ghost peak) and higher resonances (background sensitivity due to failure of the calculated radiation tail to account for the measured one above 20 MeV) have rather large uncertainties (up to 50%), the region between 10 hnd 20 MeV turned out to be very insensitive to the choice of the background function. Details of the principles of

the analysis can be found in Ref. 9.

g

R. Pitthan, F.R. 8uskirk, E.B. Dally, J.0. Shannon,

and W.H. Smith, Phys. Rev. C 1_6, 970 (1977).

PORM N3S-418

» EV. 7-1 4-«4) use OMM-N bs-oc

over

u.s. cepartmentof commerce

NATIONAL. 3UREAUOF STANOARCS PHOTONUCLEAR DATA SHEET
FIG. 2. Comparison between the experimental cross

section divided by the Mott cross section [called form

factor (squared) in the text] and DWBA calculations

[S. T. Tuan et al., Nucl. Instrum. Methods 60, 70

(1968)] as a function of momentum transfer. Since the

data were taken at four different energies (150 MeV,

93”; 65 MeV, 93”; 80 MeV, 90”; 92 MeV, 90” and 105”), form factors were constructed from separate calculations at the correct momentum transfer for each energy and connected by a smooth curve. Other methods

presenting (e,e“) data in this case are possible, but ours has the advantage of cot manipulating the experi- mental points.

FIG. 3. The data points are identical to the difference between the cross section under the 15.3- MeV (£1) resonance and a DWBA calculation based on the GT

model and normalized to (y ,n

)

results (lowest curve in Fig. 2). Comparison with a monopole DWBA calculation shows that this difference is compatible with the pres- ence of 45% of the £0 EWSR. Reasons against such an

interpretation are given in the text.

66
REF. R. Pitthan, H. Hass, D.H. Meyer,

Phys. Rev. CT9., 1251 (1979)

F.R. Buskirk

METHOD

J.N. Dyer EL EM. SYM.

Ce

REF. NO.

58

79 Pi 4 hg

REACTION ReSULT excitation ENERGY

SOURCE detector

ANCLE

TV PC RANGE TYPE RANGE E.E/ ABX 6-38 D 50,92 MAG-D DST

The cross section for electron scattering from natural cerium 1 89% '*?Ce) has been measured with electrons of 80 and 92 VleV at 90 and 105* between 4 and 4g MeV excitation energy. The nine resonances or

resonance-like structures identified at £, =6 (31 A~' J), 7.4 (38 10 (52 .4~‘ ,3\ 12 (62 .4 _I ' J

), 15.3 (79 22 (114 4- 1 ' 5 ). 25 (130 A' 1 ' 3), 31 (160 A~‘ \ and 37.5 (195 A~ ui

) MeV were classified on the basis of their momentum transfer dependence and discussed in the framework of the shell model. Since some of

the arguments used are intricate we refer for quantitative particulars to the text. It is shown that the £2

sum rule strength not exhausted in the excitation range of this experiment may contribute up to 50% of the

classical dipole sum rule to the photon cross section between 50 MeV and the pion threshold. The resonance

at 10 MeV might be due to a separate oscillation of the excess neutrons against the rest of the nucleus.

NUCLEAR REACTIONS u0Ce(e.*'), £,= 50 tu 92 MeV. Measured d^/dndE,,

bound and continuum states igiant resonances). Deduced multipolarity, reduced matrix element fl(£X), radiative width T^, sum rule exhaustion of giant resonances, photon cross section to pion threshold, total width of continuum and

*“ clustered states.

FIG. 5. Data of Fig. 2 after the fitted background

(consisting of the radiation tail, the general room background. and experimental background) and the “ghost

peak’’ as described in the text have beem subtracted. These two spectra are shown together so that the shrinkage of smaller multipolarity transitions versus the growth of higher multipolarity transitions may be seen. The relative change in peak heights of the single reson- ances indicate very clearly the various multipoles contributing. Note, e g., that the £2 cross sections fall off more than a factor of 6 between the i0 MeV and the 92 MeV spectra.

(over)

H3S-41I

p E V . r- » 4- 04) USCOMM.DC 2401O-P44

ASSUMED TO BE 140-CE

5 10 15 20 2S 30 35 40 45 EXCITATION ENERGY (MeV)

FIG. 2. Spectra of 80 and 92 MeV electrons scattered

inelastically from M0 Ce. Resonances (or envelopes of discrete states) are indicated and discussed in more detail in the text. The bottom curved line in both parts is the fitted total background. Note that zero in the lower spectrum is not suppressed. The ghost peak has not been

subtracted from the data, neither are the cross sections corrected for the constant dispersion of the magnetic

spectrometer The spectra were taken and fitted with

10 points per MeV. which were reduced for graphical purposes by a factor of 4. Resolution was 500 keV, ap- proximately 3 of the width of the smallest resonance

found: the statistical error is shown on selected points

in the lower spectrum; it was smaller than the circles

in the upper one. The fitted range of the spectra shown was 4-48 MeV for the upper, and 4-42 MeV for the low- er spectrum (see discussion in text in conjunction with

, the 37 MeV state)

.

NATIONAL BliSEALCT ST.IMOASOS PHOTONUCLEAR DATA SHEET 67
TABLE X. Results in units of the reduced transition probabilities (B values), ground state radiation width (1^), and energy weighted sum rule exhaustion, for the major resonances found in this experiment. Some results for weaker

states, and those inferred from differences between cross sections and DWBA calculation, are, together with the appropriate discussion, scattered in the text. The isospin assignments are not determined by this experiment, but were taken from comparison with other experiments and theory.

Std. c Total J

(McV) E X A - 1/3 (McV) T (MeV) E\ AT B«P (fm 2 V r

3 leV) Rb dev. error

6.0 = 0.2 31 1.7 ± 0.2 3 0 1.3 x 10 s 2.0 x 10* 3 19 x 3 ± 6

10. Or 0.2 52 1.3 r 0.2 2 0 430 7.6 9 x 2 x 4

0 0 770 13 x 2 x 6 12.0 t 0.2 62 2.8 ± 0.2 2 0 2.5 x 103 10.0 63 e x 17 x 13 2 0 2.0 x 103 8.7 50 f x 5 x 10 15.3 r 0.2 79 4.4 ± 0.2 l l 41 5. lx 104 122 S x 12 ±20

1 1 55 6.9x 104 167 h x40 x 27

22 ± l 114 5 x 1 3 0

O n x 10 4 4.9 19 x 2 x 10 25 r l 130 6.5 x 1 2 1 1.3 x 103 2.1 x 103 50' x 3 x 15 2 l 2.1 x 103 3.3 x 103 77 h x 25 x23

34 - 38 175 7 -10 3 0 1.2 x 105 6.8 x 10 2 75 x 10 4-50 *35 195 0 1 2.8 x 103 130 x20 a. 50 ± 45

'For the monopole the measured quantity is |AI | 2 (fm 1 ).

hR = E x B (E\ )/EWSR(£A. , ATix 100.

c The error given (in units of R) is the standard deviation of the average sum rule exhaustion and is, therefore, more

a measure for the fit to a certain model than a measure for the total uncertainty.

d The total error (in units of R ) is based on the maximum and minimum values found for the areas under the curves

during the many attempts to fit the spectra.

e c tt = 1.0c.

f c„ = 0.95c. ?MS model with ot - 0.76. “GT model.

' MS model with a = 1.0.

68

co 'O 2 e

c co ©

S Tt» u C"*

2* -

® a % Z 1 S- -3 XZ z

n °

kj co £ ©

. CO —

’ *- z

:-s o

a £

1 -3 C

„ -s •- E 2 m .13 2

OT .*-»

^ • 5

xz y iflC s

£ U

- 1. SU « -

' —- O O r.u C — e- S £ i S £ S'j

£ 2 S

. c > 03 © -

2 3 ^

- - O ^ *-

kj © -3 S = g

5

*- 48 ^ jE kj

_ _ j© £ 3 «

*« c - c H

§ t s 1 ' s

“ 2 „ s = -T 2 f

= = 2 ; y ° -

- u o c i = o O —- - n O — y <-

2 S- = 3 s si

OT ~c 2

£ ©

c -

CM- 3

©

« y £ j

> 12 © C

r4 OT *y X I ?

g.3 s

© « 5 c o ©

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. £

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°

co D © L2 .2 i —

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5 ©

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a> £

x 2 5 11 3 -rt ® m •= 3 *M c

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o 5) X

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i

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kj -w

© ~

CL £

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> £ £ u 3 a:

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2

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^ ©

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- 11

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a X> q

: © u

-T C CO

OT ©

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kj £ ^

VD

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g| £>• ’— X ©

OT si w ^

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Si

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5 2 3 12

= £ — c ^

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'» OT « © 2 o - « w CM ^ —- “—

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y. ^ t: © y

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O

3 - . £ © £ 2

£ §

C w © p 1

a 5 a 2
Htf A. Lepretre, H. Beil, R. Bergfere, P. Carlos, J. Fagot, A. De Miniac,

A. Veyssifere

Nucl. Phys. A367, 237 (1981)

EL EM. SYM. Ce 58

method REF. HO. 81 Le 1 egf

SOURCE DETECTOR

ANGLE

REACTION RESULT ENERGY tvpe RAN Cl TYPE RANGE

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 cr u (Ey ) m

<r(y, in : Ey ) for neutron multiplicities ranging from i” 1 to 12. From these data the total photonuclear absorption cross section crttot : Ey ) 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,1 N IN G,SN

See 82LE3

<r"\Ey )» I <r(y. in:Ey

)

.

PHOTONUCLEAR REACTIONS Sn. Ce. Ta. Pb, U(y. rn>. Ey

=* 25-1401 MeV;

measured a(£,) summed for x = 1 — 12: deduced <r(E^ total), integrated <r, interaction models. Monochromatic photons.

Table 3 Integrated cross sections

Sn Ce Ta Pb U U

<7„-0 06.VZ/A (MeV b) 1.74 2.04 2.61 2.97 3.40 3.40 E^(MeV) 29.7 25 25 25 18 18.30

f S (MeV • b) M - <rCOB(E,)dET

!<r0 umt)

2.0 ±0.1 5

*)

1.15 ±0.09

2.13 ±0.15 t>) 1.04 ±0.072.90±0.23 *)

1.11 ±0.09

3.48±0.23 e

) 1.17 ±0.08

2.98±0.15 d

) 0.88 ±0.05

3.58*)

1.05

f ,40M‘ v iMevb)

,V- <r

2>(Ey ) dEy Je,y

(<t0 unit)

0.96±0.1

0.55 ±0.06

1 .27 ±0.1

0.63 ±0.05

1.73 ±0.15

0.66 ±0.06

1.69±0.15

0.57 ±0.05

2.59± 9.2 0.76 ±0.06

2.59±0.2

0.76 ±0.06 (MeV • b) W + N

(<ru 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±0.106.17±0.3

1.81 ±0.10 (M V) + evaluation of the

. 140 M«V

\a

1 * - a'

2,

| d Ey contribution

Je,®

1 .74 ± 0. 1

5

1.71 ±0.15 1.81 ±0.15 1.7S ±0.15 1.68 ±0.15 1.85±0.15

» (1 + K) (<r0 unit)

j

<rL(£T ) dE, (cr0 unit) 1.28*) 1.24 ^ 1.30 '’l 1.35 *) 1.18

d

) 1.43*)

*) Ref.

36

). 6

) Ref.

37

). c

) Ref.

5

). d

) Ref.

3 *). *) Ref.

3 ’). The symbols M and N are defined in the text. The last row gives the integrated cross sections for the Lorena line fit, <rL(ET ) to the GDR data, published in the above references.

(OVER)

ronu NBS-41S

<R CV. 7- 1 4- *41 USC OMM»N BS*OC PHOTONUCLEAR DATA SHEET 69

U.S. DEPARTMENT OF COMMERCE

NATIONAL IUKIAU OF STANOAROS
Fig. 11. The general behaviour of ihe "smoothed" average neutron yield cross sections <r(y, *n) =

Z, y. in . Ey ) for the Sn, Ce, Ta, Pb and U nuclei studied in the present paper (see text).

Fig. 15. Total photonuclear absorption cross sections <r(tot: £,)»<r'*’(E,) 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 Ey between 20 and 140 MeV are compared with: (a) Lorentz line tits to the G DR data of the appropriate nucleus represented by the dot-dash o- L (E,) plots, lb) Quasidcuteron cross sections. <rOD(E,) = (4.6.VZ/ A )o- 0i£y

) for the appropriate nuclei, represented by

the dotted <tqo(Ey ) plots. Here <r Dt£, ) is the photodisintegration cross section of deuterium, (c) Modified

quasideuleron cross sections, codmI^t)* (8.YZ/ A)<rD(£Y ) exp [-DIE,) with D = 60 MeV, represented by the dashed <7-mqo(E t ) plots. Pertinent GDR data for Pb. Sn, Ce. Ta and U were taken from

70
REF M. Schumacher, F. Smend, W. Muckenheim, P. Rullhusen, H.G. Borner

Z. Phys. A300 , 193 (1981)

EL EM. SYM.

Ce 58

methoo REF. NO.

81 Sc 6 egf

EXCITATION SOURCE OETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE 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 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 coherent 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 piay a small role at 6.5 MeV.

2.60-6.76 MEV

Table 4. Properties of levels observed by phoioexcitauon. [Ua 4fi) N,F experimental differential cross section per identified isotope or element for resonance scai'ering through 9 = 90° /*: spin-parity of excited level: W(9) angular correlation function. g = l2/„ + D.(2/ ( T- 1); H,: radiative groundstate transition width, f : total level width. Errors in the

last digits are given in parentheses

Isotope £,(MeV)

IdoJQ)*”

(jib/srl

/• r^n fvi©igr0

2 r

(meV)

C' (meV)

ri*0 (meV)

2.754 13 (4) ID 0.77 0.145 0.084 .

5J, U 3.254 421 (5) I- 0.24 0.83 1.5 0.52(15)'*

i0*Bi 6.555 11 <4)-102 - - 0.74 0.74“ -

20 *Bi 7.168 1.7 (3) 10s 9/2** 1.00 710 786 820 ( 40)*

20JT| 6.418 8.75(30)- 10* 1/2* 0.23 30 102 82 (15)* n 6.759 7 (3) - - - - - Hg 6.555 68 (17) - - - - - u*w 6.418 5.2 (3) 10* 1”* 0.32 1.75 14 - n«W 6.555 9.8 (101 10 2 (D u.j2 3.44 2.9 -

lf4W 6.759 46 (10) ID 0.58 0.17 0.13 - "‘Ta 3.010 174 (17) - 0.72 0.42 0.59 - '“Ta 6.418 62 (4) - 0.73 0.2 0.27 c - "‘Ta 6.759 4.8 ; 12) - - 0.018 0018* - '“’Ho 6.413 10.3 130) - - 0.035 0.035“ -

16, Ho 6.759 5.6 (14) - - 0.021 0.021* - Nd 2.754 2.6 (5) - - - - - Nd 3.254 140 110) - - - - - Ce 6.759 13.4 (10) - - - - -

,2, Sb 3.452 120 (5) 10 J - 0.60 19 4.9* -

100 Mo 6.418 1.53 14)- 10* !** 0.88 52 26 25 (8)* ,4Mo 6.555 4.4 <41- 10* (D 0.33 IS 21 - Mo 6.759 6.2 (15) - - - - - Mo 7.168 8.2 (26) 10 2 - -

*[ll] * W, (f?lg/^r =1 assumed c lV(<9)g=l assumed

* [23] (a small correction has been applied to the data of [28])

* Upper limns in case not all the transitions to lower levels were observed

' Present work * Previous work

«o«« MSt-aU

IR IV. T. I «-«4J ijscomm-oc 2*010- pea

(OVER)

PHOTOHUCLEAR DATA SHEET 71

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 5TANOAWOS
Table 1. Differential cross sections for elastic scattering l<f<r of photons from ,bCo 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

2.599* IMeV)

2.754 b |MeV|

3.010* (MeV)3.202* (MeV)

3.254* (MeV)3.273* (MeV)3.452* (MeV)

90 338 u 52.7(25) 57.5(25) c 56(16) 47(4) 456 (10)* 34(6) 49(14)

:o, Bi 33.1(30) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33(15)

n».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) 34(15l “•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 (61 l8l Ta 20.0(15) 19.2 (6) 1931201* 20(4) 17.3(21) 18(5) 21 (8) 165 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 1U (9) 11-0 (5) - 11(3) 9.5(13) 8(4) - inj 8.4(10) 8.6 (5) - 9(2) 7 (1) 6(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 62 (5) - - 6(2) 6.6 (8) 7(3) -

i:o 23>u 55.1(25) 64 (4)

e 43(15) 55(5) 574 (10)* 48(5) 48(11)

181 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)“ -

* 3bCo source in Fe lattice

" 24 Na source in A1 lattice (part of data have been published elsewhere)

c Transitions to exerted states observed in addition to the ground-state transition

J Photoexcitation of nuclear level identified from the size of the differential cross section

Table 2. Elastic differential cross sections dad CUB =90°) in pb, sr measured with the Ti(n.y) source and compared with theoretical predictions. n

:

predicted number of levels in a JE = 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.

238 U 23 (12) 10.3 _ _ _ _ _ 45

20V Bj - - 219(39) bc 8.0 12 (4) 7.4 1.5(3)- 103b * 5.7 0.1 n*.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 “‘Hg 12 (3) 7.8 74( I7) b 6.5 6.7(15) 6.4 - - 3.4 "*‘W 159 (10)*-* 6.6 306(33)** 6.3 20 (2)*-* 5.6 - - 13 mTa 68 (4)*-* 6.3 - - 10. 1(1 2)*’-* 5.3 - - 28

' b3 Ho 15 (3)» 4.7 - - 9.5(14) b 3.9 - - 18

n*'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)*-* 2.5 407(39)*-* 2.5 8.5( 15) b * 2.3 817(258) b * 2.0 0.5

n*‘Zn 2.4 (8) 1.6 - - 1.8 (5) 1.5 - - 0.3

J Transitions to excited states observed b Photocxcitation identified from size of differential cross section

‘ Photoexcitation reported in [11]

Fig. 11. Same as Fig. 9 but for (A) ,45 Ho. (B) “*‘Ce and (C) “*Sn
ref. A. Lepretre, H. Beil, R. Bergere, P. Carlos, J. Fagot, A. Veyssikre CUEI1 SVM

I. Hal pern

Nucl Phys. A390, 221 (1982)

Ce

METHOD REF. NO. 82 Le 3

58

EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,XN N0X 30-140 D 30-140 M0D-I 4PI

See also A. Lepretre et al . NPA390, 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 iSn, Ce. Ta and Pb), it was possible to determine the mean

number of photoneutrons, i, for each photon energy and the widths VV 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.

| PHOTONUCLEAR REACTIONS Sn. Ce, Ta, Pbfy, xn), £ » 25-140 MeV; measured E 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

V 4.3 ±0.2 4 ±0.2 4.5 ±0.2 4.8 = 0.2

0 50±0.1l 0.59±0.13 0.71 ±0.16 0.66 = 0.15

it\ 0.24±0.05 0.26 ±0.05 0.27 ±0.05 0 23=0.04

3.8 ±0.3 3.4 ±0.3 3.8 ±0.3 4.1 =0.3

E, iMeVl 23.4 ±5 26.3 ±6 28.7=6 26.6 = 6 £'f t.WeV) 46.6 ±6 43.7 ±5 41.3 ± 5 43 4 = 5

tSee caption under table 1.)

Experimental data are taken from ref. ') and fig. 2 of thts paper, v stands (or neutrons and it for protons: f stands for

fast particles and s for evaporated particles. £’ is the residual excitation energy alter all fast particles have escaped - carrying with them energy £*. The coetficients a and 0 have to do

with the ratio of fast neutrons to fast protons that are e mined. They are explained in the text. The uncertainties in this table are statistical only.

(OVER)

POflM M8S-41!

'REV. 7.14.14) USCOMM*OC 2t01O-P«4

U.S. DEPARTMENT OF COMMEPCi

NATIONAL 9UREAUOF 3T AMOAR3S PHOTONUCLEAR DATA SHEET 73
Ce

T

a

Pt>

Fig. 2. Average experimental photoneutron multiplicities £(£,) plotted against photon energy Ey, for 25 MeV s Ey « 140 MeV. Data points were evaluated using results from ref. '). The full line represents

a smoothed average behaviour. The dashed line represents Ey ) values, measured in the giant dipole resonance iGDRi region, in previous Saclay experiments ). Fig. 2a: Sn; fig. 2b: Ce: fig. 2c: Ta; fig. 2d: Pb [where the point refers to the SIN

19

) measurement with stopped it -

].

Sn Ce

Ta Pb

Fig. 3. Widths, W{Ey ) of the experimental photoneutron multiplicity distributions as a function of the photon energy E, for 25 MeV s Ey s 140 MeV. Data points were evaluated using resuits from ref. The full line represents a smoothed average behaviour. Fig. 3a: Sn; fig. 3b: Ce; fig. 3c: Ta; fig. 3d: Pb. 74
•

Ce

A=1 33

75
76
A A

P. E. Haustein and A.

J. inorg. me 1. Chem.

METHOD

ELEM. SYM. F. Voigt

33, 289 (1971)

Ce

REr. NO.

A

138

71 Ha 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

G,N RLY 10-70 C 70 ACT -I 4 PI

Isomer ratio = (yield to low spin state)/(yield to high spin state) ISOMER RATIO

f

Table 2. Isomer ratio measurements for M Mo. Ce. and ,4, Nd

Reaction Isomer r /• /• Threshold 4 \A-'n

ratio Target Ground Isomer (MeV) (MeV)

state

"Mo<*r./»l*’Mo 1-92 2 0-15 0* 9a* 1/2-

13-13 16-60

3«y Mo 1*59x0*16 0* 30-72 16-32

'*Ce<-y. Rl'^Ce 3*1 0*

3/2* 11/2*

10-31 15-30

>mCeiy. 1 102012 0* 26-34 13-26

‘•Ndty. a)“'Nd 3*2 20-3 0*

3/2* 11/2*

9-79 15-22

'-Ndly.J/il^'Nd 1 80 2 0-23 0* 23-67 15-17

form N3S-4I8

IR EV. 7-1 4-«4> JSCOMM.0C 2601 0-P6 4 PHOTONUCLEAR DATA SHEET 77

U.3. DEPARTMENT OR COMMERCE

NATIONAL auREAUOF STANDARDS

Ce

A= 1 40

rrA=1 40

79

Ce

A=1 40

J.H. Carver, G.E. Coo

£

3 , T.R. Sherwood

Nuclear Phys. ~7, 4^9 (19^2)

‘.ctnod T 0 MeV electron synchrotron; activation; Nal

Uc.iction I E or A E a d F.

Elem. Sym.

Ce 140

Re:. No.62 Ca 1

58

JHH

J * Notes

ce 140

( T,„i

Ercmss ' 30 Table 1 Isomeric ratios from (y, n) reactions

Residual nucleus

Target

nucleus /. Ground state Metastable state

Inter- mediate

state

Isomer ratio YilWt+Yt) <7

Spin Half-life Spin Half-life Spin

Co" }- Co" 2+ 71.3 d 5* 9.2 h 0.44 ±0.02 3.2 ±0.2 Ge" 0* Ge" *- 82 min i

49 s 0.48 ±0.07 2.8 ±0.5 Br" Br" 18 min 5- 4.4 h 2- 0.32 ±0.02 6.5 ±1.0 Sr" 0* Sr" l + 64 d i- 70 min 0.36±0.07 2.2 ±0.4 Zr" 0+ Zr" i* 79 h i- 4.4 min 0.33±0.I0 2.8 ±0.7 Mo" 0 Mo" r 15.7 min 66 s 0.46 ±0.04 Ag«" *- Ag1 " 1+ 24 min 9 8.3 d 0.04 ±0.02 2.0 ±0.3

In1 " ! In1 " i+ 14.5 min 4+ 20.7 min 7- 0.8±0.1 3.1 ±0.7 Cd1 " 0+ Cd1 " 53 h 43 d £ 0.2 ^ 3 Cc'" 0* Ce 1 "

i* 140 d 55 s 0.0&±0.01 2.5 ±0.2 Hg‘» 0* Hg"» i- 65 h ** 24 h i- 0.05 ±0.01 3.4±03

»-

Ref. Previous work

Hr" 10) i- Br" I

18 min 5- 4.4 h 3- 0.33 0.5 Sc" '•) 0* Sc" i" 18 min i* 57 min 0.5 3.0 Zr" "» o* Zr" r 79 h i- 4.3 mia 0.44 ±0.06 4.5±1

rn»* a

) !* In 11 * ! 72 s 5* 50 d 3 0.85 5.0 (T* = 2.5 s)

The y kMs y, ami V', arc for (y. n) reactions ending in the isomeric- or ground-state. The yietf'

is for the highirr-spin state. References

1) J. R. Huizenga and R. Vandenbosch. Phys. Rev. 120 (1960) 1305

2) T. Ericson. Advances in Physics 9 (1960) 425

3) D. L. Allan, Nuclear Physics 24 (1961) 274

4) C. T. Hibdon. Phys. Rev-. 114 (1959) 179

5) C. T. Hibdon. Phys. Rev. 122 (1961) 1235

6) T. Ericson, Nuclear Physics 11 (1959) 481

7) J. H. Carver, and G. A. Jones. Nuclear Physics 19 (1960) 184

8) A. C. Douglas and N. MacDonald. Nuclear Physics 13 (1959) 382 9) T. Ericson and V. M. Scrutinslri, Nuclear Physics 8 (1958) 284

10) L. Katz. L. Pease and H. Moody. Can. J. Phys. 30 (1952) 476

11) L. Katz. R. G. Balter and R. Montalbetti, Can. J. Phys. 31 (1953) 250

12) E. Silva and J. Goldemberg. An Acad. Brasil Cience 28 (1956) 275

13) J. H. Carver and D. C. Peaslee. Phys. Rev. 120 (1960) 2155

y 14) J. M. Blatt and V. F. Weisskopf, Theoretical nuclear physic* (John Wiley. New York. 1*>-.

15) S. H. Yegors, L. L. Marsden and R. L. Heath, U. S. Atomic Energy Commission Repo IDO-16370 (1958)

16) Nuclear Data Sheets (National Research Council, Washington. I960) sets 1-5 inclusive

j 17) R. Vandenbosch and J. R. Huizenga. Phys. Rev. 120 (1960) 1313 i 18) E. Weigold and R. N. Glover. Nuclear Physics 32 (1962) 106

19) K. J Le Coutcur and D. W. Lang, Nuclear Physics 13 (1969) 32

20) T. D. Newton. Can. J. Phys. 34 (1956) 804

21) D. W. Lang, Nuclear Physics 26 (1961) 434

22) M. E. Rose. Internal conversion coefficients (North Holland Publ. Co.. Amsterdam.

23) J. Goldemberg and L. Katz, Phys. Rev. 90 (1953) 308NATIONAL BUREAU Of STANDARDS'

po rm NBS-418

le-i-ssi 'JSCOmm-OC 1SSSS-P93 PH0T0NUCLEAR DATA SHEET 81
H. Fuchs, R. Kosiek, U. Mwyer-Berkhout

Z. Physik 166, 590 (1962)

EL EM. S YM. A

Ce 140 58

METHOD

Betatron; neutron yield; radioactivity

REF. MO. 62 Fu 6 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE G,N RLY 5

- 31 C 31 ACT - 1 4-pi

159 nri-g = 3.2 + 0.35, E

Q

= 31 MeV

62

Y(Cu )

Tabelle 2. A usbeutcverhdltnisse fur die Reaktionen am Silber und Cer. £0 ist die Maximalenergie der Bremsstrahlung, YJYt

ist das VerhdUnts dtr Ausbeute der in der

ersten Spalte genannten Reaktion zu der Ausbeute der Reaktion in der zuieiten Spalte

Reaktion 1 Reaktion 2 E. (MeV) v,/y,

Agl07 (y, n) Ag104 * Ag107 (y, rt) Ag104 * ! 34 o.o8 ±0.015 Ag1 ®7 (y, n)Ag'«" Ag107 (y, n) Ag104 * 18 0.06 ±0.010 Ag1 ®7 (y, n) Ag10**4 * Ag‘07 (y.»)Ag»»* 54 1.08 ±0,015

\^m [y.2n) Ag>«* Ag‘07 (y. n) Ag104 * 34 0.12 ±0.06 Ag107 (y.2») Ag104 Ag107 (y.n) Ag104 f 18 0,06 ±0,03

Ag10*(y, ft) Ag10* Ag107 (y. ») Ag104 * 34 0.92 ±0.14

Celt0 (y, n) Ce>3*-< Ce^fy. n) Ce13*t 31 0.193 ±0,014

Ce144

(y, n) Ce11**" Ce140 (y, n) Cc14®* 23.8 | 0.182 ±0.018

FORM NBS-418

(REV. 7-l4>«4)

(JSC OMM.OC M0I0-PS4 PHOTONUCLEaR DATA SHEET 32

'-•S. OE° ARrsiEHT OF COMMERCE

iATiSNAL BUREAU OF STANDARDS
Y. Oka, T. Kato and A. Yaraadera

Bull. Chem. Soc. Japan 41 . ldC'6 (1968)

ELEM. SYM.

Ce 140 53

METHOO REF. NO. 68 Ok 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABY THR-20 C 20 ACT1

4PI

ISOMERIC YIELD

Tabl* 1. Thb PARTICULARS OP THE ()-,n) REACTION products and the data obtained WITH 20 MeV BREMSSTRAHLUNC

Nuclide

Half-life of product

(sec)

Gamma-ray determined

Limit of

detection

(/*g)

Yield (mol-‘-R-')

Parent

(Natural abundance, %)

Residual Energy

(MeV)

Branching

ratio (%)

Photopeak

activity (cpm/mg)»> MMg(78.60) “Mg 9.9 0.511 200 2.04 x 10* 0.49 8.1x10*

T*Ge(7.67) n«Ge 48 0.139 100 6.37x10* 1.6 1.1 xl0« nSc(23.S2) ”“Se 17 0.162 100 1.82x10* 0.55 1.2x 10* **Mo(15.86) "“Mo 65 0.650 57 2.22x 10* 4.5 2.7x 10* “*Ce<88.48) ‘»“Ce 58 0.745 10C 1 .06x 10* 0.95 1.3x 10*

l4*Nd(27. 13) >““Nd 64 0.760 100 3. 19x 10* 3.1 1 .4 X 10* “*Tb(100) luaXb 11 0.111 100 2.56x 10* 3.8 2.2x 10*

a ) The value corrected at the end of one-minute irradiation with the dose rate of

101 R/min; Counting geometry is 20% with a 3‘'dia. X 3"NaI(Tl) detector.

form NBS-418

(R EV. 7.K.UI

'JSCOMM-OC 2901 0-P94 PH0T0NUCLEAR DATA SHEET 83

U.S. DEPARTMENT OF COMMERCE

NATIONAL bureauof standards
REF. K. Shoda, M. Sugawara, T. Saito, and H. Miyase

Phys. Letters 28B , 30 (1968)

ELEM. SYM.

Ce 140 58

METHOO REF. NO. 68 Sh 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE E,P SPC 13-30 D 30 MAG-D 5-15 90

ANALOGUE STATES

Fig. 2. Photoproton cross section for 140Ce calculated from the energy distribution of the £0 = 30.0 MeV bombardment. The scale was constructed under the

assumption that observed protons

correspond to ground- state transitions. The triangles show the en- ergy resolution. The solid curve

is the (YjPo) cross section calculated from the (p,Yo)data.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST ANDARD3 form NBS-418

(REV. 7*1 4* 64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 84
METHOD

K. Shoda, M. Sugawara, T. Saito & H. Miyase

PICNS-69 Proceedings of the Conference on Nuclear Isospin

Asilomar-Pacif ic Grove, California 1969 (Academic Press

New York & London 1969) p. 137.

ELEM. SYM. A

Ce

REF. NO.

140 58

69 Sh 8 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE Ty RE R AN GE L? SPC 13-22 D 20 . 22 MAG-D DST

Table 1-

Fig.

N„

, La

E, = 30MeV

1 /, • V «

6 8 10 12 14 16 A UC

j Hi •

; j

.

, O

E. = 22MeV ’ *• •* tj.

a

6 8 10 ’2 14 15

‘ i i

"

• • v 'l" 4 r I Pr

•V

1 ' * E. = 20MeV

V

Nucleus E (MeV)

P V(Q)

a 1 -a '^Ce 10.3 l+( 0.4+0. l)P

1 -(0.0+0. l)P

2 12.8 l+( 0.2+0. l)P

1 -(0.4+0.2)P

2

"4i

Pr 9- J l+(0. 0+0. 1)

P

1+(0. 1+0. 2)P

2

Nj,

4 6 8 10

i

. i:

12 14

l«4

E. Sm

= 20MeV

16

4 6 8 10 12 14 16 E r (MeV)

t. Energy distributions of photoprotons.

Vertical broken lines and solid lines

indicate the position of p n correj- (over)

ponding to the ground IAS and electric

dipole IAS ( 2 ) . A SHEET 85

u.s. departmentof commerce

NATIONAL 9UREAUOF STANDARDS
22 MeV

Np 1

/

*.!>/ .

<• \W ..

i 2oMev

'+/'*

; \\

\

'•v;

.

V;.

0 2 6 8 JO 12 14

Np

Ee (MeV) 4 8 10 12

E«(MeV) 10 8

Fig. 2, Comparison of energy distributions on

***®Ce irradiated by 20.0 MeV and

22.0 MeV electron beam. The lowest

spectrum is a difference of the two.

Photon spectrum corrospondi ng to this

difference is also shown.

Table 2. The radiative widths of the min IAS. The results are compared with the

single particle strength in W. u.

Nucleus E

? (MeV)

E (a) x —

(MeV)

P /P

Po

P

(eV)

2(T+l) n

y

,

. o (W.u.)

lUC

Ce 10.3 18.3 1 (b) 50 0.

1

- 12.8 20.8 1 (o) 90 0. i 9-7 15.1 12/o0(c) 1+0 0.2

10.

6

16.

6

: (b) 20 0.C5

(a) Ground state is assumed for the residual state.

(b) Assumption.

(c_) P. VonBrentano et al. (2)

.

86
REF.

R. Pitthan

Z. Naturforach. 25a , 1358 (1970)

ELEM. SYM. A

Ce 140 58

method REF. NO.

70 Pi 1 egf

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E,E/ LET 1-4 D 50,60 MAG-D 141

6 LEVELS, J-PI

E,/MeV 1* YDuke I'Vip rr*/eV rr*irw

1.60 V 0,65 0.67 ± 0.05 6.7 10 -* 18 ± 2

2.08 4* 2.20 2227 ± 0,56 1 .5

- 10 -* 21 ±4

2.46 T 1.28 1.31 ± 0.11 6. 210-* 26 ±3

2.90 V 0.29 —

2* 0,65 0.58 ± 0.19 9. 5

- 10— 3 1.3 ± 0,5 3.12 1* 0.29 —

O* 0.65 0.58 ± 0,13 26 - 10- 1 2,6 ± 0.5 3,32 1* 0229 —

2* 0.65 0.73 ± 0,28 19 - 10 -* 1.3 ± 0.6

Tab. 1. Vorlaufigc Ergebnisse. Y i$t das Verhaltnis dcr bei 60 McV und 50 MeV Primarrnergie gemcssenen differrntiel- len Wirkungsquerschnitte (ft-Ml1

). Spin* und Paritaten I* nadi Ref. •. Tw: Wcissknpf-Einhcit (WE) nach Wilkin- son ,J 10 .. H. W. Baer, J.J. Feidy u. M. L. Wiedenbeck, Nucl. Phya.

A113 , 33 (1968).

13

D. H. Wilkinson, in F. Ajzenberg-Selove , Nucl. Spectroscopy, New York und London 1960.

form N3S-418

(R EV. 7-1 4-«4> USCOMM-OC 26010-p«4 PHOTONUCLEAR DATA SHEET 87

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
P. E. Haustein and A. F. Voigt

J. inorg. nucl. Chem. ^3, 289 (1971)

ELEM. SYM.

Ce 140 58

METHOD REF. NO.

71 Ha 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE G,3N RLY 26-70 C 70 ACT -I 4 PI

Isomer ratio = (yield to low spin state)/(yield to high spin state) ISOMER RATIO

Tabic 2. Isomer ratio measurements for •'Mo, l3tCe, and 141 Nd

Reaction Isomer r r r Threshold 4l/t- |,s

ratio Target Ground Isomer (MeV) (MeV)

state

'"Moty, n)*' Mo l-92±0-l5 0*

912* 1/2*

13-13 16-60

M Mo(y, Sn^'Mo 1 592:0-16 0

+ 30-72 16-52

l3*Ce(y, /i) 137Ce 3-1 0*

112* 1 1/2*

10-31 15-30

l40Ce(y, 3/i) ,37Ce 1102: 0-12 0

+ 26-34 15-26

'«Nd(y./i) ,4, Nd 5-2±0-3 0*

112* \\!2*

9-79 15-22

144 Nd(y, 3n) ,4l Nd 1 -80 ±0-25 0* 23-67 15-17

form N3S-418

(R EV. 7-1 4-64) USCOMM-DC 26010-P64 PH0T0NUCLEAR DATA SHEET 88

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. K. Shoda, T. Salto, M. Sugawara, H. Miyase, S. Oikawa, A. Suzuki

Phya. Rev. C4, 1842 (1971.)

ELEM. SYM. A

Ce 140 58

METHOD

71 Sh 3 hmg

REACTION RESULT

EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE

E.P ABX 15-22 D 23 MAG-D 90

The energy distributions of protons from the ( e.e'p) reaction on .V = 32 nuclei with even Z

aave oce.: measured. The cross sections of the (y,Po*p|) reaction have been estimated. Two

prominent isobanc analogs have been found in each nucleus. The results wore used for the systematic discussion o: the odd-odd parent nuclei IMC3, U0La, 14: Pr, and The 1“

states are estimated at 300 and -2500 kcV for lMCs. 500 and 3000 keV for U0 La, 1100 and

3700 koV for u‘Pr. and 1-iOO and 4300 keV for IM Pra. The parameters of these states are dis- cussed in terms of a quasiproton and single-neutron model.

ISOBARIC ANALOGS

.o< *

J8_do

C.5-

1 -

'**4 "w\

Ee* 23.0

a- i

. r2l I 140, '4 Ce

E*>23.0 Me/

V»

* 'ht.tif i V -22.5 MeV

”Vs» , Sm

£,-2!.5 MeV v. % 4 »

•*V

riG.

4 6 s lO 12 :4 16 PROTON f^epgy (MeV)

1. Energy distributions of protons emitted from

the t.e'pi reaction at 9» 90*.

14 15 18

1 20 ’ 22 E* (MeV)

FIG. 2. The photoproton cross sections for p 0 - p , at 9*90* in the vicinity of the isobaric analog resonances. The curves for the broad resonances were obtained from

the Sttlng of the interference formula.

(over)

FORM NBS-418

(R EV. 7-! 4-64) USCOMM-OC 2601O-P64 PHOTONUCLEAR DATA SHEET 89

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
E r (MeV)

FIG. 5. The proton groups emitted through the isobaric analogs at 20.8 MeV in U5Ce and at 20.3 MeV in l;J Na. The energies of the residual states are also indicated by

90
neF. Rainer Pitthan

Z. Physik 260, 283 (1973)

ELEM. STM.

Ge

A

140

z

58

method REF. NO.

73 Pi 3 egf

REACTION RESULT excitation ENERGY

SOURCE detector

TYPE RANGE type RAMIE ANGLE

E,E/ LPT 1- 3 D 50, 65 MAG-D dst

2+, 3-. 4+ LEVELS

Tabelle 2. MeSergcbnisse der untersuchten Kemniveaus in Ce. Die BAVerte sind die B(EX, i/ = 0, 0^ — **), vgl. [1], Weisskopfeinhciten rw fur die Ergebnisse dicscr Arbeit nach Wilkinson, D. H. (in: Nuclear Spectroscopy, ed. F. Ajzenberg-Selove,

New York und London 1960) tnit B=l,2fm; die zitierten Werte anderer Autonen

weichcn davon bis zu 3% ab

Isotop NleV B(El 0)

fraJi r?

eV

r?/r,v Andere

Autoren r?irw

Theoret. Werte r?irw

l40Ce *1 1,60 2,7- 103 4,6 • 10-3

12,5 ±

3 16,0+ 2,5 1 13,0° 12,5+ l,8 b 12,5 t

8,3 ± 0,8 d 15,0* K 2,46 2,0 • 105 6,4 • 10“« 24 ±

3 93 +(30-45)° 6,7 « 6,0 + 0.6 11 V 2,08 5,9 • 106 5,4- 10-11 20+4 5,5 + 0,6 d

142Ce 2* 0,64 6,5 • 103 1.1 • 10-5 30 +15 19,5 + 0,5 b 35,

0

f

3,- 1,65 9,0 103 1,3 • 10_a 110 +40 135 +70°

V 1.22 1.3 • 107 9,7 - 10-13 45 ±25

» Ofer, S., Schwarzschild, A.: Phys. Rev. 116, 725 (1959).

b Eccleshall, D„ Yates, M. J. L.. Simpson, J. J.: Nucl. Phys. 78, 431 (1966).

e Ref. (21J. “ Ref. (241.

• Ref. [271.

' Ref. [291.

* Ref. [28],

21Hansen, 0., Nathan, N.: Nucl, Phys. 42, 197 (1963).

24

Baker, P.T. , Tickle, R. S. : Phys, Lett. 32B, 47 (1970). Die Uberg'inge sind

zitiert nach: Baer,H.W. , Griff in, H. G. , Gray, W. S. : Phys. Rev. C3, 1398 (1971),

denn die Autoren selbst geben keine Zahlen an. Rho ,M. : Nucl. Phys. 65, 497 (1965).

28

Waroquier.M. , Heyde.K. : Nucl. Phys. A164, 113 (1971).

29

Mustafa, S.M. : Nucl. Phys. A185 , 309 (1972).

form NSS-418

IB CV. 7- 1 *-«4l VJSC OMM-N 65-0 C PHOTONUCLEAR DATA SHEET 91

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS
REF.

METHOD

J. Tenenbaum, R. Moreh, and A. Nucl. Phys. A218 . 95 (1974)

Nof

EL EM. SYM.

Ge 140 58

REF. NO.

74 Te 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.G LFT 5 D 4-8 SCD-D DST

5=5. 66

Table 2 Measured angular distribution coefficients A2 . the ratios .Vjj/VVj. , the spins and parities of the ground

and the resonance levels, Jo" and J,"

,

and the character of the ground state transition

Scatterer E7 (keV) ^2 *I|AYl Jo" J," Transition

33 Mn 7491 0.01 ±0.02 1.00±0.02 i- $

1 *°Ce 5660 0.51 ±0.02 1.14±0.04 0* 1- El

‘*‘Pr 6877 0.11 ±0.02 0.95 ±0.03 i* i* Ml

**3 Nd 6877 0.51 ±0.03 1.10±0.04 0* 1- El

201 Hg 4922 0.51 ±0.02 1.1 8 ±0.03 0* 1- El

J09 Bj 5603 0.06±0.02 0.97 ±0.02 1- Ml

Table 4

Values of r, A and the energy separation <5 (between the incident '/-line and the resonance level) as obtained from the analysis of the various experiments

Scatterer A(keV) r

(meV)

A

(meV)

<5 (eV) O

(eV) At An

(10-®MeV“ J

) (IO-’McV* 1 )

33 Mn 7491 450±250 80 ± 40 17 ±1

140Ce •) 5660 I3± 3 12± 2 4.7±0.3 6800 0.33 **'Pr •) 6877 85 ± 35 17± 9 6.7+1.5 450 116 ““Nd ) 6877 340 ± 40 270 ± 20 12.4±0.3 1200 26

I0IHg 4922 300± 50 260± 20 4.2 ±0.5 19000 3.4 J0*Bi ) 5603 950±200 950±200 13 ±1 34000 160

The radiative strengths At and Kul are also given. The level spacing D refers to the excitation energy of the resonance level Ev . *) These values are slightly different from those of ref. *) and were obtained from a renewed

analysis of the experimental results. 8

A. Wolf, R. Moreh, A. Nof, 0. Shahal, J. Tenenbaum,

Phys. Rev. 05, 2276 (1972).

form N3S-418

(REV, 7-1 4-64) USCOMM.QC 2C010-P64 PHOTONUCLEAR DATA SHEET 92

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
c, e p R.M. Laszewski, R.J. Holt, and H.E. Jackson

Phys. Rev. C13 , 2257 (1976)

ELEM. SYM.

Ce 140 58

REF. NO. 76 La 4 hmg

EXCITATION ENERGY

SOURCE OETECTOR

REACTION result

TYPE RANGE TYPE RANGE ANGLE

G,N RLX 9 C 9 TOF-D DST

(9.203)

*

THRESHOLD MEAS

The lt*C e(y , n) ,3,Ce reaction been studied near threshold with high energy resolution. The angular distribution of photoneutrons was measured at 90* and 135*, and the Mi and £1

strength functions at an excitation of approximate!y 9.1 MeV were determined. The measured integrated Ml strength was found to be consistent with the existence of a giant M

1

resonance centered at 8.7 MeV as suggested both by calculation and previous electron scattering data. The Integrated £1 strength was also found to be consistent with what is known

of the £1 strength function in the threshold region.

TABLE II. MX and £l ground-state transition strengths

Integrated over the 40-keV interval centered at 9.08 MeV.

Statistical uncertainties are estimated to be of the order

1*1. Possible systematic uncertainties of the order 10%

are estimated as discussed in the text.

Transitions £rT ,(Af(£)l) B (t,A/(£)l) Sa(£) ,

Afl 1.1 eV °- 39 fe) 37 X10'3 £1 1.7 eV 6.6 xlO-3 t

2 fm2 2.2 xl0" s

'o»u NSS-4 18 !P£v. 7-1 4- 64) JSC OMM-N BS-O C

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 93
ref. A. Lepretre, H. Beil, R. Bergere, P. Carlos, J. Fagot,

A. De Miniac, A. Veyssiere, H. Miyase

Nucl . Phys. A258, 350 (1976)

ELEM. SYM.

Ce

A

140

z

58

METHOD REF. NO. 76 Le 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,N ABX 8- 26 D 8- 26 MOD-I 4PI

G,2N ABX 16- 26 D 8- 26 MOD-I 4PT

- -a^w | | a l |

l 1 1

|

l 1 |

1 • 1 rTf-hi rt 1014+

Fig. 5. Partial photoneutron cross sections [a(y, a)+a(y, pn)] and a(y, 2a) for “°Ce. Arrows 5.

and BtM indicate theoretical threshold values for (y, n) and (y, 2n) reactions respectively.

Table 3

Lorentz line parameters corresponding to best fits shown in figs. 9 and 10

Nucleus 124Te ,J8Te ,2 *Te u°Te ““Co ,4JCe

<Ji (mb) 281 ±15 294±15 304±15 318±16 384±20 332±17

A (MeV) 5.5 ±0.2 5.6±0.2 5.4±0.2 5.1 ±0.2 4.4 ±0.1 5.2 ±0.2

Et (MeV) 15.2 ±0.1 15.1 ±0.1 15.1 ±0.1 15.1 ±0.1 15.0±0.1 14.9 ±0.1

form N3S-418

(REV. 7-1 4-S4) USC OMM-N BS-O C

Table 4

Integrated photoneutron cross sections and comparison with sum rules

Nucleus tJ4Te 1MTe lI *Te I,0Te “°Ce i«Ce

Eh (MeV) 26.5 25.1 26.2 25.9 26.5 23.5

<70 (MeV • b) 2.04 2.04 2.11 2.19 2.40 2A1

a0A

1.12 1.11 1.14 1.17 1.18 1.07 0.06 NZ

o'* (MeV • b) 2.44 2.56 2.58 2.55 2.65 2.69

a*oA

1.34 1.39 1.39 1.36 1.30 1.30 0.06 NZ

<r_t (mb) 128 130 135 140 154 149 ir.M'l (mb) 0.21 0.20 0.21 0.21 0.21 0.20

<*-a (mb • MeV* 1 ) 8.4 8.6 9.1 9.4 10.3 10.6

(jib • MeV-1

) 2.7 2.7 2.8 2.8 2.7 2.7

The notation used is defined in the text. The average experimental errors Aa„lo0, Ao.Jo.i and PHI Aa.iJa.i are approximately 8%. g^
*er. D. Meuer, G. Kiihner, S. Muller, A. Richter, E. W. Knupfer

Phys. Lett. 106B, 289 (1981)

method

Spamer, 0. Titze, ELEM. SYM.

Ce 140 58

REF. NO.

81 Me 2 hg

REACTION nESULT EXCITATION ENENOY

SOURCE OETECTOR

ANGLE

TVP« NAN GC TYPE MANSI E,E/ ABX 6-11 D 30-50 MAG-D DST

-

A broad structure at £x » 9 MeV in 140 Ce which hitherto had been interpreted as the Ml giant resonance is shown to

consist of an accumulation of J" = T states with a total strength of about 6 X 103 «^fm:

. There is no indication of an Ml

gunt resonance in the energy region Ex » 7.5—10 MeV, contrary to a recent theoretical prediction.

Fig. 1. Spectra of indasttcally scattered electrons on

l40 Ce

without the background subtracted.

Fig. 2. Comparison of the experimental form factor for the broad structure between £\ * 7.5- 10 MeV in fig. 1 (open

symbols with error bars) and DWBA form factors in the frame

of the RPA-MSI. The data definitely rule out an Ml form factor since its shape and relative magnitude between different angles disagrees with the data.

'OHM N8S-4II

in iv. m.mi

use OMWNIMC PHOTOMUCLEAR DATA SHEET 95

U.S. DEPARTMENT or COMMERCE

NATIONAL. BUR K A U OP STANOAROS
‘
'

97
.

.

'

98
ref. I. Bergqvist, 3. Palsson, L. Nilsson, A. Lindholm, D.M.

E. Arthur, D.K. McDaniels and P. Varghese

Nucl . Phys. A295, 256 (1978)

method

Drake EL EM. $YM. A

Ce 141 58

REF. NO.

78 Be 1 rs

REACTION EXCITATION ENERGY

SOURCE DETECTOR

RESULT ANGLE

TYPE (RANGE TYPE RANGE

N.G ABX 11- 21 D 6-16 NAI-D 90

-

Fig. 2. Comparison of the measured spectra from neutron capture in cerium and those predicted from

the DSD capture theory. The single-particle level scheme for

14, Ce is shown because ,4°Ce is the dominant isotope (88.5 */,). The binding energies of single-particle levels in ,4J Ce are about the same

except for the 2f7(2 state (see text and table I). The observed and theoretical spectra were normalized to each other in the region corresponding to excitation energies below 2.6 MeV in '“Ce. The infraction parameters chosen were r, » 75 MeV and w, = 115 MeV. (For further notation, see caption to fig. I.)

over

rosu N8S-41*

in K v . 7-I4.WI USCOMM-N1S-OC PHOTONUCLEAR DATA SHEET 99

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Fig. 4. Experimental (n.y)cross sections for y-ray transitions to the 2f- ,statcsin , 'M Ce«£B

=* 5.44 MeV)

and ,i3 Ce (£B = 5.15 MeV), and the integrated cross section for -/-ray transitions to levels in the regions corresponding to excitation energies below 3.5 MeV in ‘"“Ce. (For further notation, see caption to fig 3.)

100
Ce

A=142

i

Ce

A=142

A=1 42

101

.'i . jc.^er. J. Halpern, ar.d E. G. Muirnead

Pays. .tev. .13 . 1302-12 (i960)

tL. c.M. STM. »

Ce 142 58

METHOO

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE N ANSI G,N N0X THR C THR BF3-1 4 PI

THRESHOLD

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.

Kmet inn No. runs i'rescnl results Other results Method Reference

Ce^fy.nlCe1" 1 ^ 7.24 ±0.07 6.97 ±0.07 mass data p

» W. H. Johnson. Jr- and A. O. Nier. Phya Rev. 105. 1014 0957).

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 AT* Observed threshold Mass data Q value Ea-Q Excited state energy

Cr*»(7ln)Cr« 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" 0.063=0.41 0.387*

In'"t7 ,»«)In“* 7/2 9.22±O.OJ 9.35 ±0.43* —0.13±0.43 0.191* Ce^b.nlCe1" (7/2)* 7.24±0.07 6.97 ±0.07' 0.27±0.10 Nd^fy.NlNd14* 7/2 6.38±0.16 5.97 =0.19' 0.41=0.25 0.690* Smla

( 7 p»)Sm“* 7/2 6.4S±0.16 5.87 ±0.28' 0.58±0.33 0.562* Er^fy.nlEr*** 7/2 6.65±0.08 6.45 ±0.06* 0.20±0 10 0.081* H^7,

( 7 ,»)HP, • 7/2 6.69±0.03 6.28 ±0.06* 0.64±0.07 0.088* Hf,,

( 7>*)Hf1, • 9/2 6.31±0.07 6.17 ±0.06* 0.14±0.09 0.093* Hf'Rfy.alHPTM 9/2 7.85±0.11 7.32 ±0.06* 0.53±0.13 0.375*

• D. Strominger. J. M. Hollander, and G. T. Seaborn. Rev*. Modern Phyt. 30. 585 (1958). »C. F. Giese and J. L. Benson. Phy». Rev. 110. 712 (1958).

• Henry E. Duckworth. Mass Spsciroscopy (Cambridge University Pre*. New York. 1958). p. 177.

« S. Dielepov and L. K. Peker, Atomic Energy of Canada Limited Report Tr. AECL-457 (unpublished).

• The discrepancy in the case of Ceia predicts a ground-state spin for Ce** of 0, since the spin of Ce*41 is known to be 7/2.

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

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

* N BS* 4 1

8

-.1 4-441;sni&.rsi

U.S. DEPARTMENT OF C OMMERCE

NATIONAL 0URSAUOF *NOAROJ

PHOTONUCLcAS DATA SHEET 103
EL EM. SYM.

Ce 142 58

REF. NO. 73 Pi 3 egf

Rainer Pitthan

Z. Fhysik 260, 283 (1973)

method

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE range

B.E/ LET 0- 2 D 50, 65 MAG-D DST

2+. 3-, 44- LEVELS

Tabellc 2. MeQergcbnissc der untersuchten Kemniveaus in Ce. Die B- Werte sind die B(EX, <?=0, 0+ vgi. [1], WeissIcopfeinheiten rw fur die Ergebnisse dieser Arbeit nach Wilkinson, D. H. (in: Nuclear Spectroscopy, ed. F. Ajzenberg-Selove, New York und London 1960) mit R= 1,2 fm; die zitierten Werte anderer Autoren

weichen davon bis zu 3% ab

Isotop E*MeV

B(EX, 0) fm22 r?

eV

r?trw Andere

Autoren r?irw

Theoret. Werte r?!rw

140Ce 2 1,60 2,7 • 103 4,6 • 10“3 12,5 ±

2 16,0+2,5* 13,0®

12,5 ± 1,8 s 12,5'

8,3 ± 0,8 s 15,0 • 3f 2,46 2,0 • 1

0

s 6,4 • 10“« 24 ±3 93 ±(30-45)® 6,7*

6,0 + 0,6“

<t+ 2,08 5,9 • 10* 5,4 - 10“ 11 20 ±4 5,5 ±0,6“

l42Ce 2j+ 0,64 6,5 • 103

1,1 • 10“5 30 ±15 19,5 + 0,5 b 35,0*

3 r 1,65 9,0 • 105 1,8 • 10“« 110 +40 135 ±70®

1,22 1,3 • 107 9,7- 10“ 13 45 ±25

* Ofer, S., Schwarzschild, A.: Phys. Rev. 116, 725 (1959). b Eccleshail, D., Yates, M. J. L., Simpson, J. J.: Nucl. Phys. 78, 481 (1966).

® Ref. [21]. d Ref. [24].

8 Ref. [27],

* Ref. [29], * Ref. [28]. 2*Hanaen,0. , Nathan, N. : Nucl. Ibya. 42, 197 (1963).

24

Baker,?. T. , Tickle, R.S. : ?hys. Lett. 32B , 47 (1970). Die Ubergange alnd

xltlert nach: Baar,H.W. , Griffin.H. C. , Gray, W. S. : Phya. Rev. C3, 1398 (1971),

denn die Autoren selbat geben kelne Zahlen an. 27

Rho,M. : Nucl. Ibya. $3, 497 (1963).

^Maroquler.M. , Heyde.K. : Nucl. Phya. A164 . 113 (1971).

29

Muatafa,S.M. : Nucl. Phya. A183 . 309 (1972).

form N3S-418

(REV. 7-14-64) USCOMM-NBS-OC PHOTOHUCLEAR DATA SHEET 104

U.S. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDAROS
REF. A. Lepretre, H. Beil, R. Bergere

A. De Miniac, A. Veyssiere, H. Nucl. Phys. A258, 350 (1976)

P. Carlos, J. Fagot,

Miyase

ELEM. SYM.

Ce

A

142

z

58

method REF. no.

76 Le 2 egf

excitation SOURCE OETECTOR

REACTION RESUL T ENERGY TYPE range TYPE RANGE ANGLE

G,N ABX 8- 20 D 8- 26 MOD1

4PI

G,2N ABX 12- 24 D 8- 26 MOD—

I

4PI

350

300

230

200

1017+

Fig. 6. Partial photonemron cron sections [a(y, n)+o(y, pn)J and a(y, 2n) for l4,Ce. Arrows Bu and 3lm indicate theoretical threshold values for (y, n) and (y, 2n) reactions respectively. Data are not corrected for impurities.

Table 3

Lorentz line parameters corresponding to best fits shown in figs. 9 and 10

Nucleus ,,4Te ,MTe ,a *Te 110Te ,4#Ce 14, Ce

at (mb) 281 ±15 294±15 304±15 318±16 384±20 332± 17 r, (MeV) 5.5 ±0.2 5.6 ±0.2 5.4 ±0.2 5.1 ±0.2 4.4 ±0.1 5.2 ±0.2 (MeV) 15.2±0.1 15.1 ±0.1 15.1 ±0.1 15.1 ±0.1 15.0±0.1 14.9±0.1

Tabu 4

Integrated photoneutron cron sections and comparison with sum rules

Nucleus l,4Te «>*T0

lJ *Te «s°Te 140Ce ,4,Ce

Ett (MeV) 26.5 25.1 26.2 25.9 26.5 23.5

<r, (MeV • b) 2.04 2.04 2.11 2.19 2.40 121

o9 A

1.12 1.11 1.14 1.17 1.18 1.07 0.06 HZ

(j'o (MeV • b) 2.44 2.56 2.58 2.55 2.65 2.69 oA

0.06 NZ 1.34 1.39 1.39 1.36 1.30 1.30 a. i (mb) 128 130 135 140 154 149

<r_ i/t'» (mb) 0.21 0.20 0.21 0.21 0.21 0.20

(mb- MeV-*) 8.4 8.6 9.1 9.4 10.3 10.6 <r_iA~*

(pb- MeV-*) 2.7 2.7 2.8 2.8 2.7 2.7

Ve’T* The notation used is defined in the text. The average experimental errors and uscommInb’Ioc PHC *'-•/*-* approximately 8%. 1Q5
-
n

R

A-141

PRASEODYMIUM

Z=59

Praseodymium was discovered by C. A. von Welsbach in 1885 by

separating from a green salt(didymi urn) the fractions of

praseodymium and neodymium. The name is a shortened variant

of the word praeseodidymi urn meaning green didymium.

Welsbach invented the automatic gas lighter based on a pyrophoric alloy of cerium and iron. He also invented the

first lightbulb that used a metallic fi 1 ament (osmium)

.

Welsbach is best remembered for his invention of the n incandescent gas mantel a truly great advance in the

history of illumination. A=141

n

A=141

107
108
3.G. Chidley, L. Katz, S. Kowalski

Can. J. Phys. , kOJ (1958)

ELEM. SVM. : A

Pr lU 59

Betatron

REF. NO.

58 Ch 2 NVB

REACTION RESULT EXCITATION ENEROV

SOURCE OET ECTOR

ANGLE TYPE RAN6C type nance G,N RLY THR C THR 3F3-I 4-PI

See 58 Ka 1 for cross sections

TABLE I THRESHOLD

Measured thotoneutron thresholds

Measured Ocher Q value*, Reaction Q value, Mev. Mcv. Method Reference

Pr‘“<T. »)Pr14* 0 .40=0.05

9.40 =0.10

9.8 =0.3

9.30 =0.00

Threshold

Threshold Mass data

Hanson et al. (1949) Ogle el al. ( 1950) Johnson and Xier (1957)

TABLE II Comparison- of thresholds from mass data and from photoneutron reactions

Reaction Photoneutron

threshold, Mcv. Mass data

threshold, Mcv

DifTcrence, Mcv. Xaa

(y, «)Xa“

Ai”(y, n)AI>‘ P'Kt, «)P"

Co**(y, «)Co“

Prul

(y, n)Pr‘«

12 47=0 do

12 . '.n.=u 0i> 12 18=0.05

10 44=0.05

9 46=0 05

12.417=0.0.-,

13.03 =0.00

12 39 =0.03

10.4!) =0.01

9.30 =0.00

-0.05=0.05

-r0. 07 =0.08

-0.09=0.06

4-0.05=0.05 -0. 16=0 08

... N3S-41S

' J . ?• » 4-*4l C ?«OIO-P«4

U.S. DEPARTMENT OF Cm NATIONAL BUREAnOr *» ' - PHOTONUCLcm.\ ^.. . ... S.fcST 1Q9
L. Katz, G.B. Chidley

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

USSR: 1958) 371

Pr 141 59

method

getatronj neutron cross section; BF, counters; ion chamber monitor

5

REF. NO. 58 Ka 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 10-22 C 10-22 BF3-I 4PI

3o \

Taoaana 2

Ilopctu ucnycKUHU* tpomoHcumpuHoe

Hsotoo B». Mm Bm, Mm

|| HaoToa . Bn. Mm B«„ Mm

ysi '11.16 20,5 L138 8,81 16,1 Mn58 10.14 19,2 prm 9,46 17,6 Co58 10,44 18,6 I Tb138 8,16 14,8 As78 10.24 18,1

| Ho' 83 8,10 14,6 yso 11,82 20,7 Tm188 8,00 14,7 Nb83 8,86 174 Lu173 7,77 14,2 Rb103 9,46 16,8 Ta181 7,66 13,8

j

127 9,14 16,2 \ Au187 7,96 13.3 Cstu 9,11 16,5

J Bi208 7.43 14,5 T'TTDirctrm nc

ae npnueiioHU, nocHOJibKy ohm npcuhimaiOT 22 Mao bo bcox CJiynanx, i<po\te

30Ji0Ta, JIJIH KOToporo Bj-21 Mao. CBoiicTua cchchhu oc (t) cboachh s Ta6.i .„^.

T a 6 a a a a 1 HMTon 'J

V&i Mn»

Co59 As78 Y8» Nb83 RhiM

J127 Csl33 La138 pri« Tb138 Ho188 Tm188 Lu178 Ta181 Au187 Bi*»

Vh •« (£t

). 6aPM

18,4 20,2

18.3 16.4

17.1 18.0

17.5

15.2

16.5

15.5 15.0

15.6

13,5

16.4 16.0 14.5

13,8 13.2

0.062

0.060

0,068 0,090

0,172

0.156 0,160

0,273

0,238 0,325

0,320

0,274

0,305 0,250

0,225 0,380

0,475

0,455

;r, mu

5.2

7.0

6.3

9.5

5.2

7.5

9.4

6,8 7.7

3.8

4.9 9.8

8.9

8.4

8.4

8.5

4,7

5.9

t«, Mm • 6a pH

0,33

0,39 0,44

0,74

0,93

1.17 1,40

1,76

1,59

1,55

1.93 2,49 2,52

1,91 1,90 3,15

3,04

2,89

„ r<22>* 10* N«ampoH/100 p>Mu

1,62

2.01 2,30

4,25

5,33 6,80

8,28

11.9 10.7 11,2

13.1

18.1 18.7 14.9 23.0

22.0

22,6 23,2

FORM N3S-413

£V. 7.U-MI PHOTONUCLEAR DATA SHEET 110

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUR VAU OF tTANDAROS
***• J.H. Carver, W. Turchinetz

Proc. Phys. Soc. 73. 110 (1959)

Elem. Sym.

Pr 141 59

Method 33 MeV electron synchrotron; neutron yield; radioactivity

kef. No. 59 Ca 2 EH

Reaction E or AE <7d E J n Notes +

Pr

141

(Y,n) Bremss

PrlU(y,2n)

33

31

} J

= 2.6±0.4

MeV-b *th(7,2n)

= 18.3 MeV.

Cross sections for the reactions: A.

' 4, Pr(y, n); B. l4l Pr(y, 2n); C, che activation curve for

,4l Pr (y, 2n).

li.S. OCRARTWENT OP COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

( 8 - 1 - 03 ) USCOMM-OC 190B0-P63 PHOTONUCLEAR DATA SHEET 111
Ret. J.H. Carver, W. Turchinetz

Proc. Phys. Soc. £5, 69 (1959)

Elem. Sym.

Pr 141 59

Method Ref. No. 33 MeV synchrotron; radioactivity; Nal spectrometer; r chamber

59 Ca 3 EH

Reaction E or AE <7d E J

tr Notes a ^8

Pr

124-1 (Y,n) Bremss.

10-32 15.5 J+.3 MeV 2.2±0.3 MeV-b

Figure 7. A, the rano of activation curves u'Pr(y.nl- l, 'Ta(y,n), B, activation curve

for '“Prty,!!); C, derived croea section: ‘“Priy.n). Table 2

Activity Tj (nun) IV, (Mev) K/fl* K-capcure

Total capture IFk

-

‘"Pr 3-4 3-25 0-63 0-89 0-89

l41 Nd 150 1-80 48 0-89 0-90 ‘"Sm 8-5 3-47 0-60 0-89 0-91

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

( 8* 1.631 U3COMM*OC 18SS6-P63 PHOTONUCLEAR DATA SHEET 112
ref. G. Di Caporiacco, M. Mando, and F. Nuovo Cimento _1^3, 522 ( 1959)

method — • ”

Ferrero

59

Betatron; ion chamber

59 Di 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE G,N RLY 9-30 C 30 ACTI

4PI

1 41 Pr(y,n)

Yield ratio: = 3.79

S3 Cu(y,n)

REL T0 CU63 (G.N )

form NBS-418

IR BV. 7- 1 4-64) U3COMM-OC 2a010-P«4 PHOTONUCLEAR DATA SHEET 113

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREALOF STANDARDS
Ret. F. Ferrero, R. Malvano, E. Silva

Nuclear Phys. 10, 425 (1959)

Elem. Sym.

Pr

Ref. No.

59 Fe 2

l4l 59

Method 51 MeV Betatron; radioactivity

EH

Reaction E or AH <7d E J

rr Notes

(Tj.n)

(7,2n)

30

Fig. 3. Comparison between the statistical theory of nuclear reactions (theoretical) and the experimental ratio o(y, n )l

roly. n)+<r(y. 2n)].

E th = 9-5 MeV

Eth = 16.5 MeV

[Erratum in 6l Bo 2; see figures 1 and

2 below of 6l Bo 2]

FIGURES FROM 6l Bo 2:

Fig. 2. Theoretical and experimental curves ot the (y. 2n)/(y, n) -f- (y, 2n) ratio.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

form NBS-418

(0-1-63) USCOMM-DC 18S96-P63 PHOTONUCLEAR DATA SHEET 114
• -r> - • REF - K.N. Geller, J. Halpern, E.G. Muirhead

Phys. Rev. 118 , 1302 (i960 )

EL EM. SYM.

Pr 141 59

METHOO

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^X THR C THR ACT1

4PI

THRESHOLD

Table L Summary and comparison 0/ neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the centcr-of-mass system in Mev,

K,l»ctM»i No. runs Present results Other results Method Reference

Pt*“(71»i)Pr** 4 9.361±0.023 9.30 ±0.06 mass data p

9.46 ±0.05 . threshold f

» W. H. Johnson. Jr- and A. O. Nler, Phya Rev. 10S. 1014 (1957).

form NBS-418

(R SV. 7*1 4*641 U5COMM.OC 26 0 1 0* PS

4

PHOTONUCLEAR DATA SHEET 115

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3UREAUOF STANOAROS
Ref. H.H. Thies, B.M. Spicer

Australian J. Phys. 13, 505 (I960)

Elem. Sym.

Pr l4l 59

Method 18 MeV electron synchrotron; BF^ counters; ion chamber

Ref. No. 60 Th 1 EH

Reaction E or AE

S'

dE J " Notes

__ l4l, Pr (y, xn ) 7-18 15.1 At E = 15.1 MeV, ct =480 mb. n max

Fig. 0 . —Total neutron production cross section for l41 Pr. The points

are obtainod by analysis using tho experimental points. The smooth

curve is obtained by analysis of a smooth yield curve drawn through the experimental points. Table 1 OlANT resonance parameters for non-dkformed nuclei

Nucleus. . 13, La mpr 1,7 Au

Reference Spicer et al. (1958)

Present Paper Fuller and Weiss

(1958)

/; (MeV) 14-9 15-1 13-5

(<*> max. (mbii.-n) 400 480 590 2xT_j (MeV) 4-2 4-4 4 Fg.11. (MeV) 4-2 — 4-2

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(8-1-83) USCOMM-DC 18SS8-PS3 PH0T0NUCLEAR DATA SHEET 116
Ref. 0. Borello, S. Costa, F. Ferrero

Nuclear Phys. 2J, 25 (19^1)

Elem. Sym.

Pr

Ref. No. 61 Bo 1

l4l 59

Method 100 MeV synchrotron; Activation

JHH

Reaction E or $E

$

ad E J w Notes

(Y.ti)

(t,2 q)

10-29

3.0 MeV-mb

|

30

sool

4001

3001

I 200 L

iu 100

I L

L.l'tanWO

lY.nl

20 25 30

This paper is an erratum to results

in Nuclear Phys. 10 423 (1959) [our

file 59Fe2], incorporating a remeasured value of E„C./j3+ ratio in Prl39

= 4.8.

This causes a correction factor to be

applied to the old data:

a(7,n) = 1.02 a(7,n)

[new] [old]

a(Y,2n) = 0-35 0 (7, 2n)

[new] [old]

Fig. 1. The corrected (y. a) and (y. 2a) cross sections. F'S- 2- Theoretical aud experimental curves of the (/. 2n)/(y, n) + (y, 2a) ratio.

1 1 • ‘ porm HBS-418

<8-1-«3> USCOMM-OC 18938-P83

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 117
Ottavia Borello

Rev. Un. Mat. Argent. As.

METHOD

ELEM. SYM. A L

Fis. Argent. 12, 251 (1961) Pr 141 59

REF. NO.

6l Bo 3 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE g,mu-t ABX 11-20 C 11-20 ACT1

Used activity to measure total attenuation.

Tabei.a I

Limiar (Mev)

Energies do Betatron Energies Media

EeagSes Material vida pn pin (Mcv)

(Me») (Mev) (Mev) jm Prm

(<0 Ctt*(7, n) Cu" Ojbre 10,1 10,6 11,4 11,8 11,0 11,2

(b) Fe**(f, n) Fc“ Ferro 9,0 11,9 -i

16,0 — 14,6

(«) 0"(7, n) 0“ Aeido

borico 2,1 15,6 17,4 17,6 16^5 16,1

(d) C"( 7 , n) O' Polic-

' tileno 20,5 18,7 20,3 20,1 19,5 19,6

Tabela II — I

s"

Energia em Mev y, (cm em'/g) a (cm m bams)

11,0 0,0237 i 0,0003 1220 i 15

16,5 0,0235 -a 0,0002 1210 h- 10

19,5 0,0250 *: 0,0003 1287 -*z 15

Tabela III I’rM*

Energies cm

Alev

8(cm bams)

11,2

14.6 16.6

10,6

0,0435 ±. 0,0009 10,19 * 0,21

0,0481 ± 0,0008 H.26 ± 0,19

0,0505 * 0,0008 11,83 — °>19

0,0660 ± Q.OOOS 1 3>°° — 0,12

form NBS-418 (REV. 7-14-64) USCOMM-OC 2601 0-P64 PHOTOHUCLEAR DATA SHEET 118

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ret. G.E. Coote, W.E. Turchinetz, I.F. Wright

Nuclear Phys. 23 , ^68 (1961)

Elem. Sym.

Pr 141 59

Method 7

Li (p,Y) source; activation; Nal

fief. No.

61 Co 2 JHH

Reaction E or AE crd E J 9 Notes

(7,n) a = l8l±20 mb, relative to 59±6 mb

for Cu ^(7, n), measured for MjO keV

(E ) resonance radiation from Li^.

P

form NBS-418

(8*1-63) U3COMM-OC 18698-P63

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST AM OAR 03 PHOTONUCLEAR DATA SHEET H9
Ref. G. Moscati

Nuclear Phys. 26, 321 ( 196 I

)

Hlem. Sym.

Pr 14-1

Ref. No. 61 Mo 1

59

Method 33 MeV bremss. (Saclay Linac); activity measured Nal crystals;

annihilation radiation. EGF

Reaction E or AE ad E J

rr Notes

Pr

lUl

(Y,3n) Bremss.

27-55 1 MeV- mb

E ^

= 26.6±6 MeV [refer Johnson and

Nier, Phys. Rev. 105 , 101^ ( 1957)

]

assumed linear.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(8-1-63) USCOMM-DC 186S6-P63 PHOTONUCLEAR DATA SHEET 120
Ref- V.G. Shevchenko, B.A. Yur'ev

* Zhuf. Eksp. i Teoret. Fiz. 4l, 1^21 (1961)

Soviet Phys. JETP JA, 1015 ][7962)

Elem. Sym.

Pr 1^1 59

Method 55 MeV betatron; emulsions

"kef. No. 61 Sh 2 JHH

Reaction E or ad E J * Notes

Oy,p) Bremss.

22.5 f

55.5 {

6-7

9-10

6-7

9-10

~ 8 X 10 protons/moxe-roentgen

~ 1.5 X 105 protons/mole-roentgen

Angular distributions fitted to: O p

a + b sin“0 (l + p cos 0)

(see Table I parameters)

Conclusion: ^"(7, p) is mostly due

to ) 22 MeV, and is mainly

quadrupole.

*Peaks in proton energy distribution

at 6-7 and 9“ 10 MeV.

(For Figures see page 2)

Tabie L Parameters of type (1) curves approximating the angular distributions of photoprotons from Pr 11

*, and

values of arj/trEt«Ei derived from the vZi/oEi = P

Z/5

E«U<. >«•"

|

Protoo «n«ixy, a ft ?

| 4. 5—7.25 31 15.7 0.42 -3

22.5 7.25—11. 25 44 66 0.32 - 2

1 ill- 25 12 27.5 0.44 ~4

j 4.5—7.25 71 23.4 1.4 —30

53.5 7.25— It. 25 153 57 2.2 —50

1 —I

^11.25 50 71.4 1.8 —40

form NBS-418

(••1*631 USCOMM-OC 18SS6-PQ3

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PH0T0NUCLEAR DATA SHEET 121
R«f- v. G. Shevchenko, B.A. Yur'ev

Zhur. Eksp. i Teoret. Fiz. 41, 1421 (1961)

Soviet Phys. JETP 14., 1015 TT962)

Method

FIG. 2. Energy distribution of photoprotons from Prul produced by radiation having Ey,n ax = 22.5 Mev. The con- tinuous curve 1 is the computed spectrum of evaporation

protons; curve 2 is the computed spectrum of direct-photoeffect protons.cm

mo ^11-

0 30 60 00 <20 ISO too FIG. 4. Angular distribution of 4.5—7.25 Mev photoprotons

(first group); l_for E^.^ 33.5 Mev; 2 -for Eyn,., = 22.5 Mev. The continuous approximating curves have the parameters given in Table I.

Elem. Sym.

Pr 141 59

Ref. No. 61 Sh 2

(PAGE 21

JHH

J n Notes

FIG. 3. Energy distribution of photoprotons from Pr14* produced by radiation having Eymax = 33.5 Mev. The notation

is the same as in Fig. 2.

FIG. 5. Angular distribution of 7.25—11.25 Mev photo- protons (second group): 1-for Ey,,,,,* = 33.5 Mev; 2 -for ^yma« = 22.5 Mev.

form NBS-418

(S-t-«3> USCOMM-OC 18BS6-PS3 PHOTONUCLEAR DATA SHEET 1 22

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
USCOMM-OC 1883«-p«3

PHOTONUCLEAR DATA SHEET 123
Ret

' G.Ben-David (Davis); B. Hueb schmann

Phys. Letters Ji, 87 (1962)

Elem. Sym.

Pr l4l 59

Metho<^n,Y) reaction - Nal(ll)

Ref. No. 62Be2 00-

Reaction E or AE

S

'7 dE J

rr Notes

(Y,Y) discrete

energies

in the

range

5.44 - 8.997

6.12

7.6^

8.881

8.997

o-g (total) (mb)

230

4.0

1

O.ii

Detector at 135°.

y source

Cl

Fe

Cr

Ni

form NBS-418 USCOMM-OC 185BS-PS3

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 124
Ref. W.E. Del Bianco, W.E. Stephens

Phys. Rev. 126. 709 (1962)

Method Electrostatic generator, H^(p,Y)He^ reaction; activation of

Elem. Sytn.

Pr 14-1 59

positron emitter; 2 Nal in coincidence.

Ref. No. 62 De 1 JHH

Reactioo E or AH

s

<76 E J ” Notes

(y> a)

20.4-8 a(7,n) = 51.7±5»4- mb

U.S. department op commerce

NATIONAL. BUREAU OF STANDARD

FORM NBJ-4II

IUICOMM-OC IMM-'M

PHOTONUCLEAR DATA SHEET 125
G.C. Reinhardt, W.D. Whitehead

Nuclear Phys. j>C, 201 (1962)

',i ';thod 55 MeV betatron; synchrotron; Si^(n, p) activity; Cu63(y, n)Cu^2

monitor.

Elem. Sym.

Pr

141

Ref. No.62 Re 1

59

EGF

Reaction E or A E erd E J " Notes

(7,n) Bremss.

55

Figure 9: Dotted curve is of form

2 2 a + a,cos0 + a0 Ol cos 0 + a cos 0 - d C. 2 a^cos 0; solid curve is of form a^ +

2

a^cos0 + a^cos 0; errors on points

are statistical errors in counting

only.

|

' Fig. 9. Angular distribution ol fast neutrons from praseodymium

| Sec fig- 5.

iAULE 2 Parameters of the fit (1) for the expressions a0 -a, cos 0 i-at cos: 0. a — b sin : 0-rc cos 0 and

P, -A t Pt Bid) Bi(2) Pr Au V Ho I -a

a, 1.00£0.02 1 00£0 02 100-O.O2 1. 00-4-0.02 1.00x0.03 1.00x0.02 1.00—0.01

a, 0.15£0 03 0.1S£0 04 0. 17 £0.04 0.14£0 03 0.17 £0.00 0.12x003 O.Ux') 03 -4, 0.47£(MH» 0.40-0 08 0.41 £0 00 0 -21 -0 117 Ol5-fcO.ll 0.34-0 06 0 39-0 or, .1,*) 0.18£0 04 0 21 £0.05 0.20x0.05 0.15x0.04 0 18x0.00' 0 14x0 04 0. HI £ 0. 11:1 —At

*) 0.37 £0 05 0.3l£0 no 0.32x0 07 0.15x0 05 0 11x0-0.8. 0.20x0.05 0.30x0.04

a 0.53x0 00 0 00x0 08 0.59x0.09 0 79x0. 07 0.85x0.11 0 C6£0 00 0 01 — 0 "6

b 0 47x0.06 0 40£0 OS 0.41x0 09 0.21 £0.07 0.15x0 11 0.34 = 0 00 0.39x000

c 0.15£0.03 0 1 8 £ 0 04 0.17x0 04 0 14 £0.03 0.17 £0.06 0.12x0.03 0 14£0 03

*) Renormalized so 1chat .4,-1

Taqls 4 Parameters of the fit v3) for the expressions a „ —at cos 0£fl., cos *0 — a, cos J 0. P3

Ui(l) Bi(2) Pr Au V Ho I-i

a. 1.01-40.02 l.00£0.l»2 1.01x0 03 0.98£0.o2 1.0o = 0.o3 1. 00 x 0.02 1.01 = o 02

a v 0.19 ^D.05 0.17 £0.07 0.21 4 0.07 0.07 -H). 00 O.Hi— O.wu 0. 12 £0.05 0. 17 £0.05 -a, 0.56—0.11 0.37^0.15 0.50£0.16 0.05 £0 12 0.13x0.20 0 33x0 12 0.47x0.11

a, — u.17 £0.18 0.05—0 24 -0.l7xO.25 0.31x0.:L'J O.05£0.32 0 03 = 0.19 — 0. 17 £0.17 A t *) 0.11 £0. 15 0.23±0.18 0.13 £ 0.2U 0.27 rO. 13 O.20£0.22. 0.15£0 14 0.09 = 0.13 -/),*) 0.45J-0.09 02S-0.il 0.39x0.12 0.03x0.0$ 0.00x0.14 0.24 x" 09 0 37 = 0 09 -0.08x009 0.02x0.11 -0.08£0.12 0.13£0 0S 0. 02x0.13/ 0.01x0 08 -0.08x008

•) Renormalized so that = 1 1 form NBS-418 USCOMM-OC 18856-P63 PH0T0NUCLEAR DATA SHEET 126

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref- V.G. Shevchenko, B.A. Yurev

Nuclear Phys, k95 ( 1962 )

Elem. Sym.

Pr

A

lkl

z

59

Method 35 MeV betatron; emulsions

Ref. No. 62 Sh k JHH

Reaction EoriE E

0 r J W Notes

P^^OYjP) Bremss.

22.5

33.5

Parameters a, b and p for

uu(0p) = a + b sin^9 (l+ p cos0)^

in Table I.

vw.'x*/-.-*,

F:,; 3. Er.c.,y !:stnbuc:wiu o: photoprotor.s :rom Prlu .

Coefficients oi expressions 0; :\ r- • „uc;.* ur.a otimatc* oi the

£lenient 2 S. vMeVi a, c-icY) a 4 p 1%)

3.25-9.25 1.9 0 0 0

22.3 Rh 45 > 9.25 2.S 1.9 0.2 l

3515- 9.25 12.2 0 0 0

33.5 > 9.25 4.5 3.7 1.2 .5»20

4.5-7.25 1.4 0.7 0.42 3 22.5 7.25-11.25 2.9 4.4 0.32 2 Pr 59 > 11.25 1.5 3.4 ,1.44

4.5-7.25 3.3 1.2 1.0 ^3 15 35.5 7.25-11.25 4.2 1.55 2.2 50 >11.25 0.3 1.2 l.S 4U

6.25-S.75 u.S u 0 0

22.5 3.73-12.75 2.S 1.6 1.6 35 W 74 > 12.75 2.2 0.5 2.6

6.25-8.75 1.2 0.95 j.44 ,

33.5 3.75-12.75 1.3 «J.S5 2.G 55 > 12.73 0.53 0.5 3.4 5s 70

6.25-S.75 0 0 1.0 0.4 3 22.5 3.75-11.75 2.s 1.9 1.2 ^20

>11.75 1.4 •‘.56 2.6 % 55 ?t 78 i ._5- 1 -».-3 i.! 1.1 J.u ^>55

33.5 > U.25 •) 5 0.® 3.4 5ss 70

22.5 5.25- lo 25 1.05 o 75 u.S 53 10 ?b 52 > i'.‘-5 0.75 •> 75 2.2 5* 50

5.25-10.23 : u 1.2 1.2 5: 20

23.5 *0 25-14.25 1. 15 0.G5 2.0 55 OO >14.25 . 1.5 i 0 3.2 5> 70

T. . ;i

. .. .» Measured photoprocoa yields ::ad CGn;p..;isoii •• C* ON tr.c ir.ouels or evaporation and

.:rect Element £ymit •IoV| v..„ -

....

Ri:J « 22.5 1.3 1>»- 3 3

23.5 2.4 !•>- 4.o

p-i*i >• t * 14 4.5 33.5 1.3. LlP * 25

\V 22.5 1 3 6

Pb - •»

•

.1.2 It.*

1.5

*J The vield Y exposed in proton* yer rnol per A ci.t^ca.

References

?ij. 3. An;u^r distributions oi pnotoprotons from ?r: ** The expo-.mental points :cr *

22.3 MeV are denoted ov solid dots for £, - 4.3-7 25 McV. by centred circle* tor £, - 7.23-

Ll.23 llaV and by crosses for £0 > 11 25 McV. Tor the case o: 2 W - 33.5 McV *oiid squares denote £, — 4.5-7.25 MeV. centred squares £# — 7 25-11.25 McV and centred mangles £f >

11.25 McV.

t porm NBS-418

(8-1-6 3) U3COMM-OC 18096-P63

1) 31. E. Toms and W. Z. Stcpncns. PSiys. Rev. 9S (1955) 426

2) M. M. Hoffman anu A. G. W. Cameron. Phvs. Rev. ‘>2 (1933) 1134

3) W. C. liarocr and V. J. Vannuyso. Nuclear Physic* 16 ilOoO) 3ol

4) M. E. Toms and W. E. Stephens, Pliys. Rev 92 11953) 302

3) E. D. Makhcovsky, JETP 33 (19C0> 93

6) R. 3. Taylor. Nuclear Physics 19 ^19601 453

7) A. G. W. Cameron. W. Harm* and L. Katz. Phvs. Rev. S3 .1351, 12G4

5) V. G. Ncudachin. V. G. Shcvcacako and X. P. Vudin, Report at the Second All- Union Com.

:or Nuclear Reactions at Low and Medium Energies. Moscow, I9o0

9) E. D. Courant. Phys. Rev. 32 ,1951) 703

10) V. V. 3ala*nov. V. G. Shevcncnko and N. P. Vudin. JETP 41 (1901) .929

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 127
B. Arad (Huebschmann) , G. Ben-David (Davis), I. Pelah,

Y. Schlesinger

Phys. Rev. JJ2, B684-700 (1964)

ELEM. SVM. A

Pr 141 59

METHOD

Reactor, (n,y) reactions source

REF. NO. 64 Ar 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G«G ABX 6-9 D 6-9 NAI-D 135

(See Table II

)

Table II. Capture gamma-ray sources and their properties. 1

Source Chemical

composition Mass

kg Principal y rays (in MeV)

Al Metal 1.640 7.73 Cl polyvinyl Chloride 0.380 8.55, Co CoO 0.230 7.49, Cr Metallic powder 0.480 9.72, Cu Metal 1.860 7.91, Fe Metallic powder 0.440 9.30, Hg HguXOus-m-O 0.310 6.44, Mn MnOj 0.240 7.26, Ni Metal 0.900 9.00, Ti TiO, 0.210 6.75, V WO; 0.120 7.30, Y YsO, 0.200 6.07,

7.73, 7.41, 6.96, 6.64, 6.12, 5.72

7.20, 6.98, 6.87, 6.68, 6.48, 5.97, 5.67

8.S8, 8.49, 7.93, 7.09, 6.65, 5.60

7.63, 7.29, 7.14, 7.00, 6.63

7.64. 7.2S, 6.03

6.31, 5.99, 5.67, 5.44

7.15, 7.04, 6.96, 6.79, 6.10, 5.76

S.50, 8.10, 7.83, 7.58, 6.84, 6.64

6.56, 6.42

7.16, 6.86, 6.31, 6.46, 5.S7, 5.73

5.63

‘ For more detailed information. additional lines, intensities, etc., see Ref. 6.

Table III. Effective cross sections.

y source Energy (MeV) Element Protons

Scatterer Neutrons

(v-tt) (mb) Notes Hg 5.44 Hg SO 116, 118, 119, 120, 121, 122, 124 128 Cl 6.12 Pr“* 59 82 103 a V 6.508 Sn SO 62, 64-70, 72 14 Co 6.690 Pr“> 59 82 2.7 a Co 6.867 Nd 60 82, 83, 84, 85, 86, 88 22

Al 6.98 pyxis 82 126 2900 b

Cl 6.98 Pb 82 124, 125, 126 346 a Ti 6.996 Bias 83 126 1560 b Cu 7.01 Sn 50 62 , 64-70, 72 1000 b Ti 7.149 Pb“* 82 126 1000 b Co 7.201 rb“* S2 126 25 Mn 7.261 Pb=°* 82 126 25 a Fe 7.235 Pb20* 82 126 4100 a V 7.305 Pb=M 32 126 12.5 Hg 7.32 Pb 82 124, 125, 126 5500 c Fe 7.639 Ni 28 30, 32, 34, 36 10.5 d Fe 7.639 Pr‘“ 59 82 10 d Cr 3.499 Cu 29 34, 36 24.4 Cr 8.881 Pr‘« 59 82 9.3 Ni 8.997 Sm 62 82, 85-88, 90, 92 2.8

• A large error could be introduced in the cro«s-3ection values because of large differences in line intensities quoted by Bartholomew and Higgs and by

Groshev el al. (Ref. 5). .... ,

. . . t> Because of the low counting rate, thick scatterers were used, which will introduce a systematic error in estimating (tyy) for resonances having a high

nuclear cross section.

• The cross section was evaluated assuming the gamma intensity to be 0.02 photons per 100 captured neutrons (see text).

i Reference 6 gives the 7.639 line of iron capture gamma rays as a single line. However, a recent paper by Fiebiger. Hand, and Segel [Phys. Rev. 12S, 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 is no possibility of deciding which line is responsible for the scattering.

form NBS-418

(rev. 7-14-eai U3COMM.DC 260I0-P64 PHOTONUCLEAR DATA SHEET 128

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. L.B. Rice, L.N. Bolen, W.D. Whitehead

Phys. Rev. 134 . B557 (1964)

ELEM. SYM.

Pr 141 59

METHOD

Synchrotron, MBS chamber

REF. NO. 64 Ri 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,XN ABX 9-30 c 9-30 BF3-1 4PI

5 So

Table I. Experimentally determined parameters for the neutron

photoproduction cross sections <rm, maximum value of cross

sections; Em, energy at which maximum occurs; DSR, classical dipole-sum rule limit ; To twice the energy from half-maximum on

low-energy side of curve to Em, Tu, width used to fit the Lorentz

curve

<Tm mb

Em MeV

/•» adE

Jn, DSR

MeV-b MeV-b

r, MeV

Tlo. MeV

Uncorrected for multiplicity La 315*15 14.8±0.4 1.76 2.02 Pr 303*10 14.8*0.4 1.74 2.06

Corrected for (y,2») La 304 14.5 1.36 2.02 3. 2*0.2 3.3 Pr 305 14.8 1.47 2.06 4.0*0.2 3.3

line in each figure is a result of a Lorentz curve fitting

to the low-lying points on the low-energy side of the

peak.

form NBS-418

IV. 7-1 4.64) USCOMM-DC 26010-P64 PHOTONUCLEAR DATA SHEET 129

U.S. DEPARTMENT OF COMMERCE

NATIONAL aUREAUOP STANDARDS
REF- G. Ben-David, B. Arad. J. Baiderman, and Y. Schlesinger

Phys. Rev. 146. B852 ( 1966)

EL EM. SYM.

Pr

A

141

z

59

METHOO

Nuclear Resonance Scatte“ring using N,G reactions.

REF. NO.

66 Be 3 JDM

reaction RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE PANGS

G 9 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.

Table III. List of effective cross sections.

rhon «J77>

Fig. 5. Integral distribution of the effective cross sections

for the 11 resonances in the mono-isotopic elements lanthanum

and praseodymium.

ronM M05 418

•PC*' ’14 «4» utr r»r PHOTONUCLEAR PAT* SHL

Scatterer Energy Gamma

(MeV) source

t (mb) Energy

Scatterer (MeV) Gamma

source

* (mb) Sm«* 8.997 Ni 100 Sn 7.01 Cu 110 prui 8.881 Cr 9 Nd 6.867 Co 30 La 8.532 Ni 6 Priu 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 8.119 Ni 13 Mo 6.44 Hg 25a 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 Tl 6.41J Ti 25 Cd 7.64 Fe 40* w ~6.3 Ti . . .t» Ni

priu 7.64 Fe T Sb 6.31 Hg

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. IS Gd Mo 7.634 Cu 11 Te 5.8 Ni . . .1 Bi"* 7.634 Cu 4 La 6.12 Cl 35 Te 7.528 Ni 66< pr iu 6.12 Cl 110 Bi** 7.416 Sc 100 Pt 5.99 Hg 40*« Bi** 7.300 Aa 30* Tl 5.99 He 5a Pb“* 7.285 Fe 4100 Pb»* 5.9 Sr . . .a Cl 7.285 Fc 34 Ce 5.646 Co \7 priU 7.185 Se 80 Bi«* 5.646 Co 55 Tl 7.16 Cu 120 Pb** 5.53 70 La 7.15 Mn 50 Hg 5.44 Hg 75a Bi** 7.149 Tl 2000 Hg 4.903 Co 385

•A broad scattered spectram with no observable peak structure. There are actually two lines of energies 7.647 and 7.633 MeV havinc equaj 'ntrrmties i n the iron capture gamma spectrum. The erase section correctcd ' although there is no possibility at present at deciding which line is responsible for each resonance. rays on

> Te!*k y “ iod*°“drnt the complex spectrum at Ni y

• Rough estimate.

' May be inelastic component from 7.528 lerel la Te. eo*rakera

l*tly* “*** tntauiUt* In this case era doe to Grade, and

‘ Nh line is known for the source at thia energy.

Difficult to resolve among the m.ny source lines pnaent at thia energy. 130
CROSS

SECTION

(mb)

rep. R. L. Bramblett, J. T. Caldwell, B. L. Berman, R. R. Harvey

and S. C« Fultz

Phys. Rev. 148, B1198 (1966)

CLEM. STM.

Pr 141 59

METHOO REF. NO. 66 Br 1 JDM

EXCITATION SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE tvpe range ANGLE

G,N ABX THR- 33 O 8- 33 BF3 4PI G.2N ABX THR- 30 D 8- 33 BF3 4PI G , 3N ABX THR- 30 D 8- 33 BF3 4PI

- -

30

f ad* = (2.3 ± 0. 2) MeV b

° Thr T

(G,N) 304 ^

(G,2N) 305

(G,3N) 306->“ (G ,SN) 307

Fig. L. The Prl “(y,rt) cross section obtained using annihilation photons and 4» neutron detector. A multiplitity-of-neutrons counting technique was used to separate the ( 7,n) events iaorn the ( 7, 2*) and ( 7, 3 n) events. ‘The error bars represent only statistical errors measured in standard deviations. The dashed line is an estimate of the systematic uncertainty due

to normalization o£ position and

electron runs.

PHOTON ENERGY (M8V)

I-'tc. 2. The PrIll (y,2/») cross

section.

(over)

FORM N8S-4 18 (REV. 7-1 4-64) USC OMM*N 8S-OC PH0T0NUCLEAR DATA SHEET 131

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU CF STANDAROS
CROSS

SECTION

Imbl

Fig. 4. The photon-absorp-

•na cross section of Pr141

. fjarged particle emission has

neglected so the absorp- “o cross section is the sum

• the (y,n), ( 7,2 n) and (7,3») °»w sections. A Lorentz- ®*P*d curve has been least-

*>*»res adjusted to fit the data *°m 10 to 25 MeV.

Table II. Giant resonance parameters of Prm and Iu,

_.

Parameter Pr141 1“’

Ea (MeV) 15.16±0.08 15.21=0.08

Ei, (MeV) 1.04 Eh

l'a (MeV) 4.49±0.05 4.1 =0 2 Pi (MeV) 7.9 ±1.5

Oa (b) 0.32=0.02 0.18=0.02

<rt (b) 0.05=U.01 r* adE (MeV b) 2.10±0.15 1.79±0.13

Jthre sLold

irffo r/2 (MeV b) 2.27=0.14 l.S =0.2

0.06XZ/A (MeVb) 2,06 1.85 a-dE+ wings* (MeV b' 2.42=0.17 2.09=0.14

Jthre Ahold

•The wing corrections were obtained from the area.' of the Lo-er.:*.- curves winch were adjusted to fit the giant rtfoua'.ce.

132
REF.

B.C. Cook, D.R. Hutchinson, R.C. Waring, J.N. Bradford,

R.G. Johnson, and J„E. Griffin

Phys. Rev. 143. B730 (1966)

method

70 MeV synchrotron

EL EM. SYM. A

Pr 141

REF. NO. 66 Co 3

59

JDM

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABX THR - 65 C THR - 70 ACT -I 4pi

30

f crdE = 1790 ± 100 MeV mb

i : i

;—

r

i i i i i i i 9 S

|* <jdE = 440 MeV mb

3 O

400“

< 300U

I I o ) - 20CV- u

UJ

</>

CO

ino

X° I00[—

Pr (r.n) Pr

500 K£V INCREMENTS

\

• \

28 12 36 4C ENERGY- MEV

I 7 I 52 56 60

1' ig. 1. Cross section for Pr‘‘l (>,;») Pr1- from threshold energy to 65 MeV. The cross-section curve was calculated from yield data taken at 0.500-MeV increments. Horizontal error bars represent full width at half-maximum (FWHM) oi experiment resolution and not uncertainty in energy.

10.0 12.0 1*0 16.0 (8.0 20.0 22.0 24.0 ENERGY-MEV

Fig. 2. Cross section for Prm ( 7,»)Pr 1- from threshold energy to 24 MsV. The cross-section curve was calculated from yield data taken at 0.125-MeV increments. Horizontal error bars represent FWHM of experiment resolution and not uncertainty in energy.

FORM NBS-418

ISIV. 7-14-94) USC OMM.OC 2S0I0-PS4 PHOTONUCLEAR DATA SHEET 133

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3UR6AUOF STANDARDS
REF 'P.H. Cannington, D.G. Owen, R.J.J. Stewart, E. G. Muirneaa, b.M. Spicer

PICNS-67 Contributions, International Conference on Nuclear Structure,

Tokyo, Japan 1967 (institute for Nuclear Study, University of Tokyo,

Tanashi-shi, Tokyo, Japan) 10.15 5 P« 379

Pr 141 59

METHOO

REF. NO.

67 Ca 1 EGF

SOURCE . DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE range

G,N RLX 9-17 C 9-17 ACTI

4P1

CAJ

Experimental Measurements of V ibratiqpal Splitting of the Giant Dipole Resonance*

P. H. Cannington, D. G. Owen, R.J.J. Stewart, E. G. Muirhead and B, M. Spicer

University of Melbourne, Australia

The yield curve for the reaction Zn4,1 (ir,n) has been measured in 0,1 MeV steps from

threshold to 23 MeV, and that for Pr1 * 1 (r,n) has been measured in 0.0S MeV steps firm threshold

to 17. S MeV, In both cases, the positron activity of the residual nucleus was detected by

cotsiting annihilation radiation. The cross sections ware obtained frost the yield curve by the

Laiss-Penfold method.

The crass section far the Zn6

'*('r,n) reaction is shown in Fig. 1, Also shewn art the

predictions of Qreiner^, whose model considers the Goldhaber-Teller type dipole vibration, the

low energy surface vibrations of spherical nuclei, and the coupling of these two vibrations. Dm predictions show only the energy, and integrated absorption cross section for the several

transitions.

The Pr1 * , {y,n) cross section is shown in Fig. 2, and the calculations of HuberJ) are

shown in blocked fomu their detail is the same as above. In this case, the turface vibration phonon energy sms not so easily fixed ae in the case of even A Zn‘*. There were, in

the case of Pr1% * , two possible choices indicated by the low energy spectra of neighbouring

nuclei. The more suitable one is indicated in Fig. 2.

In* both cases, the airouit of structure found experimentally exceeds that predicted by dm

dipole-surface vibration-interference model. However, by worsening the experimental resolution, the agreement can be readily improved. The surplus structure in both cross sections

References! 1) W, Greiner, private oomiuiication (1968),

2) M, Huber, private oormaiicaticn (1966),

FORM NBS-41S

(REV. 7-14-64) U3C OMM-DC 26010* P64 134

3 ARTMENT OF COMMERCE

- 3UREAUOF STANDARDS
EL EM. SYM.

Pr 141 59

REF. NO. 67 Hu 1 EGF

R. R. Hurst and D. J. Donahue

Nucl. Phys. A91 . 365 (1967)

METHOD

Neutron capture gamma rays

REACTION RESULT EXCITATION SOURCE DETECTOR

ENERGY TYPE RANGE TYPE RANGE ANGLE

G,N ABX 10,11 D 10,11 BF3-I 4PI

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 x 0.8 “As 20.4 x 1.7 “Nb 0.53 ± 0.10 14. 6± 2.2 25.8^ 2.1 ‘"Rh 10.6x 1.7 38.8 ± 3.1 “’Ag

| ‘“Ag ) 10.0x 1.5 37.6x 2.9 '“In 17.1 ± 2.6 33.3 ± 2.7 ”'Sb ( '“Sb j

IJ ©’-4 II Ul 42.5 ± 3.6

1J7J 38.7 ± 5.8 38.8- 3.1 '“Cs 31. 7± 4.8 52.5 = 3.8 ‘“La 8.61 ± 0.86 40.8 x 6.5 63.0-^ 5.0 “'Pr 21.5x 3.2 58.3 x 4.1 “'Eu

} 28.9 ± 3.2 '“Eu j 61.3±14.7 102 ±18

‘“Ho 35.6 ± 4.3 92.2 ±27.6 150 -20

“'Ta 4.14±0.36 45.4 i 3.7 65. Ox 5.5 146 x 12 “T Au 44.5 x 3.6 68.4x13.5 160 -15

.°.p b <34.3 238 -29 mpb 22.6 ±11,3 280 ±31

,0*Bi 36.1 ±12.0 226 x27

135

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
P. H. Cannington, R. J. J. Stewart, B. M. Spicer and M. G. Huber

Nucl. Phys. .A109, 385 (1968)

ELEM. SYM.

Pr 141 59

REF. NO.

68 Ca 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N AEX 9-17 C 9-17 ACTI

APT

Excitation Energy (MeV)

Fig. 1. The ul Pr(y, n)U0Pr cross section.

form N8S-418

(REV. 7-14-64) USCOMM-OC 2«010-P«4 PHOTONUCLEAR DATA SHEET 136

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. J. W. Jury. J. S. Hewitt, and K. G. McNeill

Can. J. Phys. £6, 1323 (1968)

EL EM. SYM. A

141 59

METHOO REF. NO.

68 Ju 1 EGF

REACTION RESULT excitation

ENERGY

SOURCE oetector

ANGLE TYPE RANGE TYPE RANGE

G,N NOX THR- 30 C 30 THR 3- DST

W(0) = a + Vl + a

2

P

2

TABLE I

Target element Z Energy <7o* . a i/o0 az ,ao Vanadium 13 32 640 + 50 0.11-0. 10 -0.09-0. 1

1

Chromium 24 22 365 + 39 0.02*0. OS 0.00 + 0. 10 Maneanese 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 Molybdenum 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 I ro - 47 0.06-0.03 -0. 14-0.03

Palladium 46 1350-29 0.26 + 0.02 -0. 12-0.02

Antimony 51

“S -* 2140-62 0.04 + 0.08 -0.25-0.11

Lanthanum 57 27 1940*70 0.12-0. 10 -0.52-0. 14 Praseodymium 59 30 ISOO-58 0.20-0.08 -0.40-0.09

Platinum 78 2J 2600+52 0. 17-0.02 -0. 1 5 ± 0. 03 Lead S2 2274-59 0.08 + 0.03 -0.46 + 0.09

•The yield per mole per 100 r waj normalized (o a yield of 2174 lor the lead sample at the same energy.

FORM N OS-4 18 (Rev. 7-1 4-841 U9C OMM-OC 28010-084J.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARQ3

PHOTONUCLEAR DATA SHEET 137
R. Moreh and M. Friedman

Phys. Letters 26B . 579 (1968)

ELEM. SYM.

Pr 141 59

METHOD REF. NO. 68 Mo 1 EGF

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,G NOX 7 D 7 NAI-D 5-3 90

Compton polarimeter.

Table 1

Properties of levels populated by resonance scattering of Iron capture y rays; Jo and J denote the spins of the ground and resonance levels, respectively.

Scattering ^0 Resonance Resonance N(90,90)/N(90,0) Transition

Isotope level (MeV) spin exp. calc. character

208Pb 0

+ 7.279 1 1.18 * 0.03 1.18 El H2cd <> 7.632 1 0.87 a 0.04 0.83S Ml MlPr ! 7.632 1

1 1.03 * 0.02 1.03 El 62N1 0* 7.646 1 0.88 ± 0.04 0.8SS Ml

203*j*1 JL+

2 7.646 i 1.00 ± 0.01 1.00 -

form NBS-418

(R EV. 7-1 4-«4> USC OMM*OC 26010* P6 4 PHOTONUCLEAR DATA SHEET 138

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. H. Ejiri, P. Richard, S. Ferguson, R. Heffner and D. Perry

Nucl. Phys. A 128 . 388 (1969)

ELEM. SYM.

Pr 141

method REF. NO.

69 Ej 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

P,G ABX 15 D 9-11 SCI- D 6-15 DST

Y(90°)/Y(125°) = 1.18

15=14.95 MEV

Fig. 4. Excitation function of the U0Ce(p, y)

l41 Pr reaction through the 2f-. IA resonance for the two- quanta escape peak of the ground state transition (upper part) and that of the l *°Ce(p, p') U0*Ce

reaction leaving the 4“ particle-hole state at 4 MeV (lower part). Solid lines are calculated ones. For the fit to the (p, p') excitation function, a slight interference effect v/’p. <£ — £) is also used.

FORM NBS-418

IR tv. 7-t 4.04) use omm-oc zaoio-p«4 PHOTONUCLSAR DATA SHEET 139

'J.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
V. E. Michalk and J. A. McIntyre

Nucl. Phys. A137 . 115 (1969)

ELEM. SVM.

Pr 141 59

METHOD REF. NO.

69 Mi 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G,G SPC 6-8 D 6-8 SCD-D 4-8 DST

BRANCHING RATIOS

Tails t Experimental results

Target

(source)

Isotope Levels excited (MeV)Level spin Partial branching

ratio *)

this work

Branching ratio k

)

literature

*)

this work literature

*>

this work literature this work

•)

literature *) this work

Cd(Fe) 112 b

) 112 7.629 4) 7.629 1 °) 1 112 0 0 0 1.000 0.48 ±0.06 “) < 0.574 ±0.011

112 0.62 0.62 2 0.212±0.0U < 0.122 ±0.086

112 1.22 1.22 0(1) 0 0.1 59 ±0.01

3

< 0.092 ±0.009

112 1.86 1.86 0(1) 0 0.371 ±0.019 < 0.2I3±0.01

1

Sn(Cu) 117"*) 113 7.01 d

) 7.01 1 *) 1 118 0 0 0 1.000 < 0.802 ±0.042

118 1.23 1.23 2 0.247 ±0.038 < 0.198 ±0.030

Pr(Cl) 141 6.12 d

) 6.12

141 0 0 1 1.000(1.0)* * < 0.600 ±0.032

141 0.145 0.145 i 0.494 ±0.050(0.42 ±0.04) • < 0.296±0.030

141 1.451 ') 1.46 i

f ) 0.1 73 ±0.045(0. 13 ±0.04)* < 0.104 ±0.025

Pr(Fe) 141 7.629 d

) 7.629 I')

141 0 0 1 (10)* 0.48 r ) 141 0.145 0.145 i (0.2 ±0.1)* 0.075 r

) 141 1.13 1.13 i') (0. 17±0. 1 )* 0.085 ') 141 1.451 f) 1.46 i') (0.33 ±0.1)* 0.165 f) 141 2.235 ') 2.25 i

r) (0.2±0.1)* 0.08 ') Cd(Co) ? 6.990 •) 6.990 no 6.490 d

) 6.490 1 110 0.658 0.658 2 110 1.78 1.79 doubly even 6.278 (1) Pb(Fe) 208 •) 7.277 ») 1*)

Bi(Ti) 209 7.149 d

) Zr(Se) doubly even 8.496 1 *)

*) Unless otherwise noted, data are from Nuclear Data Sheets, National Academy of Sciences - National Research Council, 2101 Constitution Avenue, Washington 25, D.C.; or from C. M. Lederer, J. A. Hollander and I. Perlman, Table of Isotopes, Sixth Edition (John Wiley and Sons, Inc., New York,

1967). Energy values are from refs.

“) Ref. 3

). d

) Ref. 10

). •) Ref. 5

).

r ) Ref.*). *) Ref. J0

). “) /"(resonance level-*- excited level)//'(resonance level -* ground level).

*) /"(resonance level -* excited level )//"( total width). ) Ref. 3

). • Ratios taken only at 150°.

[over]

form NBS-418

(REV. 7.14-94) USC OMM-OC 20010-P64 PHOTONUCLEAR DATA SHEET 140

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR E AU OP STANDARDS
References

1) M. Gtoiniai. P. Oliva, D. Prosperi and S. Sciuti, Nud. Phys. 65 (1965) 344

2) M. Giannint, P. Oliva, D. Prosperi and G. Teumbev, Nucl. Phys. A101 (1967) 145

3) K. Min. Phy*. Rev. 152 (1966) 1062

4) G. P. Estes and K. Min. Phvs. Rev. 154 (1967) 1104

5) S. Ramchandran and J. A. McIntyre, Phys. Rev. 179 (1969) 1153

6) Y. Schlcsingcr, B. Arad and G. Bcn-David, Israel Atomic Energy Commission Report TA-Ii;*

(1966) and later reports

7) J. A. McIntyre and V. E. M_ichalk, Bull. Am. Phys. Soc. 12 (1967) 1205

8) R. Morch and A. Nof, Bull. Am. Phys. Soc. 13 (1968) 1451

9) R. Morch and A. Nof, report of the Nuclear Research Centre - Negev, Beer Shcva, Israel; Use of the (y.y') reaction for studying 141 Pr levels 10) G. Ben-David, B. Arad, T. Baldcrman and Y. Schlcsingcr, Phys. Rev. 146 (1966) 852

11) N. V. DcCastro Faria and R. J. A. Levesque, Nucl. Instr. 46 (1967) 325

12) L. V. Groshev, V. N. Lutsenko, A. M. Demidov and V. 1. Felekov, Atlas of gamma spectra from

radiative capture of thermal neutrons, translated from Russian by J. S. Sykes (Pergamon Press, 1959)

13) G. A. Bartholomew, A. Doveika. K. M. Eastwood, S. Monaro, L. V. Groshev, A. M. Demidov,

V. 1. Pclekhov and L. L. Sokolovskii, Nucl. Data A3 (1967) 367

14) C. M. Ledcrer, J. A. Hollander and L Perlman, Table of isotopes. Sixth ed. (J. Wiley, New York,

1967)

15) Nuclear Data Sheets, National Academy of Sciences - National Research Council, 2101 Constitution Avenue, Washington 25, D.C.

16) H. Ferentz and N. Roscnzweig, Argonne Nat. Lab. Rep. ANL-5324

17) R, Moreh and M. Friedman, Phys. Lett. 26B (1968) 579

18) D. B. Beery, W. H. Kelly and W. C. McHarris. Phys. Rev. 171 (1968) 1283

19) H. W. Bear and J. Bardwick, Bull. Am. Phys. Soc. 13 (1968) 1430;

B. H. Wildenthal, R. L. Auble. E. Newman and J. A. Nolen, Bull. Am. Phys. Soc. 13 (1968) 1430 20) C. S. Young and D. T. Donahue. Phys. Rev. 132 (1963) 1724

141
REF. K. Shoda, M. Sugawara, T. Saito & H. Miyase

PICNS-69 Proceedings of the Conference on Nuclear Isospin.

Asilomar-Pacific Grove, California 1969 (Academic Press,

New York & London 1969) p. 137.

ELEM. SYM. A

Pr 141 59

69 Sh 8 egf

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E, P SPC 10-19 D 20 MAG-D DST

,*V •

1 'M

I

' •<.# ••

t

La

E» = 30MeV

1 •

6 8 10 12 14 16 N* M*

t, *

*

,1 *».»»,/ M ‘VsV

ucCe

E. =22MeV

4*V" #

II «

N.

6 8 10 ’2 14 16

• ’ f * •-! .mV-'* •. E. =20MeV

'V, 6 8 10 12 14 16 N- V

Sm

E. = 20MeV

Table 1. Angular distributions of strong proton

groups from -^Ce and Pr.

Nucleus E

p (MeV) v(e)

I. -N *" v Ce 10.3 l+( 0.4+0. l)P -(0.0+0. l)P

12.8 l+(0.2+0.l)P

1 -(0.4+0.2)P2 l+(0. 0+0. 1)

P

1+(0. 1+0. 2)P

2 14l

Pr 9-7

Table 2. The radiative widths of the main IAS. The results are compared with the

single particle strength in W.u..

Nucleus E

P (MeV)

E (a) x —

(MeV)

r /r

Po

(eV)

A

2(T+l) r

r

/ V 0 (W.u.)

14C_

Ce 10.3 18.3 1 (h») 50 0.1

- 12.8 20.8 1 (b) 90 0.1

9-7 15.1 12/ 60 (c) 40 0.2

10.6 16.6 1 (b) 20 0.05

(a) Ground state is assumed for the residual state.

(b) Assumption.

(c_) P. VcnErentano et al. (2).

4 6 8 10 12 14 16 E: (MpV)

Fig. 1. Energy distributions of photoprotons.

Vertical broken lines and solid lines

indicate the position of p Q correiponding to the ground IAS and electric

dipole IAS (2).

FORM N3S-418

(R EV . 7-1 4-641 USCOMM-DC 26010-P64 PHOTONUCLEAR DATASHEET 142

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
‘,EF K. G. McNeill, J. W„ Jury, and J. 3. Hewitt

Can. J. Phys. 48, 950 (1970)

I EL EM. SYM. A

Pr 141 59

REF. NO.

70 Me 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYBE RANGE TYOE BANGS

G,XN SPC 11-28 C 23 TOF-D 2-8 98

-

NEUTRON ENERGY <M«V) Fig. 1. The photoncutron spectrum obtained by the irradiation of praseodymium by bremsstrahlung of maximum

energy 27.5 MeV. the (light path direction being at 98“ to the bremsstrahlung beam. The line is merely to guide the eye.

TABLE I Correlation between peaks in the cross section and the neutron spectrum for the reaction ‘* , Pr(y,n) 1 *°Pr*

Neutron

energy £, (McV)

Excitation energy £. - E, (9.3 McV)

Peaks in o(y.n) Cannmgton ct at. (1968) (McV)t

2.2 II.

5

11.6?

2.4 11.7 2.7 12.0 12.0 3.0 12.3 j i in

12.6?

3.9 13 2 13.1 4.4 13.7 13.7 4.7 14.0 5.0 14.3 14.25 5.5 14.8 14.7 5.75 15.05 15.0

•The error on the eepenmemally determined neutron enerfy a in

ail caves between 70 and 100 WV. ’The question marks indicate doubts expressed in the test of Can* nm^ton ci aJ.

eo«M NBS-418

.REV. 7.1 o-04) use GMM.QC 26010.P64 PH0T0NUCLEAR DATA SHEET 143

U.S. DEPARTMENT OF COMMERCE

national bureauof standards
REF - R. Moreh, S. Shlomo, and A. Wolf

Phys. Rev. C2, 1144 (1970)

ELEM. SYM.

Pr 141 59

REE. NO.

70 Mo 2 hrag

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ? G ... A3X g d a SCD-D DST

(7.632) (7.632)

- 3 = 7.632. LFT

TABLE HI. Summary of the results of spins, parities, and total widths of resonance levels excited by y rays obtained from neutron capture in iron. Parities in parantheses are uncertain.

Energy 5 = | Er -E,\ r»/rr r 7 Isotope (MeV) (eV) Transition (±8%) (10-5 eV)

50 Cr 8.388 18 =1 0* 1 ... 0.90 750 ±200 aSi 7.646 14 ±1 0* 1- El 0.64 480 ± 50

:i Ge 6.018 4.5±0.5 0* 1- El 0.19 120 ± 15

75As 7.646 7.4± 0.3 3/2- 1/4 *> ... 0.11 360x100

103Ag 7.632 9 ±1 1/2- 3/2 ... 0.7 2 ± 1

I!: Cd 7.632 ** 00 H o o* 1- El 0.55 36 ± 15

i:s La 6.013 3.2± 0.6 7/2* 7/2" El 0.50 51li< u.pr 7.632 n.4i8:2 5/2* 5/2* Ml 0.46 72^4 :osTl 7.646 9.3± 0.3 1/2* l/2f-» ... . 0.58 980 ± 90

208pb 7.279 7.1 ±0.3 0* 1* Ml 1.00 780± 60

TABLE TV. Effective elastic scattering cross section

(ar )=cft (T0/Tr ) 'Kxj,f 0), where 6, J, T0 , Tr were

taken from Table m. The temperature of the scatterer was 300*K, while that of the iron y source was 640‘K.

Target

Resonance

energy (MeV) (mb)

so Cr 3.388 905

” 2 Ni 7.646 569

:4 Ge 6.013 61

75 As 7.646 4.4

103Ag 7.632 3.5

112 Cd 7.632 198

133 La 6.018 39

u, Pr 7.632 20

205^1 7.646 574

208 pb 7.279 5560

form NSS-418

(R EV. 7-1 *-941 USC OMM.DC 2001 0- PS * PHOTQNUCLEAR DATA SHEET 144

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
,EF - R. E. Sund, V. V. Verbinski, H, Weber, and L. A. KuLl

Phys. Rev. C2, 1129 (1970)

' EL EM. SYM. A

Pr 141 59

mptmCO 1 REE. NO.

I

; 70 su i

1 hmg

REACTION ! EXCITATION SOURCE 0 E T ECT 0 R RESUL T ENERGY ANGLE TYPE RANGE TYPE R ANGE

G.N ABX 9-24 D 9-24 ACTI

4PI

•j'n

The ‘ 4l Pr(Y,n) cross section was measured from threshold to 24 MeV with a photon beam

produced by the in-flight annihilation of positrons. The photon beam resolution was determined to be l.Uito (full width at half maximum) by elastically scattering the y rays from the 15.1- MeV level in i: C. The (y. n) cross section was found to have a maximum value of ~34S mb and

an integrated value up to 24 MeV of 1.72 x0.16 MeV b. Within the statistics and the photon resolution of the measurement, the results indicate that there is no structure in the cross section, with the possible exception of a weak bump at approximately 17.5 MeV. The results are compared with previous measurements and with theory; the latter comparison indicates that the widths of states in the dynamic collective theory should be considerably broader than those which have been typically used.

T

1

: 1 r

.i ’i

•<* ;6 18 2C PHOTON ENERGY l MeV)

FIG. 4. ul Pr(y,n) cross section.

I

i

-I

I

J

J

I

-I

22 24

topm NBS-410

(R EV. 7-1 4-041 USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 1*5

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS
REF.

METHOD

J. Ahrens, H. Borchert , H. B. Eppler, H. Gimm, H. Gundrum, P. Riehn,

G. Sita Ram, A. Zieger, and B. Ziegler

Elba-71, Tagungsbericht Elektronen Beschleuniger Arbeits Gruppen

(Sept. 1971) Justus Liebig-Universitat Giessen.

ELEM. SYM.

Pr

REF. NO.

A z

141 59

71 Ah 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ,MU-T ABX THR-150 G 10-150 MGC-D 4 PI

141

fig. 9* comparison of the total nuclear cross-section in Pr

with the results of ( jf,n) -measurements

form N3S-418

(R EV. 7-14-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 146

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

H. Beil, R. Bergere, P. Carlos, A. Leprecre, A. Veyssiere and

A. Parlag

Nucl. Phys. A172, 426 (1971 )

ELEM. SYM.

Pr

z

141 59

METHOD REF. NO.

71 Be 4 egf

RESUL T EXCITATION SOURCE OETECTOR

REACTION energy TYPE RANGE TYPE R an ge ANGLE

G. N ABX 9-17 D 9-17 Mnn-T 4PI

TtSIE 1 _ £ Lorentz line parameters corresponding to fits of total 'photoneutron

fig. 1

cross sections presented in

s.Ba ,3,?U s.Ce ,4, Pr j»r »oNd

<r, (mb) 356 ±15 340 ±15 360 -15 350 ±15 315 ±15* 320 ±20

£, (MeV) 15.3 ± 0.1 15.2 ± 0.1 15.0 ± 0.10 15.1 ± 0.1 14.9 ± 0.1 1 5. 1 6 ± 0.08 r, (MeV) 4.70± 0.15 4.45 ± 0.05 4.35 = 0.05 4.26- 0.05 4.90- 0.05 4.49 ±0.05

(MeV • b)

2.6 ± 0.15 2.35 ± 0.13 2.42 = 0.15 2.35 ± 0.13 2.43 ± 0.13 2.42 ± 0.17

Q.06NZA '

1 .30 ± 0.08 t.I6± 0.08 1.19— 0.08 I.14± 0.08 1 . 1 5 ± 0.08

) Lorentz line parameters given in ref. 10

) for ,4t Pr. I0

R.L. Bramblett, J. T. Caldwell, B. L. Berman, R. R, Harvey and

S. C. Fultz, Phys. Rev. 148 , 1198 (1966).

PhOTOPuClLaR CROSS-S'CTlOn

Fig. 1. Total photoncutron cross sections for Ba. ,3 *La. Cc, !i, Pr and Nd as a function of

incident photon energy £. 147

U.S. CEPARTMENTOF COMMERCE

national bureau of stanoaros
..i 1

REF ' D. Pavel, G. Ben-David, Y. Schlesinger, H. Szichman

Nucl. Phys* A160, 409 (1971)

| ELEM. SYM.

Pr 141 59

RE e . NO.

71 Pa 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

type range TYPE RANGE

G,G LFT 6-9 d 6-9 SCD-D 3-9 DST

-

5 LEVELS

Table 1

Experimental A 22 coefficients compared with theory assuming pure dipole transitions

Energy of

transitions tkoVl

Energy of An coefficients for various assumed spin sequences

state IkeV) 1 — 3 — 1 + 0.01000*)

» — 1 — 1 i - 1 - i + 0.1828*) - 0.05713*)

1 — 3—5

+ 0.1071 *)

J 7 7 4 i * - 0.1428 •)

4 — 3 — 1 '+ 0.05001 *)

61 15 0 + 0.090 ±0.037

5970 145.4 - 0.161 ±0.068

4657 1457.9 + 0.082 ±0.078 -t* 0.082 ±0.078

7186 0 + 0.225 ±0.069

5M. Ferentz and N. Rosenzweig, Table of angular correlations coefficients,

•) Theoretical value 5

). ln Alpha_

y beta- and gamma-ray spectroscopy, vol. 2, ed. K. Siegbahn,

(North- Ho Hand, Amsterdam, 19&5) App.8.

Table 2

Partial radiation reduced widths of the 6115 keV resonance level

Energy of

transitions (keV)

Energy of

final state (keV)

Branching

ratio rjr

Reduced widths Most

likely A(EI) (eV-MeV* character 4

) A(M1) x 10*

6115 0 0.557 ±0.010 27 ±5 725 ±139 El 5970 145.4 0.264 ±0.006 14 ±3 370± 71 El 4822 1292.8 0.013 ±0.004 1.3 ±0.4 35± 11 El or Ml

4657 1457.9 0.087 ±0.011 9.5 ±2.6 256 ± 55 El

4511 1603.7 0.0 13 ±0.004 1.6 ±0.5 42 ± 13 El or Ml

4109 2006 0.011 ±0.006 1.7 ±0.8 47 ± 22 El or Ml

3806 2309.3 0.0 14 ±0.003 2.7 ±0.7 76± 19 El

3775 2340 0.015-0.004 3.1 ±0.9 83 ± 23 El 3490 2625 0.025 ±0.003 6.5 ±1.0 174± 37 El

[over]

FORM N8S-418

(REV. 7-1 4- 041 USCOMM-OC 26 0 t 0- P6 4 PHOTQNUCLEAR DATA SHEET 148

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
7/2(-)- •6115 (5/2)-

g

^' ” O 1 ^

- N ^ N N ,, ,, ,a-262S*2 O <Ni - -M\j 1n-OOM3'

jot v v «rm<n)0

I I

Mwt

i

i!

i i

7/2.

i/2*-1-

Pr

.2340: i 2309.3: as

I I I II I O' ~ © O K in »» * 7 o

O

«1

1‘~ •

7 *>« £<N* S I § _ j 9

VO _ *T ^ <J> O

<o _ <\j O (NJ — — ® VO lO nn iflinoio

i i

7256

2006:2

.1670

'603.7 :0.6 1122

- 14573:05 (V2„*_

-1292 8:0.5

(i/2

i

-.454:0.5 7/2.

-0 V2»

1433

5/2 (•) y j | 7188 5

55 ^ s = 5

i S -

00 M O

sSS r- ^ u?

I

15/2,7/2)- •6111 (5/2 ,7/2) •

-t»l_l666 -1597:8

'132:3 (3/2*1 M22

o s = r

— V O o — a) o — O' o K

(tftfMT (O J_L 2345

i46i: 5

lliii

o ^ ^ 3 ^ ^

O n iA o a w

O *• *' •• ** °* I! o ° 2! is-i ® £ 5

•o o © o CD (O N.

CD »0 CO f*- f\* *"» «n ONiJliONO© © 00 N P* S.

8883

!

i _I 0 5/2* -» 0 5/2* -*

0 5/2*

Pf

I FT

M _Pf

- i946

- 1847

-1655:4

-1513

-1295:2

-147 7:6.0 0

Fig. 2. Decay schemes of the observed resonant levels of l4 ‘Pr. The uncertainties in the energy of the levels are estimated as id keV unless indicated

explicitly.

149
REF.

R, Pitthan and Th. Walcher

Phys. Letters 36B , 563 (1971)

ELEM. SYM. A

Pr 141 59

METHOD REF. NO.

71 PI 1 _egf_ REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E.E/ SPC 4-18 50.65 MAG-D DST

Counts

u Cool75

70 65

Ert

. 65MeV 0.129°

* \ M

sVi* t .\**~*. .... "

. vx.°

73 A*

^

a to 12 h is ia 20 E« |m«v] Fig. 2. Spectra of electrons scattered tnelastically from La, Ce and Pr targets at the same primary energy and the same laboratory scattering angle. No

background has been subtracted. Note the suppressed

zeros of the ordinate scales.

form N3S-418

IR EV. 7-1 4-641 USCOMM-DC 26010-P64 PHOTONUCLEAR DATA SHEET 150

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDAROS
REF. EL EM. SYM. A T. K. Deague and R.J.J. Stewart

Nucl. Phys. A191 , 305 (1972)

Pr 141 59

METHOP REF, NO.

7 2 De 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,XN ABX 9-22 C 9-22 BF3-I 4 PI

( 8 . 2") 560+

Table 1 The integrated ,vn) and ,4, Pr(;\ \n) cross sections and their minus-first and minus-second moments, compared with the appropriate sum rules

Fig. I. (a) The 1J0 l.a(;\ mi) crow section, obtained In \ IIPI. unfolding fioni yield vlata measured

in 0.1 MeV steps. Also shown is the DCM dipole spcetium tor

1<: Nd. and a lit to it ot I.orentr line shapes with widths 4.0 MeV (solid line), tb) I he '*'I’r(; - . mi) cross section, obtained by \ BPL

unfolding from yield data measured in 0.! MeV steps. Also shown is ihe OCM dipole spectrum lor ‘"Nd, and a lit to it of I orcnlz line shapes with widths 10 MeV (solid line).

IlfCV. /. (4.041 USCOMM-OC 260I0-P84 PHOTONUCLEAR DATA SHEET 151

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
El-Hussieny M. Diefallah

REF. Int. J. Appl. Rad. & Isotopes ,23 , 153 (197 2) EL EM. SYM. A Z

METHOO

Pr 141 59

REF. NO.

7 2 D1 7 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,P ABY THR-300 C 106-300 ACT -I 4PI

- One monitor unit = 0.735 x 107 ergs In beam.

Pr-140 yield Is of the order of 1 (f reactions per monitor unit.

Emu. M.V

Fic. 2. Yield data from the production of

140Nd in Pr.O„ targets.

form N3S-418

(R EV. 7*1 4. 441 USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 152

U.S. DEPARTMENT OF COMMERCE

NATIONAL 0UREAUOF STANDARDS
P. Dreyer, H. Dahmen, J. Staude & H. Nucl. Phys. A181 , 477 (1972)

METHOD

H. Thies

ELEM. 5 VM.

Pr

REF. NO.

59

72 Dr 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

TYPE RANGE TYPE RANGE

G,N ABX 9-20 C 9-20 ACT-I 4PI

447

u 4 20 22 Photon #n#rgy (M#V)

Fit, 3. Cross section for ,4l Pr(y\ n) l40 Pr from threshold energy to 19.5 MeV. (a) and (b> show the cross-section curve obtained with two different analysis bin widths using the LP method. The horizontal bar* represent the bin width .1 £„ increasing with the bremsdrah'ung endpoint energy £„. tc) and

(d) show the same cross section calculated with bin width from 0.4 to 0 4 MeV respectively 0.3 to 0.45 Me\ using the CLS method. The horizontal

bars represent the FWHM of espermiental resolution and not the uncertainty in energy

ro»M N3S-418

B E V . 7-1 Z-641 CSC OMM-O C 2601 0-P64 PHOTONUCLEAR DATA SHEET 153

U.S. DEPARTMENT GF COMMERCE

NATIONAL BUREAU OF STANOAROS
RIF. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nucl. Phys. A210 , 355 (1973)

SUEM. 8 YM.

Pr 141 59

MKTHOO REF, NO.

73 Ba 20 egf

R1ACTION RKIULT

EXCITATION 6N1R0Y

aeunes 96TEST0N

ANOUK TVPi RAN AS f VPS RANSfe 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 1S

).

MEAN NEUT ENERGY

1H. Baba and S. Baba, Japan Atomic

Energy Research Institute report

JAERI-1183 (1969).

2H. Baba, Nucl. Phys. A159 , 625

(1970).

15 T.D. Newton, Can. J. Phys. 34,

804 (1956).

Fig. 15. Ratio a,Mia9 versus atomic number A. Here aobt is the level density parameter taken from

the neutron resonance work of refs. *• 2

), 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 N8S-418

(R EV. 7-1 4-94) USCOMM-OC 260I0-P94 PHOTONUCLEAR DATA SHEET 154

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
i

i

9 2 3

6 —

5 3

o ©

S2S

1 u -3 -J U a. i- • - * 6 « «

“i "l *"l ~» VO m 30 O 90

r~i f-* h» —

a. 0 O

a. a. j

>> a

eS

4- A

0-1H £

' I I 30 N O

— «-»

i 4

S 3

O a.

aaO4

> © 3

S 3

x N r* oo - - 3 on — 3 3 (N^w^^oo 3 (s«^^r^w-» o O vo T — oo O T'-nc* o — 3 30 — O O — fN <N <N o <-><N<N — 0 3 IN — m C4 © (N <N V> ©

O — — s = -

j y

•. ©

ft* H*

>v a aj £ a

t- H

3 ©

< Cl. 155

c 5;0 w Vl I 2 o 2

= © S

SQ — « c

E o £r- -c

84) £0 5

1 .a

. E c 2

g s

.5 u

V- J

V — 2 5

* e

3 -C U3 5 © -2 < 6 4 3 o 3 1 -s 4 &

u 0 3 u uc :- > . E . a 3 3

8. X X .a f u - ao 2 e 5 j-

, u -O c v — o t> 5 O o *3 w

y, 30 — C

U 1> 5 V > U

= oc

= 6 =

& « *3 wz uu SU a o. v- | js.I

IeI

3 0 0. §* s

* 4 5 — > o

•3 <- 2 e

S ° a 2 1 g ! 1 a £ » § c » a. 2

3 2 « o » 55 a r»« C e c a

5 3 S 3 c o 3 ©

> . .» e « 2 i

o «j £ -;pe 1^-2 2 2 h ^

j'*' s *

<C a * e

3 c = _ o

2 « -

'* U jj » E t

3 5 o

13 !* u w a » 4> C a >»g

P .3 •- 3 >» « i s a u

5

39 3 0 15 "a 3 U <« Z -J 3 rrs.0

c ". M

a 02 1 u u _ Lm V* O a p

uj

</» S ^

s. 2 3

2 c

>• 2 .2 §

o Q» u

•S 1 3

*-» jo £

a. ^ u « u « w c ^

l> ctf t— 3 C y

u_o?c5 ^ ^ c «

-= - t» •?3f

> c« u |3£ E 50 ,

3

2 .S w ** » « u- ^ «Uj 0 •=•- u _3 O

> c H ape

3 j ^ s O =

jS ^ 3

2? y, ^ « < -£
j_A.

F.R. Buskirk, H.D. Graf, R. Pitthan, H. Theisaen, 0. and Th. Walcher

PICNS-73, Vol.I, p. 703 Asilomar

METHOD

Titze,

ELEM. SYM.

Pr

REF. NO.

141 59

73 Bu 14 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,E/ SPC 2- 20 C 50, 65 mag-d DST

*

The E2 resonance which is

clearly visible at lo.8-o.2 MeV

exhausts more than 50 % of the sun

rule. Fig. 2 shows the excitation

energy of this resonance as a function of A for the nuclei

measured at Darmstadt and the Sendai result for ^°Zr I 5 J. Bohr and

Mottelson 191 predicted a collective E2 resonance whose isoscalar

^-^MeV. The data of Fig. 2 are consistent with Ex=65 A

/ '^MeV suggesting to identify the observed reso- nances with this type of E2 excitation.

form N3S-418

(REV. 7-1 4-64) U S C O MM-N B 3-0 C PHOTONUCLEAR DATA SHEET 156

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

method

Rainer Pit than ELEM. SYM. A Z

Z. Phyaik 260, 283 (1973)

Pr 141 59

REF. NO.

73 Pi 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E.E/ ABX 7- 21 D 50 MAG-D 165

•

Fig. 7. Spektren von unclastisch an La, Ce und Pr gestreuten Elektronen, sonst wie

Fig. 5, s. Text

- O am N3S-418

!R EV. 7-1 4-641 USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 157

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
C.L. C.M. 3 rM. J. Tenenbaum, R. Moreh, and A. Nof

Nucl. Phys. A218 . 95 (1974) Pr 141 59

METHOD REF. NO. 74 Te 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.G LFT 6 P d- i oo SCD-D DST

6=6. 877

Table 2 Measured angular distribution coefficients A2 , the ratios jV||/Arj_, the spins and parities of the ground

and the resonance levels, /07 and /rT

, and the character of the ground state transition

Scatterer Ey (keV) ^2 •Yj (AYl Jo" J," Transition

S5 Mn 7491 0.01 ±0.02 1.00±0.02 i~ i

i *°Ce 5660 0.51 ±0.02 1.14±0.04 0* 1- El

•**Pr 6877 0.11 ±0.02 0.95 ±0.03 i* i* Ml

*«Nd 6877 0.51 ±0.03 1.10±0.04 o

*

1 - El IMHg 4922 0.51 ±0.02 1.18±0.03 0* 1 - El

jo»Bi 5603 0.06±0.02 0.97 ±0.02 f- ML

Table 4

Values of r, jT0 and the energy separation <5 (between the incident y-line and the resonance level) as obtained from the analysis of the various experiments

Scatterer Ey

(keV) r

(meV)

r0 (meV)

<5 (eV) D

(cV) Kmi (IO-’McV 1

) (10-*McV- J ) ”Mn 7491 450±250 80± 40 17 ±1

**°Ce ) 5660 13± 3 12± 2 4.7 ±0.3 6800 0.33

• Atpr .) 6877 85 ± 35 17± 9 6.7±1.5 450 116

14! Nd ) 6877 340 ± 40 270± 20 12.4±0.3 1200 26

I01Hg 4922 300 ± 50 260 ± 20 4.2±0.5 19000 3.4 S0, Bi ) 5603 950 ±200 950±200 13 ±1 34000 160

The radiative strengths Ktl and X'KU are also given. The level spacing D refen to the excitation energy of the resonance level jE».

*) These values are slightly different from those of ref. •) and were obtained from a renewed

analysis of the experimental results.

^A. Wolf, R. Moreh, A. Nof, 0. Phys. Rev. G6, 2276 (1972).

Shahal, J. Tenenbaum,

form N3S-418

(R EV . 7.14.64) USCOMM-OC 26010-PC4 PHOTONUCLEAR DATA SHEET 15g

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
- -i.

*ef. H. E. Jackson, G. E. Thomas, K. J. Wetzel

Phys. Rev. Cll , 1664 (1975)

ELEM. SYM.

Pr 141 59

METHOD

| REF. NO.

i 75 Ja 1 hmg

REACTION excitation SOURCE DETECTOR

H£5UL T ENERGY ANGLE TYPE PANCE TYp E range G,G ABX 11 D 11 SCD-D 150

(11-387) (11.387)

TABLE L Differential cross sections measured for

elastic and inelastic scattering of 11.39- MeV photons.

State or stales 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.

(deg) do/du> (elastic) (mb/sr)

do/dui (inelastic) (mb/sr)

90 150

150

(2+, 45 keV) 0.169*0.011

0.355*0.041 “Th (2*, 45 keV)

0.331 * 0.035

0.173*0.016

0.236*0.24

0.210*0.022

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

0. Column 4 describes results obtained by perturbing

those parameter to meet the constraint of Eq. (3) (see

text). mTa (f*. 136 keV) (^ , 301 keV)

da(B)dQ

90 0.073 * 0.008 0.020 * 0.004 (mb/sr) 0.009*0.004

Target Calc. Exp. ^RmJ9)/dOttalK(d)

150 0.145* 0.015 0.017*0.004 9 = 150* imHo (f , 95 keV) (f

,

210 keV) Pr 0.025 0.030*0.008 0.0 0.0

0.022*0.004 Tb 0.094 0.134*0.012 0.53 0.57 0.46*0.04

150 0.141*0.014 Ho 0.170 0.141* 0.01.4 0.28 0.28 0.25*0.04

0.013* 0.004 Ta 0.160 0.145*0.015 0.23 0.22 0.23*0.04

luTb (|\ 58 keV) (f. 138 keV) 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 0.062*0.006 0.024*0.003

90 0.013*0.003 • o n o> «T>

0.134*0.012

0.042 * 0.004 Tb 0.062 0.062*0.006 0.76 0.82 0.60* 0.07 150 0.019*0.004 Ta 0.109 0.074* 0.008 0.32 0.30 0.33* 0.07

ul Pr U 0.172 0.1G9* 0.008 1.29 1.15 1.03* 0.10

ISO 0.030x0.008

PORM H3S-418

R E V. 7-1 4-« 4 ) use OMM-N B S-O

C

PHOTONUCLEAR DATA SHEET 159

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. J.I. Uegaki and K. Shoda

Nucl . Phys. A294, 141 (1978)

EL EM. SYM.

Pr 141 59

78 Ue 1 rs

REACTION RESULT EXCITATION ENERGY

SOURCE DETECT O R ANGLE

TYPE RANGE TYPE RANGE

E,P ABX 12- 15 D 14- 17 MAG-D 125

'

Table I

Strength of the resonance in the (y, p0 ) and (y. p) reactions on

l,9 La and 14l Pr. and the ratio of proton group 1 and proton group 2 emitted through the fT 2 IAR K^df Jtr^.df Proton Proton

Oib MeV) (/ib • MeV) group ! (?„) group 2 (%)

14l Pr 44 + 9 240 + 30 40±l0 60+10

ll, La <5 260 + 30 5± 5 95± 5

Ep( MeV

)

Fig. 4. The- proton spectra of the 141

Fig. 3. The differential cross section of the ,4, Pr(e. c'p) reaction for 0 m 125.3' (see caption to fig. 2). over

use OMM-N BS-OC PHOTONUCLEAR DATA SHEET 160

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
161
ref. J. Uegaki, K. Shoda

Nucl . Phys. A341 , 125 (1980)

EL EM. SYM.

Pr 141 59

METHOD REf. NO.

80 Ue 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE E.P ABX 10-25 D 14-25 MAG-0 125

-

Abstract: The cross sections and the proton energy distributions of the (e, p) reactions on 1J,La and VIRT PHOTON ANALYSIS

'“Pr have been measured around the T, GDR. The energies of the T, GDR have been given as E% = 21.0 MeV in

1 J, La and £, = 20.4 MeV in Pr. The decay protons of the T, GDR have

been studied. The proton groups which leave the residual nucleus in the neutron particle-hole

states have been clearly seen in the same energy regions as the decay protons emitted through the low-lying IAR.

E NUCLEAR REACTIONS ll9 La. 14l Pr(e, p), E = 15-25 MeV; measured <r(£

t), a{E^\

deduced a{y, p) vs. £p

. Natural target

Table I

Results of the energy-weighted integrated cross-section calculations

Element e;

(MeV)

e; Ei-Ei (MeV)

<*-. *) *V> <*-, la - , (%) (MeV)

exp. theor. (mb) (mb)

exp. theor.

l3, La M‘pr

15.2 + 0.1 b

) 15.1 +0.1 b

)

21.0 + 0.2 20.4 + 0.2 5.8±0.3

5.3 ±0.3

5.83 ') 5.32 •) 136 b

) 125 b

)

1.01 +0.07

1.27 ±0.24

0.74

1.0

2.3 •) 3.0 C

)

*) The notation shows a t , = j(o t /E)dE. a*

,

= Jlo-, £)d£.

b

) Ref. I0

). Integrals were earned out up to 25.0 MeV by present authors.

') Calculated by using eqs. (1) and (2) in the text Refs. 3 *).

Fig. I. The proton spectra of the i e. pi reaction at 0 = 1 25.3° laboratory, (a)

1 3g La. Bombarding energies are Er =» 22.0 MeV and £, = 20.8 MeV. respectively, lb)

1 *' Pr Bombarding energies are £, = 21.4 MeV

and Et = 20.2 MeV. respectively.

FORM M8$*410

(REV. 7» t 4*64) USC OMM-N8S-OC wen

PHOTOHUCLEAR DATA SHEET 162

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Fig. 2. The differential cross sections of the (e. p) reaction at t? = 125.3* lab. The arrows show the

positions of inflection caused by T, GDR. (a) '’’La. (b) , * , Pr.

’(b)

,4'Pr( y,p) e= 125.3°

-

I •

, ,.r 'in''

1 1 1 1 1.1. A L .i . l"

14 S 16 17 18 19 20 21 22 23 24 25 E y

(MeV)

Fig. 3. The (y. p) differential cross sections calculated from the present (e, p) differential cross sections by the least structure method [ref. '*)]. The broken lines indicate assumed contribution of the T* GDR

to the (y, p) cross section, (a) ,J, La. (b) ''“Pr.

163
3

"'
NEODYMIUM

Z=60

Neodymium was discovered in 1885 by C. A. Wei sbach when he

separated didymium salts, a metal he thought was a simple

element, into two chemically distinct fractions, neodymium

(neo t "new") and prasesdymi urn. The crude oxide of

neodymium is used for clearing the color, due to iron, in

glass. A mixture of neodymium and praesedymium absorbs

light in the region of the harmful sodium D lines and thus

is used in welder's and glass blower's goggles.

F. I. Haviicek.

Nuovo Cimento _1^, 969-73 ( 1959)

METHOD

60

Betatron 59 Ha 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G, A SPC THR - 30 C 30 EMU- D 2-5 DST

form NBS-418

(REV. 7*1 4-04) USCOMM-OC 20O1O-P64 PHOTONUCLEAR DATA SHEET 167

U.S, DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
E ' B. Arad (Huebschmann) , G. Ben-David (Davis),

Y. Schlesinger

Phys. Rev. JJ3, B684-700 (1964)

METHOD

Reactor, (n,y) reactions source

I. Pelah,

EL EM. SYM. A Z

Nd

REF. NO.

60

64 Ar 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G ABX 7 D 7 NAI-D 135

(6.867) (6.867)

Table II. Capture gamma-ray sources and their properties.*

Chemical

Source composition Mass

Principal 7 rays (in MeV)

A1

ClCo

CrCu

FeHg

Mn

Ni

TiV

Y

Metal

polvvinyl Chloride CoO

Metallic powder

Metal

Metallic powder

Hgl (N0,)i-2H,0 MnOs

Metal

TiOj Vs06 YjOa

1.640 7.73 0 380 8.55, 7.78, 7.41, 6.96, 6.64, 6.12, 5.72

o' 230 7.49, 7.20, 6.98, 6.87, 6.68, 6.48, 5.97, 5.67 0 480 9.72, 8.88, 8.49, 7.93, 7.09, 6.65, 5.60

1 860 7.91, 7.63, 7.29, 7.14, 7.00, 6.63 0.440 9.30, 7.64, 7.28, 6.03 0.310 6.44,6.31,5.99,5.67,5.44

0 240 7.26, 7.15, 7.04, 6.96, 6.79, 6.10, 5.76 0 900 9.00, 8.50, 8.10, 7.83, 7.58, 6.84, 6.64 0.210 6.75, 6.56, 6.42 0 120 7.30, 7.16, 6.86, 6.51, 6.46, 5.87, 5.73 0.200 6.07, 5.63

: vf more detailed information, additional lines, intensities, etc., see Ref. 6.

Table III. Effective cross sections.

7 source Energy (MeV) Element Protons

Scatterer Neutrons(<ryy) (mb) Notes Hg 5.44 Hg 80 116, 118, 119, 120, 121, 122, 124 128

Cl 6.12 Pr‘« 59 82 103 a V 6.508 Sn 50 62, 64-70, 72 14 Co 6.690 Pr‘« 59 82 2.7 a Co 6.867 Nd 60 82, 83, 84, 85, 86, 88 22 A1 6.93 Pb=°* 82 126 2900 b

Cl 6.98 Pb 82 124, 125, 126 346 a Ti 6.996 Bi« 83 126 1560 b Cu 7.01 Sn 50 62, 64-70, 72 1000 b Ti 7.149 Pb50* 82 126 1000 b Co 7.201 pb« S2 126 25 Mil 7.261 Pb30* 82 126 25 a Fe 7.285 Pb“ 82 126 4100 a V 7.305 Ptr°* S2 126 12.5 Hg 7.32 Pb 82 124, 125, 126 5500 c Fe 7.639 Ni 28 30, 32, 34, 36 10.5 d 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 Ni 8.v/7 Sm 62 82, 85-88, 90, 92 2.8

» A large error could be introduced in the cross-section values because or 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 scatterers were used, which will introduce a systematic error in estimating (*yy) for resonances having a high

nuclear cross section.

• 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, Kand, 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 is no possibility of deciding which line is responsible for the scattering.

form NBS-418

(REV. 7-14-04) USC OMM-OC 26010-P04 PHOTONUCLEAR DATA SHEET 168

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR HA U OF STANDARDS
Rer- G. Ben-David, B. Arad. J. Balderman, and Y. Schlesinger

Phys. Rev. l£6, B852 (1966)

EL EM. SYM.

Nd

A z

60

METHOD

Nuclear Resonan ce Scatte•ring using N,G reactions.

REP. NO.

66 Be 3 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE TVP® RANGE

ANGLE

G.G RLX 5

- 10 D 5-10 NAI-D 5 . 10 135

«6;- n

|

5|_ d n h

- - H \

carafe

2 - j a. %

inim. m 9a Mg Ai Si 9 S 0 X Co Ti V CrMsFtCaNCsZnStBf T Zr Mb Aq Cd Sn Sb "s [ Bo la Ce Pr Nd Si» Gd Of Ho £r Yt> Hf ToWPIAuHdTlPbBiThU

I ei3 i 4 «*irii(2ci 22 a }4 29 SCTegis]0 )499 « 4Z 47 <015051 52 53 x 52 58 59 mm s< « a tin n n r* n 7990 aieauns

12 12a

m M M

a

30 S6 74 94 U0

32 32 60 60 7« 90 97 10

33 tttt « 78 78 90 96 a

34 34 34 a 78 9* so g 30 30 36 04 04 80 60 COCO 121 rr 37 03 03 81 81 101 22 22 122 * a 31 00 04 meziSKro 02C202 24 Q4 04 eoaaeoso 40 40 or S3 03 S3

22 22 42 00 oo 00 84 04 C404 Ibmoi

23 43 to » 03

2*24 44 44 70 70 70 MM COCO 08 •42142 23 40 40 71 IT C7 K3

21 2> 40 72 72 72 m m m 00 00 C0 M0

27 27 worn 73 30 90 30 09 2KKM Si 31 74 n t

4

91 IK) a 32 32 7* 32 92 32 12 112 30 30 30 33 a 93 04 a 34 34 94 94 G6 s 33 93 87

30 30 M 90 18 88 30 97 20

90 90

Fic. 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

0 (mb) Scatterer Energy (MeV) Gamma

source

3 (mb) Sm‘« 8.997 Ni 100 Sn 7.01 Cu 110 pr u» 8. 881 Cr 9 Nd 6.867 Co 30 La 8.532 Ni 6 Pr1 ** 6.867 Co 3 Te 8.532 Ni 3* Te 6.7 Ni Cu 8.409 Cr 24 La 6.54 12 Zr 8.406 Se 3050 Cd 6.474 Co 110 Zn 8.1 19 Ni 13 Mo 6.44 Hg 25s Sc 7.817 Ni 50 La 6.413 Ti 72 Se 7.76 fC 90 Mo 6.413 Ti 10 Sb 7.67 V . . .b Tl 6.413 25 Cd 7.64 Fe 40* w ~6.3 Ti • • .i Ni 7.64 Fe 7* Sb 6.31 Hg 6* Pr1 ** 7.64 Fe 12* Ti 6.31 Hg 2* Tl 7.64 Fe 370« Sn 6.27 75 La 7.634 Cu 7 Pb*« 6.15 Gd Mo 7.634 Cu u Te 5.3 Ni . . .i Bi*" 7.634 Cu 4 La 6.12 Cl 35 Te 7.528 NI 664 pr ut 6.12 Cl 110

Bi** 7.416 Se 100 Pt 5.99 Hg 40*-s Bi«» 7.300 As 80* Tl 5.99 Hg 5s Pb*< 7.285 Fe 4100 Pb*4 5.9 Sr . . .h Cl 7.285 Fe 34 Ce 5.646 Co 17 Pr1 ** 7.185 Se 30 Bi** 5.646 Co 55 Tl 7.16 Cu 120 Pb*** 5.53 Ag 70 La 7.15 Md 50 Hg 5.44 Hg 754 Bi*» 7.149 Ti 2000 Hg 4.903 Co 383

mj -vMii^vuvuk vi * wui^ica opcuu u ill* • A broad scattered ipectrum 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 levellia the complex spectrum of Nl t

rays on Te.

• Rough estimate.

• May be inelaatic component from 7.S28 level in Te.

• The relative line intensities la this cate are doe to Groshev end co-workers.

• No line is known for the source at this energy,

1 Difficult to resolve among the many source Unas preteat at this energy,

I 169

wo ma H8S-4I8

|R*V. 7-f*.«4l tJ^C^MM OC >4010-r*4 PMOTONUCl.gAR DATA SKL«.

.
REF.

H. Beil, R- Bergere, P. Carlos, A. Lepretre, A. Veyssiere and

A. Parlag

Nucl. Phys. A172, 426 (1971)

ELEM. SYM.

Nd

A z

60

METHOD REF. NO.

71 Be 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.SN ABX 10-18 D 10-18 MOD1

4 PI

Table 1 Lorentz line parameters corresponding to fits of total photoncutron cross sections presented in

fig. 1

1391 - s.Ce 14, Pr 59rr *oNd tiPr*)

<r, (mb) 356 ±15 340 ±15 360 ±15 350 ±15 315 ±15 320 ±20

£, (MeV) 15.3 ± 0.1 15.2 ± 0.1 15.0 ± 0.10 15.1 ± 0.1 14.9 ± 0.1 15.16± 0.08 T, (MeV) 4.70 ± 0.15 4.45 ± 0.05 4.35 ± 0.05 4.26 ± 0.05 4.90 ± 0.05 4.49 ±0.05

(MeV • b)

2.6 ± 0.15 2.35 ± 0.13 2.42 ± 0.15 2.35 ± 0.13 2.43 ± 0.13 2.42 ± 0.17

0.06HZA-

- 1.30± 0.08 1 . 1 6 ± 0.08 1 . 1 9 ± 0.08 I.14± 0.08 . 1.15± 0.08

*) Lorentz line parameters given in ref. I0

) for 14, Pr.

10

R. L. Bramblett, J.T. Caldwell, B. L. Berman, R. R. Harvey and

S. C. Fultz, Phys. Rev. 148 , 1198 (1966).

PHOTOIUJClEAR CRCSS-SECTIOn

Sj

incident photon energy E.

function of 170

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANOARDS
T. Mectrasiri and S. A. E. Johansson

Nucl. Phys. A167 . 97 (1971)

ELEM. SYM.

Nd 60

REF. NO.

| 71 Me 1 egf

REACTION RESULT EXCITATION SOURCE OETECTOR

ENERGY TYPE RANGE TYPE RANGE ANGLE

G*£ A3Y THR-900 C 300-900 FRG- I 4PI

- •

Table I The constant fission cross sections above the threshold

Element a, (cm1 ) Element <*f (cm1

)

Pb (5.0±0.2)x I0* 2T La (1.1 ±0.1)x 10" 1 * Au (l.7±0.1)x 10"” Sn (4.3 ±1.1 ) x 10-2 * Ta (3.3 ±0.2) x 10~ 2 * Ag (8.4±2.0)x 10"** Yb (I.2±0.2) x lO -1 * Mo (1.7±0.4) x 10“ 2 * Ho (5.5±0.3)xl0-»» Cu («.6±I.2)xlO-* # Gd (5.3 =0.8)xl0- 1* Ni (5.8±0.1)xl0-1# Nd (1.3±0.2)xl0-**

posm NBS-418

<R EV. 7-1 4-641 JSCOMM.OC 26 0 1 0- 06 4

[over]

U.S. DEPARTMENT OF COMMERCE

m NATIONAL B'JREAUOF STANOAROS

...
(i) G)

TO J)

Fig. 1. Crosj sections per equivalent

quantum c^(E) as a function of log E,

172
E. Hayward, W. C. Barber, and J.J. McCarthy

Phys/Rev. CIO, 2652 (1974)

method

! ELEM. SYM. A

Nd 60

REF. NO.

74 Ha 4 hmg

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

$ G,G ABX 15 D 15 NAI-D 90

(15.1) (15.1)

POL PHOTONS

TABLE L Results

Target doVdQj, dar/dU r(Arbitrary units) n r) (DCM)

Cd 0.042 ±0.028 0.39 ±0.05 0.11 ±0.07 0.09 ±0.07 -0-. 19 In* 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* 0.14 ±0.030 0.77 ± 0.05 0.18 ± 0.05 0. 16 ±0.05 Nd* 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 Hg* 0.33 ±0.09 2.16 ± 0.15 0.15 ± 0.04 0.13 ±0.04 0.03 Pb* 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 * 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±0.19 0.09 ± 0.05 0.07±0.05 0.08

1 Data not previously reported.

TABLE II. Comparison with Saclay data.

Target

U.l*

This experiment

(Arbitrary units)

Uol2 Saclay

(mb) Ratio

Cd 0.337 ± 0.058 0.508 0.663 ±0.114

In* 0.507 ± 0.046 0.591 0.859 ±0.078

Sn 0.550 ±0.072 0.822 0.669 ±0.096

Sb* 0.590 ±0.061 0.794 0.743 ±0.077 Nd* 0.337 ±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 Au 1.62 ±0.20 2.92 0.555±0.068 Hg* 2.16 ±0.20 3.29 0.540 ± 0.060 Pb* 2.20 ±0.27 3.43 0.641 ±0.078

Bi 2.53 ±0.31 3.43 0.737 ±0.090

Th * 1.89 ±0.22 2.73 0.692 ±0.080 U* 2.13 ±0.22 2.83 0.754 ± 0.077

0.656 ± 0.021

* Data not previously reported.

'ohm N3S-418

(R EV. 7-t 4.84) JSCOMM-OC 29 0

0- PC 4 PHOTONUCLEAR DATA SHEET 173

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. S YM.

Nd

METHOO REF. NO.

76 Em 2

60

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE R AN ge

GiF ABY THR-999 C 999 TRK-I 4PI

Table 1 Measured values of <7, at E= 1000 MeV and deduced values of ak assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element z

2/a

(mb) (MeV)

<tk (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

Tl 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 1.1x0.08 255 (8 ±0.7) x 10” 1 Re 30.21 (3.7±0.3)x 10-' 2S0 (2.9 ±0.3) x 10-' W 29.78 (3.5 ±0.3) x 10-

290 (2.8 ±0.3) x 10- 1 Ta 29.45 (3_3x0.3)xl0-‘ 300 (2.7 ±0.3) x 10- ‘ Hf 29.04 (1.7 ±0.2) x 10" 1 310 (1.4 + 0.2) x 10* 1 Yb 28J1 ( 1.3 ±0.1) x 10* 1 330 (1.2 ±0.1) x 10" 1 Tm 28.18 (7.5 ±0.8) x 10 -3 335 (6.8±0.8)xl0- J Ho 2721 (3.6x0.4)x 10

- 1 355 (3.5 ±0.4) x 10- J Dy 26.80 (2.6x0.3)x 10* 2 360 (2.5 +0.3) x 10' 2 Tb 2658 (2.5 ±0.3) x IO* 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“ J Sen 25.56 (1.3 ±0.2) x 10" 2 390 (1.4±0i) x 10" 2 Nd 24.96 (9.2 ±0.9) x 10~ 3 405 (1 ±0.1) x 10 _1 Ce 24.00 (8 ±0.9) x 10-’ 420 (9 ±1 ) x 10“ J La 23.39 (8.4 ± 0.9) x 10” 1 430 (1 ±0.1) xlO' 3 Sb 21.36 ( 1.2 ±0.2) x 10" 2 460 (1.5±0.3)x 10* 2 Te 21.19 (8.8 ± 1 ) x 10~ J 465 (1.2 ±0.2) x 10" 2 Sn 21.06 (1.3 ±0.2) x 10“ 1 465 (1.7 ±0.3) x 10* 2 Cd 20.49 (1.7±0.3)xl0- J 470 (2.2 ± 0.4) x 10~ 2 Ag 20.47 (2 ±0.3) x 10" 2 4*0 (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 lO

-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" 1 510 (4.4 ±0.9) x IQ" 1

12

20

A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. 6_, 512 (1968) . 7T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

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

81, 61 (1966)

.

i 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.

Z>

form M3S-418

(REV. 7-1 4-641 USCOMM-NBS-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 174
W. Muckenheim, P. Rullhusen, F. Smend, M. Schumacher

Phys. Lett. 92B, 71 (1980)

ref. EL EM. SYM. A l

METHOD

Nd

REF. NO.

60

80 Mu 4 hg

EXCITATION ENERGY

SOURCE detector

REACTION RESULT ANGLE

TYPE RANGE TYPE RANGE G,G ABX 2-4 D 2-4

UKN-D DST

(2.754-3.254) D (2. 5-3. 5)

-

LEV., 2.754 , 3.205, 3.254

Elastic photon scattering investigated at energies of 2.5 -3.5 MeV using radioactive sources has revealed a large probability tor observing photoexcitation of nuclear levels. This finding removes inconsistencies in previously investigated properties of Delbruck scattering and provides a new access to nuclear resonance fluorescence.

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-, R- and N-amplitudes.

£• » 3

f-S f

a- 3 ®,

•• 2 ^

— c 0 S 1 3

C t»

Z a

O “

- > n

a —

O to vn ® — ©

Al Al

© © ©

V* VI

vo *o o

*o r- o — —

vo fO 00

fh O' <o (N — Ov vO —

to I — — I I I I n M

<1 «

2 — t® 3 -3 —

.

§ S 5 Jll “ -3 _

.3 u O

> ‘5 £ = U j -5 .a > “j c

5 -J._ =

.3 ".2 2

- 2 ? I §

Ji -5 e. -2

as >

> Q 3

'u >

< 1

S > -r -t O -r 1-1 -r rs

«o VO — v, O V, u-t f— ^4 o r— *‘-1 r-i -r rl fn <-i ri (-i ri f*i

2 a

'OKU NBS-411

(R EV. 7- 1 4.441 USCOMM-NBS-OC PH0T0NUCLEAR OATA SHEET 175

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref M. Schumacher, F. Smend, W. Muckenheim, P. Rullhusen, H.G. Borner

Z. Phys. A3QQ , 193 (1981)

EL EM. SYM.

Nd 60

methoo REF. NO. 81 Sc 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYRE RANGE TYPE RANGE

G,G ABX 2,3 2,3 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 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.

2.75,3.25 MEV

Tabic 4. Properties of levels observed by photoexcitation. (d<r/dfl)'N* F

: experimental differential cross section per identified isotope or element for resonance scattering through 0 = 90°. I": spin-parity of exerted level; W(9): angular correlation function; g=i2/t , + l)/(2/ f

-i- 1); r0

: radiative groundstate transition width, /": total level width. Errors in the

last digits are given in parentheses

Isotope (MeV)

(doidi2) N*F

(pb/sr) r r^r me) g r0

2 (meV) r r0

< (meV)

1r*0 (meV)

22a U 2.754 13 (4) m 0.77 0.145 0.084 _

22a 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 b -

20, Bi 7.168 1.7 13). 10 5 9/2** 1.00 710 786 820 (40)*

203T1 6.418 8.75(30)- 10 2 1/2* 0.28 30 102 82 (15)* T! 6.759 7 (3) - - - - - Hg 6.555 68 (17) - - - - -

1 6.418 5.2 (3)- 10 2 1-* 0.32 1.75 2.4 -

184w 6.555 9.8 (10) to 2 (1) 0.52 3.44 2.9 -

18 *W 6.759 46 (101 (1) 0.58 0.17 0.13 - mTa 3.010 174 (17) - 0.72 0.42 0.59 -

191 Ta 6.418 62 (4) - 0.73 0.2 0.27' - mTa 6.759 4.8 (12) - - 0.018 0.018'* -

1<,5 Ho 6.418 10.3 1 30) - - 0.035 0.035** - 1M 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) - - - - -

,2l Sb 3.452 2.20 (5). 10 2 - 0.60 2.9 4.9 6 -

l0O Mo 6.418 1.53 I4i- 10* 1-* 0.88 52 26 25 (8)* ’*Mo 6.555 4.4 (4)- I0 2 (1) 0.33 15 21 - Mo 6.759 6.2 (15) - - - - - Mo 7.168 8.2 (26) - 10 2 - - -

1 [11] b lV(01gro/T=l assumed ‘ W(0)g = l assumed

* [23] (a small correction has been applied to the data of [23])

* Upper limits in case not all the transitions to lower levels were observed

' Present work • Previous work (OVER)

FORM

(REV. ?• 14.04) USCOMM-OC 24010.P64 PHOTONUCLEAR DATA SHEET 176

U.S. DEPARTMENT OF COMMEPCi

NATIONAL BUREAU O F.-'S T AMOAHDS
Table 1. Differential cross sections for elastic scattering [daid Gt"p of photons from 56Co 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 1399 1 (MeV)

2.754 s (MeV)

3.010 s (MeV)

3.202* (MeV)

3.254* (MeV)

3.273* (MeV)

3.452* (MeV)

90 «»u 52.7(25) 57.5(25) c 56(161 47(4) 456 |10) C 34(6) 49(14)

20V B| 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) 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 (61 l,, Ta 20.0(15) 19.2 (6) 193(20)‘ 20(4) 17.3(21) 18(5) 21 (8)

l ‘ 5 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(12)'* 13(3) 9 (6) —Ce 11.1 1?) 11.0 (5) - 11(3) 9.5(13) 8(4) - 1Z7J 8.4(10) 8.6 (5) - 9(2) 2 (1) 5(3) - “‘Sb 8.0(11) - - 10(4) 6.8(19) - I-270(50) c “'Sn 6.5 (7) 7.0 (5) - 5(2) 7.6 (8) 6(3) - “*Cd 6-2 (5) - - 6(2) 6.6 (8) 2(3) -

120 “U 55.1(25) 64 (4)

c 43(15) 55(5) 574 (10)

c 48(5) 48(11)

ls, Ta 27.5(15) 25.0 (9) 227(20) c 22(5) 21 (2) 22(8) - "**Nd 17.9(30) 17.0 (9)

d * - 29.8(47)'’ - -

* 3sCo source in Fe lattice * 24 Na source in Ai lattice (part of data have been published elsewhere)

c Transitions to excited states observed in addition to the ground-state transition

* Ptiotoexcitation of nuclear level identified from the size of the differential cross section

177

•-

•

Y. Oka, T. Kato and A. Yamadera

Bull. Chem. Soc. Japan 41 . Io06 (1968)

METHOO

60

68 Ok 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,N ABY THR- 20 C 20 ACTI

4PI

ISOMERIC YIELD

Table 1. The particulars or the (f.n) reaction products and the data obtained with 20 MeV bremsstraklung

Nuclide

Half-life of product

(sec)

Gamma-ray determined

Limit of

detection

(/*s)

Yield (mol-‘-R-‘) Parent

(Natural abundance, %)

Residual Energy

(MeV)

Branching

ratio (%)

Photopeak

activity (cpm/mg)»>

»*Mg<78.60) aMg 9.9 0.511 200 2.04X 10* 0.49 8.1 x 10* ’»Ge<7.67) TSmGe 48 0.139 100 6.37 x 10» 1.6 1.1x10*

TMSe(23.52) n“Se 17 0.162 100 1.82x10* 0.55 1.2x10*

«Mo(15.86) •‘“Mo 65 0.650 57 2.22x 10* 4.5 2.7x10*

>**Ce(88.48) illmQ, 56 0.745 100 1.06x 10* 0.95 1.3x10*

‘•*Nd(27. 13) “•Nd 64 0.760 100 3.19x10* 3.1 1.4X10*

l **Tb( 1 00) “*“Tb 11 0.111 100 2.56x10* 3.8 2.2x10*

a } The value corrected at the end of one-minute irradiation with the dose rate of

107 R/min; Counting geometry is 20% with a 3"dia. x3M NaI(Tl) detector.

form MBS-418

(REV. 7-1 A-MI U1COMM.OC 2S010-P64 PH0T0NUCLEAR DATA SHEET 181

u.s. department of commerce

NATIONAL BUREAU OF STANCARDS
REF.

P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. Veyssiere

Nucl. Phys. A172 , 437 (1971)

ELEM. SYM.

Nd 142 60

METHOD REF. NO.

71 Ca 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTO R ANGLE TYPE RANGE TYPE RANGE

G.N 'S'U ABX 10- 2Q D 8-20 MOD1

4 PI G . 2N 3^-r ABX 10-20 D 8-20 MOD1

4 PI

J7/T

Table 2

Parameters of the one- or tuo-Lorentz line fits to the trr curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results IJ

) are also shown

Ce “‘Nd “3 Nd “4Nd “5 Nd “4 Nd “•Nd 150Nd Er

<r, (mb) 360 ±15 359 ±15 360 ±15 317 ±15 297 ±20 308 ±16 263 ±15 174 ±20 225 ±15

A (MeV) 4.35 ±0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 ±0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

Ei (MeV) 15.0 ± 0.10 1 4.95 ± 0.1 15 ± 0.1 1 5.05 ± 0.1 15 ± 0.15 14.8 ± 0.1 14.7 ± 0.15 12.3 ± 0.15 12.00± 0.1

<Tj (mb) 223 ±20 260 ±15

A (MeV) 5.2 ± 0.15 5.0 ± 0.05 Ex (MeV) 16 ± 0.15 1 5.45 ± 0.1

1 .-tor MeV b 2.5 ± 0.2 2.54± 0.2 2.6 ± 0.2 3.0± 0.3 2.9 ± 0.2 3.0± 0.2 2.7 ± 0.3

1nar

0.06 NZA-'

1.20± 0.10 1.22± 0.10 1 .25 ± 0.10 1.4± 0.15 1.35± 0.10 1.4± 0.1 l.27± 0.15

13

R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Nucl. Phys. A133 , 417 (1969).

PARTIAL CROSS SECTION OF NE00YMIUH 142

FI*. 2. Partial photoneutron cron sections a(y, n) and o(y, 2a) of 141Nd. (over)

form N3S-418

(R EV . 7-1 641 USC OMM«OC 260 1 0- P54 PHOTONUCLEAR DATA SHEET 182

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3UREAUOF STANDARDS
PHOTCnuClUH CPOSS-SCGTIOnS

. .-f -

Fig. 9. Total photonudear cross-section <rT of neodymium isotopes. The Tull line drawn through

the experimental points is merely meant to facilitate the identification of structure.

183
REF.

P. E. Haustein and A. F. Voigt

J. inorg. nucl. Chem. 2)3, 289 (1971)

ELEM. SYM. A

Nd 142 60

METHOD REF. NO.

71 Ha 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.N RLY 10-70 C 70 ACT -I 4 PI

Isomer ratio = (yield to low spin state)/ (yield to high spin state) ISOMER RATIO

Tabic 2. Isomer ratio measurements for*'Mo. '”Ce. and "'Nd

Reaction Isomer r /• r Threshold 4 M -

ratio Target 0 1 Isomer (McV) (MeV)

state nMo<y, <i(" Mo I-92s0-I5 0-

9/2 1/2-

13-13 '6-60 WMo I59s:0l6 0* 30-72 16-52

'*Ce<y. R>‘”Ce 31 0*

3/2- 11/2*

10-31 15-30

-Ce(y. 3«)'”Ce 110-012 0* 26-34 15-26 . ‘•NcKy, n)M, Nd 5-2:tO-3 0* in* 1 1/2-

9-79 13-22

“•Ndty. 3a>M, Nd 1-80-0-23 0* 23-67 1517

form N3S-418

(R EV. 7-14-64) USCOMM-OC 2601 0-P64 PHOTONUCLEAR DATA SHEET 184

u.s. departmentof commerce

NATIONAL BUREAU OF STANDARDS
. _ •.

D. W. Madsen, L. S. Cardman, J. R. Legg, C. K. Bockelman

Nucl. Phys. A168 . 97 (1971)

I EL EM. SYM. A

I Nd 142 60

REE. NO.

j

! 71 Ma 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

Type range TYPE RANGE

E,V FMF 1,2 D 60 MAG-D DST

- . 1-1.57. 2=2.09

Fig. 14. Inelastic form factors for the 2* level at 1.57 MoV in ,4, Nd

as a function of inelastic momentum transfer. The experimental points are the findinp of this experiment and the solid line is the best fit obtained with the parameters shown.

Fig. 15. Inelastic form factors for the excitation at approximately 2.09 MeV in ,41 Nd. The experimental points are the findings of this ex- periment while the solid line through them represents the best fit obtained by an addition of the L =* 2 and L => 3 curves shown. (L is the

transition multipolarity.) The individual fi(£Lf ) values are given in the

figure. See text.

r over ;

:AR DATA SHEET 185

u.s. oepartmentof commerce

NATIONAL. 0UREAUOF STANOABOS
Table 11 A comparison of this experiment's B(ELl

) values with those of other experiments and theory

Nucleus State This Pulsed Heavy particle Theory

(MeV) work beam Coulomb excitation

2* states

,4J Nd 1.57 13.1 ± 1.7 25.0 ± 7.3*) 16.4 0

19.1 ± 2.3 ») 16.3 •)

1 5.5 ± 7.8 •) I4INd 2.09 4.1 ± 1.1 ,4*Nd 0.45 30.9 ± 4.6 28.5 ± 0.4 *) 92.1 0

28.1 ± 6.6*)

,5#Nd 0.13 62.9 ±10.5 113.9±1.8 f) 1 12-7± 4.2')

11 6.8 ±3.2 ») 112.4±5.I *)

3* stats “*Nd 2.09 28.6 ± 5.0 52 ±210

•) Ref. ”). ») Ref. 40

).

c ) Ref. **). 4

) Ref. ”). •) Ref. 42

). 0 Ref. 4

»).

•) Ref. “). *) Ref. 4S

). ') Ref. sr). ') Ref. »»).

•3 30. Hansen et al.,Nucl. Phys. £2 (1963) 197.

^ L. S. Kisslinger et al.,Rev* Mod. Phys. 25 (1963) 853.

33

J. Bjerregard et al., Nad. Phys. (1963) 280.

39G. A. 3urginyon, Thesis, Yale University (1967) unpub.

^D. Eccleshall et al., Nucl. Phys. 78 (1966) 481.

"ri0. Nathan et al., Nucl. Phys. 21 (i960) 631.

^M. Rho, Nucl. Phys. 65 (1965) 497.

43

J. D. Kurfess et al., Phys. Rev. _l6l (1967) 1185.

u

"F. W. Richter et al., Z. Phys. 212 (1968) 202.

"^M. Birk et al., Phys. Rev. 116 (1959) 730.

186
nEF

K» Shoda, T. Saico, M. Sugawara, H. Miyase, S. Oikawa, A. Suzuki

Phys. Rev. C4, 1842 (1971)

ELEM. SYM.

Nd 142 60

METHOD REF. NO. 71 Sh 3 hmg

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE E.P ABX 15-22 D 23 MAG-D 90

ISOBAR! C ANALOGS

The energy distributions of protons from the {C.u'p i reaction on .V = 32 nuclei with even Z

have been measured. The cross sections of the (y.^ 0 />,) reaction have been estimated. Two

prominent isobanc analogs have been found in each nucleus. The results were used for the systematic d.scussioa of ue odd-odd parent nuclei IMCs, u0 La, u: Pr. aixi u< lTn. The 1”

states are estimated at fiOO ind -2500 kcV for 138 Cs. 500 and 3000 keV for wa La, 1100 and 3700 keV for u"Pr, and 1400 and 4300 kcV for l,< Pm. The parameters of these states are dis- cussed in terms of a quasiproton and single-neutron model.

0< "

8a

C, ’23.0 MeV

C.V ” 04 >

10„ ». • .

• J

,tr Te£-*230 MeV A;„'. m

I

>•

¥ i E«=22.5 MeV

-N*. .. 5

1 1 2

Sm

£ e

*2i.5 MeV

‘1

3- 1

1 1—

4 S 3 i 0 2 .4 16 PROTON ENERGY (MeV)

FIG. 1. Energy distributions of protons emitted from

die (s.c'pj reaction at 0“9O*.

G

B

o

» i 1 1

i 14 16 18 20 22 Ex (MeV)

FTG. 2. The photoproton emss sections for p a *Pi at

0 = 90* ir. the vicinity of the isobaric analog resonances

.

The curves for tho broad resonances were obtained from

the fitting of the interference formula. (over)

FORM NBS-418

<R EV. 7-1 4. 64 ) USCOMM-OC 260 I 0-P64 PHOTONUCLEAR DATA SHEET 187

U.S. DEPARTMENT OF COMMERCE

N ATION A t, BUREAU OF STANDARDS
Nn JL

E* (MeV)

6 4 2 0

4

2

0

HO

Ce 21.0 MeV -20.0 MeV.

1 J\ i Nw

1 i'"'

: L _

i '•iR.liii ’ .i* »

, v

r r, : «***: • 1 ^«

10 12 14 E

No 3

4

142 Nd j 20.1 MeV- 19.6 MeV j !|!,f

i

,i!

iliit I ; N» I

l! lit i , li l.|'iii!

s ! h i.

tt'i 1

/4‘j* viLHi' •. V ;i 'Ihl !

l !fri lM ^

ii, ii’lill r L

i'

T^—

I

8 10 12 Ep (MeV)14

FIG. 5. The proton groups emitted through the isobaric analogs at 20.3 MeV in M0Ce and at 20.3 MeV in u: .\'d. The energies of the residual states are also indicated by *«•

188
M. Hasinoff, G.A. Fisher, P. Kurjan and S. Nucl. Phys. A195, 78 (1972)

METHOP

S. Hanna

EL EM. SYM.

Nd 142 60

REF. NO.

7 2 Ha 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

P.G ABX 14-24 D 6-17 NAI-D DST

E, (M«V)

Fig. 3. fa> Differential yield curve of 1 *‘Pr(p,; , 0 ) ,4I Nd at 9.

f = 90 :

. The line drawn is merely to guide the eye. (b) The 1 ‘ : Nd(e, e'p0 — Pi) l4l Pr data of ref. I5

).

^K. Shoda et al. , Phys. Rev. C4

(1971) 1842.

19

P. A. Moore et al. t Phys. Rev. 180

(1969) 1213.

20_ ^

• G. Clausnitxer et al. , Nucl. Phys.

A106 (1968) 99.

21

P. Von Brentano et al. Phys. Lett.

17 (1965) 124.

22

h. Ejiri et al. Nucl. Phys. A128

(1969) 388.

Table 2 Resonance parameters obtained for three of the 1 ”, T> analogue resonances observed in l4, Pr(p.Vo) ,4J Nd

E, (MeV)

£

.

(MeV) rOteV) r r

(keV*) ^A - 6ck

(deg.)

10.18 17.30 79± * !.! ±0.3 - 20-10

5.9 ±1.9 — 1 20 ±15

11.20 18.30 220 ±30 0.55 —0.28 - 25 — 10 35 ±18 -120-15

12.59 19.73 180±20 6.5 -2.0 - 20-10

42 ±13 — 1 1 5 ± 1

5

For each resonance the first solution is given on the first line and the alternative solution on the second line. The errors for r»JTyt include both the fitting errors and the estimated error in the determination of the absolute cross section (» 30%).

(over)

porm N8S-418

(R EV. 7-1 4. 64) USCOMM.OC 200 1 0* P64 PH0T0NUCLEAR DATA SHEET 189

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOP STANDARDS
*¥(»,£>

£. (M«v) in ,<lNd

Fig. 4. Differential yield curves of l

't, Pr(p,“>, l +;, j”) , '‘ : N'd and l4, Pr(p, at 0

r = 90*.

Fig. J. Angular distributions in 14l Pr(p,

y

0 ) ,4I Nd measured on and off the three upper

resonances. The on-rcsonance measurements are at Ev = 10.2, 1 1,25 and 12.6 MeV. The curses are

fits obtained uith the series 1 -a l Pl i-aiPi- The values of a, and are listed in each case.

Tabu 3 Comparison of radiative strengths for the two strong l", T>

levels in 14INd

f, (MeV) r r /r*>

(eV) ^r.(r„+rn

)/r»)

(eV) r1 *i r» ’ (eV) r *) (eV) rl *) T 1 (eV) r*/2(r,+i)

(eV)

10.18 13.8± 4.1 75 ±25

6-7-1 69 ±22 4

) 375 ±130 4

)

20 ±3 4

) 13± 5 62 ±26

680

12.59 37 ±11

230 ±71 58±2 530±160 *) 3300±1000 *) 580 ±20*) 1000

*) Present work. The second line in each case corresponds to the alternative solution.

“) Ref. **).

c

) The El strength of the 2fj -* 2d^ transition in 140Ce(p,y0 ) ,4, Pr [ref. “)J.

a

) If rv<jT s: 0.2 as obtained from refs. An estimate for of 0.5 r,jr\s used.

') If r,,)//' s: 0.10 as given in ref. ,s

). An estimate for /’

Pl/f of 0.5 is used.
K. Shoda, M. Sugawara, T. Saito, H. Miyase, A. Suzuki, S. Oikawa,

and J. Uegaki

PICNS-72, 321 Sendai

ELEM. SYM. A

Nd 142 60

REF. NO.

72 Sh 10 hvm

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G^P ABX 15- 22 C 15- 22 MAG-D UKH

I A STATES

Fig. 11 The (y,p) cross sections of

9

8

Sr and 142 Nd. The (y,pQ ) and (y ,n) cross sections are also shown.

FORM N3S-418

(R EV. 7-1 4-641 USCOMM-OC 26 0 1 0* PSA PH0T0NUCLEAR DATA SHEET 191

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

METHOP

T. Salto, S. Oikawa, K. Shoda, M. Sugawara, H. Miyase,

A. Suzuki, and J. Uegakl

PICNS-73, Vol.I, p. 199 Asilomar

Nd

REF. NO.

Z

142 60

73 Sa 7 hmg

REACTION RESULT excitation ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,P ABX 13- 26 C 15- 26 MAG-D UKN

Fig. 2 Total ct(y,p) from yield curve.

Fig. 3

form N3S-418

'REV. 7.1 4-64) USCOMM-N0S-GC PHOTONUCLEAR DATA SHEET 192

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
REF.

J. Tenenbaum, R. Moreh, and A. Nof

Nucl. Phys. A218 , 95 (1974)

C. L. tM . }IM.

Nd 142 60

METHOO REF. NO.

74 Te 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.G LJT 6 a 1 00 SCD-D dst

6=6.877

Tadle 2 Measured angular distribution coefficients A lt the ratios V||/Wj_, the spins and parities of the ground

and the resonance levels, Ja” and J," , and the character of the ground state transition

Scatterer Ey (keV) A2 TYu/ATj. k J,w Transition

55 Mn 7491 0.0I±0.02 1.00 ±0.02 1- }

,40Ce 5660 0.51 ±0.02 1.14±0.04 0* 1- El

‘**Pr 6877 0.11 ±0.02 0.95 ±0.03 i* i* Ml

,42Nd 6877 0.51 ±0.03 1.10±0.04 0* 1- El

202 Hg 4922 0.51 ±0.02 1.18±0.03 0* 1- El

20 *Bi 5603 0.06±0.02 0.97 ±0.02 *- Ml

Tadle 4 Values of r,r0 and the energy separation <5 (between the incident y-line and the resonance le/cl) as obtained from the analysis of the various experiments

Scatterer (keV) r

(meV)

I'o (meV)

<5 (cV) D

(cV) *ct X’mi (10- 9 MeV2

) (I0- 9 McV- J

)

55 Mn 749

1

450 ±250 80 ± 40 17 ±1

“°Ce •) 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

l4J Nd *) 6877 340 ± 40 270 ± 20 12.4 ±0.3 1200 26

202 Hg 4922 300 ± 50 260 ± 20 4.2±0.5 19000 3.4 20, Di •) 5603 950±200 950 ±200 13 ±1 34000 160

The radiative strengths >fej and /f^i arc also given. The Icvci spacing D refers to the excitation energy of the rcsonunce level /Tv . *) These values arc slightly different from those of ref. *) and were obtained front a renewed

analysis of the experimental results.

(1972).

Fig. 5. Angular distributions of elastically scattered y-lines from 34 Mn and 142Nd. The distributions of three inelastic y-lines from 14J Nd are also shown. The solid lines have the form 'rf'(S) = 1 +AiPt (cos 6) and arc least squares fits to the experimental distribution. In each case the corresponding y-y

cascade is indicated.

193

U.S. DEPARTMENT OF COMMERCE

NATIONAL 0UREAUOF STANDARDS
ref. A. Schwierczinski, R. Frey, E. Spamer, H. Theissen,

and Th. Walcher

Phys. Lett. 55B , 171 (1975)

EL EM. SYM.

Nd 142 60

REF. NO.

75 Sc 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E.E/ NOX 5- 28 D 50, 64 MAG-D 93

Inelastic electron scattering has been used to study the isoscalar E2 giant resonances in 142 Nd and ls0 Nd, which

were found at excitation energies of 12.0 and 1 1.2 MeV with total widths of 2.8 and 5.0 MeV, respectively. The energy shift and the larger width in ls3 Nd indicate a splitting due to the deformation of l50

N«l.

E, E/SPECTRUM (E2)

Fig. 1. Spectrum of inelasticaily scattered electrons after subtraction of radiation tail and background, a) 142 Nd,

b) 1S0 Nd (open circles). Solid line: El cross section. Full circles; El cross section subtracted. The total number of

counts

/

mC in the region of the giant resonances is about 100.

roRM N3S-418

IR EV. 7.1 4.641 uscoMM-Nas-oc PHOTONUCLEAR DATA SHEET 194

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REP. H. Bartsch, K. Huber, U. Kneissl, H. Krieger

Nucl. Phys. A256, 243 (1976)

ELEM. SYM.

Nd 142 60

METHOO REP. NO.

76 Ba 1 jgf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N RLY THR-UKN C UKN SCD-D 4PI

ISOMER RATIO

Table 1 Experimental and theoretical results

Process Targetspin <&>T*Spin

high

Spin low

Q

^hlf* —

SCOP (A)

‘•»Ta(y, 3n) i 93 2.2 h

9.31 mia

8.15 h

7- 1 + 0.51 ±0.09 3.6 ±0-2

“JNd(y, n) 0* 755 63 s i

0.055 ±0.006 2.20±0.06

1100-1300, 2.5 h 0.19 ±0.01*)

145

•3 Mo(y, n) 0* 6523 66 s i* i" 1.03 ±0.21 5.03 ±0.75

1208, 1508, 15.49 min - 0.85 ±0.07 »)

1581, 1637 1.92 ±0.15*)

‘"“MoCy, n) 0* 97.3 16.8 /a r 0.85 ±0.24 1.72 ±0.25

140-5 66.02 h

10,Pd(y, n) 0* 214.5 22s i- 0.5 ±0.2 3.4 ±0.5

115 850 ns

» ,0Pd(y,n) 0* 188 4.7 min i* 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 r 3.2 ±0.7 3.3 ±0.4

•*Y(y. n) i- 231.7 14.2 ms 8* i* 0.055±0.008

442.3

392.5 300 fa

•) Re/. 1 ‘). ») Ref. l5

). 14 P.E. Haustein et al., J. Inorg. Nucl. Chem. 33., 289 (1971)

15

J. H. Carver et al., Nucl. Phys. 37, 449 (1962)

form N3S-418

(REV. 7-1 4-64) USC OMM-N B S-O C PHOTONUCLEAR DATA SHEET 195

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
T. Saito, S. Oikawa, K. Shoda, M. Sugawara, H. Miyase,

and A. Suzuki

Phys. Rev. C 16., 958 (1977)

EL EM. SYM.

Nd

A

142

z

60

METHOD REF. NO.

77 Sa 5 hmg

REACTION RESULT excitation ENERGY

SOURCE OETECTOR

angle

TYPE RANGE TYPE RANGE E,P ABX 15-26 D 15-26 MAG-D DST

The reaction w:Nd(e,«'p)wl Pr has been used to study the T> giant resonance in U3Nd. Cross sections for

he Iii Nd(y,o)“ 1 Pr and u: Na(y,p0 + Pi)

:,1 Pr reactions were measured for excitation energies from 15.9 to

6.0 MeV. These cross sections are compared with previous u-

, Pr(j> >y#)

143Nd data. The angular distributions

er the larger resonances at 17.3, 19.7, and 22.9 MeV were measured. Analysis indicates that ti e 22.9- M;V stale has aboa; a 13% tz component, me decay proton spectra irotn uir iy.»- <mu

resonances wire analyzed with a schematic shell model and indicates that the core excitation process is dc.mimv. in these isobaric analog resonances. The measured (y,p) cross section together with the (y,*)

--nss section is found to be fairly consistent with the predictions of isospin splitting theory.

FIG. 2. (a) Differential cross section for the ,KN'd;y,

?

; e-pl) ,;l Pr reaction at 9

p =125.3’. The line drawn

is merely to guide the eye. (b) Differential cross section

for the : **Fr(p,ya) 14 *'»'d reaction a: f 7 =90’ from Rof. 7.

EXCITAfiON ENErtGY IMeV)

F!G. *. Differential cross section for the ";Nd(y,

p)’ :i Fr reaction at 6 = 125.3’. The vertical error bars

indicate cross section error estimates, v>iii!e the horizontal bars indicate the minimum full width at half- maximum allowed in the analysis.

-a 3

f,i

JKd{».ep}”‘Pr

15 IS 17 IS 13 20 21 22 23 24 25 26 ELECTRON ENERGY (MeV)

FIG. 3. Differential cross section for the nlNd(<?, Pr reaction a: 5 = l23.3J

. The statistical errors

of the cross section are smaller Chart the sire of the circles. Toe arrow- indicates the position of a big break.

FIG. 6. Angular distributions for the ground-state

transitions from the resonances and the continuum are shown on the left and right hand side, respectively. In the figure the energies of the proton group are shown. For the 10.0- MeV proton group the results for different bombarding energies are shown. In fo) the angular dis- — tribucions of .1 and A +

3

correspond to those of the proton groups indicated in Fig. 5. The solid curves show

TC the Legerdre polynomial fits. 196

1 “ OJ n .« •

(over)

. DEPARTMENT OF COMMERCE

3NAL RURCAUOF STANDARDS
TAULK I. KxHtnttnn energies, Integrated cross sections, radiative strengths.

<>./»•

F.t <M.

<>./>*+/> i>*

•V>

(/>. Vo>* (/>./!)* J

1

'• *(y. />)<(£* (mb Mi-V) r«* r iAs o

(iV) OV)

iti.:. IS. HO 111.

9

:i.:» 1 1 0 711 J 2.1

17.4 17.3 17.33 17.1 4.1 ±1.2 1101.20 <:•:> t .’2 18.9 19.5 18.43 3.8 ±i.t 120 *40

19.9

21 .7 22.9

19.

G

21.9

19.71 22 ±7

1.2 ±0.G

23 ±7

7G0 ±230 530 ±1G0

49 ±25 1100±300

•>nd Inunchlng ration [or tin- I'slites in M? Nd. J <r*(y.l>„ ly, r IV »

(inti MeV) (mb McVl T

o.ao ±0.15

0 . 3-1 ±0.08

2.9 ±0.4

0.29 ±0.09

0.79 ±0.14

3.1 ±0.4

0.20 ±0 07

O.UO i().o;j 0.13 J 0.04

0.24 ±0.1 i

‘Present data.

* Reference 7. 'Reference 19. Reference 3. J <J*(y,pt + Is corrected for tho measured ungulnr distribution. TABLE II. Coefficients ohtaixed from weighted least squares fit.- of the angular distributions for the ground-state

transition to Legendre polyrctr. Cals.

E, (MeV) E,

ClcV)

Present work

*:

Hashinof; cf cl. (Ref. 7) *1 <*j 10.0 17.2 0.10x0 15 -0.34x0.13 0.37x0.23 O.0S -0.31

10.0 17.3 0.03 ±0. OS -0.32x0.05 0 . 12 x 0.10

12 . 2

* 19.6 0.25x0 09 -0.44X0. 03 0.20x0.14 0.09 -0.58 12.3* 19.6 0.19x0.11 -0.57x0 10 0 10x0.15

9.7 10.7 17.0 ls.0 0.35x0.09 -0 20x0.03 0.05x0.13

14.7 13.7 22.0 S 23.0 0.G3 ±0.03 -0.13x0.02 0.02x0.04

15.7 S£,s 1G.7 23.0 S2,S 24.0 0.99x0.07 o.cexo.oo -9. 04=0.10

*11.9 4 13.2.

TABLE m. Coefficients obtained from weighted least squares fits of the angular distributions for the 17. 3-, 19. 7-, and 22.9-MeV resonances.

Ex

(MeV) <*t <*: <*J

17 3 9.7a?£-

# < 10.3 0 29x0.05 -0.22X9.05 0 . 10 X 0 03

19.7 22.9

4.7«£,S 10.8 0.13 xO.Ol 0.15x0.11

C. 62X0. 18

-0.16x0. 01 -0.29x0.10

-0.27 xO.17

-0.01 xO 02 0.22x0.16 -0.42X0.28

TABLL IV. Comparison of the experimental energy

separation and relative strengths for T< and T, giant resonance '

1

with. the theoretical uedietions. 1

t

<r/.p)

x (y.*)* Theory B

EP 'MeV) 19.7x0 .2“ 14.95X0.1 2l.li0.3* J nJE (MeV mb) 33 x 10

19-50 x 150

59X13* 2050 x 170*

r.[ (mb) 1.7X0.5-* 130x10*

2.S xO.S * 135x11* £>-£< (MeV) 4.8x0.2 tf 5 1 6.2 ±0.3*

ff-;(T>) 0.013x0.004* 0.035

0.021 ±0.017*

‘Present work. ‘Reference 1?. 'Reference 2. i E>

Is evaluated by fu:°tT(y.p)JE/ f irloMy./O/^ldE-

*£, is evaluated by /fcMy,p)JS/ f\V.lMy.p)/E]dS. 1 Litegtatei energy regions are 17.0-22.0 MeV and

3 a-22.C M=V tor fc,p> and (y.n) reactions, respectively. IQ7

*i.itegmtec energy regions are 17.0-26.0 MeV ard

9.5—26.1 I!-” ::r > and reactions, respectively.

FIG. 9. Angular distributions for (a) 17. 3-, (b> 19. 7-,

•nd I:) 22.9-MeV resonances. In (a) crosses and cirles show the argular distribution for the grcucs \ : ; ^ 7se for totai protons, respectively, observed in

” - ar-3~en: of £# = 13.0 MeV. The solid curves shew

Legendre polynomial fits.
F.R. Metzger

Phys. Rev. C ] 8 , 1603 (1978)

EL EM. SYM;

Nd 142 60

METHOD REF. NO.

78 Me 8 hg

REACTION RESULT excitation ENERGY

SOURCE OETECTOR

ANCLE

TYPE RANGE TYPE RANGE

$ G,G LFT 1- 5 C 1- 5 SCD-D DST

-

The resonant scattering of electron bretnsstrahlnng by an enriched sample of UJNd has been studied for POL SCD GAMMA

photon energies of up to 5 MeV. It provides estimates of the radiative widths for 13 levels. Based on the

relative yields at scattering angles of 96’ and 126*, unambiguous spin assignments were made to 6 of these

levels. Where feasible, the yield measurements were supplemented by self-absorption data and by linear

polarization studies. For the strongest excitation, at 3.423 MeV, the resonance fluorescence experiments led

to its identification as a 1“ state with a radiative width T0 = 370 ±43 MeV. The corresponding E 1 strength

is comparable to the £1 strengths measured in other even-even N m 82 nuclei for the 1“ member of the

quintuplet arising from the coupling of the lowest octupole vibration to the 2* leveL The sum of the

excitation energies of the 2* state and the 3f state in l4JNd is consistent with such an interpretation of the 3.425-MeV level

TABLE I. Spins and widths of mNd levels , deduced from the yields of the reaction 1<2 Nd(>,7) at scattering

angles of 96* and 126°. Standard deviations are listed throughout.

(MeV) N(126*)/N(96“) Spin

iy/r

(meV)

1.576 (2) 0.45 ± 0.05 2 4.0 ± 0.3 2.385 (2) 0.52 ± 0.10 2 2.4 ± 0.4 2.583 ... 1* 0.6 ±0.7

2.846 (2) 0.40 ± 0.06 2 11.5 ± 1.0 3.046 (2) 0.34 ±0.36 (2) 1.4 ± 0.6 3.128 ... 1, 2

B 0.6 ± 0.9 c

3.358 ... 1, 2

6 0.1 ± 1.0 c

3.425 (2) 1.19 ± 0.07 1 330 i 40

4.095 (2) 1.20 ± 0.11 1 110 ± 20 4.145 (2) 1.09 ± 0.13 1 85 ± 15 4.255 (4) 1.5 ±0.8 1,2 20 ± 7

c

4.625 (3) 1.10 ± 0.24 (1) 100 ± 20

4.901 (3)

* * * 1,2 80 ± 30 c

*See Ref. 15.

5 According to Ref. 6.

C A spin of 1 (g = 3) was assumed in calculating this width.

TABLE n. Self absorption by 11.87 g/cm2 of Nd metal

(natural composition), i.e., by 1.35 xlO22 u:Nd nuclei/

£i»TMi

A

r (res. absorber) A

r (comparison abs .) r0 (meV>‘

3.425 0.52 ±0.02 355 ± 30

4.095 0.82 ± 0.09 150 ± 100

4.145 0.87 ±0.13 110 ± 130

1 Assuming rj/r=l.

TABLE E. * 42 Nd: Results of the experiments using

the Ge(Li) polartmeter.

E (MeV) n„-n,

100 x ——LA

tfn +ttL

Multipole character

3.425 +1.9 ± 1.6 £1 1* 4.095 -2.1 ± 4.2 Ml slightly favored

1*

4.145 +8.9± 4.8 (£1) 1<*>

S. Raman, J.L. Foster, Jr., 0. Dietzsch,

D. Spalding, L. Blmbot, and B.H. Wildenthal,

Nucl . Phys. A201 , 21 (1973)

J. Tenenbaum, R. Moreh, and A. Nof, Nucl.

Phys. A218 , 95 (1974)

porm N8S-418

(R EV. 7-1 4-441 USC OMM-N SS-D C

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARD3 PHOTQNUCLEAR DATA SHEET 198
i€)

A=1 43

‘

•

199
200
REF.

P. Carlos, H. Beil, R, Bergere, A. Lepretre, A. Veyssiere

Nucl. Phys. A172, 437 (1971)

EL EM. S YM. A

Nd

method

143

REF. NO.

71 Ca 1

60

egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.N VI 4 ABX 9-20 D 8-20 MOD1

4 PI G.2N 33S + ABX 9-20 D 3-20 MOD1

4 FI

Table 2

Parameters of the one- or two-Lorentz line fits to the <rT curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results **) are also shown

Ce “*Nd 14JNd *Nd 5 Nd “‘Nd “•Nd 150Nd Er

cr, (mb) 360 =15 359 = 15 360 ±15 317 ±15 297 ±20 308 ±16 263 ±15 174 ±20 225 ±15

r, (MeV) 4.35=0.05 4.43 = 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 =0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

£, (MeV) 15.0 = 0.10 14.95 ± 0.1 15 ± 0.1 1 5.05 ± 0.1 15 ± 0.15 14.8 ± 0.1 1 4.7 ± 0.15 12.3 ± 0.15 12.00± 0.1

<j% (mb) 223 ±20 260 ±15

T, (MeV) 5.2 ± 0.15 5.0 ± 0.05

£, (MeV) 16 ± 0.15 1 5.45 ± 0.1 liar MeV b 2.5 ± 0.2 2.54 ± 0.2 2.6 ± 0.2 3.0 ± 0.3 2.9 ± 0.2 3.0± 0.2 2.7 ± 0.3 \naT

0.06 nza - • 1.20 = 0.10 1 .22 ± 0.10 1 .25 ± 0.10 1.4± 0.15 1 .35 ± 0.10 1.4± 0.1 . 1.27 ± 0.15

13

R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Sucl. Phys. A133, 417 (1969).

PPRTlflL CROSS SECTION OP NEuOYMlUN 143

Fig. 3. Partial photoneutron erosa sections <r(y, n) and aiy, 2n) of “*Nd. (over ) form N3S-418

(REV. 7-t 4-441 USCOMM-OC 28010.P84 PH0T0NUCLEAR DATA SHEET 201

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
photcx:.:ar cRoss-sECTions

Fig. 9. Total photonuclear cross-section cT of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure.

202
A= 1 44

;id

A=1 44

Md

A= 1 44

203

J.P. Blanc, M. Lambert, C.F. Perdrisat

Helva. Phys. Acta 36, 820 ( 19^3

)

Nd 1W. 60

METHOD REF. NO. Radioactive source; photon scattering

63 Bi 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G ABX 2 D 2

(2.18)

a = (0.26±0.l8) 10"2? cm^/atom

,-14 Ll 1.4- x

10' ^ ^ t 2 3,k x 10 sec.

form HBS-4H IMV. 7-14.64) USCOMM-OC 26010-P44 PHOTONUCL EAR DATA SHEET 205

U.S. DEPARTMENT OF COMMERCE

NATIONAL 9UAEAUOF STANDARDS
P. Rice-Evans

Proc. Phys. Soc. 82, 914 (1963)

EL EM. SYM.

Nd 144 60

METHOD

radioactive source; photon scattering; Nal spectrometer

REF. NO. 63 Ri 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 2 D 2 NAI-D 90

(2.18) ( 2 . 18 )

CJ 1.93 x 10

-28 2 cm SEP isfaps. G-WDTH

r = 0.033 eV

Lifetime T £ (2.0±0.4) 10

-14

sec.

Figure 3. (a) Scintillation counter calibration; the 2-18 Mev y ray as observed with the source in the position of the scatterer. (6) Actual pulse height distri- butions: (1) with source and scatterer present, (2) with only scatterer present (for 10 000 minute counting time), (c) Excess counts due to presence of 14«Nd source (for counting time of 10 000 minutes).

form NBS-418

(REV. 7-14-441 use OMM-DC 2®010-P«4 PHOTONUCLEAR DATA SHEET 206

U.S. DEPARTMENT OF COMMERCE

NATION AL*3UREAU OF STANDARDS
REF. F. R. Meczger

Phys. Rev. .137, 1700 (1969)

C.L. CM. O T M.

Nd

A

144

L

60

METHOO REF. NO. 69 Me 3 hmg

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, G LFT 2

? 2. C 2,2 SCD-D DST

(2.074.2.186) (2.174, (98,127)

2.186)

B(EL). 2.074. 2.186

The resonant scattering of y rays has been observed for the 2.186-MeV 1“ state in Xd144

. The electron bremsstrahiung from a Van de Graaff accelerator served as the exciting y radiation. The scattered radiation was observed with a 40-cmJ Ge(Li) detector. If the value r,/T=0.71 is used for the branching ratio, the measured scattering yield corresponds to a partial width I*#— (3.l:fc0.4) X10-1 eV for the ground-state

transition. The reduced £1 transition probability for the ground-state transition is intermediate between the B(£l)’s for the “spherical” nucleus Smi4» and the deformed nucleus 5mu*. A level with spin 2 and with an

excitation energy of 2.074 MeV has also been excited in Xd144

. From the observed scattering, IV/T-

(1.2±0-3) X10-

* eV is obtained for this leveL

form NBS-418

(R EV. 7-t 4-64) use OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 207

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANOARDS
REF.

P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. Veyssiere

Nucl. Phys. A172, 437 (1971)

EL EM. SYM.

Nd

A

144

2

60

METHOD REF. NO.

71 Ca i esf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR — n type range TYp E range

ANGLE G,N 3^*7 ABX 8-20 D 8-20 MOD1

4 PI G , 2N ABX 8-20 D 8-20 MOD1

4PT

- —197+—

Tablx 2

Parameters of the one* or two-Lorentz line fits to the aT curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results **) are also shown

Ce ,4,Nd ,4,Nd l44Nd 145Nd ,44 Nd ,4»Nd ,,0Nd Er

<Ji (mb) 360 ±15 359 ±15 360 ±15 317 ±15 297 ±20 308 ±16 263 ±15 174 ±20 225 ±15

A (MeV) 4.35 ±0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 ±0.4 6 ± 03 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

Ei (MeV) 15.0 ± 0.10 14.95 ± 0.1 15 ± 0.1 1 5.05 ± 0.1 15 ± 0.15 14.8 ± 0.1 14.7± 0.15 12.3 ± 0.15 12-00± 0.1 a2 (mb) 223 ±20 260 ±15

A (MeV) • 5.2 ± 0.15 5.0 ± 0.0S

Ei (MeV) 16 ± 0.15 1 5.45 ± 0.1 \TMr MeV • b 2.5 ± 0.2 2.54± 0.2 2.6 ± 0.2 3.0± 0.3 2.9 ± 0Z 3.0± 0^ 2.7 ± 0J

\naf

1.20± 0.10 1.22 ± 0.10 1 .25 ± 0.10 I.4± 0.15 1.35 ± 0.10 1.4± 0.1 1.27 ± 0.15

13

R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Nucl. Phys. A133 , 417 (1969).

PPBTlfl cross SECTION OF NEOtWIIUH '114

Fig. 4. Partial photoneutron cross sections a(y, n) and a(y, 2n) of I44Nd.

(over)

form N3S-418

(R EV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 208

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
^ v.\.

rnOTC-.:i£AR CROSS-SCCTIOHS

Fig. 9. Total photonuclear cross-section <7T of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure.

209
..-I 'U.fr

REF.

P. E. Haustein and A. F. Voigt

J. inorg. nucl. Chem. 3[3, 289 (1971)

ELEM. SYM. A

Nd 144 60

METHOD REF. NO.

71 Ha 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.3N RLY 24-70 C 70 ACT -I 4PI

Isomer ratio = (yield to low spin state)/(yield to high spin state) ISOMER RATIO

Table 2. Isomer ratio measurements for "Mo. iaTCe. and mNd

Reaction Isomer /• r r Threshold 4 U-*'»

ratio Target Ground Isomer (MeV) (MeV)

state

*, Mn<y./i»,, Mo 1-92*0-15 0*

912* 1/2- 1313 16-60

"Moty. 3n>"Mo l 59*0-16 0* 30-72 16-32

'*Cciy.n)‘”Cc 3-1 0*

3/2* 11/2*

10-31 15-3(1

'"Cely. 3/i),,T Ce 110*012 0* 26-34 15-26

, «Nd(y.n)H, Nd 5-2*0-3 0’

3/2* 11/2*

9-79 15-22

'"Nd(y. 3/i)'"Nd 1-80 * 0-25 0* 23-67 15-17

FORM N3S-418

(REV. 7-14.641 USC OMM-OC 2S010-PS*

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 210
lb

A=145

•

‘
.
c_ _ C. I .ar. J. Ha i pern, and d. G. Muirhead

e- ,18 . 1302-12 (I960) Nd 1^5 60

-H. OBetatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANOK

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

THRESHOLD

Taolx I. Summary and comparison of neutron sqMiration energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies arc expressed in the center-of-mass system in Mev.

Ki'iicliiui No. runs Present results Other results Method Reference

Nd^fy.rONd1*4 1 ^ 6.38 ±0.16 5.97 ±0.19 mass data p

» W. H. Johnson. Jr„ and A. O. NIer. Phys. Rev. 10S. 1014 (1957).

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 A/* Observed threshold Mass data Q value Eu.-Q Excited state energy

CH»(y,r.)Cr« 7/2 12.18±0.14 12.053±0.004" 0.13±0.14 Y»(r.*)Y“ 7/2 11.59±0.08 11.53 ±0.40" 0.06±0.41 0.387*

!n ll *(y,n)In 114 7/2 9.22±0.03 9.35 ±0.43* —0.13±0.43 0.191*

v'c la (y^)Celu (7/2)* 7.24±0.07 6.97 ±0.07' 0.27±0.10 Nd^fy.nlNd144 7/2 6.38±0.16 5.97 ±0.19' 0.41±0.25 0.690* Sm1<,

( 7t »)Smu' 7/2 6.45±0.16 5.87 ±0.28' 0.58±0.33 0.562* Erir, (T.r»)Er1M 7/2 6.65±0.08 6.45 ±0.06* 0.20±0.10 0.081* Hf'n(7.»)HfI7 ‘ 7/2 6.69±0.03 6.28 ±0.06* 0.64±0.07 0.088* HP"(7^)HPt» 9/2 6.31 ±0.07 6.17 ±0.06* 0.14±0.09 0.093* Hf"»(7^»)HPn 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, Rev*. Modern Phy*. JO, 585 (1958).

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

• Henry E. Duckworth. .Viajs Spectroscopy (Cambridge University Pres*. Mew York. 1958). p. 177.

• S. Dielepov and L. K. Pelcer. Atomic Energy of Canada Limited Report Tr. AECL-457 (unpublished).

• The discrepancy in the case of Ce*4* predicts a ground-state spin for Ce** of 0. since the spin of Ceul is known to be 7/2.

' W. H. Johnson, j r.. and A. O. Nier. Phys. Rev. 105. 1014 (1957). W. H. Johnson. Jr., and V. B. Bhanot. Phys. Rev. 107, 6 (1957).

PM MBS-418

. 7.14.^41

U.S. DEPARTMENT OF COMMERCE

NATIONAL eUMKAt'C S T 4 Q A O O * PHOTONUCLcAR DATA SiiccT 213
REF.

P. Carlos, H. Beil, R. Bergere, A. Lepretre,

Nucl. Fhys. A172 , 437 (1971)

METHOD

A. Veyssiere

ELEM. SYM.

Nd

REF. NO.

145 60

71 Ca 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

TYPE RANGE TYPE RANGE

G.N 40 C ABX 10-20 D 8-20 MOD1

4 PI G.2N 401 + ABX 10-20 D 8-20 MOD1

4 PI

mdm

Table 2

Parameters of the ore- or two-Lorentz line fits to the <rT curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results 13

) are also shown

Ce ,41 Nd ,43Nd ,44Nd “5Nd 146Nd ,4,Nd ,50Nd Er

<r, (mb) 360 -15 359 ±15 360 ±15 317 ±15 297 ±20 308 ±16 263 ±15 174 ±20’ 225 ±15

r. (MeV) 4.55-0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 ±0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

£, (MeV) 15.0 = 0.10 14.95 ± 0.1 15 ± 0.1 1 5.05 ± 0.1 15 ± 0.15 14.8 ± 0.1 14.7± 0.15 12.3 ± 0.15 12.00± 0.1

<ra (mb) 223 ±20 260 ±15

T, (MeV) 5.2 ± 0.15 5.0 ± 0.05 Et (MeV) 16 ± 0.15 15.45± 0.1

Ijw.r MeV • b 2.5 ± 0.2 2.54± 0.2 2.6 ± 0.2 3.0 ± 0.3 2.9 ± 0.2 3.0± 0.2 2.7 ± 0.3 faar

0.06 NZAr'

1.20± 0.10 1 .22 ± 0.10 1 .25 ± 0.10 1.4± 0.15 1 .35 ± 0.10 1.4± 0.1 1 .27 ± 0.15

^R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Nucl. Phys. A133 , 417 (1969).

form N3S-4I8

:n ev. 7-t 4-04) USCOMM-OC 20 010* P6 4

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 214
PHOTOHUCLCAR CROSS-SCCTtOOS

Fig. 9. Total photonuclear cross-section <rT of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure*

215
216
I Id

A= 1 46

;id

A=1 46

A= 1 46

217
*

.
REF.

P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. Veyssiere

Nucl. Phys. A172 , 437 (1971)

ELEM. SYM. ; A

Nd 146 60

METHOO REF. NO.

71 Ca 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE range TYPE RANGE G.N 463 ABX 8-20 D 8-20 MOD1

4PT

G,2N + ABX 8-20 D 8-20 MOD1

4pt

Z-r

Table 2 Parameters of the one- or two-Lorenti line fits to the <rT curses Tor neodymium isotopes: parameters for Ce and Er extracted from earlier results * 3

) are also shown

Ce l41Nd ,43 Nd ,44 Nd ,4,Nd 14*Nd 14 *Nd ,S0Nd Er

c, (mb) 360 =15 359 ±15 360 ±15 317 ±15 297 ±20 308 ±16 263 ±15 174 ±20 225 ±15

T, (McV) 4.35=0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 ±0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

Et (MeV) 15.0 = 0.10 14.95 ± 0.1 15 ± 0.1 1 5.05 ± 0.1 15 ± 0.15 14.8 ± 0.1 1 4.7 ± 0.15 12.3 ± 0.15 12.00± 0.1

cx (mb) 223 ±20 260 ±15 r2 (MeV) 5.2 ± 0.15 5.0 ± 0.05

Ei (MeV) 16 ± 0.15 15.4S± 0.1

j.T^r MeV b 2.5 ± 0.2 2.54 ± 0.2 2.6 ± 0.2 3.0± 0.3 2.9 ± 0.2 3.0± 0.2 2.7 -H ©

j.Tcr

t.20± 0.10 1 .22 ± 0.10 1 .25 ± 0.10 1.4± 0.15 1.35± 0.10 1.4± 0.1 1 .27 ± 0.15

0.06 SZA * 1 - ^R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Nucl,, Phys. A133, 417 (1969).

PARTIAL CROSS SECTION CP NEODYMIUM 146 TT

Fig. 6. Panial photoncutron cross sections n(y, n| and n(y, 2n) of ,4*Nd.

form N3S-418

(R EV. 7-1 4- 64) USC OMM-OC 2«010-P«4

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 219
PmGT OHUCLl-^ c=?osssccTion$

o-(Y.n) <r(x.2ri)

Fig. 9. Total photonuclear cross-section aT of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure.
REF. D. W. Madsen, L, S. Cardman, J. R. Legg, C. K. Bockelraan

Nucl. Phys. A168 . 97 (1971)

I EL EM. SYM. I Z

Nd 146 60

mfthOO REF. NO.

j 71 Ma 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

TYPE RANGE TYPE RANGE

E.E/ FMF 0 D 41 MAd-D DST

_ 0 = 0.45

•0 f1

t

0.*3JM«V 2* L«»«

I

C, • *0.80 U«V

U (•>*> (if •««* ” Si • I « Oi •! f • 8»l SIC 2 ) • 7030 '"•*

• 30.9 *.».«. » 3 . 9 * 1 *

Table 11 A comparison of this experiment's ifCELf) values with those of other experiments and theory

Nucleus State This Pulsed Heavy particle Theory

(MeV) work beam Coulomb excitation

2* states

l4, Nd 1.57 13.1 ± 1.7 25.0 ± 7.3*) 16.4 •)

19.1 ± 2.3*)

1 5.5 ± 7.8*)

16.3 •)

14, Nd 2.09 4.1 ± 1.1 ,4*Nd 0.45 30.9 ± 4.6 28.5 ± 0.4 ») 92.1 *) 28.1 ± 6. 6 *) v ,s0Nd 0.13 62.9 ±10.5 1 13.9±1.8 ’)

1 16.8 ±3.2 •) 112-4±5.1 *)

1 12-7± 4.2')

3” state

,4JNd 2.09 28.6 ± 5.0 52 ±21 J)

•) Ref. 3 *). *) Ref. 40).

c

) Ref. “). *) Ref. JT

). •) Ref. **). *) Ref. **).

•) Ref. 44

). ») Ref. 4S). *) Ref. *•). J ) Ref. *»).

""0. Hansen ec al.,Nucl. Phys. £2 (1963) 197.

W L. S. Kisslinger et al,,Rev. Mod. Phys. 25 ( 1-963) 353.

: S

J. 3jerregard et al., Nucl. Phys. 44 (1963) 280.

~'Z, A. Eurginyon, Thesis, Yale University (1967) unpub.

^D. Eccleshail et al., Nucl. Phys. 78 (1966) 481.

~ri 0. Nathan et al., Nucl. Phys. 21 (i960) 63 1.

Rho, Nucl. Phys. 65 (1965) 497.

~r'3 J. D. Kurfass et al., Phys. Rev. lol (1967) 1185.

*^T. W. Richter et al., 2. Phys. 21^ (1963) 202.

3irk et al., Phys. Rev. Li6 (1959) 730.

?;£. 16. Inelastic form factors for the 2

* level at 453 keV in 144Nd a* a

function of inelastic momentum transfer. Tho experimental points are

' the hr.viir.es of this experiment and the solid line is tho heat fit assuming 1 1 — -

- a uniform ground state charge distribution with X - 4^6 fm and creat- ing a pseudo delta function for pw'** in«Q. (17). .EAR DATA SHEET

u.s. oepartmentof COMMERCE

NATIONAL. BUREAU OF STANDARDS
0. V. Vasil' ev, V. A. Semenov, and S. F. Yad. Fiz. 13, 463 (1971)

Sov. J. Nucl. Phys. 13, 259 (1971)

METHOD

Semenko

60

71 Va 2 hmg

REACTION EXCITATION SOURCE OETECTORRESULT ANGLE ENERGY TYPE RANGE TYPE RANGE G ,XN ABX 7-24 C 7-24 3F3-I 4PI

(7. 6-23. 25) (7. 6-23. 25)

Table H. Parameters of giant dipole resonance

faoiopa

jO8o

>£

u7

>£

lT

^ A

5d* a

A

Bj

>£

Ud

>£

lT

1 A*

ji

1

i*. 11/ ujlal $

N«iWI 332 n.a 4,1 2.12 !.««» 'Soi« 335 14,1 4,rt 2,««8 0,06 Gd'" U7 12,0 3,o 0,003 250 15,0 3.2 1.29 1.00 0,00 1.87 1,25 0,28

•r.d*“ 161 11,9 2,4 o.r.ia 250 15,0 3,5 1,39 2,00 o.ho 2,27 1,26 0,29 Gd1 ** 130 11,9 2,6 0,733 243 15,2 3,6 1.37 2.11 0,94 1,85 1.27 0,31 Gd“* 165 11.7 2,5 0,602 240 >4.3 3,4 1.49 2,16 0,94 2,3 1.24 0.32 Eu“' a»5 t*,0 4.S 2.ini 0.92 Eu“* tss tt.» 2.3 0,642 237 15.1 3.4 1.34 1.90 0,86 2.34 1.27 0,31

9, mb

FIG. 1. Photoneutron cross sections and photoabsorption cross sec- tions of Nd14t

, Sm1 **. Eu ,5

‘, Eu'53

. Gd'”, Gd 154

, Gd'54 and Gd'“

Statistical and rms experimental errors are shown (the latter horizontal

bars at 9.42 MeV, 10.42 MeV etc.) At photon energies above the ( y, 2n)

threshold the photoabsorption cross section errors are not shown.

form NBS-418

(REV. 7-14.SA) use omm-oc 28010-pea PH0T0NUCLEAR DATA SHEET 222

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
REF. Z. Berant, J. Tenenbaum and R. Moreh

Nucl . Phys. A276, 221 (1977)

CLEM. SYM. A

Nd 146 60

METHOD REF. NO.

77 Be 7 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANG! TYPE RANGE G,G LFT 7 D 7 SCD-D DST

- 7=7.163 MeV

Table 2 The 7-line energies E, of the scattered radiation from l **' 1M Nd together with level energies £, and

angular distribution coefficients A

Isotope £,(±3keV) Intensity A £.(±3keV) r *,*)

'“Nd 6709 13±1 0.03 ±0.04 454 2 453.8 5475 3+1 1688 0. 1,2 1687 5383 5±t 0.03 ±0.1

3

1778 2 1777.3 4807 3±l 2349 0. 1.2 2350

4701 3±l 2460 0, 1.2 2462

4583 2±1 2578 0, 1,2 2575

3891 I ±1 3280 0. 1.2 3279

7163 100 0.46 ±0.09 7163 r- “5 Nd 7096 < 1 67 67.0 6107 < 3 1056 1052 5569 2±l 1594 1593.5 5408 < 1 1755 1760 7163 < 3 7163

l ~Nd 5820 < 1 695 696.49 6515 < 1 6515

The spins J

m are based either on the values of A or on the assumption that the resonance level is deexcited by dipole transitions.

*) Only those levels of refs. I0

) are listed which were also observed in the present work.

qT.W. Burrows, Nucl. Data 14, no. 4 413 (1975)

T.W. 3urrows, Nucl. Data 17, 203 (1975)

10

T.W. Burrows and R.L. Auble, Nucl. Data 16, 231 (1975)

o

Fig- 3. Decay scheme of the 7163 keV level of

t4*Nd showing level energies and relative intensities. The level spins are those obtained from

the results of the present work (table 2).

Table 4

Values of f. f0, and the energy separation 6 (between the incident 7-line and the resonance level)

Scatterer £, (keV) T (meV) r0 (meV) A (eV)

144Nd 7163 125 ±50 41 ±13 I3.7±0.6

154Sm 6465 105 ±50 25 ±13 3.6 ±2.0

?o«m NSS-41S

tnev. 7.1 4* 64) USCOMM44BSOC PHOTONUCLEAR DATA SHEET 223

U.S. DEPARTMENT OF COMMERCE

NATIONAL aURCAUOF STANOAROS
-
I

A=1 48

i Id A= 1 48

225

[Id

A=142

| ELEM. SYM. A 2 0. V. Vasilijev, G. N. ZaLesny, S Phys. Letters 3QB , 97 (1969)

METHOD

F. Semenko, V. A. Semenov

Nd 143 60

REF. NO.

69 Va 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

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

3l o3

Fig. 2. The photoneutron cross section aty, n) and the nhotoabsorption cross sections 0V ot for anc| i50Nd . The <Ttot are represented by dots. At the energies where <7tot and my. n) differ, the latter is re- presented by circles. Only statistical errors of <J. are plotted.

tot

FORM N8S-418

(REV. 7-14-64) U3COMM.OC 26010-064 PHOTONUCLEAR DATA SHEET 227

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. 0. V. Vasil'ev, G. N. Zalesnyi, S. F. Yad. Fiz. _10 , 460 (1969)

Sov. J. Nucl. Phys. _10, 263 (1970)

method

Semenko, and V. A. Semenov ELEM. SYM.

Nd 148 60

| 69 Va 3 egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.XN ABX 8-22 C 8-22 BF3-I 4PI

SEE 69VA2 333

[over]

form N8S-418

IR EV . 7-1 4-44) USC OMM-DC 24010-044 PHOTONUCLEAR DATA SHEET 228

U.S. (DEPARTMENT OF COMMERCE

NATIONAL BUREAU OR STANDARDS
Table I. Giant resonance parameters of Nd“*’

and SmiS0,1M’

1**

fmtMun

X4- »**" »— S*m

«-p BO 160.0 (00.0 204.0 M«V 11.25 11.33 11.00 iT.. M.v 2.0 2.4 3.0 «;*. lttV-4 0.730 1.319 0.962

4». » 270.0 420.0 220.0 *»». H.V M .30 14.63 15.25 *r,. m*v (i0 3.4 4.0 U«V-4 1.693 2.242 2.01 2.24 1.7 2.09

a*-

, m.v-6 2.(04 2.213 2.213 3.079 2.479 0.(4 2.1(0 2.160 2.163 2.203 2.222

?• 0.22 0.70 0.41 0.24 0.20 0.31

•«. -* (20 240

*».4 . m.v I3.S3 13.6 *r4

. M.V 5.0 5.3

229
REF.

P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. Veyssiere

Nucl. Fhys. A172 , 437 (1971)

ELEM. SVM.

Nd 148 60

METHOD REF. NO.

71 Ca 1 REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,N 4*4 ABX 8-20 D 8-20 MOD1

4 PI G,2N wo7 + ABX 8-20 D 8-20 MOD1

4PI

• gfli/ .

Table 2

Parameters of the one- or tuo-Lorentz line fits to the aT curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results 13

) are also shown

Ce 14I Nd 143Nd 144Nd 14S Nd ,4*Nd ,4,Nd ,50Nd tr

tr, (mb) 360 ±15 359 ±15 360 ±15 317 ±15 297 -:o 308 ±16 263 ±15 174 =20 225 ±15

-T, (MeV) 4.35 ±0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 =0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05 Et (MeV) 15.0 ± 0.10 1 4.95 ± 0.1 15 ± 0.1 15.05± 0.1 15 = 0.15 14.8 ± 0.1 14.7± 0.15 12.3 ± 0.15 12.00± 0.1

<r, (mb) 223 ±20 260 ±15

T, (MeV) 5.2 ± 0.15 5.0 ± 0.05 Ei (MeV) 16 = 0.15 1 5.45 ± 0.1

1.1 nr MeV b 2.5 ± 0.2 2.54± 0.2 2.6 ± 0.2 3.0= 0.3 2.9 ± 0.2 3.0 ± 0.2 2.7 ± 0.3

fcror

0.06 NZA~'

I.20± 0.10 1 .22 ± 0.10 1 .25 ± 0.10 1.4= 0.15 l.35± 0.10 1.4± 0.1 l.27± 0.15

13

R. Bergere, H. Beil , P. Carlos et A. Veyssiere, Nucl.. Phys. A133, 417 (1969).

Fig. 7. Panial photoneutron cross sections a(y, n) and a(y, 2n) of ,4 *Nd. (over)

form H3S-4I8

(R £ V . 7-14-64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 230

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
PHOTOnuCLEAR CROSS-SECTIOtlS

Fig. 9. Tola) photonuclear cross-section ar of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure.

231

ft)

A=150

^ «iD A=1 50

to

A=1 50

233

Ref- J.H. Carver, W. Turchinetz

Proc. Phys. Soc. 21, 69 (1959)

Elem. Sym. A z

Nd 150 60

33 MeV Synchrotron; radioactivity; Nal spectrometer; ionization

chamber

Ref. No.

59 Ca 3 EH

Reaction E or AE <7d E Jrr Notes

Nd150

(Y,n) Bremss, ~ 8-32 13.2 5.7 MeV

t r; 1 1 ; : 1 : : : 1

1 n

Figure 4. A, the ratio of activation curves lS0Nd(y,n)/18 lTa(y,n); B, activation curve

for linNd(y,n); C, derived cross section: 1 S0Nd(y,n).

form NBS-418

(8-1-S3) USCOMM-OC 18S36-P83 PHOTONUCLEAR DATA SHEET 235

U.S. pePARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
0. V. Vasili jev, G. N. Zalesny, S. F. Semenko, V. A.

Phys. Letters 3QB . 97 (1969)

METHOD

c.l. c.M. a t f Semenov

Nd 150 60

REF. NO.

69 Va 2 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

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

Fig. 2. The photbneutron cross section <j(y, n) and the photoabsorption cross sections 0i ot for and 1S0Nd . The <7tot are represented by dots. At the energies where <rtot and ofy, n) differ, the latter is re- presented by circles. Only statistical errors of <7. are plotted.

cot

form MBS-418

(R CV. 7.1 4* 441 USC OMM.OC 2401 0*P6 4 PHOTONUCLEAR DATA SHEET 236

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. 0. ELEM. SYM. V. Vasil' ev, G. N. Zalesnyi, S. F„ Seraenko, and V. A, Semenov

Yad. Fiz. _L0, 460 (1969)

Sov. J. Nucl, Phys. _10, 263 (1970)

METHOD

Nd 150 60

I 69 va 3 egf

REACTION RESULT EXCITATION energy

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G > XN ABX 8-22 C 8-22 BF3-I 4PI

SEE 69V A

2

a b

[over]

form NBS-418

M IR £V. 7-1 «-«4) USCOMM-OC 2SOIO-0S4 PH0T0NUCLEAR DATA SHEET 237

U.S. DEPARTMENT of commerce

NATIONAL BUREAU OF STANDARDS
Table I. Giant resonance parameter* of Ndi4*,uo and

finnxtab

Nacftnt

X4-* If4*** fa* Smm to«

ab

' 160.0 400.0 204.0 A-.. >UV 11.23 11.33 11.00 *r.. x«v 3.0 2.4 3.0

'

«;**. McV-b 0.730 1.319 0.962

s,, ab 270.0 420.0 220.0

-U*>. M«V 14.30 14.63 15.23 *r». m*v 5° 2.4 4.0

si", MiV-b 1.093 2.242 2.01 2.26 1.7 2.09

#“*, X*V-b 2.406 2.213 2.213 3.079 2.479 0.0C mm 2.140 2.160 2.182 2.203 2.222 ? 0.32 0..70 0.41 0.26 0.20 0.22

«<t ab 420 380

JU>4 . >UV 13.63 13.6 *r4

. »fav S.O 3.3

238
P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. Veyssiere

Nucl. Phys. A172, 437 (1971)

ELEM. SYM. A

Nd 150 60

METHOD REF. NO.

71 Ca 1 egf

REACTION result excitation

energy

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.N +*1 ABX 10-20 D 8-20 MOD- 1 4PT

G . 2N ABX 10-20 D 8-20 MOD- 1 4PT

Table 2 Parameters of the one- or two-Lorentz line fits to the <rT curves for neodymium isotopes: parameters for Ce and Er extracted from earlier results 1J

) are also shown

Ce ,41 Nd >«»Nd 144Nd 145 Nd 14*Nd ,4 *Nd 1,0Nd Er

<x, (mb) 360 ±15 359 ±15 360 ±15 317 ±15 297 ±20 308 ±16 263 =15 174 ±20 225 ±15 r, (MeV) 4.35 ±0.05 4.43 ± 0.20 4.5 ±0.2 5.3 ± 0.25 6.5 ±0.4 6 ± 0.3 7.2 ± 0.3 3.3 ± 0.1 2.9 ±0.05

£, (MeV) 15.0 ± 0.10 14.95 ± 0.1 15 ± 0.1 15.05± 0.1 15 ± 0.15 14.8 ± 0.1 14.7 ± 0.15 12.3 ± 0.15 12.00± 0.1 ax (mb) 223 ±20 260 ±15

A (MeV) 5.2 ± 0.15 5.0 ± 0.05 £, (MeV) 16 ± 0.15 1 5.45 ± 0.!

}."rr»T MeV • b 2.5 ± 0.2 2.54 ± 0.2 2.6 ± 0.2 3.0± 0.3 2.9 ± 0.2 3.0= 0.2 2.7 ± 0.3

J.TffT 0 06 \7A ~ • l.20± 0.10 1.22± 0.10 1.25± 0.10 1.4± 0.15 1.35 ± 0.10 1.4± 0.1 l.27± 0.15

^R. Bergere, H. Beil, P. Carlos et A. Veyssiere, Nucl. Phys. A133, 417 (1969).

2S0

200

150

100

so h

PARTIAL CROSS SECTION OF NEODYMIUM 150

1 (Jtmb) ,\ :

'“1

fit. n) . ftr.pnl r(T.2n) * '

i

1

H

1

f i 1 1

T “ r i V .

1

,T

ft ,tlt Ihhi 1

- it

t I .

I

1

1

i

1 r

^ . 1 . .

f

.. 1 . 1

1

t

_i... . i_

8 ’.0 12 It 16 18 20 22 E y (MeV)

Fig. S. Partial photoncutron cross sections <r(;>, n) and On) of ,50 Nd. (over)

FORM N3S-418

(REV. 7- I A- 64) USCOMM-OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 239

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
PHOTOriUCLtAR CROSS-SCCTIOflS

Fig. 9. Total photonuclear cross-section <rT of neodymium isotopes. The full line drawn through

the experimental points is merely meant to facilitate the identification of structure.

240
,er - D. W. Madsen, L. S. Cardman, J. R. Legg, C. K. Bockelman

Nucl. Phvs. A168 . 97 (1971)

ELEM. SYM.

Nd 150 60

REF. NO.

71 Ma 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

type range TYPE RANGE

E.E/ FMF 0 D 60 MAG-D DST

0 = 0.13

Table 11 A comparison of this experiment’s BfEZ.)) values with those of other experiments and theory

Nucleus State This Pulsed Heavy particle Theory

(MeV) work beam Coulomb excitation

2* states

1 41Nd 1.57 13.1 ± 1.7 25.0 ± 7.3 ) 16.4 4

) 19.1 ± 2.3*) 15.5± 7.8 •)

16.3 •)

,41 Nd 2.09 4.1 ± 1.1 '“Nd 0.45 30.9 ± 4.6 28.5 ± 0.4 ») 28.1 ± 6.6*)

92.1 a

)

150Nd 0.13 62.9 ±10.5 !13.9±1.8 ') 116.8±3.2 *) iii4±5.i *)

I12.7± 4.2')

3” state 141Nd 2.09 28. 6± 5.0 52 ±21 0

•) Ref. J »). *) Ref. 40

). ') Ref. 41

). 4

) Ref. ”). •) Ref. 4J

). 0 Ref. **).

») Ref. “). ») Ref. 4S

). ') Ref. 3t

). 0 Ref. ”). 330. Hansen et al.,Nucl. Phys. ^2 (1963) 197.

37

L. S. Kisslinger et al.,R.ev. Mod, Phys. Jjj (1963) 353.

3 ^J. Bjerregard et al., Nacl. Phys. 44 (1963) 280*

on~G. A. Burginyon, Thesis, Yale University (1967) unpub.

^D. Eccleshall et al., Nucl. Phys. 78 (i960 ) 431.

^0. Nathan et al., Nucl. Phys. 2_1 (i960) 631.

^M. Rho, Nucl. Phys. 6£ (1965 ) 497.

^3J. D. Kurfess et al., Phys. Rev. lol (1967) 1185.

^F. W. Richter et ai., Z. Phys. 213 (1968) 202.

^M. Birk et al*, Phys. Rev. 116 (1959) 730.

Fi*. 17. Inelastic form factors for the 132 keV, 2

*

level in “*Nd as a

. function of inelastic momentum transfer. The experimental points are the results of this experiment while the solid line traces oat the beat

fit provided by parameter* shown. .EAR DATA SHEET 241

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. A. Schwierczinski, R. Frey, E. Spamer, H. Theissen,

and Th. Walcher

Phys. Lett. 55B , 171 (1975)

EL EM. SYM.

Nd 150 60

METHOD REF. NO.

75 Sc 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYPE RANGE TYPE RANGE

E,E/ NOX 5- 28 D 50, 64 MAG-D 93

-

E.E/ SPECTRUM (E2)

Inelastic electron scattering has been used to study the isoscalar E2 giant resonances in 142 Nd and 1 s0 Nd, which

were found at excitation energies of 1 2.0 and 1 1.2 Me V with total widths of 2.8 and 5.0 Me V . respectively. The energy shift and the larger width in 130 Nd indicate a splitting due to the deformation of ls0 Nd.

Fig. 1 . Spectrum of inclasticaily scattered electrons after subtraction of radiation tail and background, a) 14J Nd,

b) 1S0 Nd (open circles). Solid line: El cross section. Full cir- cles: El cross section subtracted. The total number of counts/nC in the region of the giant resonances is about 100.

porm M3S-418

'R6V. 7-14. 64

1

USC QMM-N BS-O C

U.S. DEPARTMENT OF COMMERCE

NATIONAL. 9UREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 242
- lU *-r .

R {p. C. Creswell , A. Hirsch, W. Bertozzi , J. Heisenberg, S. Kowalski,

C.P. Sargent, W. Turchinetz & A. Dieperink

Phys. Rev. 08 , 2432 (1978)

EL EM. SYM. A

Nd 150 60

METHOD REF. NO. 78 Cr 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANCI TYPE RANSE E,E/ ABX 850*931 D 1*2 MAG-D UKN

-

Recent electron scattering results on the 0.850 MeV level of 150Nd, when analyzed in terms of the *£ KEV J Q .8-2. FM-1

interacting boson model, are inconsistent with the interpretation of this level as a pure J

T

(.K) = 2+

(0) state. 2

Very recent (n.n'y) work has shown this level to be a 1*. 2* doublet. Assuming this level to be the band*

head of a “JC* = 0

- " octupole band, a simple model is used to predict electron scattering form factors for the 0.850 MeV state and a 3” octupole level observed at 0.931 MeV. Comparison is made between these predicted form factors and recent electron scattering data.

Fig. 2. Electron scattering form factor for the

3* (0.931 MeV) state in 1S5Nd. The curve represents a calculation in which the 3' excitation is modeled as a small amplitude collective surface oscillation.

Fig. 3. Electron scattering form factor for the 0.850 MeV state in

lsaN'd. The solid curve results from a calculation in which the state is represented as a J'(K)

- 1 (0) octupole surface oscillation belonging to the same

band as the 3" (0.931 MeV). The dashed curve Is due to a calculation in which the state Is represented as a

(if) - 2* (0) surface oscillation and the dot-dash curve

represents the IBA 2* prediction.

form M3S.41I

(RtV. 7.1 4.44) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 243

u.s. department of commerce

NATIONAL BUREAU OF 3TANOAROS

Sm

SAMARIUM

Z=62

Samarium's discovery is generally credited to Boisbaudran

who in 1879 isolated "samaria" from "didymia", a mixture of

rare earths from which cerium and lanthanum had been,

extracted. It was identified by its spectrum and named in

honor of a Russian engineer. Col. M. Samarski.

Sr,

245

co
-
C.U -M. jfM. z E.G. Fuller, B. Petree, M.S. Weiss

Phys. Rev. 112, 55^ (1958)

Be catron; ion chamber

Sm 62

REF. NO.

58 Fu 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE HANOI TYPE RANGE

G , XN ARX 7-^0 c 7-ko BF3-X U-VI

CF DANdS THEORY

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

resonance curves to obtain these parameters. Tabu L Target properties and results.

element Form used Weight

grams barns

SrdE> HZ/A

Mev-I> •T'* Mev

Sn Sn 4.81 0.30 0.064 5.0

I i 8.55 0.56 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 SmjOt 2.90 0.26 0.073 8 6 Tb Tb,Or 3.04 0.59 0.087 8 7 Ho HojO, 1.87 0.41 0.079 7.5 Er EriO, 5.41 0.50 0.100 S.3 Yb Vb*Oi 5.57 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

«o*n 'ft ^fction tm“8i <ar multiple neutron'emuno* nue<1 »'th resonance lines to determine theae value*. neuW^f^e ^Tthttd.'00 "0" mU°n* COrrec“d for multit>Ia

no. S. Relative photoneutron production cross sections for tin, iodine, samarium, holmium, erbium, and lead. The ooints and smooth curves represent the integral neutron-production cross section defined by y,*<r r.(£)d£, where <r r»(E)-*(y,n)-rMy,2n)+'(y.t*' T. Jjv ’ ' ” . are normalized to give approximately the same total neutron yield at 40 Mev. The errors indicated were o .tained by propagating the statistical uncertainties, (\/»), in the original activation curve data through the integral cross section ra* mSti^rit^

t^^^g^^)n

rV^hoid CrCnCCS °* * ntC^Ta* cross section curves. Dashed histograms show result of correcting for neutron

MBS-418

V . T. I 4.441 »«M-nr ZMoto. n«4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUWEAUOF S' V ^33

PH070NUCLHAR DATA SK2ET 247
F. I. Havlicek

Nuovo Cimento 969-73 (1959)

ELEM. SYM.

Sra 62

METHOD

Betatron

REF. NO.

59 Ha 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, A SPC THR - 30 C 30 EMU-D 1-5 DST

form NBS-418

(REV. 7-14-64) USC OMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 248

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
i. ±*2.-.

.

Ref. aw. Jifi, 701 (i960)

Elem. Sym.

Sm 62

Method 07

Y**

*" OfMfl) lal. 60 Re 1 JHH

Reaction E or AE <7d E J w Notes

<Y»Y) -7 <7> C*f •

• <o.6i mb

U.S. DEPARTMENT OP COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(9-1-S3) U3COMM-OC tS83a-PS3 PHOTONUCLEAR DATA SHEET 249
Ref. G. Ben-David (Davis); B. Huebschmann

Phys. Letters 87 ( 1962 )

Method (11,7) reaction; Nal(TiJ)

Reaction

S«nCY,7)

E or AH

5.^ - 8.997 8.997

(7d E J *

Elem. Sym.

Sm

Ref. No. 62 Be 2

Notes

1 mb

y source

Ni

Detector at 135 •

62

BG

form NBS>418

l8-1-«3) USCOMM-OC M9Se-P93

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 250
REF. B. Arad (Huebschmann) , G. Ben-David (Davis) I. Pelah,

Y. Schlesinger

Phys. Rev. 133 . B684-700 (1964)

ELEM. SYM.

Sra 62

METHOD

Reaccor, (n,y) reactions source

REF. NO.64 Ar l NVB

REACTION RESULT EXCITATION ENERGY

SOURCE detector

angle TYPE RANGE TYPE RANGE

G ,G ABX 9 D 9 NAI-D - 135

(8.997) (8.997)

Table II. Capture gamma-ray sources and their properties.*

Source Chemical

composition Mass

kg Principal y rays (in MeV)

A1

ClCo

CrCu

FeHg

Mo

Ni

TiV

Y

Metal

polwinvl Chloride Co0

Metallic powder

Metal

Metallic powder

Hg:(N0,).-2H,0

MnO,

Metal TiOi

VjO.

YjO»

1.640 0.380

0.230

0.480

1.860 0.440

0.310

0.240 0.900

0.210

0.120

0.200

7.73 S 55, 7.78, 7.41, 6.96, 6.64, 6.12, 5.72

7 49 7.20, 6.98, 6.87, 6.68, 6.48, 5.97, 5.67 9 72, 8.S8, 8.49, 7.93, 7.09, 6.65, 5.60

7.91, 7.63 , 7.29, 7.14, 7.00, 6.63

9.30, 7.64, 7.28, 6.03

6.44, 6.31, 5.99, 5.67, 5.44

7 d6 7.15, 7.04, 6.96, 6.79, 6.10, 5.76

9.00, S.50, 8.10, 7.83, 7.58, 6.84, 6.64

6.75, 6.56, 6.42

7 30, 7.16, 6.86, 6.51, 6.46, 5.87, 0.73

6.07, 5.63

*

rot more detailed information, additional lines, intensities, etc., see Ref. 6.

Table III. Effective cross sections.

7 source Energy (MeV) Element Protons

Scatterer Neutrons w(mb) Notes Hg 5.44 Hg 80 116, 118, 119, 120, 121, 122, 124 123

Cl 6.12 pr Ml 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, 33, 34, 85, 86, 88 22 A1 6.98 Pb“ 82 126 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» SJ i*a 23 Mn 7.261 Pb®* 82 126 25 a

Fe 7.285 Pb»* 82 126 4100 a V 7.305 Pb** 82 126 12.5 Hg 7.32 Pb 82 124, 125, 126 5500 c Fe 7.639 Ni 28 30, 32, 34, 36 10.5 d Fe 7.639 pr»i 59 82 10 d Cr 8.499 Cu 29 34, 36 24.4 Cr 8.881 Pr‘« 59 82 9.3 Ni 8.997 Sm 62 82, 35-88, 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 el at. (Ref. 6).

a Because of the low counting rate, thick scat terers were used, which will introduce a systematic error in estimating (uyj for resonances having a high

nuclear cross section.

• The cross section was evaluated assuming the gamma intensity to be 0.02 photons per 100 captured neutrons (see text).

4 Reference 6 gives the 7.639 line of iron capture gamma rays as a single line. However, a recent paper by Fiebiger. Kand, and Segel CPhys. 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 is no possibility of deciding which line is responsible for the scattering.

form NBS-41S IMV. 7*14.64) U3COMM.OC 26010.P64 PH0T0NUCLEAR DATA SHEET 251

U.S. DEPARTMENT OF COMMERCE

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

Nucl. Phys. A133 , 417 (1969)

£L EM. srM.

Sm 62

METHOD REF. NO. 69 Be 6 egf

EXCITATION ENERGY

SOURCE DETECTOR

reaction RESULT TYPE range TYPE RANGE ANGLE

G,N ABX 7-21 D 7-27 MODI

4PI

G,2N ABX 13-25 D 7-27 MODI

4PI

G,3N H8c ABX 23-27 D 7-27 MODI

4PI

x = fraction of total cross section resulting in a direct neutron

n = fraction of neutrons emitted by direct effect at an energy where all the evaporation

d neutrons go to (yj2n) cross section

nd = x/(2-x)

Tableau 3 Moments quadrupolaires intrinsdques

Cible % isotopes alb ex Pi ex /US(E2 )] Qo Q'o

ex (b)

53 I 100 %

,27

I 0.85 0.172 -2.3 ±0.4

5 .Ce 88.5 %

t40Ce 0.104

11.1 %

142Ce 0.118 »;Sm 15 %

J4TSm

11.2% 14, Sm ] 13.8% 149Sm 1 - 0.219

1

f 4.5 ±0.4

0.158

7.5% 130Sm | 0.190

j 3.53 26.6% 13J Sm i

1 . 0.304

) 5.93 22.5% ,34Sm ’ 0.351 ' 6.58 ssEr 33.4% 1MEr i

j 0.341 1 7.60 22.9% ls7Er

27.1 % “*Er

1.314 0.288 0.339

6.96 ±0.4

7.80

7.60 14.9% ,70 Er J

1 0.329 J 7.45 7>LU 97.4% 173 Lu 1.282 0.262 6.95 ±0.3 7.20

Tableau 5 Valeurs de la temperature nucieaire et du paramitrc a dc dcnsite dcs nivcaux

X "4 & (MeV) E'j-En (MeV) a (McV-‘) a (MeV" ') a" (McV-‘)

I 0.05 ±0.005 0.03 1.0.03 1.30 ±0.20 10 6 _2.5 10 ; 3 1 0 2

,40Cc 0.21 -0.05 0.1 2 ±0.03 1.05 ±0.20 10 9-3.5 7-3

‘«Ce 0.8 ±0.20 6 9±4 8—3

Sm 0.18 ±0.04 0. 10±0.03

Er 0.20±0.05 0.11 ±0.03 :

n

-1! t

Lu 0.26 ±0.06 0.15 ±0.03 0.85 ±0.1 9 12.5±2.5 15—3

form NBS-418

IREV. 7.14.441 U4COMM.QC 240 1 0* P44 PHOTOHUCLEAR DATA SHEET 252

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Tableau 4 Regies de sommc

Noyau ciblc (ilemerus naturcis) "o (MeV b)

”'o (MeV • b) NZ

0.06 —

A

v0 A

0.06 NZ

o' o-4 0.06 NZ

<7-1 (mb)

<1-y.A~* "-i (mb • MeV" ‘)

2.02 L0.I4 2.30±0.I2 1.85 1.09 ±0.07 1.24 ±0.07 129±0.10 0.20 x0.02 8.6±0.6 2.7 0.2 5«CC 2.13 0.15 2.53±0.!3 2.04 1.05 ±0.07 1.24 ±0.07 140±0.12 0.19 ±0.02 9.5 ±0.6 2.5 0.2

ftjSrn 2.48 .0. 1

7

2.92±0.14 2.18 1.14±0.07 l.34±0.07 1 67 ±0. 1

4

0.21 ±0.02 11.8 ±0.8 2.75x0.2

oxEr 2.70 0.19 3.04±0.I6 2.42 1.1 2 ±0.07 1.26 ±0.07 1 86 ±0. 1

5

0.20 x0.02 1 3.6 ± 1 2.7 ±0.2

•ji Lu 2.65 0.18 2.96±0.16 2.53 1.05 ±0.07 1.1 7 ±0.07 182 ±0.15 0.1 85 ±0.02 1 2.9 ± 1 2.35-10.2

valeur moyonnc

pour ces 5 corps 1.09 ±0.07 1.25 ±0.07 0.20 ±0.02 2.6 —0.2

K rmb

k
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

ELEM. SYM.

Sm 62

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 TEK-I 4PI

Table 1 Measured values of <x, at £ = 1000 MeV and deduced values of <rk assumed constant from £0 to 1000 MeV

999 = 1 GEV

Element Z*/A

(mb)

Eo (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+03 230 18 +0.3 An 31.68 10±0.15 240 1.4 +0.2

pi 31.18 1.1 ±0.08 255 18 ±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 (33 ±0.3) x 10-' 290 (2.8 +0.3) x 10-' Ta 29.45 (3.3 ±0.3) x 10“ 1 300 (2.7 ±0.3) x 10-' Hf 29.04 (1.7 ±0.2) x 10" 1 310 11.4 + 0.2) x 10-' 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 27.21 (3.6 ±0.4) x 10- 2 355 (3.5 +0.4) x 10- 2 Dy 26.80 (16±0.3)xl0- 2 360 (23+0.3) x 10 -2 Tb 26.58 (23 ±0.3) x 10* 2 370 (23 + 0.3) x tO -2 Gd 26.04 ( 1.6 ±0.2) x 10" 2 380 (1.7 + 0.2) x 10* 2 Sm 2536 (1.3±0_2)x 10" 2 390 ( 1.4 +0.2) x 10’ 2 Nd 24.96 (9.2 ± 0.9) x 10

1 405 (1 +0.1) xlO* 2 Ce 24.00 (8 ± 0.9) x 10" 3 420 (9 +1 )x 10" 3 U 23.39 (8.4 ±0.9) x 10- 3 430 11 +0.1) x 10" 3 Sb 21.36 (1.2 ±0.2) x 10* 2 460 ( 13 + 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) 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 lo

- ' Cu 13.44 (14 ±0.5) x 10" 1 515 (3.6 + 0.8) x 10" 1 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 IQ

-

1

12.

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).

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.

squarn^he^tlTmm” f“*»‘ fUnC, ‘ 0n S ^ ^

Experimen,al P°inU: so,id circles represent our data;

:

roTM " . ,; k°P*“ C1I

C|C5- the data from ref. ’); and crosses, the data from (p.f) experi-

). The straight line is the best fit calculated from our data for Zz/A > 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

). form MSS-411

<R Ev . 7-1 4.641 USC OMM-N 3 5-0 C

z/*

PHOTONUCLEAR DATA SHEET 254

U.S. DEPARTMENT OF COMMERCE

NATIONAL P UREAU OF STANOARDS
- —— . 

-------

:—-•— _. i

A=144

M„T. DeSouta Sar.tos, J. Goldemberg, R.R. Pieroni, E. Silva,

0. A. borellc, S.S. Villaca, J.L. Lopes

Int. Conf. Peaceful Uses of Atomic Energy II (UN, NY), 169 (1955)

METHOD

3etacron; neutron yield; radioactivity; r-chamber

EL, EM. SYM.

Sm 144 ! 62

REP. NO.

55 De 1 EGF

REACTION RESULT EXCITATION ENEROY

SOURCE DETECTOR

ANCLE

TYP* PIANO* TYPS RANGE

G,N ABX 9-23 c 9-23 ACT-I 4pi

PC AM K3S-41S

(REV. 7-'. A. *4) UICOMM.OC 2«010>*««

UJ. DEPARTMENT OP COMMSRl

NATIONAL BUREAU OP IT AND* R:- PHOTONUCLEAR 3A?A SKS5T 257
Ref. E. Silva, J. Goldemberg

Nuovo Cimento 13 (1956)

Elem. Sym.

Sm lMtRef. No. 56 Si 1

62

Method Betatron; radioactivity

EGF

Reaction E or AE <7d E J * Notes

o

l

2^/ \ Sm (7,n) 22 17.25 6.8

22

r =0.91 MeV-b

8.7

E , =9*8 MeV; ct = 135 mb.

ttl

* Some question as to isotope

form NBS-418

(8-i-ea) U3COMM-OC 18B56-P83 PHOTOHUCLEAR DATA SHEET 258

U.S. DEPARTMENT OF COMMERCE

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

Proc. Phys. Soc. J2., 69 (1959)

Elem. Sytn.

Sm ll+4 62

Ref. No. 59 Ca 3

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

EH

Reaction E or A E crd E J w Notes

Sm^CY^n) Bremss.

10-32 15.5 4.0 MeV 2.5±0.4 MeV-b

Figure 9. A, the ratio of activation curves U4Sm(y,n)/ l8lTa(y,n) ; B, activation curve

for 144 Sm(y,n); C, denveti cross section: l “Sm(y,n).

Table 2

Activity 7\ (min) (F0 (Mev) K//3 + K-capture

Total capture W*

nupr 3-4 3-25 0-63 0-89 0-89

ulNd 150 1-80 48 0-89 0-90 '“Sm 8-5 3-47 0-60 0-89 091

form NBS-418

(0-1*<53) U3C OMM* O C 1 8586*Pfl3 PHOTONUCLEAR DATA SHEET 259

U.S. DEPARTMENT OF COMMERCE

NATIONAL 9UREAU OF STANDARDS
REF. ELEM. SYM. A

G. Di Caporiacco, M. Mando, and F. Ferrero

Nuovo Cimento _1J, 522 (1959) Sm 144 62

METHOD REF. NO. Betatron; ion chamber 59 Di 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.N RLY 11-30 C 22,30 ACT1

4PI

REL T0 CU63 (G.N )

Yield ratios:

144 Sm(y.n)

l4l Pr(y,n)

1.088 —MXjS) = 3.79

33 Cu(y,n)

form NBS-418

(REV. 7-14-S4) U5C ©MM»OC 26010-P44 PHOTONUCLEAR DATA SHEET 260

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Rer< G. Ben-David, B. Arad. J. Balderman, and Y. Schlesinger

Phys. Rev. 146, B852 (1966)

EL EM. SYM.

Sm 144 62

METHOD REF. HO.

Nuclear Resonance Scattering using N,G reactions. 66 Be 3 JDM

RESULT EXCITATION SOURCE DETECTOR

REACTION ENERGY TYPE RANGE TYPE range

angle

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.

n*« MBS 4 18

r . r i

Scatterer Energy G»mm>

(MeV) source

t (mb) Energy

Scatterer (MeV) Gamma

source

< (mb) Sm 1 ** 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 Prm 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 8.119 Ni 13 Mo 6.44 Hg 25s Se 7.817 NI 50 La 6.413 Ti 72 Sc 7.76 K 90 Mo 6.413 Ti - 10 Sb 7.67 V . . .b T1 6.413 Ti 25 Cd 7.64 Fe 40« w ^6.3 Ti . . .b Ni

Pr'u

7.64 Fe T Sb 6.31 Hg

7.64 Fe 12* Ti 6.31 2« T1 7.64 Fe 370* Sn 6.27 75 La 7.634 Cu 7 Pb*** 6.15 Gd Mo 7.634 Cu ii Te 3.8 Ni . . ./ Bi* 7.634 Cu 4 La 6.12 Cl 35 Te 7.528 NI 66< pr ui 6.12 Cl 110

Bi«» 7.416 Se 100 Pt 5.99 Hg 40*>e Bi** 7.300 As 80» TI 5.99 Hg

Pb«* 7.283 Fe 4100 Pb"* 5.9 Sr~ . . .b Cl 7.285 Fe 34 Ce 5.646 Co 17 pf iu 7.185 Se 80 3im 5.646 Co 55 T1 7.16 Cu 120 Pb»* 5.53 70 La 7.15 Mn 50 Hg 3.44 Hg 75s Bi** 7.149 Ti 2000 Hg 4.903 Co 385

•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. rays

I on

> Te

>*bly “ iod'p*ndent U»* complex spectrum at N1 y

• Rough estimate.

1 May be inelastic component from 7.32* level In Te.

• The relative line intensities in this case are due to Groshev and

co ’Workers*

J No line i* known for the source at this energy.

i Difficult to resolve among the many source ^present at this < 261 PHQTONUCLEAR DATA SHLs

.
Shoda, M. Sugawara, T. Saito & H. Miyase

PICNS-69 Proceedings of the Conference on Nuclear Isospin.

Asilomar-Pacific Grove, California 1969 (Academic Press,

New York & London 1969) p. 137.

EL EM. SVM.

Sm 144 62

METHOD REF. NO.

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE range E,P SPC 11-20 D 20 MAG-D UKN

UKN=UKNOWN

/

V

‘ \l

I

1MLa

E, = 30MeV

•v*.

6 8 10 12 14 16

* ’•*C*

* ’ £• = 22MeV

- '* ’* t t•V" 4 V

• w

6 8 10 12 14 15

' i i ->

i,. Sr.****. c p

!.

‘ „

E*

‘

i20 MeV

X*V

4 6 8 10 12 14 16

Nt **Sm

, E- =20MeV

••V•X**, ...M ^

Table 2. The radiative widths of the main IAS. The results are compared with the

single particle strength in W. u.

.

Nucleus E

P (MeV)

E (a) x —

(MeV)

r /r

Po

r

2 (eV) * 2(T+l)r

r (W.u.

)

o<u

io 1

H-T 10.3 18 .

3

1 (b) 50 0.1

- 12.8 20.8 1 (b) 90 0.1

l4lPr 9-7 15.1 12/60 (c) 4o 0.2

"a. 10.6 16.

6

1 (b) 20 0.05

(a) Ground state is assumed for the residual state.

(b) As sumption.

(£) P. VonBrentano et al. (jj).

4 6 8 10 12 14 16 E ; (M#V)

Pig. 1. Energy distribution* of photoprotons.

Vertical broken lines and solid lines

indicate the position of pQ corresponding to the ground IAS and electric

dipole IAS <2). ‘A SHEET 26?

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
„ EF K. Shoda, T. Saico, M» Sugawara, H. Miyase, S. Olkawa, A. Suzuki

Phys. Rev. C4, 1842 (1971)

ELEM. SYM.

Sm 144 62

METHOD REF. NO.

71 Sh 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E,P AfiX 15-22 D 22 MAG-D 90

The energy distributions of protons from the reaction on .V=82 nuclei with even Z

have been measured. The cross sections of the (Y.fio^PO reaction have been estimated. Two

prominent iso baric analogs have been found in each nucleus. The results were used for the systematic discussion of the odd-odd parent nuclei lMCs, ua La, l42 Pr, arvi 144 Pm. The 1"

states are estimated at 600 and -2500 kcV for 13*Cs, 500 and 3000 keV for U0 La, 1100 and

27C0 keV for 142 Pr, and 1400 and 4300 keV for l44 Pm. The parameters of these states are dis- cussed in terms of a quasiproton and single-neutron model.

ISOBARIC ANALOGS

a*

)

..01

asi

z o 3 3*

u. 2

1

138.BoEe *23.0 MeV

1 t'—| — 1 '1 —

; * l40Ce

* * > » , 'j

E*’23.0

V, •»

Md

t Ee*22.5 MeV

•

Hr.Sm

Ee-21.5 MfV

4 o 'S • v i2 14 16 PROTON ENERGY (MeV)

FTG. 1. Energy distributions of protons emitted from

the It.e’p) reaction at 0»9O*.

3

2 ? 1

if* 3

£ 0 o~ Q ca

ou 4

14

3a

I

It .wA^V.k' M Ait *A,

,n "°Ce A

f\ Nd

2

f

* » "V .1 u

tf rtif %

y V

T rft

l! A.,

r tS'L yj \

Sm

16 13 20 E„ (MeV)

22

FIG. 2. The photoproton cross sections for p 0 + at

0 = 90* in the vicinity of the isooaric analog resonances. The curves for the broad resonances were obtained from

the Stting of the interference formula.

FORM NBS-418 IMV. 7-I4.UI USC OMM*OC 26010- PS

4

PHOTONUCLEAR DATA SHEET 263

U.s. DEPARTMENT OF COMMERCE

NATIONAL. 3UREAUOF STANDARDS
B. Arad, G. Ben-David, Y. Schlesinger, M. Phys. Rev. C6, 670 (1972)

METHOD

Hass

EL EM. SVM.

Sm 144 62

REF. NO. 72 Ar 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE G,G LFT 9 D 9 SCD-D 135

No new daca; re-evaluation of old data SEE 66BE3, 9 = 8.998

gives the following:

r = . 27±. 08 eV

r = .063 ± .013 eV

oD = 110 eV

The 8.998-MeV resonance level excited by the fy, y') reaction, which was previously assigned to 154Sm, la shown to belong to ,44 an. Tho level scheme of ,44 Sm la given and tbs reevaluated level parameters of the 8.998-MeV resonance are presented.

FORM N3S-418

!R E V. 7*1 4. 64

)

U3C3UM.OC 29010-P64 PHOTONUCLEAR DATA SHEET 264

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS
REF. R. Bergere, H. 3eil, P. Carlos, A. Lepretre, A. Vey3s lere

PICNS-73, Vol.I, p. 525 Asilomar

EL EM. SVM. A

Skn 144 62

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

TYPE RANGE ANGLE TYPE range a+SN ABX 10- 21 D 10- 21 BF3-I 4 PI

rig. 19 Total photoneutron cross section

o(y,n)+ a(y,2n) of Sm isotopes. The

solid lines show the best I Torentz

line fit ( 144 Sm 148 Sm 150 Sm) or

2 Lorentz lines fit ( 152 Sm and 154 Sm).

Table III

1

E, (MeV) T, (MeV) o, (mb)

l4l,

Sin —

15 .30±0.

1

4.37*0.15 384*20

l48 Sa 14.82*0.1 5.10*0.20 340+12

150 Sm 14.60*0.1 6 . 00±0 .20 3 1 2±20

PORM NSS-418

(R E V . 7-1 4-«4) U3C OMM-N BS-OC PHOTONUCLEAR DATA SHEET 265

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
H. Szichman

Z. Physik 259, 217 (1973)

ELEM. SVM.

Sm 144 62

METHOO REF. NO. 73 Sz 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LIT 9 D 9 SCD-D dst

9 = 3.995

Table 1. Reduced partial radiation widths of resonance levels in 66Zn, 1,MSrn and 120Sn

Nucleus Energy of

transition (keV)

Energy of

final state

Relative

intensity rjr0

(in percent)

Reduced widths (eV • meV-4 x 103

) Most likely characters Derived spin and parity values Jx £(£1) £(M1)

66Zn 7693 0 100 +1 6 ± 1 105+ 21 £1 0+

6634 1039.2 42 +1 4 + 1 68+ 14 £1 2+

5819 1874 <2 <0.3 <5 £1 or Ml 0, 1,2

5321 2372 <3 <0.6 <9 £1 or Ml 0, 1, 2 4930 2763 <2 <0.5 <8 £1 or Ml 0, 1,2 4755 2938.1 24+2 7 ± 2 106+ 23 El 0+

4587 3105.8 8 +1 2.4+ 0.6 39+ 9 El or Ml 0, 1, 2 4480 3212.6 21 +2 7+2 111+ 25 El 0+

4452 3240.6 7 +2 2.3+ 0.8 38+ 13 El or Ml 0, 1, 2

4361 3331.7 13+2 5 ± 1 75+ 19 El 0,2+

4263 3430.0 25 ±3 9+2 154+ 36 El 0, 2+

4187 3506.3 8 +2 3 ± 1 52+ 17 El or Ml 0, 1,2

144Sm 8995 0 100 +1 15+3 412+ 82 El 0+

7333 1662.0 33 +1 9 ± 2 251 ± 50 El 2+

6828 2167 3 ±1 10+4 28+ 11 El or Ml 0, 1,2

6568 2426.5 21 +1 8+2 222 ± 44 £1 2+

6514 2480.7 46 +1 18+4 499+100 £1 0+

6191 2804.1 12 ±1 6 + 1 164+ 33 £1 2+

120Sn 7693 0 100 +1.0 38 +11 932 + 266 £1 0+

6522 1171.4 7.3 +0.5 5 ± 1 112+ 32 £1 2+

5520 2172.9 1.4 + 0.3 1.4+ 0.4 35+ 10 £1 or Ml 0, 1, 2 5337 2356.0 12.3 + 0.8 14+4 343+ 98 £1 2+

foam N3S-418

(REV. 7-1 4.64) USC OMM-O C 26010-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 266
& REF.

?. Carlos, H. Beil, R. Bergere, A. Lapretre, A. De Miniac, and

A. Veyssiere

Nucl. Phys. A225, 171 (1974)

EL EM. SYM.

Sm 144 62

METHOD REF. NO. 74 Ca 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE

G,N * ABX 10- 21 D 10- 21 BF3-I 4PI

G,2N ** ABX 18- 21 D 18- 21 BF3-I 4PI

1 1

‘ 1 1

1

|

1

i 1 »

1 T T '.mb)

|i- .»

T (mb)

300

200

100

200

ICO

r

' Vi'r*

V NVvV

• / • • •

* \

V • ;

r. v ’*•

J

»»* i. 41 0 »

* \

y i 4 4A " 4* _ .r \ -*i.

r

i • *

•* 154

S m

L.V

t* 152

. f

* 4* t

I

• * V\-”

f. Sm

1

* *.

150Sm

.

J L

148,Sm

144,

_i L Sm

J L_ 10 12 14 16 18 20 22

E

t (MeV)

Fig. 7. Total photoneutron cross sections of the doubly even samarium isotopes. Best single Lorentz line fits are shown for 144 Sm, 14 *Sm and 150Sm. For 13J Sm and l5 *Sm the best two

Lorentz line fits are presented. Corresponding Lorentz line parameters are given in table 2. A 144 Sm

if TtY.n)

V. Y,2n!

It

; *

I

f- T i*»*4

12 14 16 20

E

y tMeVl

** 679

(over)

Fig. 2. Partial photoneutron cross sections [a(y, n)-r<r0', np)] and o(y, 2n) of I 4*Sm. sj 257

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 2 Lorentz line parameters El (MeV) <Ji (mb) A (McV) E2 (MeV) a2 (mb) A (Ml144Sm* 15.3 ±0.1 384±20 4.37 ±0.15

148 Sm* 14.8 ±0.1 339 ± 1

2

5.1 ±0.2

I48 Sm‘* 14.1 335 4

130 Sm* 14.6 ±0.1 312±20 6.0 ±0.2

150Sm** 13.6 360 5.5 152 Sra* 12.45 ±0.10 1 83 ±10 3.2 ±0.15 1 5.85 ±0. 10 226 — 10 5.1 li2 Sm** 11.55 400 2.4 14.65 420 3.4 l34Sm* 12.35±0.10 192± 10 3.35 ±0. 1

5

16.1 ±0.1 204± 10 5.25±C.

; 34sm»* 11 204 3 15.25 320 4

* Corresponding to best fits shown in fig. 7. ** Values taken from Vassilijev 23 - 24

) for comparison.

Table 3 Different integrated cross sections as defined in the text

144Sm u,Sm l30 Sm 132 Sm ti4

St:

A. (MeV) 21 20 20 20 21 a0 (MeV • b) 2 ±0.14 1.94±0.1 l ±0.14 o -H d

ri 2.07-

a-a (MeV b) 2.63 2.71 2.94 2.75 2.69 a’q A

0.06 NZ

1.24 1.25 1.35 1.24 1.2

<r_ i (mb) 131 ±15 134 ±10 141 ±15 144 ±10 145

<r_ 3 (mb - MeV* 1 ) 8.7±0.8 9.5 ±0.7 10.3 ±0.9 10.6 ±0.7 10. -

VaSi^*J ev et *1. » Sov. J.Nucl.Phys. JJ), 263 (1970)

0. Vaailijev et al. , Sov.J. Nucl.Phys. 13 , 463 (1971)

268
F. R. Metzger

Phys. Rev. C14 , 543 (1976)

EL EM. SYM.

Sm 144 62

METHOD REF. NO. 76 Me 6 rung

REACTION RESULT EXCITATION ENERGY

SOUPCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

$ G,G LFT 3 c 1-4 SCD-D DST

(3.225)

N - N POLARIMETER SXPER

-!i = (+3 . 6+2.7) %

.

N + N —

II JTABLE I. Properties of the low-lving 1" levels in the

stable even Sm isotopes.

Isotope r„ (meV) B(E l)lp. JV

U4Sm 3.225 220 ±30 3.5±0.5 82

U8Sm 1.465 3.1±0.4 0.5±0.1 86

U0Sm 1.166 5.4±0.5 1.8 ±0.2 38

u,Stn 0.963 7.3±0.6 4.2±0.4 90

IM Sm 0.921 7.4±1.0 4.8 ±0.7 92

form M3S-418

<R EV. 7-1 4.84) use omm-n a s-o c

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOARDS PHOTOHUCLEAR DATA SHEET 269
F.R. Metzger

Phys. Rev. C V7, 939 (1978)

ELEM. SYM.

Sm 144 62

REF. NO.

78 Me 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G LFT 1- 5 C 5 SCD-D DST

12 LEVELS SELF-ABS

Using electron bremsstrahlung with up to 5.2-MeV end-point energy, the resonant scattering of y rays by

an enriched sample of '“Sm has been studied. Ground-state transitions were observed from a dozen levels, and the scattering yields, measured at 96* and 126*, were evaluated in terms of radiative widths and level

spins. For the strongest excitations, these measurements were supplemented by self-absorption and linear- polarization studies. Some of the observed £1 transitions originate from 1" states which, according to isobaric-analog-resonance studies, contain large neutron-panicle-hole components. On the other hand, the 3.225— and 3.891-MeV levels, which exhibit the strongest £! ground-state transitions, occur at energies which suggest that they arise from the coupling of the lowest octupole vibration to the 2

* and 2j levels.

T.-LU 1

. '.. opt no and widths derived from the yields of

the reaction ) at scattering angles of 93* and

IIS 1. Standard deviations are listed throughout.

(.UeV) .\'(12G°)/.V(96“) Spin

r,; Vr

(meV)

1.660(1) 0.42 ±0.06 2 5.1 ±1.2

2.423(1) 0.47 ±0.08 2 14 ±2

0.58 ±0.20 (2) 4.7 ±0.9

3.223(1) 1.15±0.09 1 220 ±20

3.313(3) 0.3 ±0.3 1.2 11 ±3

3.891(2) 1.22 ±0.17 1 210 ±30

3.905(3) 2.0 ±0.8 (1) 25 ±8

3.966(2) 1.27 ±0.17 1 70 ±10

i.2t2<2) 1.20*0.19 1 170 ±30

5.015(5) 1.10±0.40 (1) 140 ±40

5.103(3) 0.9 ±0.3 1,2 140 ±40

5.151(3) 1.3 ±0.3 (1) 290 ±60

FORM NSS-418 REV. 7.1 4.641 USC OMM-N 0S-OC PHOTONUCLEAR DATA SHEET 270

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS


F. R. Metzger

Phys. Rev. JJ7, B1415-20 (1965)

ELEM. SYM.

Sm 148 62

METHOO

Radioactive source.

REF. NO. 65 Me l NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G,G LFT 1 D 1 NA1-D DST

(1.46) (1.46)

+ 0.6 -13

t = ( 1.4 - 0.3) x 10 sec.

Vahle II. Summary of the transition probabiUties determined

in work, and comparison with the predictions of the single- paru^.e model (Ref. 16). __

Nucleus (MeV)

Transition

Transition

probability (KC"1 )

fl(Elld

(10-»e> cm*)

3(E\)d B(L1W

Sm'“

Sm‘“

1.46

0.91 0.96 0.M

1- -0*

l- -2-

1- -o1- —• 2*

<4J±1.2)X10>*

(2.7 ±0.8) X10»

(11 ±1) X10‘* (U±2)X10>*

0.9

2.3

7.9 15.4

5X10-*

12 X10"* 4X10-* 8X10"*

form NBS-418

(R EV. 7-1 4- 64) U3COMM-OC 20O1O-P04 PHOTONUCLEAR DATA SHEET 273

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR E AU OF STANDARDS
0. V. Vasil' ev, V. A. Semenov, and S. F. Semenko

REF

' Yad. Fiz. 13, 463 (1971)

Sov. J. Nucl. Phys. 13, 259 (1971)

EL EM. SYM. Sm 148 62

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 8-24 C 8-24 BF3-I 4 PI

(8. 1-23. 25) (8. 1-23. 25:

Table IL Parameters of giant dipole resonance

liolop.

•O6

ef

>i

las

>

at tT

A n

408€

>a

tei

>

at u & 7 7 5

iP

a. JL? UlLd s

Nd'** 332 13,8 4.1 2,12 l.on 'Sm‘« 335 14,1 4,0 2, on 0,9ft <Gd‘M 147 12.0 3,0 0,f»93 259 15,0 3,2 1,29 1,09 0,90 1,87 1.25 0,3 Gd" 161 It,

9

2.4 0,612 250 15,0 3.5 1,39 2,0i» 0,89 2,27 1,26 0,29 Gd" 180 11,9 2,6 0,738 243 15,2 3,6 1,37 2,11 0,94 1,86 1,27 0,31 Gd" 165 11.7 2.8 0,662 249 14,9 3,8 1.49 2,18 0,94 2.25 1.2S 0,32 Eu" 285 14,0 4,5 2,02 0.92 Eu" 159 11.9 2.3 0,542 237 15, ij 3,6 1.34 1.90 0,84 2.39 1.27 0,31

FIG. I . Photoneutron cross sections and photoabsorption cross sec- tions of Nd 14*, Sm*4

*, Eu 11

', Eu*’\ Gd'”, Gd'*4

. Gd 1 ** and Gd*“

Statistical and rms experimental errors are shown (the latter horizontal ban at 9.42 MeV, 10.42 MeV etc.) At photon energies above the ( 7, 2n)

threshold the photoabsorption cross section errors are not shown.

form NBS-418

(R ev . 7-1 4-441 U3COMM.OC 20 Ot 0-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 274
- - —--Amulet.. Jsd. - - -

REF

R. Bergere, H. Beil, P. Carlos, A. Lepretre, A. Veyssiere

PICNS-73, Vol. I, p. 525 Asilomar

ELEM. SYM.

Ska

A

148

z

62

METHOD REF. NO.

73 Be 10 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle

TYPE RANGE TYPE RANGE

G, SN ABX o 00 0 CM D 8- 20 BF3-I 4PI

-

rig. i9 Total photoneutron cross section

c(y,n)+ J(y,2n) of Sm isotopes. The

solid lines show the best 1 Lorentz

line fit ( l44 Sm 14 ®Sm 158 Sm) or

2 Lorentz lines fit ( 152 Sm and ls '+ Sin).

Table III

8, (MeV) r, (MeV) 3

( (nb)

l44 Sm 15.30+0.1 4 ,37±0 . 15 334;20

l" 8 Sm 14.82+0.1 5.10+0.20 340±12

150

sa 14.60+0.1 6.00+0.20 3 1 2i20

'ohm NSS-418

IRCV. 7- I 4-441 JSCOMM-N6S-OC PHOTONUCLEAR DATA SHEET 275

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
P. Carlos, H. Bell, R. Bergere, A. Lepretre, A. De Mlniac

,

and A. Veyssiere

Noel. Phys. A225 , 171 (1974)

EL EM. SYM.

Sm 148 62

METHOD REF. NO. 74 Ca 5 egf

RESULT EXCITATION SOURCE DETECTOR

REACTION ENERGY TYPE RANGE TYPE RANGE ANGLE

G,N * ABX 3- 20 D 8- 20 BF3-I 4P1

G,2N ** ABX 13- 20 D 13- 20 BF3-I 4PI

if ( mb

)

1

i i

i i i

* i

' ! m 3 ) I

3C0 h

L

:oo L

100

200

100

Vv .

f

• 4 V__ « ” vsWL / H \

- ' ; \ V

"K

l * ; .* \ .

i' r V

' ** *’4

_ .-r / .

• V, h*f

* 681 -

f

** 682+

S m

* .

1525m

150,Sm

148,Sm

* 1 1 ! i_ I

1 44Sm

J 1 1 L. 10 ’2 14 16 13 20 22

E

t (MeVJ

Fig. 7. Total photoneutron cross sections or(E) of the doubly even samarium isotopes. Best single Lorentz line fits are shown for 144 Sm, u!Sra and l50Sm. For l31 Sm and ls *Sm the best two

Lorentz line fits are presented. Corresponding Lorentz line parameters are given in table 2.

148 Sm

t T(T,n)

i ft Y,2n)

A *

A*A U

10 12 r*nL (over)

14 16 1 8 E

t (MeV)

Fig. 3. Panial photoneutron cross sections la(y, n)+a(y, np)] and <r(y, 2n) of I4 *Sm. :T 276

U.S. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
]

Tasle 2 Lorentz line parameters A (MeV) i (mb) A (MeV) £2 (MeV) ff 2 (mb) rz (m

14*Sm* 15.3 =0.1 384±20 4* -4 Ho

l48 Sm* 14.8 ±0.1 339±12 5.1 =0.2

1 **Sm** 14.1 335 4

130 Sm* 14.6 ±0.1 312±20 6.0 =0.2

1 30 Sm** 13.6 360 5.5 I32 Sm* 12.45±0.10 1 83 ±10 3.2 ±0.15 15.85=0.10 226=10 5.1 -L

l32 Sm** 11.55 400 2.4 14.65 420 . .4. 13 *Sm* 12.35±0.10 192=10 3.35±0. 1

5

16.1 ±0.1 204± 10 5.25=1

f 5 *Sm** 11 204 3 15.25 320 4

* Corresponding to best fits shown in fig. 7. ** Values taken from Vassilijev 23- 2 *) for comparison.

Table 3 Different integrated cross sections as defined in the text

14 *Sm IJ 'Sm 130 Sm 1 32 Sm 1

5

' S

A. (MeV) 21 20 20 20 2 a0 (MeV b) 2 ±0.14 1.94±0.1 2 ±0.14 p II o

r

2.C±

a'0 (MeV • b) 2.63 2.71 2.94 . 2.75 2

6'-

a'o A

1.24 1.25 1.35 1.24 1.2 0.06 ,VZ

<j-i (mb) 131 ±15 134 ±10 141 ±15 144 =10 1 45 a. j (mb • MeV' 1 ) 8.7±0.8 9.5 ±0.7 10.3=0.9 10.6 ±0.7 10.0

23

0. 24

0 .

Vasilljev et al. , Sov. J.Nucl. Phys.

Vasllijev et al. , Sov. J. Nucl. Phys.

10, 263 (1970)

13, 463 (1971)

277
F. R. Metzger

Phys. Rev. C14, 543 (1976)

ELEM. SYM.

Sm 148 62

REF. NO.

7 6 Me 6 hmg

REACTION RESULT excitation ENERGY

SOURCE DETECTOR

angle

TYPE RANGE TYPE RANGE G,G LFT 2 C 1-4 SCD-D DST

(1.465)

N - N

_ll 1 (+3 .6+2.7) %. TABLE I. Properties of the low-lying 1“ levels In the stable even Sm' isotopes.

Isotope £r.=(l-) T0 (meV)

, BJElil^

B(E l)tp. ) N

M4Sm 3.225 220 ±30 3.5±0.5 82 “»Sm 1.465 3.1±0.4 0.5±0.1 86

B0Sm 1.166 5.4 ±0.5 1.8 ±0.2 88

BISm 0.963 7.3±0.6 4.2±0.4 90 “Sm 0.921 7.4±1.0 4.8 ±0.7 92

form N3S-418

(REV. 7* l 4-64) USCOMM-NBS-OC

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 278
ref. B.S. Dolbilkin, S. Ohsawa, Y. Torizuka, T. Saito, Y. Mizuno,

K. Saito

Phys. Rev. C25, 2255 (1982)

EL EM. SYM.

Sm 148 62

METHOO REF. NO.

82 Do 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,E/ 5-33 D 150-215 MAG-D DST

The electron scattering cross sections from the enriched l4*Stn (96.5%) and 1S2Sm

(992%) isotopes have been measured between 5 and 33 MeV excitation energies for incident energies in the range of between 150 and 2L5 MeV and scattering angles of 30*.

35*. and 40". The giant resonances at £,= 14.8 <78/1 11.6 (61/1 ~ ,/3

). 15.5 (82/1 ~ xn

), and 24 (129A~ l/i

) MeV for ‘**Sm were classified according to their momentum transfer dependence. The K splittings of the giant £ 1 ( T= 1 ) and £2 ( T=0, 1 ) resonances for de- formed l32Sm were observed in agreement with a vibrating potential model. The splittings between the K =0* and 2 + components for the isoscalar and isovector quadrupole reso- nances are —2 MeV and —5 MeV, respectively. The fitted parameters classified as the

giant monopole resonance are the same for spherical l4*Sm and for deformed l32Sm. The

difference between the isoscalar giant resonance parameters for resonance energies and

width found from hadron scattering and those for electron scattering is discussed for the

rare-earth region.

Q .38-. 64 FM-1

NUCLEAR REACTIONS l4l,132Sm(e,e'), enriched targets, £<>= 150 to 215 MeV, 0=30*. 35*, 40*. q =0.38 -0.64 fm _l

. Measured d

2<r/dftd£, up to 33 MeV in excitation energy; deduced multipolarity,

excitation energy, width, sum rule exhaustion of giant resonances.

TABLE IV. Comparison between (e,e') results and theoretical results for the giant multipole resonance energy

(MeV).

Isoscalar Isovector

Type Nucleus

Present work Ref. 10

Theory

Ref. 9 Ref. 24

Present work

Theory

Ref. 10 Ref. 9

GMR iaSm 15.5 ±0.3 15.1

l5JSm 15.7+0.3 10.7 10.5

18.3 15.9 GDR iaSm 14.8 14.8

,32 12.0 Sm 12.45 12.3 15.85 16.3 15.0

l4*Sm 11.6+0.2 10.9 11.9 24.3 ±0.4 26.4 10.6+0.2 9.9 11.0 10.5 21.0±0.9 24.1 19.5 GQR l32Sm 11.4+0.4 10.4 12.0 23.2± 1.0 25.2 22.5 12.7+0.4 11.8 13.0 13.1 26.0±0.5 28.8 25.5

(OVER)

U.S. DEPARTMENT OF COmMEPCNATIONAL 3UREAUOP STANDARDS

form MSS-418

(REV. 7*1 USC OMM-OC 26010* P64 PH0T0NUCLEAR DATA SHEET 279
TABLE V. Parameters of the isoscalar GQR in the Sm isotopes.

Nucleus £x (MeV) r

(MeV)

EWSR

(%) Reaction Reference

"“Sm 13.0+0.3 3. 9+0.2 91 ±25 ( a.a') 25 '“Sm 12.4+0.4 2.6+0.4 85 ±15 (a, a') 6 '“Sm 12.1 ±0.2 2.4+0.

2

45+15 (a, a') 8 '“Sm 12.5 3.4 60 (a, a') 26 '“Sm 11.9+0.2 2.9+0.

2

(e,e') 27 '“Sm 12J±0.2 4.3+0.

2

104±25 (a. a') 25 '“Sm 11.6+0.2 3.1±0.2 100±10 (e.e') Present work

l50Sm 11.8+0.2 3.3 ±0.2 (e.e’) 27 10.6+0.2 2.4±0.2 20±5 '«Sm 11.4+0.4 2.7 ±0.2 45 ±9 (e.e') Present work

12.7+0.4 3.0±0.2 35±7

‘“Sm 12.4+0.3 4.7±0.3 102 ± 25 (a, a') 25

'“Sin !2_2 4.5 (a,a’) 7 '“Sm 1 1.8±0.J 3.7 ±0.3 (a~a' ) 3 '“Sm 10.9+0.2 4.5 ±0.2 (e.e’) 27

TABLE VI. Comparison of the GMR parameters in the Sm isotopes obtained from various reactions.

Nucleus et (MeV) r

(MeV)

EWSR

(%) Reaction Reference

'“Sm 15.1 ±0.5 2.9±0.5 100±50 (a, a') 6 '“Sm 14.6±0.2 3.0±0.3 140±40 ( a.a') 8 '“Sm 15.2 2.5 (<a.a'

)

26 '“Sm 15.5 ±0.

5

2.5 ±0.5 100±25

’ <P.P'> 31 '“Sm 14.7 ±0.2 2.9±0.2 67 ±13 ( 3 He,3 He') 32 '“Sm 14.8±0.2 2.4±0. 15 20± 10 (e,e‘) 30 '“Sm 15.5 ±0.3 3.0 ±0.2 100±10 ie,e') Present work

l50Sm 15.1 ±0.25 3.0±0.25 60± 19 < J He.'He’) 32

152Sm 14.8±0.25 3.1 ±0.25 54±9 < 3 He,3 He') 32

132Sm 1 5.7 ±0.

3

3.1 ±0.4 100±20 ie.e') Present work '“Sm 15.5 ±0.5 2.5 ±0.5 100±25 31 '“Sm 14.9±0.3 2.6±0.4 55 ± 1

5

(a.a) 8

280
Sm

A=149

'

Sm

A=149

231

-jrtjr.*.

?tws

.

METHOO

Geller, J. Halpern, and E. G. Muirhead

Rev. UJ, 1302-12 (i960) 5m

REF. NO.

149 62

Betatron; neutron threshold; ion chamber 60 Ge 3 NVB

REACTION EXCITATION SOURCE OETECTOR

RESULT ANGLE ENERGY TV»C RAN OK TYPE R'*NGE G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

Tabu I. Summary and comparison of neutron sqvaration 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.

ItriK'tliHi No. runs Present results Other results Method Reference

Sm14*(7,»)Smla 1 6.4S ±0.16(5.89) 5.87 ±0.28 mass data P

» W. H. Johaaoo. Jr, sad A. O. Nler, Phys. Rev. 109. 1014 (19S7).

Tadle n. Comparison of measured threshold energies with neutron binding energies predicted bv mass data

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

Reaction A/* Observed thresh Cr-(y^)Cr" 7/2 12.18±0.14 VJ (-/,n)Y“ 7/2 11.59±0.08

In ll, (y,a)In ,M 7/2 9.22*0.03

Ct ;J (y,»)Ce‘'1 (7/2)* 7.24±0.07

V<J"‘(T,»)Nd,*‘ 7/2 6.38±0.16

'•^‘’(y.niSm1** 7/2 6.45=0.16

K:-"(y.n)Er“* 7/2 6.65±0.08

7/2 6.69±0.03

9/2 6.31 ±0.07

ni”a (7,n)HPn 9/2 7.85±0.11

~

Mass data Q value Em—Q

I2.053±0.004b 0.13±0.14

0.06±0.41 -0.13*0.43

11.53 ±0.40“

9.35 ±0.43°

6.97 ±0.07'

5.97 ±0.19'

5.S7 ±0.28'

6.45 ±0.06*

6.28 ±0.06*

6.17 *0.06*

7.32 ±0.06*

0.27±0.10

0.41±0.25

0.58±0.33 0.20±0.10

0.64±0.07

0.14±0.09 0.53±0.13

Excited state energy

0.387-* 0.191*

0.690*

0.562*

0.081* 0.088*

0.093* 0.375*

i rimmir.ger. J. M. Hollander, and G. T. Seaborg. Revs. Modem Phys. 30, 585 (1958)

r. Gicse and J. L. Benson. Phys. Rev. 110, 712 (1958).

- ry K. Duckworth, Moss Spectroscopy (Cambridge University Press, New York, 1958) p 177

i/rlcpov and L. K. Peker. Atomic Energy of Canada Limited Report Tr. AECL-457 (unpublished)

. lii'JSSSTj" ' Nier, DpCRe%^lMr;dmn“l9D

S?)!0r ^01 °* S,nCe °f C'‘“ «- “«•» “> «* V2.

. li. Johnson, Jr., and V. B. Bhanot, Phys. Rev. 107, 6 (1957).

r

o

bm N0S* id 7-14. 1441 jSCO»«M-OC P4 4 PHOTONUCLZAR DATA SHEZT 283

u.s. oepahtmentof commerce

NATIONAL BURfAUOT ST*n0*»0!
-
Sm

A=1 50

SM

A=1 50

Sm. A=1 50

235

0. V. Vasilijev, G. N. Zalesny, S. F. Semenko , V„ A. Semenov

Phys. Letters 30B . 97 (1969)

METHOO

Sm 150

REF. NO.

69 Va 2

62

egf

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE G ,XN ABX 8-23 C 8-23 BF3-I 4PI

a»c

are the same as in fig. 2.

?orm NBS»418

(R EV. 7-1 4-04) USC OMM-OC 20C10.P64 PHOTOHUCLEAR DATA SHEET 2S7

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF R. Bergere, H. Beil, P. Carlos, A. Lepretre, A. Veyssiere

PICNS-73, Vol. I, p.525 Asilomar

ELEM. SYM.

Sm

A

150

z

62

METHOD REF. NO. 73 Be 10 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G,SN ABX 8- 20 D 8- 20 BF3-I 4PI

tig. 19 Total photoneutron cross section

a(y,n)+ a(y,2n) of Sm isotopes. The

solid lines show the best 1 Lorentz

line fit ( 144 Sm 148 Sm 150 Sm) or

2 Lorentz lines fit ( 1S2 Sm and 154 Sm).

Table III

E, (MeV) T (McV) o, (mb)

l44 Sm I5.30±0.l 4.37*0.15 384*20

l48 Sa 14.82±0.1 5 . 1 0+0.20 340±12

15 °Sm I 4 . 60*0.

1

6 .00±0 .20 312*20

~orm N&S-418

(REV. 7-14-64) USCOMM-N8S-OC PHOTONUCLEAR DATA SHEET 288

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST ANDARD3

Table 2 Lorcntz line parameters

£, (McV) Oi (mb) I\ (McV) Ei (McV) az (mb) rz ;,Mi

l44 Sm4 15.3 ±0.1 384±20 4.37±0.15

148 Sm* 14.8 ±0.1 339±12 5.1 ±0.2 “8 Sm** 14.1 335 4

li0 Sm* 14.6 ±0.1 312±20 6.0 ±0.2

150Sm»* 13.6 360 5.5

l52 Sm* 12.454-0.10 1 83 ±10 3.2 ±0.15 1 5.S5 ±0. 10 226±10 5.1 -t.

li2 Sm** 11.55 400 2.4 14.65 420 3.4 154Sm* 12.35±0.10 192± 10 3.35 ±0. 1

5

16.1 ±0.1 204±10 5.25±C

134 Sm** 11 204 3 15.25 320 4

* Corresponding to best fits shown in fig. 7. ** Values taken from Vassilijev 23 - 24

) for comparison

Table 3 Different integrated cross sections as defined in the text

l44Sm 148 Sm 1 !0 Sm 132 Sm l5 -Siu I<N-X 21 20 20 20 21 Oo (MeV • b) 2 ±0.14 1.94±0.1 2 ±0.14 2.05 ±0.1 2.07-0.1

o', (MeV • b) 2.63 2.71 2.94 2.75 2.6S a' o A

0.06 NZ

1.24 1.25 1.35 1.24 1.21

cr_[ (mb) 131 ±15 134 ±10 V~1 41 rr 144 ±10 145 ±10

(mb • MeV-1

) 3.7 ±0.8 9.5 ±0.7 10.3±0.9 10.6 ±0.7 iO.f f 0 7

23

0. Vasilljev et al.

24

0. Vasilljev et al.

Sov.J.Nucl.Phys. 10, 263 (1970)

Sov.J.Nucl.Phys. L3, 463 (1971)

290
Fo R- Metzger

Phys. Rev. C14, 543 (1976)

ELEM. SYM.

Sm 150 62

REF. NO. 76 Me 5 hmg

EXCI TATION SOURCE CETECT OP

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE

angle

G / G LFT 2 C 1-4 SCD-D DST

(1.166)

N - N —

x

= (+3. 6+2.7)%

N + N —

II JTABLE I. Properties of the low-lying 1“ levels In the stable even Sm isotopes

.

Isotope wn s „£(£l;l--0'

T, (meV) 10 * B(E l) lp.

'1 N

UiSm 3.225 220 ±30 3.5±0.5 82

1.465 3.1±0.4 0.5±0.1 86 B0Sm 1.166 5.4±0.5 1.8±0.2 88 BISm 0.963 7J±0.6 4-2±0.4 90 1J4Sm 0.921 T.4±1.0 4.8 ±0.7 92

form N3S-413

IR EV. 7-1 4. Q4I USCOXM-Naj-OC

U.S. DEP ARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 291

8m

A= 1 52

Sm

A=1 52

A=1 52

293

REF. ELEM. SYM. A F. R. Metzger

Phys. Rev. JJ7, B1415-20 (1965) Sm

METHOO REF. NO. Radioactive source.

65 Me 1

62

NVB

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE GjG LFT 1 D 1 NA1-D 105

(0.96) (0.96)

T = (3.9 ± 0.4) X 10 ^ sec.

T . ile II. Summary of the transition probabilities determined

aii work, and comparison with the predictions of the single- p^.-.ide model (Ref. 16).

Nucleus {M'V)

Transi- tion

Transition

probability

(see'1 ) B(El)d

(10-»t« cm*)

B(E1)« 3(El)„

1.46 l- -0* (4.3 ±1.2) X10'* 0.9 SX10-*

0.91 1- —• 2* (2.7 ±0.8) XIO** 2.3 12X10-* Sm'« 0.96 1* — 0* (11 ±0X10“ 7.9 4X10**

0.84 1- -.2* (14 =4=2) X10>* 15.4 8 X10-*

form NBS-418

(REV. 7-1 A.S41 USCOMM-DC 260I0-PS4 PHOTONUCLEAR DATA SHEET 295

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
ref. R. B. Begzhanov, A. A. Islamov, and S. V. Starodubtsev

J. Nucl. Phys. (USSR) jj, 250 (1967)

Sov, J. Nucl. Phys. 176 (1967)

EL £M. SYM.

Sm 152 62

METHOD REF. NO.

67 Be 4 HMG

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE G,G LFT 1.0 D 1.0 NAI-D 120

(963 keV)

T = 5.15 ± 0.50 x 10

-14

sec

Tabic 1

^f«Ct keV

Solid source l.K|tiid source 1

a. 10-“ cm1 N (E-p) cols c, lQ-“cnr

.N (Ejj) ||Qs rVh1 N (EpW-V r

*i0^ * *

j

T * ,0"M **

1

963 6.0±0.2 0.0171 7. 1±0.4 0.0202 0.85 t0.02 •J , 8 i0 . \ | 7 . i) x0 ,

8

* We used the values of cr,„ and the calculated value .V = 0.0 1 19.

Number of Neutron* 20

Fig. 2. Dependence of the logarithm of the reduced proba*

bility of the El transition on the number of neutrons for certain even-even nuclei.

form NBS-418

(REV. 7-1 *-941 U3COMM.QC 26010* P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 296
REF. G. K. Tandon and J. A. McIntyre

Nucl. Instr. and Meth. 181 (1968)

ELEM. SYM. A

Sm 152 62

METHOD REF. NO. 68 Ta 2 egf

REACTION RESULT excitation

ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE

G ,G LFT 1 D 1 NAI-D I 90

(963 keV) (963 keV

COMPTON SCTD SOURCE

Table I Lifetime measurements.

Line Mean life ( I0-14 sec) Investigator

963-keV level in “Cu

l 91+6 Avg. of ref. 1,_1°) 2 110 + 16 This measurement

963-keV level in * s *Sm

3 4.3 + 0.3 Avg. of ref. W- S4

) 4 7.1 ± 2.1 This measurement

Ratio r(Cu)/r(Sm)

5 21 ± 2 From 1 and 3 6 16 ± 5 This measurement

18

) J. B. Cumming, A. Schwarzschild, A. W. Sunyar and N. T Porile. Phys. Rev. 120 (I960) 2128.

**) T. Rothem, F. R. Metzger and C. P. Swann, Nucl. Physics 15 (1961) 505.

20

) M. A. Eswaran, H. E. Gove, A. E. Litherland and C. Brouii;. Phys. Letters 8 (1964) 52.

-') I. Marklund. Nucl. Physics 9 (1958) 83.

I.. CirtKl/.ins. Phys. Rev. 109 (1958) 1014. <L <i. Slnite and H. S. Sood. Proc. Roy. Soc. (London) A25*

f PWO) 52.

*•) F. n. Metzger, Phys. Rev. 137(1965) BI4I5.

Fig. II. Level schemes of «Cu and 152Sm below 1000 keV. All energies are in keV.

form NBS-418

(REV. 7-i 4-S4I USC OMM*OC 2S0I0-PS4 PHOTONUCLEAR DATA SHEET 297

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
0. V. VasiLijev, G. K. Zalesny, S. F. Semenko, V. A. Semenov

Phys. Letters 3OB , 97 (1969)

METHOO

62

69 Va 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

angle TYPE RANGE TYPE RANGE G,XN ABX 8-23 C 8-23 BF3-I 4PI

3.11

FORM HBS-410

(R EV. 7-1 4*64) U3COMM.OC 2fl010-P«4

U.S. DEPARTMENT OF COMMERCE

NATIONAL aUREAUOF STANDARDS PHOTONUCLEAR DATA SHEET 298
REF 0. V. Vasil* ev, G. N. Zalesnyi, S. F. Semenko, and V. A. Semenov

Yad. Fiz. K), 460 (1969)

Sov. J. Nucl. Phys. 10, 263 (1970)

| ELEM. SYM. A

Sm 152 62

METHOD

L. I REF. NO.

I 69 Va 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE G,XN ABX 8-22 C 8-22 BF3-I 4PI

. 4J+UL SEE 69VA2

I over

!

FORM NBS-418

(REV. 7-1 4-04) USCOMM.QC 20 010* P0 4 PH0T0NUCLEAR DATA SHEET 299

U.S. OEPAP.TMSNT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table L Giant resonance parameters of Nd14*’ and sm140’ 153’ 154

finuua

Nvctau - N4

**» 8mm 8»*

• 160.0 400.0 204.0 A»4 . SUV 11.26 11.66 11.00 *r.. m«v 3.0 2.4 3.0 e‘*. SUV-4 0.760 1.319 0.962 V »6 270.0 420.0 220.0

Auj. SUV 14.60 14.66 16.26

*r,. SUV to 3.4 4.0

si", SUV* 1 .<196 2.242 2.01 2.26 1.7 2.09

iM. SUV-a 2.406 2.213 2.213 3.079 2.479 O.M -VZ//i 2.140 2.160 2.182 2.203 2,222 0.32 0.20 0.41 0.26 0.20 0.29

«4. * 420 360 A-*. SUV 13.60 13.6 *r4 , suv 6.0 6.6
REF- W. Bertozzi, T. Cooper, N. Ensslin, J. Heisenberg, S. Kowalski,

M. Mills, W. Turchinetz, C. Williamson, S. P. Fivozinsky,

J.W. Lightbody ,Jr. , and S. Penner

Phys. Rev. Letters J28, 1711 (1972)

ELEM. SYM.

Sm

A

152

2

62

METHOD REF. NO. 72 Be 3

. hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range E,E/ FMF 0-1 D 50-105 MAG-D dst

.122, .367 MEV LEVELS

Ground- state rotational band.

FIG. 2. Form factor F for the excitation of the ground-state rotational band; For <7 ^

>1.1 fm* 1 the average of two experimental points la plotted. Error bars shown represent standard deviations due to counting statistics. Where not shown, the standard deviations are smaller than the plotted points

FIG. 1. Spectrum of scattered electrons from !S?Sm at 93.5*. Incident electron energy, 78 MeV. Besides the ground-state rotational band, the 3* level at 1.041 MeV and the 2" level at 1.088 MeV are seen (channel 210).

form N3S-418

(REV. 7-14-34) USCOMM-OC 26010-P64
William Bertozzi

PICNS-72, 39 (1972) Sendai

EL EM. SYM. A Z

Sm 152 62

METHOO REF. NO.

72 Be 13 hvm

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE E,E/ FMF O Q D 50-105 MAG-D dst

-

Fig. 2. Form factor F for the excitation of the ground

state rotational band.

p ° 'J a/cmott* Fo r Qeff “1.1 fro” 1 the averaae of two experimental points is plotted. Error bars

shown represent standard deviations due to counting statistics. Where not shown, the standard

deviations are smaller than the plotted points.

0=. 122.0=. 367 MEV

Fig. 3. Form factor for the 0-2

+ transition, F * 'JoAwr.

The solid curve assunes p(r,e) » 3[1 + exp J-lMil]* 1 and the skin thickness Is constant. The dashed

curve assumes p(r,9) =» p[l + exp 2fS,]“

l wi th a 3 r[l/(l + 2Sl Ylck}. In this last choice the skin thickness actually varies as the radius.

form H3S-418

(REV. 7-I4-64) USCOMM-NBS-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 302
Y. Torizuka, Y. Kojima, T

S. Mitsunobu , M. Nagao

,

PICNS-7 2, p. 171 Sendai

METHOD

Saito, K. Itoh, A. Nakada,

K. Hosoyama, S. Fukuda

Sm

REF. NO. 72 To 6 hvm

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE type range E,E/ SPC 0- 31 D 150-250 mag-d 35

-

Fig. 8. The K-0 and K-l form factors in I!2 Sm calculated by

aa8uaing a deformed Fermi type charge distribution.

LEVELS 11.5. 15.5

(R.BERGEREejal.) 5m (natural)

(T,n)

150 MeV, 35* (q -0-44F -

') 152,Sm

(e.O

L

t

t r W<lkixl500

163 MeV, 35* (q-0-54F'1 )

fr.V

fix 500

300

2)0

-100

0

40

30

250 MeV, SSVq-OJSF-1 )

30 25

*200

20 15 10 E*. (MeV)

E

si 0 2

J 0

Fig. 7. The spectra of the deformed l52 Sm displayed as a function of the momentum transfer. The distinct

peaks are seen at 11.5 and 15.5 MeV.

form M 3S-418 (RCV. 7-1 4- 64) USCOMM-N6S-OC PHOTONUCLEAR DATA SHEET 303

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
REF. R. Bergere, H. Beil, P. Carlos, A. Lepretre, A. Veyssiere

PICNS-73, Vol.I, p. 525 Asilomar

ELEM. SYM.

Sm 152 62

REF. NO.

73 Be 10 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE RANGE TYPE RANGE G.SN ABX 8- 20 D 8- 20 BF3-I 4PI

~

Fig. 13 Partial photoneutron cross-sections

a(Y,n) and o(y,2n) of 1S2 Sm

1'ig. 19 Total photoneutron cross section

c (Y,n)+ o(y,2n) of Sm isotopes. The

solid lines show the best 1 Lorentz

line fit ( 144 Sm 148 Sm 150 Sm) or

2 Lorentz lines fit ( 152 Sra and 154 Sm).

Table IV

E

,‘MeV

r

, MeV

°I . mb ^MeV H^MeV 2mb

152 s» 1 2 ,45±0.

1

3.20*0.15 I83Z10 15.85+0.

1

5.10+0.20 226+10

154 Sm l 2.35±0.

1

3.37*0.15 192+10 18.1 0+0.1 5.25+0.20 204+10

FORM N3S-418

(REV. 7-1 4-64) USCOMM-NBS-OC PHOTOHUCLEAR DATA SHEET 3Q4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
A. M. Goryachev, G.N. Zalesnyi, S.F. Semenko, and B.A. Tulupov

REF Yad. Fiz. 17, 463 (1973)

Sov. J. Nucl. Phys. 1_7, 236 (1973)

EL EM. SYM.

Sm

A

152

z

62

METHOD REP. NO. 73 Go 6 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

type RANGE angle

G.XN ABX O 00 1 tN C 8- 20 BF3-I 4P1

FIG. I . Calculations of the cross section for Sm1 ” by different methods: a, b, c-the PenfoldLeiss method with 1-, 0.S-, and 0.2-MeV spacings; l“l d—the method of Tikhonov; [ l5

l e—the method of Cook; [ **] f— the cross section in c, smoothed as proposed in [ ,7

]

.

16

17

18

A.N. Tikhonov, Dokl . Akad. Nauk SSSR 1_51_, 501 (1963).

A. S. Penfold and J.E. Leiss, Phys. Rev. T_T4_, 1332 (1959).

'/.N. Orlin, Abstracts and Reports at the XXII Conference on Nuclear Spectroscopy and

Structure, Kiev, 1972 (in Russian).

B. C. Cook, Nucl . Instr. and Meth. 24, 256 (1963).

form N3S-41!

IR E V . 7.1 4.641 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 305

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. De Miniac

,

and A. Veyssiere

Nucl. Phys. A225, 171 (1974)

ELEM. SYM.

Sm 152 62

REF. NO. 74 Ca 5 egf

EXCITATION SOURCE DETECTOR

REACTION RESULT ENERGY TYPE RANGE TYPE RANGE

ANGLE

G,N * ABX 8- 20 D 00 1 CM 0 BF3-I 4PI

G,2N ** ABX 13- 20 D 13- 20 BF3-I 4PI

ft mb)

i

• i -1 1 T ; T 1 :

1 T 1 T

200 *

\ ,(••••( * 687-/- ** 638+

(T (mo)

100

*

... . V-'f

v>fv*f -•

_ / • / ' \

i.

’

,

«*' At * l i* * / V. ’--.i

| 154Sm

..V .r • * * ».j. •152.

4-.V-* #

f * %1

"Sm

150. *. Sm_

148,Sm

-j—I

i iii. 1 44Sm

J 1 1 L

10 12 14 16 18 20 22

E

t (MeV)

Fig. 7. Total photoneutron cross sections <tt (£) of the doubly even samarium isotopes. Best single Lorentz lme fits are shown for 144 Sm, l4S Sm and l50 Sm. For 13 *Sm and ls ‘Sm the best two

Lorentz line fits are presented. Corresponding Lorentz line parameters are given in table 2.

200

100

^

152 Sm

Vv

f(T,n )

1 Tl 1,21)1

4*

f

,

\ *

4 ** V

10 12 14

Aj

VV . 1

i .

(Mev)

15 18 (over)

C

T Fig. 5. Partial photoncutron cross sections [a(y, n)~a(y, np)] and c(y, 2n) of l£2 Sm. EET 306

u.s. DEPARTMENT OF COMMERCE

NATIONAL BUR E AU OF STANDARDS
Table 2 Lorentz line parameters Et (McV) <y

i

(mb) rL (MeV) E2 (MeV) az (mb) r2

( \»w i

t44Sm‘ 15.3 ±0.1 384±20 4.37-0.15

14SSm* 14.8 ±0.1 339 ±12 5.1 ±0.2 u,Sm** 14.1 335 4

l30Sm* 14.6 ±0.1 312±20 6.0 ±0.2

130 Sm 44 13.6 360 5.5

1 ”Sm* 1 2.45 ±0. 1

0

oo HI o 3.2 ±0.15 1 5.S5 ±0. 10 226— 10 5.1 it..

132 Sm** 11.55 400 2.4 14.65 420 3.4 134Sm* 12.35^0.10 192±10 3.35±0.15 16.1 ±0.1 o Hi o 5.25 ±c.:;

f 34Sm4 » 11 204 3 15.25 320 "T

* Corresponding to best fits shown in fig. 7. ** Values taken from Vassilijev 23,:4

) for comparison.

Table 3 Different integrated cross sections as defined in the text

l44 Sm 148 Sm 150 Sm l3: Sm 1 5-i Sr Em (MeV) 21 20 20 20 21

(to (MeV • b) 2 ±0.14 1.94±0.

1

2 ±0.14 2-05 ±0.1 2.07_-

a'a (MeV • b) 2.63 2.71 2.94 2.75 2.6i

<7'o A

0.06 NZ

1.24 1.25 1.35 1.24 1.2.

a_i (mb) 131 ±15 134 ±10 141 ±15 144 ±10 145

cr.j (mb • MeV' 1 ) 8.7±0.8 9.5 ±0.7 10.3±0.9 10.6 ±0.7 10.6 -

0. Vasilijev et al.

24

0. Vasilijev et al.

Sov. J.Nucl.Phys. 10, 263 (1970)

Sov. J.Nucl.Phys. 13, 463 (1971)

307
REF.

METHOD

T. Cooper, W. Bertozzi, J. Heisenberg, S. Kowalski,

W. Turchinetz, C. Williamson, L. Cardman, S. Fivozinsky

J. Lightbody, Jr., and S. Penner

Phys. Rev. C13 , 1083 (1976)

ELEM. SYM. A

Sm

REF. NO.

z

152 62

76 Co 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE type range

E,E/ FMF l, l D 49-106 MAG-D DST

-

LEVELS .3665, .1218

TABLE IT. Cross sections from 152 Sm data.

Energy

(MeV)

Angle

(deg)

?«rr (fm"')

da

<&exp (mb)

da

^beuflt (mb)

2

+da

dO exp (mb)

4* da

(mb)

49.60 93.43 0.535 0.400 a 10 ±4% 0.398 xio 0.802 x io"*± 15% • • • 60.53 93.43 0.615 O.llixio =4% 0.109x10 0.545 xl0"'± 10% 0.680 x 10" 3 ± 25%

60.50 145.65 0.S05 ... 0.214 x 10" 1 0.140 xl0" 2 ± 10% 0.961 xio_4 ± 12%

67.08 93.43 0.729 0.190 - 4% 0.188 0.197 xio" * * 7% 0.905 xio" 3 ± 6%

80.38 145.65 0.998 ... 0.524x10" 2 0.195 xl0" s ± 10% 0.300 xio" 3 ± 15%

89.75 93.14 0.827 0.675 xl0*‘± 4% 0.762 x 10" 1 0.590 xi0" 2 ± 7% 0.786 x 10" 3 ± 5%

105.71 93.46 0.947 0.378 xi0"'±8% 0.377 x 10" * 0.130 xio" 2 ± 7% 0.453 x io" 3 ± 5%

104.95 110.79 1.062 ... 0.106 xio* 1 0.809 xi0" J ± 5% 0.933 xi0"4 ± 7%

105.68 146.01 1.216 0.168 xio" 3 ±4% 0.182 xio* 5 0.113 xio" 5 ± 5% £0.38x10"*

TABLE VGI. Deformed Fermi best fit parameters.

Units ,52 Srn l54 Sm 2 “Th 23 'U

fm 5.8044 5.9387 6.7915 6.8054

t fm 0.5314 0.5223 0.5713 0.6049

f> 2 0.237 ± 0.003 0.311± 0.003 0.233= 0.002 0.261± 0.002

04 0.070±0.003 0.087± 0.002 0.101± 0.003 0.037 ± 0.003

06 -0.0120 -0.180 0.0 0.0 B(E2) 3.33 ±0.07 4.40 ±0.09 9.21 =0.09 11.70 ±0.15

B(£4> e

2i

4 0.136± 0.013 0.221 ± 0.010 1.16 =0.05 1.20 ±0.06 rms radius fm 5.0922 5.126 5.7723 5.842

p 2 Transition

radius fm 6.937 6.950 7.895 7.979

p« Transition

radiu3 fm 7.757 7.704 8.540 8.748

form N3S-418

(R EV . 7-1 4-841 USC OMM-N BS-O C

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 308
rsr. A. Nakada, N. Haik, J. Alster, J. B. Bellicard, S. Cochavi

,

B. Frois, M. Huet, P. Leconte, P. Ludeau, M. A. Moinester,

Phan Xuan Ho, and S. Turck

Phys. Rev. Lett. 38, 584 (1977)

EL EM. SYM.

Sm 152 62

method REP. NO.

77 Na 2 hmg

REACTION result EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TVPf RANGE TYPE RANGE E,E/ LFT 0 1 D 252 MAG-D nsT

(.122-. 712)

• -

Elastic and inelastic angular distributions were measured, including that for the 6

+ 2+,4+,6+ STATES

state at 0.712 MeV. Parameters of the charge distribution were determined, and compared with those obtained with low-energy electrons and with mass deformation parameters from q scattering. The data also compared to a Hartree-Fock calculation.

0 IN DEGREES

FIG. 1. Experimental values of a/a^tt for the groundstate rotational band of ,52 Sm, as a function of angle and <7eff =<7(l+$Zo<r2>* ,/2£' 1 ). The solid lines are phenomenological fits (see text) and the dashed lines are the results of the use of HF wave functions.

over

FORM M8S-411

(REV. 7.14-S4) USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 309

U.S. DEPARTMENT O* COMMERCE

NATIONAL SUWCAUOF STANDARDS
TABLE I. Charge and mass distribution parameters of Sm152

.

B(E2) R(£4) B(E6)

Reaction Reference (r2)

1 ' 2 *0 t Pi Pi Po <«2 -b2

) (« 2 • b

2

) (^•b2)

250 MeV Present 5.0246 5.778 0.545 0.28S 0.092 0.010 3.45 0.210 0.0114

( e,e') work ±0.010 ± 0.037 ± 0.002 ±0.002 ±0.002 ±0.06 ±0.013 ±0.0007

Low energy 2.4 5.0922 5.804 0.581 0.287 0.070 - 0.012* 3.38 0.136

(e.e') ± 0.003 ±0.003 ±0.07 ±0.013 Coulomb exci- 5 0.276 0.065 3.45 0.137

tation (a, a') ±0.012 ±0.029 ±0.07 ±0.078

50 MeV 2.15 0.256 0.061 - 0.006

(a, a') HF calcu- 12 4.998 2.99 0.089 0.0027

lation

1 Fixed.

2 D.L. Hendrie, N.K. Glendenning, B.G. Harvey,

O.N. Jarvis, H.H. Duhm, J. Saudinos, and

J. Mahoney, Phys. Lett. 26B, 127 (1968)

4 . W. Bertozzi, T. Cooper, N. Ensslin, J. Heisenberg,

S. Kowalski, M. Mills, W. Turchinetz, C. Williamson,

S.P. Fivozinsky, J.W. Lightbody, Jr., and S. Penner,

Phys. Rev. Lett. 28, 1711 (1972); T. Cooper,

W. Bertozzi, J. Heisenberg, S. Kowalski, W. 'Turchinetz,

C. Williamson, L. Carchian, S. Fivozinsky, J.W. Lightbody,

Jr., and S. Penner, Phys. Rev. C 13^, 1083 (1976).

^T.K. Saylor, J.X. Saladin, I.Y. Lee, and K.A. Erb,

Phys. Lett. 42B, 51 (1972); W. Bruckner, D. Husar,

D. Pelte, K. Traxel, M. Samuel, and U. Smilansky,

Nucl. Phys. A321 , 159 (1974)

12

D. Gogny, in Nuclear Self Consistent Fields,

edited by G. Ripka and M. Porneuf (NorthHoli and, Amsterdam, 1976); J. Decharge,

M. Girod, and D. Gogny, Phys. Lett. 55B , 361 (1975)

15D.L. Hendrie, Phys. Lett. 31_, 478 (1973)

310
ref. B.S. Dolbil kin, S. Ohsawa, Y. Torizuka, T. Saito,

K. Saito

Phys. Rev. C25 , 2255 (1982)

METHOD

Y. Mizuno, EL CM. SYM.

Sm 152 62

REF. NO. 82 Do 6 egf

reaction RESULT excitation ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE E,E/ 5-33 D 150-215 MAG-D DST

Q .38-. 64 FM-1

The electron scattering cross sections from the enriched l4*Sm (96.5%) and l52Sm

(99.2%) isotopes have been measured between 5 and 33 MeV excitation energies for incident energies m the range of between 150 and 215 MeV and scattering angles of 30*.

35*. and 40*. The giant resonances at £x = 14.8 (78/4 -l/3

), 11.6 (61/4 _l/3), 15.5 (82/4 -l/3

), and 24 ( 129.4 _,/3

) MeV for l4,Sm were classified according to their momentum transfer dependence. The K splittings of the giant £ 1 ( T= 1 ) and £2 ( T=0, 1 ) resonances for de- formed IS2Sm were observed in agreement with a vibrating potential model. The splittings between the K =0+ and 2 + components for the isoscalar and isovector quadrupole reso- nances are —2 MeV and —5 MeV, respectively. The fitted parameters classified as the

giant monopole resonance are the same for spherical 14®Sm and for deformed l33Sm. The

difference between the isoscalar giant resonance parameters for resonance energies and

width found from hadron scattering and those for electron scattering is discussed for the

rare-earth region.

NUCLEAR REACTIONS l4,153Sm(e,e'), enriched targets, £0 =150 to 215 MeV, 0 = 30*, 35*, 40*, q =0.38 - 0.64 fm~‘. Measured d

1o/dfldEI up to 33 MeV in excitation energy; deduced multipolarity,

excitation energy, width, sum rule exhaustion of giant resonances.

TABLE IV. Comparison between (e,e') results and theoretical results for the giant multipole resonance energy (MeV).

Type Nucleus

Isoscalar Present work Ref. 10

Theory

Ref. 9 Ref. 24

Present work

IsovectorTheory

Ref. 10 Ref. 9 GMR l4*Sm 15.5±0.3 15.1

l52Sm 15.7+0.3 10.7 10.5

18.3 15.9 GDR '**Sm 14.8 14.8

152Sm 12.45 12.3 12.0 15.85 16.3 15.0

l4*Sm 11.6+0.2 10.9 11.9 24.3 ±0.4 26.4 GQR 10.6+0.2 9.9 11.0 10.5 21.0+0.9 24.1 19.5

l52Sm 11.4+0.4 10.4 12.0 23.2+1.0 25.2 22.5 12.7+0.4 11.8 13.0 13.1 26.0+0.5 28.8 25.5

(OVER)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST ANOAR3S

form NSS-418 REV. 7.| 4-641 USCOMM-OC 2901 O* P4 4 PHOTONUCLEAR DATA SHEET 311
„ . .L. ; i._ —

TABLE V. Parameters of the isoscalar GQR in the Sm isotopes.

Nucleus Em (MeV) r

(MeV)

EWSR

(%) Reaction Reference

'"Sm 13.0±0.3 3.9±0.2 91 ±25 (a,a') 25 '"Sm 12.4+0.4 2.6±0.4 85 ±15 (a, a') 6 '"Sm 12.1 ±0.2 2.4+0.

2

45 ±15 (a, a’) 8 '"Sm 12.5 3.4 60 (a,a") 26 '"Sm 1 1.9+0.2 2.9 ±0.2 (e,e

r

) 27 '"Sm 1Z5±0.2 4.3 ±0.2 104±25 (a,a'

)

25 '"Sm 1 1.6±0.2 3.1 ±0.2 100±10 <e,e') Present work

,50Sm 1 1.8±0.2 3.3 ±0.2 (e,e’) 27

10.6+0.2 2.4±0.2 20±5

l52Sm 11.4+0.4 2.7 ±0.2 45 ±9 ie,e') Present work

12.7+0.4 3.0±0.2 35 + 7

154Sm 12.4+0.3 4.7±0.3 102+25 (a,a') 25

1MSm 122 4.5 (a.a') 7

,34Sm 11.8±0.3 3.7±0.3 (CLOl' ) 3

,54Sm 10.9+0.2 4.5 ±0.2 ie,e') 27

TABLE VI. Comparison of the GMR parameters in the Sm isotopes obtained from various reactions.

Nucleus

E, (MeV) r

(MeV)

EWSR

(%) Reaction Reference

‘"Sm 15.1 ±0.5 2.9 ±0.5 100±50 (a, a') 6 '"Sm 14.6±0.2 3.0±0.

3

140±40 (a.a') 8 '"Sm 15.2 2.5 (a,a') 26 '"Sm 15.5 ±0.5 2.5 ±0.5 100±25 (p,p') 31 '"Sm 14.7±0.2 2.9±0.2 67 ±13 ( 3 He,J He') 32 '"Sm 14.8±0.2 2.4±0. 15 20± 10 (e,e') 30 '"Sm 15.5 ±0.3 3.0±0.2 100±10 (e,e') Present work

150Sm 15.1 ±0.25 3.0±0.25 60± 19 ( 3 He,J He') 32

1S2Sm 14.8±0.25 3.1 ±0.25 54±9 ( J He,3 He') 32

l32 Sm 15.7±0.3 3.1 ±0.4 100±20 (e,e') Present work

,54Sm 15.5±0.5 2.5 ±0.5 100±25 (p,p') 31 '"Sm 14.9±0.3 2.6±0.4 55 ± 1

5

(a.a') 8

312
Sm

A=1 54

Sm

A=1 54

A=1 54

313

Ref. J.H. Carver, W. Turchinetz

Proc. Phys. Soc. J2, 69 (1959)

Elem. Sym.

5m 15^ 62

Ref. No.59 Ca 3

Method 55 MeV Synchrotron; radioactivity; Nal spectrometer; ionization

chamber EH

Reaction E or iE dE J

it Notes

Bremss. ~ 8-32 13.6 6.5 MeV 2.k±0.h MeV-b

Figure S. A, the ratio of activation curves 1MSm(y,n)/ 181Ta(y,n) ; B, activation curve

for 1MSm(y,n); C, derived cross section: 1S4 Sm(y,n).

porm NBS-418

(8-1-63) U3COMM-OC 16896-P83 PHOTONUCLEAR DATA SHEET 315

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Ref. K. Kotajima

Nuclear Phys. _^2) ^9 (19^2)

Method Linac; radioactivity

Reaction E or 4E E

o r

s»

15\?,p) Bremss.

20

form NBS-418

(8-1-83I uscomm-oc iasse- a «3

Elem. Sym. A Z

Sm

Ref. No.

15^ 62

62 Ko 3 JHH

S"6 J

rr Notes

Product nucleus, Pm

1 ^

has T

5.5±0.2 min., E

0 end-pt. = 1 . 65±0.05

MeV, Ey' s = 0.125, 0.180 MeV.

-

, 1/950

Sm

15i; (7,n)

PHOTONUCLEAR DATA SHEET 316

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
C.L. cM . irM. j A L L. G. Moretto, R. C. Gatti, S. G. Thompson, J. T. Routti, J, H. Heisenberg, L. M. Middleman, M. R. Yearian, R. Hofstadter

Phys. Rev. J/72, 1176 (1969) Sm 154 62

METHOO REF. NO.

69 Mo 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE range

E,F ABX thr-999 D 60-999 TRK-I DST

G, F ABX T HR- 999 C 60-999 TRK-I DST

Tabular data given; angular distribution isotopes 999=1 GEV~

Fio. 4. Bremsatrahlung-induced fission cross section per equivalent quantum. Fig. 2. Electron-induced fission cross-section data. Different symbols for the same isotope refer to different targets.

ENERGY tn.U) Fig. 10. Photofission cross section as a function of energy for B^Sm (open squares) as obtained by unfolding the electron- induced fission cross-section data (diamonds) with the El kernel. ^

The solid line is the fit to the electron-induced fission cross sections _ _ _ eues-r ->1?

which is obtained by folding back the photofission cross section NUCLcAR DATA sHEcT ul/

into the £1 kernel.

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAUOF STANDARDS
0. V. Vasili jev, G. N. Zalesny, S. F. Semenko, V

Phys. Letters 30B , 97 (1969)

METHOO

A. Semenov

EL £M. SYM.

Sm 154 62

REF. NO.

69 Va 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

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

3.q

form N8S-418

(REV. 7-1 4- 64) USC OMM-O C 2S010-P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 318
0. V. Vasil'ev, G. N. Zalesnyi, S. F. Yad. Fiz. 10 , 460 (1969)

Sov. J. Nucl. Phys. _10, 263 (1970)

method

Semenko, and V. A„ Semenov | ELEM. SVM.

Sra 154 62

RE e . NO.

69 Va 3 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE

Type RANGE TYPE RANGE G,XN ABX S-22 C 3-22 BF3-L 4PI

SEE 69VA

2

[over]

FORM NBS-418

(R EV. 7-1 4-041 USC OMM-OC 26010.P64 PH0T0NUCLEAR DATA SHEET 319

U.S. DE°ARTMENTOF commerce

NATIONAL BUREAU OF STANDARDS
Table I. Giant resonance parameters oi Nd14*' and sm‘*°’ 1M’‘M

Nuclei* hnoctm

K4* N4»» 8«* 3m** 8mm

mb

• 160.0 400.0 204.0 M*V 11.26 11.55 11.00 »r„. m.v 3.0 2.4 3.0

'

«/*, M*V-» 0.750 1.319 0.962

Sj. ®6 270.0 420.0 320.0

*«!. M«V 14.50 14.65 15.25 *r». m*v 4i.O 3.4 4.0

ai". M»V* 1.005 2.242 2.01 <'/<“ 2.28 1.7 2.00

a***, M»V* 2.406 2.213 2.213 3.079 2.478 0,66 .V2//4 2.140 2.160 2.182 2.203 2,222

2+ 0.32 0.20 0.41

•** 0.28 0.20 0.39

«*. > 420 360 McV 13.63 13.6 *r4, x*v 6.0 5.5

320
’ep- R. Bergere, H. Beil, P. Carlos, A. Lepretre, A. Veyssiere

PIGNS-73, Vol. I, p.525 Asilomar

EL EM. SYM.

Sro 154

REF. NO. 73 Be 1C

62

hmg

REACTION RESULT excitation ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, SN abx 8- 22 D 8- 22 BF3-I 4 PI

-

Fig. i9 Total photoneutron cross section

°(Y,n)+ a(y,2n) of Sm isotopes. The

solid lines show the best 1 Lorentz

line fit ( 14U Sm 1Le Sm 1S0 Sm) or

2 Lorentz lines fit ( I52 Sm ar.d 154 Sm).

Table IV

E

,'MaV

r

, MeV

0

1 . mo ^eV ^eV °2

mb

* ® 2 Sm 12.4540.1 3.2040.15 183410 15.8540.1 5.1040.20 226410

‘S-So 12.3540.1 3 .3740.15 192410 16.1040.1 5.2540.20 204410

form NSS-418

(REV. 7-14-64) USCOMM-N 85-0 C PHOTONUCLEAR DATA SHEET 321

U.S. DEPARTMENT QF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. P. Carlos, H. Beil, R. Bergere, A. Lepretre, A. De Miniac,

and A. Veyssiere

Nucl. Phys. A225 . 171 (1974)

ELEM. SYM. A

Sm 154 62

METHOO REF. NO.

74 Ca 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle

TYPE RANGE TYPE RANGE

G,N * ABX 8- 21 D 3- 21 BF3-I 4PI

G.2N ** ABX 13- 21 D 13- 21 BF3-I 4P1

(T(mb)f “1 T

1 T

!

1 l

1

I—'—[

—

f t mb)

200 |_

*

. . jAt.* vNyr -•

9 * ^

* 690 -f **691+

100 * * * * • r *. •*» - • - f

-. s • i ... t. A m • •

• V 154

/* f * *

i* ,r ,y .

• ^4

S m ^ /

S

U 152

* i o | !• t

*T

.

t

Sm

150,Sm

148,Sm

144.Sm

1 '

1—1—1—i—*—i—*——* i l_j

13 12 14 16 ’3 20 22

E

t (MeV)

Fig. 7. Total photoncutron cross sections aT (E) of the doubly even samarium isotopes. Best single Lorentz line fits are shown for ““Sm, ‘“Sm and ‘«Sm. For ‘“Sm and ‘“Sm the best two Lorentz line fits are presented. Corresponding Lorentz line parameters are given in table 2.

200 L

100

*.

f . t

154 Sm

t T(Y,n)

| T(T,2n)

* **

1 V*

10 12 14 16 18 20 f

, (MeV)

(over)

Fig. 6. Partial photoneutron cross sections [a(y, n)^-a(y, np)] and a(y, 2n) of ‘“Sm. EET 322

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 2 Lorcntz line parameters

£i (MeV) oi (mb) 1\ (McV) £, (McV) CT; (mb) 1\ Mi Vi

14 *Sm* 15.3 ±0.1 384±20 4.37±0.15

145 Sm* 14.8 ±0.1 339±12 5.1 ±0.2

14S Sm** 14.1 335 4

li0Sm* 14.6 ±0.1 312±20 6.0 ±0.2

1J0 Sm** 13.6 360 5.5

1 SJ Sm* I2.45±0.10 i 83± 10 3.2 ±0.15 15.85±O.IO 226± 10 5.i l5J Sm** 11.55 400 2.4 14.65 420 ~ i ‘“Sm* 12.35±0.10 192±10 3.35±0.15 16.1 ±0.1 204±10 5.25±t 2)

I5 '‘Sm*» 11 204 3 15.25 320 4

* Corresponding to best fits shown in fig. 7. »* Values taken from Vassilijev for comparison.

Table 3 Different integrated cross sections as defined in the text luSm ! * a Sm 150 Sm 15J Sm 1 3 *Sr,i Em (MeV) 21 20 20 20 21

ffo (MeV b) 2 3:0.14 1.94±0.1 2 ±0.14 2.05±0.

1

2.07.; 0 I

o'o (MeV b) 2.63 2.71 2.94 • 2.75 2.6',

a’o A

1.24 1.25 1.35 1.24 1.2 0.06 NZ

cr_i (mb) 131 ±15 134 ±10 141 ±15 144 ±10 145 _ 1 )

<r_ 2 (mb MeV-1

) 8.7 ±0.8 9.5 ±0.7 1 0.3 ±0.9 10.6 ±0.7 10.6 3.0 7

^0. Vasil Ijev ec al.

24

0. Vasilijev et al.

Sov. J.Nucl.Phys. 10, 263 (1970)

Sov.J.Nucl.Phys. 13, 463 (1971)

323
T. Cooper, W. Bertozzi, J. Heisenberg, S. Kowalski,

*W. Turchinetz , C. Williamson, L. Cardman, S. Fivozinsky,

J. Lightbody, Jr., and S. Penner

Phys. Rev. C13 , 1083 (1976)

ELEM. SVM.

Sm 154 62

METHOD REF. NO.

76 Co 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

E«S/

FMF 1 , 1 44-106 MAG-D DST

LEVELS . 082, .267

TABLE in. Cross sections from 154 Stn data.

Elastic

> 2* & . do do do do Energy Angle <?«ff dQexp besti'u dfi exp dSicxp (MeV) (deg) (fm* 1

) imb) (mb) (mb) (mb)

44.82 110.22 0.566 0.195 *10 ±370 0.193X10 0.520 xio* 1 • • • 54.73 110.06 0.648 0.507 * 5% 0.495 0.336 xio* 1 0.355 X 10* 3 ± 35%

65.05 110.27 0.734 0.131 ±3% 0.131 0.159 xio* 1 0.712 xio* 3 ± 6%

74.93 110.22 0.817 * 0.545X10* ‘ = 3% 0.580 xio*‘ 0.582 xio* 3 0.727 xi o* 3 ± 5%

85.09 110.24 0.900 0.353 xio* ‘±4% 0.347 <10* 1 0.178 xio* 3 0.577 xio* 3 ± 4%

95.00 109.81 0.981 0.195x10* l -n 0.200 xio* 1 ... 0.351 x 10* 3 ± 20%

100.33 144.97 1.195 0.425 x 10* 3 ±5% 0.411 xio* 3 0.257 xio* 3 0.348 x 10* 5 ± 31%

105.24 110.02 1.068 0.953 xio* 2 = 5rj 0.873 ^10* 3 0.130 X 10* 3 0.139 xi0* 3 ± 8%

FIG. 1. Measured form factors for the elastic (0*) and

the inelastic 0.082-MeV (2*) and 0.267-MeV (4‘) states

in t54Sm. The fitted curves are based on a best fit de- formed Fermi charge distribution.

form N3S-418

(R EV. 7-1 4.841 USCOMM-NBS-OC

TABLE VIII. Deformed Fermi best fit parameters.

Units 152 Srn laSm 2:: Th 23 -u

co fm 5.8044 5.9387 6.7915 6.8054

l fm 0.5314 0.5223 0.5713 0.6049

Pi 0.237 * 0.003 0.311*0.003 0.233* 0.002 0.261*0.002

P* 0.070*0.003 0.037*0.002 0.101*0.003 0.037*0.003

Ps -0.0120 -0.180 0.0 0.0 B(E2) e

3&

3 3.23 *0.07 4.40 ±0.03 9.21 ±0.09 11.70 *0.15

B(E4) e

2b

4 0.136*0.013 0.221*0.010 1.16 =0.05 1.20 ±0.06 rms radius fm 5.0922 5.126 5.7723 5.842 P 2 Transition fm 6.937 6.950 7.895 7.979

radius p4 Transition fm 7.757 7.704 8.540 8.748 radius

U.S. DEPARTMENT OF COMMERCE

NATIONAL. SUREAUOF STANDARDS PHOTONUCLEAR DATA SHEET 324
F. R. Metzger

Phys. Rev. Cl£, 543 (1976)

METHOO

ELEM. SYM.

Sm 154 62

7 6 Me 6 hmg

EXCITATION SOURCE 1 detector

REACTION RESUL T ENERGY TYPE RANGE type range angle

G,G LFT 1 C 1-4 SCD-D DST

(.921)

N - N

-JU -,L = (+3. 6+2.7)%

N + N —

^ TABLE I. Properties of the low-lying 1' levels in the stable even Sm* isotopes.

Isotope fined-) T, (meV) fl(£l)t?. N

«*Sm 3.225 220 ±30 3.5±0.5 82

UJSm 1.465 3.1±0.4 . 0.5±0.1 86 “•Sm 1.166 5.4*0.

5

1.8±0.2 88 “’Sm 0.963 7.3 ±0.6 4 .2 ±0.4 90 ^Sm 0.921 7.4±1.0 t- CO -II © 92

form H8S-418

(R EV. 7-1 4.64) use OMM-N BS-OC PHOTONUCLEAR DATA SHEET 325

u.s. departmentof commerce

NATIONAL BUREAU OF ST ANOAROS
««f. Z. Berant, J. Tenenbaum and R. Moreh

Nucl. Phys. A276, 221 (1977)

EL CM. SYM. A

Sm 154 62

METHOO REF. NO.

77 Be 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE

r DETECTOR

ANGLE TYM RANGE TYPE RANGE

G *G LFT 6 D 6 SCD-D DST

• - 6=6.465 MeV

Table 1 The y-line energies £, of the scattered radiation from ,54Sm together with level energies £, and angular

distribution coefficients A

f>(±3 keV) Intensity A

Present work Refs. *’)•)

£, ( ± 3 keV) r r

6383 67 ±1 0.105 ±0.011 82 2 82.05 2*

5544 8±2 -0.14 ±0.005 921 1 921.7 r

5366 45±1 0.45 ±0.07 1099 0 1099.8 0*

5287 8±2 0.07 ±0.06 1178 2 1177.6 2*

5263 7±1 0.40 ±0.18 1202 (0) 1204 1* 0*

5025 5±3 1440 0.1.2 1440 1*

4709 4±3 1756 0. 1.2 1755.8 2,3

4543 10±2 1922 0,1,2 1923 2,3.4

4479 < 1 1986 0. 1.2 1987 2,3,4

3979 10±2

6465 100 0J4±0.07 6465 r

The spins J

m are obtained from the results of the present work and are based either on the values of A

or on the assumption that the resonance level is deexdted by <±pole transitions only.

*) Only those levels of refs.

*• 3

) are listed which are also observed in the present work.

2 J.M. D'Auria, D. Ostrom and S.C. Guirathi,

Nucl. Phys. A178, 172 (1971)

3 S.A. Elbakr et al., Nucl. Phys. A211, 493

(1973)

Fig. 2. Decay scheme of the 6465 keV level of

l54Sm showing level energies and relative intensities. The level spins are those obtained by

combining the results of the present work

(table 1) and those reported in refs. ,,s

).

Table 4

Values of T, r0, and the energy separation 6 (between the incident y-line and the resonance level)

Scatterer £T (keV) r (meV) r0 (meV) 5(eV)

l44Nd 7163 125±50 41 ±13 13.7 ±0.6

l54Sm 6465 105 ±50 25 ±13 3.6 ±10

form M8S-4I8

(Rev. 7-1 (.Ml USC OMM-N SS-QC PHOTONUCLEAR DATA SHEET 326

U.S. DEPARTMENT OF COMMERCE

NATIONAL BURCAUOF STANOAROS
„ eP G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

JETP Lett. 28, 157 (1978)

Pis'ma Zh. Eksp. Teor. Fiz. 28, 168 (1978)

EL EM. SYM. A

Sm 154 62

methop REX. NO. 78 Gu 7 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

Tvpe RANSE TYPE RAN6C

G,MU-T ABX THR-31 C UKN NAI-D 4PI

• -

The absorption method is used to measure the total photoabsorption cross

section curves for deformed l54Sm, l!6Gd, l6SEr,

l74Yb, IMW, and l36W

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.

Nucleus MeV

a

t mb

rt MeVE 2 MeV

a

2 mb

r2 MeV

r

MeV

<?o

b P

ZN

a /0.06- " L A

l54Sm 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

l68 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

' 74 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

184W 11.9 315 2.9 14.8 321 4.7 6.8 ±0.2 7.2 ± 0.3 0.27 ±0.03 1.50

1 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% ±3.3% — — — *

form N8S*41S

(RCV. 7-14.64) USCOMM-NSS-OC

( 0 /€ r)

U.S. DEPARTMENT OX COMMERCE

NATIONAL. BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 327
°IOi- mb r

FIG. 3. Experimental values of JT = F - — £,) 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, + f,) curve was obtained from the AT curve after introduction of corrections in the interval A = 175-186.
R C r. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

Nucl. Phys. A351 , 257 (1981)

EL EM. SYM.

Sm

A

154

z

62

method REF. NO.

81 Gu 2 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYP* PANGC TVPC PAnGE

G-MU-T ARX THR-20 r ?7 NAT-D 4PT

Abstract: The curves of the total amma-abboronon cross sections < 1 in the El slant resonance enerev range for the nuclei 1 - -“Sm. ‘‘"Gd. '^Ho. '" 8 Er. ‘"‘Yb. ,,8 HE ,,0 Hf. '“'fa. ,8: W. 1S4 W. ,8<> W

and '* Au have been measured usintt the absorption-method. Parameters of the Lorentz curves

fitting the measured cross sections are given. Quadrupoie moments t(? 0

) and nuclear deformation - parameters I/O were obtained. For deformed nuclei in the - 155 < A < '•ISO region a violation of the correlation between

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

of the resonances corresponding lo v 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 = I OS subshell.

FC

IR i OS

Fig. 2. Total nuclear

1 ’"Gd. '"’Ilo. "*“Er.

absorption cross sections I <t„„; measured by the absorption mcthtxi for 1 '‘Stn,,

^ ^ HI- ' Hi- ""Ta. I,2 W. '“W. '""W and Au. R ms error bars are shown. 329

(OVER)

U.S. DEPARTMENT CF COMMERCE NATIONAL BUREAU OP' 3T AM CARDS
Table I

Parameters of Lorentz curves fitting the experimental data on n:ol

E, <T, r, E. <7, r. <T

: r, r

Nucleus (MeV) (mbl ( MeV) (MeV) (mb) (MeV! <r.r, (MeV)

' >4Sm 12.2 188 3.4 15.7 207 5.7 1.85 8.1 156 Gd I2.J 206 3.2 15.7 220 5.'5 1.81 7.7

,os Ho 12.3 202 2.3 15.2 239 4.8 2.47 7.0 “*Er 11.9 222 3.2 15.5 275 4.5 1.73 7.4

1 ’*Yb 12.3 297 2.9 15.5 320 4.9 1.80 7.1

1 "Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2

,s° Hf 12.2 286 <-3.2 15.3 324 5.1 1.81 7.1

l9 'Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8

l«2 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

1.4 °

0 1 1.2 9.3 1.5 % 9.7 ", 4 6 •„ 0.22

0.2

error MeV

T A III i 3

Ratios ol nuclear ellipsoid axes (X ). deformation parameters ( /I) and intrinsic quadrupolc moinents ((>„). calculated from E2

, A',

N uc Icu> ‘“Sm 1 ‘"(.id '"‘Ho "•"lir

1 b '‘"Ilf ‘""Ilf ,BI Ta ‘"-W IK4 W 1

k 1 32(1 1 302 1 259 1.327 1.289 1.296 1.281 1.263 1.271 1.268 1 229

0 5 26 0.309 0 266 0.334 0.296 0.303 0 288 0.270 0.278 0.274 0 235

t

* + 1) 017 + 0 016 ± 0 036 ±0 032 + 0 024 ± 0 032 + 0 036 + 0 026 + 0 030 + 0(132 + 0 033

6 3 62 5.8 7.5 7 0 7 5 7.2 6 9 7.2 7 1 6.2

t 11 3 t" 3 ±0 8 + 07 + 0 6 + 0 8 + 0 9 + 0.7 + 0 8 + 0 8 + 0 9

TaHI I- 4

Integral characteristics of El grant resonance

"•or ^0 ^tlL **111 <*

i « II. a , * 2 L a ,,.3 “

(MeV b) 0 06 SZ .3 (MeV b| 0.06.Y/ 3 (mb) • (mb) (mb) (mb • MeV ) (mb - MeV) Ijib MeV - •)

1 ‘‘Sm 1 94 r <) 06 0 87 2.86 1.29 117 + 3.5 156 0.189 9.1 +0.3 14.3 3.23

1 "(id 2. O' + 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 0

7

8 2.53 1.06 155 + 4.4 160 0.177 10.1+0.3 12.6 2.54 ""T.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

1 4 Yh 2 69-0 ii5 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 2.72-0.06 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 I6.0±0.4 200 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

‘" 4 \V 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

1 --W 2 40 -0 0’ 1 08 3 95 1.48 214+5.3 256 0.241 16.2 ± 0 4 21 6 3.56

: “ Au 3 1 2 - 0 06 1 10 4.37 1.54 229 + 4.2 276 0.241 18 6±0.4 23.3 3.49

330
Eu

Z=63

Europium is a metallic element and the least dense,

softest, and most volatile of the rare earths. Europium

was discovered in 1896 by E. Demarcay and has been used

primarly for research purposes.

Eu

Eu

331
'

'

332
A

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

Target 7.72 MeV 9.00 MeV 9.72 MeV 10.83 MeV

“Co 9.0- 0.8 ’•As 20.4 ± 1.7 «Nb 0.53- 0.10 1 4.6 ±2 2.2 25.3 ± 2.1 ’"Rh 10.6— 1.7 38.8- 3.1

107Ag 1 ‘"A* I 10.0- 1.5 37.6 ± 2.9 “Mn 17.1 ± 2.6 33.3 ± 2.7 mSb 1 ‘“Sb ) © 1! u 42.5 ± 3.6

127

1 38.7- 5.8 38.8± 3.1 ‘“Cs 3I.7± 4.8 52.5— 3.8 IWLa 8.61 — 0.86 40.8- 6.5 63. 0± 5.0 ui Pr 21. 5± 3.2 58.3- 4.1 ’“Eu 1 ’“Eu j

28.9 ± 3.2 6l.3±14.7 102 ±18

’“Ho 35.6 ± 4.3 92.2 ±27.6 150 ±20

’•’Ta 4.14±0.36 45.4 ± 3.7 65.0± 5.5 146 ±12

I,7 Au 44.5 - 3.6 68.4±13.5 160 ±15

«‘Pb <34.3 238 -29

»MPb 22.6 ±11.3 280 ±31

1MBi 36.1 -12.0 226 ±27

u.s. department of commerce

NATIONAL BUREAU OF STANDARDS
334
Eu

A=1 51

Eu

A=1 51

335

rU

A=1 51

cF. tucM. Sr M. K . N. Geller, J. Halpern, and £. G. Muirhead

Phys. Rev. 118 . 1302-12 (i960) Eu 151 65

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

Taolz I. Summary and comparison of neutron sc[>aration 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.

Krili-liiNI No. runs l’rescnt results Other results Method Reference

Eu‘“(y,i»)Eu‘“ 1 8.04 ±0.11

a pm N.V per. 4 'JCOMM.LM 24<M0-P«4 PHOTONUCLEAR DATA SHEET 337

U.S. DEPARTMENT OF COMMENCE

NATIONAL B UR 5*0 OF ST «NO* n OS
S. F. Semenko, 0. V. Vasili jev and V. A. Semenov

Phys. Letters 31B . 429 ( 1970 J

EL EM. SYM. 4

Eu 151 63

METHOD

70 Se 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE type range G,XN ABX 8-24 C 8-24 BF3-I 4PI

<3. mi

2M

«0.

m

M

im

*u

3»

Mr

#L

• •*»*V,\

u*

«• .

' * '»• 'w

#1 —

" t J

<L »<V

, \* % Cd

a

• » »

'S', H W Nd

7L $ma

Nd.SmJ*!’. .. Gd

*

I*'

_ a "

Fig. 1. The variation of the even-even nuclei giant resonance shape with the increase of Z,N in the transitional region N = 90. The photoabsorption curves of ^dxd.

l 5 °Sm, 152cd (tf = 88) 150xd. l54Gd (AT = 90) and la^Gd (N = 02) are presented (From the bottom). The upper

energy scnlo is for Nd, Sm and the lower is for Gd Isotopes. At tho energies groator than (y, 2n) threshold tho photoabsorption cross section was defined from the photo- neutron cross section by usual correction for neutron

multiplicity. Only statistical errors are plotted. The "phase transition" effect in the giant resonance of the nuclei with N - 83 Is emphasized by the vertical line.

000

200

000

200

s'mho.

> • V

a*- y WAV £u

153

r (SI •wr Lu

V * iO S 20 £m#

Fig. 2. The photoabsorption cross sections for i51Eu and 132 Eu.

form N8S-418

(R E V . 7-1 4-04) U3C OMM-OC 20010-P44 PHOTONUCLEAR DATA SHEET 338

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOAROS
. —-i-'-. ii- u.

_• REF.

0. V. Vasil' ev and V. A. Semenov

ZhETF Pis. Red. LI, 520 (1970)

JETP Letters 11, 356 (1970)

ELEM. SYM. A

Eu 151 63

METHOD REF. NO.

70 Va 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE Tvp ANGLE E RANGE G.XN . ABX 8-22 C 8-22 ... BF3-T 4PI

488

r <ab

W

tions and photoabsorption cross sections for Eu 151 and Eu 153

. The graphic symbols are the same as in Pig. 1.

form N3S-413

(REV. 7-1 4-04) USCOMM-OC 20C10-P64 PHOTONUCLEAR DATA SHEET 339

U.S. DEPARTMENT OF COMMERCE

national bureau o^ standards
REF.

METHOD

0. V. Vasil' ev, V. A. Semenov, and S. F. Semenko

Yad. Fiz. 13, 463 (1971)

Sov. J. Nucl. Phys. 13, 259 (1971)

ELEM. SYM.

Eu

REF. NO.

151 63

71 Va 2 hmg

reaction RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ,XN ABX 7-24 C 7-24 BF3-I 4PI

(7. 9-23. 25) (7. 9-23. 25)

Table EL Parameters of giant dipole resonance

(•Stop. A

e0

>4* X

UJ

>2

lT

J. A A

a£

>

*

iai

>

at u

5?

0 a

7 3 Jl/ tftf

Nd** 1 331 13.8 4.1 2.12 1.00 •Sm* 31. l*.l 4.0 2.<W

1

n.911 <Gd“* 1*7 12.0 3.0 0,693 259 15,0 3.2 t,29 1.99 0,90 1,87 1,25 0,28 Cd“ set n.» 2.4 0,612 250 15,0 3.5 1,39 2.00 0,89 2, 27 1,28 0,29 -Gd*" 180 11.9 2.8 0,738 243 15,2 3.6 1.37 2.11 0,94 1.88 1.27 0,31 Gd“* 185 11.7 2,8 0,662 240 14,9 3,8 1.4B 2.16 0,94 2,25 1,28 0,32 Eu“* 285 1*.0 4.5 2.02 0,92 Ee“» 158 11.9 2.3 0,582 237 15,1 3.8 1.34 1,90 0,80 2.30 1.27 0,31

FIG. I. Photoneutron cross sections and photoabsorption cross sec- tions of Nd 144

, Sm144, Eu 1 ” , Eu 1 ”, Gd1 ”, Gd154

, Gd”4 and Gd‘"

Statistical and rms experunentai errors are shown ( the latter horizontal

bars at 9.42 MeV, 10.42 MeV etc.) At photon energies above the (7, 2n)

threshold the photoabsocption cross section errors are not shown.

form NBS-418

(REV. 7-1 4-94) UJCOMM-OC 28010- PSA

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 340
Cu

K. N. Geller, J. Halpern, and £. G. Muirhead

Phys. Rev. 118 . 1302-12 (i960) Eu 153 63

METHOO

Betatron; neutron threshold; ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANCLE

TYPE RANGE TV PC RAN OK G,N N0X THR C THR BF3-I 4 PI

THRESHOLD

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.

UrneliiHi No. runs l'rracnl results Other results Method Reference

Eulu (7,*)Eu‘“ 1 8.65 ±0.13 8.66 ±0.37 mass data P

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

roPM M8S-418

IREV, 7.1 4-441 U9COMM.OC 20 PH0T0NUCLZAR DATA Sl.ZZT 343

U.S. DEPARTMENT OF COMMERCE

NATIONAL. SIMUUOr STANDARDS
REF. U. Atzmony and S. Ofer

Phys. Rev. 145. B915 (1966)

ELEM. SYM.

Eu 153 63

METHOD

Mossbauer effect; Gdg Qj source

REF. NO. 66 At 1 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,G LFT 1 D SCD 4pi

97“ k®V level has either = 3.21 ± 0.22 nm

Or nj = (-0.52 ±0.22) nm

= (2.14 ± .02) x IO

"10 sec.

Fig. 1. 7 spectrum of a Gdl “ source taken with a

Li-drifted Ge detector.

Tasle I. Summary of g . results v.ith .r. ..O -r. . 5 -= T-. Is tit. mcs.:: t r.-lctb of the

A., iorocr in

(%>

r„

(mm/sec)

r, (mm/sec)

.'a

( ctJ

0.\f (°K) Tut

( 10-‘° sec) £u-Oj EuSO«

5.4 ±0.3

2.15±0.2

17.8±0.9

15.3±1.5 6.54±U.55

6.59±0.65

5.7 ±0.4

0.57±0.07 212±5

129±5

2.16±0.20

2.1 ±0.2

form NBS-418

(REV. 7-14.841 USCOMM-OC 28010-P84 PHOTONUCLEAR DATA SHEET 344

U.S. OEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
B. L. Berraan, M. A. Kelly, R. L. Bramblett, J. T. Caldwell

H. S. Davis, and S. C. Fultz

Phys. Rev. _l8jj, 1576 (1969)

Eu 153 63

method REF. NO.

69 Be 3 hmg

REACTION EXCITATION SOURCE OETECTOR

RESULT ENERGY TYPE RANGE TYPE RANGE

angle

G,N* <SS+ ABX 8-29 D 8-29 BF3-I 4PI

G,2N** I54.+ ABX 3-29 D 3- 29 BF3-I 4PI

G,3N *37 ABX 8-29 D 8-29 BF3-I 4PI
Table V. Parameters of Lorcntz-curve fits to the giant resonance.

Nucleus £-(l) (MeV) #(0 • (mb) r(l) (MeV) £L(2) (MeV) o.(2) * (mb) r(2) (MeV)

Eu* 12.33*0.06 155*9 2.75*0.26 15.79*0.10 222*6 5.83*0.30 Tb* b 12.22*0.04 181*6 2.64db0. 16 15.67*0.06 220*4 4.97*0.19 Gd» 12.23:fc0.06 215*9 2.77*0.25 15.96*0.09 233a: 6 5.28*0.30 Ho1 ** 12.28ifc0.02 214*5 2.57db0.11 15.78*0.04 246=fc3 5.00*0.17

Ta«t. 12.59*0.03 171*8 1.94*0.12 15. 13db0. 12 265*6 4.98*0.23 Wue 12.59*0.03 2U±14 2.29*0.14 14.88*0.08 334*8 5.18*0.14

10

R.L. Bramblett, J. T. Caldwell, R. R. Harvey, S.C. Fultz,

Phys.Rev.l^, B369

L1 (1964).

R.L. Bramblett,

J.T. Caldwell, G.F.

Auchampaugh, S.C.

Fultz, Phys.Rev. 129. 2723 (1963)

• The uncertaintie* for r« given hen an relative. The absolute uncer- and subsequent ubiea (tee ten),

taint/ is 7% (10% for Tb» and Ta'»). The data of Ref. ll were remnnlyaed to obtnin the vnlues riven in this b The data efRri. 10 non nnnalysed to obtain the values riven in this sad subsequent tables (see text).

Table VIII. Nuclear rstiius parameter*.

Nucleus Q»“

(b) Refs. * k

>?.*

(I*) O'*(b) Eu« 6.99*0.08 e, ( 0.595*0.015 1.276*0.018 6.80*0.28 Tb* 7.41:fc0.11 e 0.598*0.009 1.274*0.013 7.23*0.26

Gd“» 7.55*0. 17 g 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*0.05 g, j.k 0.390*0.006 1.259*0.011 5.96*0.21

* Values taken from or computed from tho references listed in column J. • P. II. Stetson and L.Grodxias. NucL.Data A 1, 21 (1965). b Values from present data (Table VII). k F. K. McGowan and P. H. Stetson. Phys. Rev. 109, 901 (195S).

• Computed from Eq. (2) in the text. 1 E. M. Bernstein and R. Grattier. Phys. Rev. 119, 1521 (I960). * The "best" values for 0* deduced from the present data, computed fross * R. C. Barrett. S. Bernow. S. Devons. I. Duerdoth. D. Hitiin, J. W.

Eq. (2) in the text, taking R% to be 1.26 ±05)2 P. Kast. W. Y. Lee. B. R. Macagno. J. Rainwater, and C. S. Wu. Columbia

• M. C. Oleran and B. Elbck.Nud.Pbya. 15, 134 (1990). Uaiversity Pegram Nuclear Physics Lab. Report No. NYO-72-191. tons.

1 R. A. Carrigan. Jr.. P. D. Gupta. R. B. Sutton. M. N. SuauU. A. C. p. 74 (unpubUahed). Thompson. X. E. Coif. W. V. Prestwich. A. K. Gulaalaa. and S. Rahov. k R. G. Stokatari and B. Persson. Pbra. Rev. 170. 1072 (IMS).

Phys. Rev. Letters 20, S74 (IMS). Table IX. Integrated cross tactions. -

Nucleus Ey MM

(MeV)

^tmaCCv, *) + dlo«C(*r. 2n) +

(y, *»)]* (t./2u)1«

(MeV-b) (M«V-b)

#tmC(Y.2*)+(T./2«)] i*Cc.(l)r(l) +

(MeV-b> #.«(y, total) k • (McV-b)

0.06 NZ/A

(McV-b)

Eu“ 28.9 1.57 0.67 0.04 0.29*0.04 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

Ho“» 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 0.40*0.05 3.47*0.17 2.67

* All measured integrated crow-section values are riven (or an energy

region (ram threslioid to By mi.

b The word "total** in this table refers to the total photoneotfon crass

•action. #((7. a) + (y. fni + (y. 2a) + (y. >2a) + (y. Jn)|. The uncertainties listed hen are relative; to tet the absolute sneertaiaty. a systematic snrenslaty of T% (10% lor Tho* and Tot") must he

fabled into (be values for #«.

* Not raaaaareit in Kef. 10; #im ((7. 2a) + (y, >2a)| contains

l#l.t(Y. Jo).

* Boenoaa Arams 1* so lour, these values cannot be compared to the rest.

1 Not nismrvri in Ref. II; the (y. 2o> crass taction below 24.0 is MeV

prabnUr asriiribla.

Table X. Integrated moments* of the measured photoncuLron cross section and sum rules.

r-tA-'* (mb)

<r.,K 0.05175 A*

Nucleus (mb) (mb-McV*) 0.00225 AM 0.05175 A* (MeV)

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 11.0*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^,

Tutatu (149) (0. 145) (10.66) (0.82) (0.97*0.13) (28. 1*2.8) / W* 303 . . 0.191 14.51 1.06 1.26*0.11 21.6*1.5

mam

* #-*- / #£-» 4B

JMthw and-C-r—

/"Ermas

/ rB-*d&.

lathe 346

where # la the total photonautran crass sactioa. b Bccansa JtvMa is sa low, the valuta far Ta*« caanot be coaipared to the teat.
S. F. Semenko, 0. V. Vasilijev and V

Phys. Letters 31B , 429 (1970)

METHOD

A. Semenov

Eu 153 63

REF. NO.

70 Se 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE, RANGE TYPE RANGE

G,XN ABX 3-24 C 3-24 BF3-I 4PI

<«r ^61 mi

. -

m

«e-

• • • "H.

,tls

/

1 1*,•V,\

t. Cd

J m

l •*, "* •* * m‘ S*.

*»*

*, j, V

*F| •\* , s.’ *•*„ Gd"

m

i L

>1

V*. , I ( •"v H

f v

vl

w

;-

HSJ V-* cd* V V,

!tte 5na

/[ Nd,SmJJ'.

U

X yu Nd

'

r 0 2L_ £r-W

a

' it

Fig. 1. The variation of the even-even nuclei giant resonance shape with the increase of Z,S in the transitional region N = 90. The photoabsorption curves of ^^Nd.

150sm, 152Gd (

N

* 88) laONd, ia^Gd (IV = 90) and faocd

(IV a 92) are presented (From the bottom). The upper energy scale is for Nd, Sm and the lower is for G<i isotopes. At the energies greater than (y, 2n) threshold the photoabsorption cross section was defined from the photo- neutron cross section by usual correction for neutron

multiplicity. Only statistical errors are plotted. The "phase transition" effect in the giant resonance of the nuclei with N 88 is emphasised by the vertical line.

Mr &ttiIa

2CD\ Mr

,

**

s •

•V

200 y *

(jl

Vav £j»

a* r t5i >0 Lu

10 15 20 itW

Fig. 2. The photoabsorption cross sections for !®%u and

i53 Eu.

FORM M8S-418

(REV. 7.1 4-44) USC OMM.OC 2S010.PS4 PH0T0NUCLEAR DATA SHEET 347

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
REF.

0. V. Vasil' ev and V. A. Semenov

ZhBTF Pis. Red. 11, 520 (1970)

JETP Letters _L1, 356 (1970)

METHOD

EL EM. SYM.

Eu 153

REF. NO.

70 Va 1

63

egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 8-22 C 8-22 BF3-I 4PI

489

4d7 r <Bb

489

m

m

•** |»» H*•*'v. -. H V.

••

!*h- ,W#

VV* - Wntyje.1

Pig. 2. Photoneutron cross sections and photoabsorption cross sections for Eu lil and Eu 153

. The graphic symbols are the

3ame as in Pig. 1.

form N3S-418

(REV. 7-1 4-04) USCOMM-OC 26010-P64 PH0T0NUCLEAR DATA SHEET 348

U.S. DEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF- 0. V. Vasil' ev, V. A. Semenov, and S. F. Semenko

Yad. Fiz. 1_3 , 463 (1971)

Sov. J. Nucl. Phys. L3, 259 (1971)

ELEM. SVM.

Eu 153 63

METHOD 1 REF. NO.

71 Va 2 hmg

reaction RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE

TYPE RANGE TYPE R AN GE

G ,XN ABX 8-24 C 8-24 BF3-I 4 PI

(8. 5-23. 25) (8. 5-23. 25)

Table IL Parameters of giant dipole resonance

IWOR

JD5

o’

>waM

>5

lT

1 A

o

a s

A

s

o'

>a

M*

>

a

cT

•NSg*

6 a J

<T

*

r.

s Jlj &S*

NHWi 333 13,8 4,1 2.12 1 I'M! 333 14,1 4.0 2.»* o.or, <Gd'“ 1*7 12. n 3.o 0.633 233 15,0 3,2 1.29 1.00 «»,oo 1.87 1,23 0,28

’Oil" 1M 11.9 2.* 0,612 230 15,0 3.5 1,39 2,I4> 0,K0 2,27 1.2ft 0.29 Gd" 180 ii. o 2, ft 0,738 243 13,2 3,6 1,37 2,11 0,04 1 ,R»» 1.27 0,3t Gd" 163 11.7 2, ft 249 >4,9 3.8 1,49 3.16 0,04 2.25 1.28 0,32 Eu“* a« 14,0 4,3 2,°2 0,‘»2 E»" is# U.S 2.3 0,542 237 15,1 3.4 1.34 1,90 0,86 2.39 1.27 0,31

•. afc

l; r

M,v Kr

M«V

FIG. I. Phoioncutron cross sections and photoabsorption cross actions of Nd'4

*. Sm144

, Eu ,sl. Eu'“, Gd'”. Gd 154

, Gd*14 and Gd 154

Statistical and rms experimental errors are shown ( the latter horizontal ban at 9.42 MeV, 10.42 MeV etc.) At photon energies above the (t, 2n)

threshold the photoabsorption cross section errors are not shown.

FORM N8S-418

(REV. 7*1 4-64) USCOMM-OC 26010* P64 PH0T0NUCLEAR DATA SHEET 349

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
350
Gd

GADOLINIUM

Z=64

Gadolinium was discovered by J. C. G. de Marignac and P. E.

L. de Boisbaudran. In 1880 Marignac isolated a new rare

earth from samarskite. In 1885 Boisbaudran isolated the

element from Mosander's "didymia" — a mixture of' rare

earths from which the cerium and lanthanum had been

extracted. With Marignac 1 s assent, Boisbaudran named the

new element gadolinia in- honor of the Finnish chemist J.

Gadolin. Elemental gadolinium is a metal resembling steel

and is useful in nuclear reactor work because of its high

thermal neutron absorption cross section of 46,000 barns.

351 Gd

REF. T. Methasiri and S. A. E. Johansson

Nucl. Phys. Al67 . 97 (1971)

I ELEM. SYM.

I Gd 64

REF. NO.

71 Me 1 egf

RESULT excitation SOURCE oetector

REACTION ENERGY type range type range

ANGLE

G,F ABY THR-900 C 300-900 FRG-I 4PI

Table 1 The constant fission cross sections above the threshold

Element <rf (cm1) Element (cm1

)

Pb (5.0±0.2)xl0* iT La (1.1 +0.1) x 10-** Au (1. 7+0.1) x 10“ ,T Sn (4.3±l.l)xl0-** Ta (3.3 ±0.2) x 10- 2t Ag (8.4±2.0)xl0-*»

Yb (1. 2±0.2) x lO"** Mo (1. 7+0.4) x 10" J * Ho (5.5±0.3)X 10-1 * Cu (6.6±1.2)xl0-*»

Gd (5.3+0.8)X 10“** Ni (5.8 +0.1) x 10“** Nd (1.3+0.2)x 10“ a *

[over]

form NBS-418

IR EV. 7-t 4-44) USCOMM-OC 260 1 0« Pfl 4 PH0T0NUCLEAR DATA SHEET 353

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDABDS
(a) (b)

(c) (d)

(e) (0

Fig* 1. Crosj5 sections per equivalent

quantum d (E) as a function of log E,

354
REF.

V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

METHOD

ELEM. SYM.

Gd

REF. NO. 76 Em 2

64

egf

REACTION RESUL T excitation

ENERGY

SOURCE OETECTOR

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 ov assumed constant from £0 to 1000 MeV999 = 1 GEV

Element Z

z!A

(mb)

£o (MeV)

<Tk (mb)

Bi 32.96 113 ±0.6 200 7.6 ±0.6 Pb 32.45 5.4 ±0.4 220 3.6 ±0.3

Tl 3110 4.1 ±0.3 230 2.8 ±0J

Au 31.68 2.0±ai5 240 1.4±02

pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10“ ‘ Re 30.21 (3.7 ±0.3) x 10“ ‘ 280 (2.9 ±0.3) x 10-' W 29.78 (3J ±0.3) x 10" 1 290 (2.8 ±0.3) x 10" ‘ Ta 29.45 (3.3 ±0.3) x 10* 1 300 (2.7 ± 0.3) x 10“ ‘ Hf 29.04 (1.7 ±0.2) x 10* 1 310 (1.4 ±02) x 10-' Yb 28-31 (1.3±0.1)x 10*' 330 (12±0.1)x 10-' Tm 28.18 (7.5 ±0.8) x 10' 1 335 (6.8T±0.8)x 10* 2 Ho 2721 (3.6 ±0.4) x 10 _1 355 (3.5 ±0.4) x 10-2 Dy 26.80 (16 ±0.3) x 10‘ 2 360 (25 ±0.3) x 10“ 2 Tb 26.58 (2.5 ±0.3) x lo

-

2

370 (2.5 ±0.3) x. 10* 2 Gd 26.04 (1.6 ±0.2) x 10" 2 380 (1.7±02)x lO' 2 Sm 25.56 (1.3 ±02) x 10-2 390 (1.4±02) x 10* 2 Nd 24.96 (92 ±0.9) x 10* 3 405 (4 ±0.1) xlO' 2 Ce 24.00 (8 ±0.9) x 10" 1 420 (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 (12 ±02) x 10" 2 460 (1.5±0.3)x 10 _I Te 21.19 (8.8 ± 1 ) x 10" 3 465 (l.2±02) x 10 -2 Sn 21.06 (1.3 ±02) x 10* 2 465 ( 1 .7 ± 0.3) 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 1C 1 470 (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 (14 ±0.5) x 10-' 515 (3.6 ± 0.8) x 10-' Ni 13-35 (14 ±0.5) x 10-' 510 (3.6 ±0.8) x 10" 1 Fe 1110 (3 ±0.6) x 10"

510 (4.4±0.9)x 10-'

Fig. 2. Nuclear fissilities as a function of Z

l ,A. Experimental points: solid circles represent our data:

squares, the data from ref

A

); open circles, the data from ref.

T); zad crosses, the data from tp.f) experi- ments20

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

z/A> 26. The dashed curve is the cune VI calculated by Nix and Sassi 12

). form H3S-418 REV. 7-1 4.04) USCOMM-N8S-OC

4

A.V. Mitrofanova et al.

Sov. J. Nucl. Phys.

512 (1968)

.

7

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.

U.s. OEPARTMENTOF commerce

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 355
.

356
' A=1 52

Gd

A=1 52

A=152

S. F. Semenko, 0. V. Vasil ijev and V. A. Semenov

Phys. Letters 3 IB , 429 (1970)

METHOD

lLcM. i fM. A

Gd 152 64

REF. NO.

70 Se 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE R GE

G,XN ABX 8-24 C 8-24 BF3-I 4PI

HMr

<5. ml

I m • \ .

m

*so

zm

«L

/ Cd

lS*

2m

2m

" V "*•

•’h. , V Vh ft**

V* V Nd

s

Nd"

4

Fig. 1. The variation of the even-even nuclei giant resonance shape with the increase of Z.N in the transitional region N= 90. The photoabsorption curves of '• 48Nd.

150Sm, 152cd (

iV= 88) 150Nd, iS^Gd (.V = 90) and 156Gd (N = 92) are presented (From the bottom). The upper energy scale is for Nd, Sm and the lower is for Gd isotopes. At the energies greater than (y, 2«) threshold the photoabsorption cross section was defined from the photo- neutron cross section by usual correction for neutron

multiplicity. Only statistical errors are plotted. The "phase transition" effect in the giant resonance of the nuclei with M = 33 is emphasized by the vertical line.

000- (o'mbn

200

ooo

zoo

. *

.*# » 'V

qLs Vav £J53

•; *

..rt £U

151 i

^io ^ , is zo Em/

Fig. 2. The photoabsorption cross sections for 15%u and

153 Eu.

FORM NBS-418

(R EV. 7-1 4-S4I USC OMM.OC 2S010-P64 PH0T0NUCLEAR DATA SHEET 359

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF.

0. V. Vasil' ev and V. A. Semenov

ZhETF Pis. Red. 11, 520 (1970)

JETP Letters 11, 356 (1970)

ELEM. SYM. A

Gd 152 64

METHOD

REF. NO.

70 Va 1 egf

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE

G.XN ABX 8-22 C Stl22 BF3-I 4pi

490

490

jut

:ao

no

o M

too

< mb

I*. *•

„* * M .

• • i » *

V

.

*» V.%

fH M

1

Pig. 1. Photoneutron cross sections and cross sections for the

photoabsorotion by the gadolinium isotopes Gd 15 *. 15 *» 1S ‘> (reading upward). The statistical and mean-square errors of

the photoabsorption cross sections are given. (The latter are denoted by horizontal strokes

at the points 9.42 MeV, 10.42

Me*/, etc.) At photon energies

above the threshold of the (y,

2n) reaction, the photoneutron

cross sections, unlike the absorption cross sections, are denoted by circles.

form N3S-418

(R EV. 7-1 4-64) USC O MM- D C 26 010- PC 4 PH0T0NUCLEAR DATA SHEET 360

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
0. V. Vasil' ev, V. A. Semenov, and S. F. Semenko

Yad. Fiz. 13, 463 (1971)

Sov. J. Nucl. Phys. 13, 259 (1971)

METHOD

ELEM. SYM. A z

Gd 152 64

REF. NO.

71 Va 2 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE ANGLE RANGE TYPE RANGE

G ,XN ABX 8-24 C 8-24 BF3-I 4PI

(8. 0-23. 25) (8. 0-23. 25)

Table IL Parameters of giant dipole resonance

totop. A

5

<T

>2M

>a

lT

^, A n

A

f >2

>

2

1 it >T

7

5

•SI a:

<59 III CU

Na*«> 332 13.8 i.i •y 17 1.00 •Sm* 333 14.1 4.0 2 .H8 0,0ft Gd" 1*7 12.0 3.0 0,593 259 15,0 •'.2 1.29 1 .99 0,90 1,87 1.25 0.28 Gd" 181 11.9 2.4 0.812 230 15,0 3,5 1..19 2.1*1 0,89 2,27 1,26 0,29 Gd11* 180 It. 9 2,5 0,733 243 15,2 3,8 1,37 2.11 0.94 1.88 1.27 0,31 Gd" 163 11.7 2.8 0.662 249 14,9 3.8 1.49 2.18 0.94 2.2S 1.28 0,32 Eu" 285 14,0 4.5 2.02 0,92 £•«• 159 11.9 2.3 0.562 Z37 IS.tJ 3.6 1.34 1.90 0,86 2,39 1.27 0,31

FIG. I . Photoneutron cross sections and photoabsorption cross sec- tions of Nd,4#

, Sm14*, Eu 111, Eu 15J

, Gd l5J, Gd 154

, Gd‘“ and Gd 15*

Statistical and rms experimental errors are shown ( the latter horizontal

bars at 9.42 MeV, 10.42 MeV etc.) At photon energies above the (7, 2n)

threshold the photoabsorption cross section errors are not shown.

form NBS-418

(REV. 7-14.041 U3COMM-OC 2S010-P84 PHOTONUCLEAR DATA SHEET 361

U.S. DEPARTMENT OF COMMERCE

NATIONAL auREAUOF STANDARDS
. i : 111 . . :
Gd

A=1 54

S. F. Semenko, 0. V. VasiLijev and V. A. Phys. Letters 3 IB , 429 ( 1970)

METHOD

Semenov

Gd

J REF. NO.

154 64

70 Se I egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,XN ABX 8-24 c 8-24 BF3-I 4PI

m

<3. mi

I *» H

.#1 ./

/

» *»'V •

** • Cd

a

. V

'V. , '*V Cd**

«»

• » .• v.

<u *L

29

V Kid*

1

,-M *V / I*

vl V*- Cd

u

•V. V. »

#1 n'M Sa

a

#1 Nd.SjnJJ'

Gd 1.

\h„, .W*

y

a ii

Fig. 1. The variation of the even-even nuclei giant reso- nance shape with the increase of Z.S in the transitional region N = 90. The photoabsorption curves of H®Nd.

150sm, 152Gd (N - 98) ISONd, l54cd (.V = 90) and 156c<i

(IV = 92) are presented (From the bottom). The upper energy scale is for Nd, Sm and the lower is for Gd isotopes. At the energies greater than (y. 2n) threshold the photoabsorption cross section was defined from the photo- neutron cross section by usual correction for neutron

multiplicity. Only statistical errors are plotted. The "phase transition" effect in the giant resonance of the nuclei with N 83 is emphasised by the vertical lino.

400 f &min

[

. 200 !

400r

1 V

200 / •***, ..ft r i5i Lu

‘0 3 20 E Me/

Fig. 2. The photoabsorption cross sections for i5iEu and

153 Eu.

form NBS-418

(REV, 7.14.641 USC OMM* O C 2901 0- PS 4 PHOTONUCLEAR DATA SHEET 365

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF.

METHOD

EL EM. SYM. A O.V. Vasil'ev and V. A. Semenov

ZhETF Pis. Red. 11, 520 (1970)

JETP Letters 11, 356 (1970) Gd

REF. NO.

70 Va 1

154 64

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G.XN ABX 2=22 G 8-22— BF3-I 4PT

491

r 491

m

m

»

f. *. * \ * »V

V*

.’s V-

/•v/ V" •• •*-V

'

(

fH s*

1

Fig. 1. Photoneutron cross sections and cross sections for the

pnotoabscrotion by the gadolinlum ISCt 0y6o u d > > * (reading upward). The statistical and .ciean-square errors of

the photoabsorption cross sections are given. (The latter are denoted by horizontal strokes

at the' points 9.42 MeV, 10.42

MeV, etc.) At photon energies

above the threshold of the (y,

2n) reaction, the photoneutron

cross sections, unlike the absorption cross sections, are denoted by circles.

form N3S-418

IR EV. 7-1 4-64) USCOMM.OC 260 1 0- P64

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDAROS PH0T0NUCLEAR DATA SHEET 366
I REF.

0. V. Vasil' ev, V. A. Semenov, and S. F. Semenko

Yad. Fiz. L3, 463 (1971)

Sov. J. Nucl. Phys. 13, 259 (1971)

METHOD

ELEM. SYM.

Gd 154

REF. NO.

64

Ll Va 2 REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYPE RANGE ANGLE TYPE RANGE

G ,XN ABX 8-24 C 8-24 BF3-I 4PT

(8. 6-23. 25) (8. 6-23. 25)

Table IL Parameters of giant dipole resonance

Ibhr

A

s

o’

>1* a

ini

>aC

J, A

5 » 0 a

A

1€

>

i

Mi

>au

i A p

a

* 6 a 3

7 *

3 III uTl*

<3T*

N4mi 332 13,8 4.1 2,12 1.00 Sm" 333 14.1 4.0 2, 08 0,96 Gdu* 147 12,0 3.0 0,693 259 15,0 3.2 1,29 1,99 0, Ml 1,87 1.25 0,23 Gd" 161 11 .9 2.4 0,612 250 15,0 3,5 1,39 2,oo 0,89 2,27 1.26 0,29 Gd1 ** 180 11 .9 2.6 0,738 243 15,2 3,6 1 ,37 2,11 0,94 1.86 1.27 0.31 Gd" 155 11.7 2.5 0,662 249 14,9 3,8 1.49 2,16 0,94 2.25 1.28 0,32 Eu“‘ 285 14,0 4.5 2,02, 0,92 Eu" 1S0 11,9 2.3 0,563 237 15,1 3.6 1.34 1,90 0,86 2,39 1.27 0,31

FIG. 1. Photoneutron cross sections and photoabsorption cross seo> tions of Nd ,4\ Sm,4\ Eu m, Eu1M

, Gd'”, Gd'*4. Gd 11* and Gd'1*

Statistical and rmi experimental errors are shown ( the latter horizontal

bars at 9.42 MeV, 10.42 MeV etc) At photon energies above the ( 7, 2n)

threshold the photoabsorption cross section errors are not shown.

form NBS-418

tR SV. 7-1 4-84) USC OMM-OC 280I0-P84 PHOTONUCLEAR DATA SHEET 367

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

Gd

A=1 55

Gd

nliD

A=1 55

U3COMM-OC 18336-P63 PHOTONUCLEAR DATA SHEET 371
REF. A.E. Balabanov, N.N. Delyagin, and Hussein el Sayes

J. Nucl. Phys. (USSR) 209 (1966)

Sov. J. Nucl. Phys. J, 150 (1966)

METHOD

EL EM. SYM. f

Gd 155 64

REF. NO.

Mossbauer Effect 66 Ba 3 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G ,G LFT 1 D 1 NAI-D 1 1

r for 86.5 keV is 0.37 ± 0.06 mm/sec.

f for 60.0 keV is 1 .4 ± 0.4 mm/sec (2.4 ± 0.7) x 10 9 sec.

Resonance absorption spectra of y quanta: a -86.5 keV, and 5 — 60.0 keV, from Gd' ,s in gadolinium oxide, measured with a 190 mg/cnr1 absorber at 80°K. The ordinate gives the intensity of y quanta in relative

units; the absciss, is the velocity v of the source relative to the absorber.

form NBS-418

(REV. 7-14-94) U9C GMM-OC 26010-P94 PHOTONUCLEAR DATA SHEET 372

U.S. DEPARTMENT OF COMMERCE

NATIONAL 0UREAUOF STANDARDS
REF. R.R.

Phys

Stevens Jr.,

Letters 21 . Y.K. Lee and J.C.

401 (1966)

Walker

METHOD

MSssbauer Effect

EL EM. SYM.

Gd 155 64

REF. NO. 66 St 1 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR TYPE RANGE ANGLE TYPE RANGE

G,G LFT 1 D 1 NA1-D i

-

Lower limit for r of 1st excited state is 0.22 nanoseconds.

form NBS-418

I (REV. 7* 1 4» <541

| U3COMM.OC 26010-PQ4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 373
374
'

.
375
S. F. Semenko, 0. V. Vasilijev and V. A. Semenov

Phys. Letters ilB, 429 (1970) _____ _____ -

Gd 156

REF. NO.

70 Se 1

64

egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,XN ABX 8-24 c 3-24 BF3-I 4PI

m

m

<«

6. mi

.*• > , : u

$IS/

1 >*»'v t H

t M

''",h 2d

84

m

W

M *,|, ft jC — I • * •* Gd

20$

• • 1 ,* V.

w

«L w

S/", H

«/

W Nd

a

• ",

400 A \ : \ ¥«

iJii'tt’iWj Sm

a

i[ Nd,Sm_^'.

Gd

wd

a iT £r-W

a h

Fig. 1. The variation of the even-even nuclei giant resonance shape with the increase of Z, iV in the transitional region N - 90. The photoabsorption curves of ‘'^Nd.

130Sm. 152cd (iV* 88) laONd. ia^Gd (JV = 90) and l 33Gd

(S = 92) are presented (From the bottom). The upper energy scale is for Nd, Sm and the lower is for Gd isotopes. At the energies greater than (y, 2n) threshold the photoabsorption cross section was defined from the photo- neutron cross section by usual correction for neutron

multiplicity. Only statistical errors are plotted. The "phase transition" effect in the giant resonance of the nuclei with N - 88 is emphasized by the vertical line.

400

200 WO

200

, s 1/ .

"/? '

10 15 20 EjtW

Fig. 2. The photoabsorption cross sections for 131Eu and

i53 Eu.

form HBS-418

(REV. 7-14-64) U3COMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 377

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REF. 0. V. Vasil' ev and V. A. Semenov

ZhETF Pis. Red. U, 520 (1970)

JETP Letters 11, 356 (1970)

EL EM. SYM. A Z

Gd 156 64

METHOO REF. NO. 70 Va 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE RANGE TYPE RANGE

G ,XN ABX 8-22 G 8-22 BF3-I 4PI

< ab

492

m

t \ t\ • J VY ,

- /Uu ' u *M * 4 s* e

m

.•s A • \

• I 4 • • • y» .* *:

t*id m4

Pig. 1. Photoneutron cross sections and cross sections for the

(reading upward). The statistical and mean-square errors of

the photoabsorption cross sections are given. (The latter are denoted by horizontal strokes

at the points 9.42 MeV, 10.42

MeV, etc.) At photon energies

above the threshold of the (y,

2n) reaction, the photoneutron

cross sections, unlike the absorption cross sections, are denoted by circles.

492

FORM N3S-418

IR EV . 7-1 *-94

1

USCOMM.QC 28010-P84

II. S. DEPARTMENT OF COMMERCE

NATIONAL 3UREAUOF STANDARDS

PHOTONUCLEAR DATA SHEET 378
G.M.

G.V.

m

Nuci

~ETMOO

Gurevich, L.E. Lazareva,

Solodukhov, V.A. Tyutin

Phys. A351 , 257 (1981)

V.M. Mazur, S.Yu. Merkulov, CL CM. SVM.

Gd 156

REF. NO.

64

*

81 Gu 2 hg

REACTION RESULT EXCITATION ENERGY

SOURCE » OETECTOR

angle

TYPf MANGC

1 G,MU-T A8X THR-20 C 27 NAI-D 4PI — •tract: The curves oi the total camma-absorption cross sections i<r,m) in the El eiant resonance energy range for the nuclei '‘"Sm. ‘‘"Gd. ‘"’Ho. '"'Er. l *'lYb. ’’'Hf. "°Hf. ‘"Ta. I,, W. "*W. "*W

and |1

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

fitting the measured cross sections are given. Quadrupoie moments t £)0 ) and nuclear deformation

parameters I/O were obtained. For deiormed nuclei in the - 155 < i < '•ISO region a violation of the correlation between

giant resonance widths ( I

)

and nuclear deformation parameters was found. T, and T,. the widths «

ol the resonances corresponding to vibrations 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 '**Sm. M"Gd. '* 5 Ho. '""Er.

,74Yb. ' 7*"0Hf. "'Ta.

is., is*. I«w.

i Au (;. X). F. » 7-20 MeV: measured total <xt£): deduced integrated <r. Lorentz line parameters. ,54Sm. 1 ’"Gd. "’Ho. '""Er. ‘'"Yb. ,7 '- "®Hf. "'Ta. "*•"* '""W.

'* Au deduced It. Q„. f. giant resonance evolution. Enriched, natural targets.

382

U.S. DEPARTMENT OF COMMEPCa NATIONAL BUREAU OF ITAMOAH3S
a,ot . mb

FIG. 3. Experimental values of AT =» T — — £,) in the region of deformed nuclei with A = 133-186; O—present work and1 ": •—Saclay group: A—Livermore group. Owing to a small systematic deviations of

the absolute values, the ordinate scales for the Saclay and Livermore data are shifted 0.13 MeV upward and downward, respectively. The (T, +• /",) curve was obtained from the AT curve after introduction of corrections in the interval A =• 173-186.

FIG. 2. Total cross sections of the toabsorption of the nuclei "*Sm. '

'••Er. "*Yb. IM W. and “W. The

squared errors are shown.

381
Table 1

Parameters of Lorentz curves fitting the experimental data on ir

101

|

E, n, r, E. <J, r. <r.r. r

Nucleus (MeV) (mb) (MeV) (MeV) (mb) (MeV) <r,r

,

(MeV)

13 *Sm 112 1X8 3.4 15.7 207 5.7 1.85 S.l ,5#Gd 113 - 206 3.2 15.7 220 5:5 1.31 777 ,M Ho 113 202 13 15.2 239 4.8 147 70

... Er 11.9 3.2 15.5 275 4.5 1.73 7.4 '**Yb 113 297 19 15.5 320 4.9 1.80 7.1 '’Hf 112 291 3.1 15.5 334 4.9 1.30 7.2 '»°Hr 112 286 3.2 15.3 . 324 5.1 1.81 7.1 i.i Ta 111 272 3.0 15.0 316 5.1 1.97 6.8 "! W 11.9 267 3.2 14.8 303 5.6 101 6.3 '•-w 11.9 315 19 14.8 321 4.7 1.65 6.3 "•w 110 246 3.3 14.5 332 5.1 . 2.07 6.4 ’•'Au 13.7 535 5.2

Average

1.4". 11.2°, 9.3 a

„ 1-5 ", 9-7 ", 4.6 0.22

o.:

VI

Taiiii 3

Ratios of nuclear ellipsoid axes |i ). deformation parameters t /I) and intrinsic quadrupole moments (()„). calculated from A'..

Nucleus ' **Sm “'C.d ‘"‘llo '""lir '‘Yh ''"HI '*'Ta "‘W ""‘W '"'•w

k 1 32u 1 302 1 259 1.327 1 289 1.296 1.281 L263 1.271 1.268 1.229

fi 0 32b 0 309 . 0 2bb 0.334 0 2'»6 0.303 0.238 0 270 0 278

' (1.274 0 235 P -0 017 -001b z o 036 jtl 032 ±0.024 ± o 032 ±0.036 ±0.026 ±0.030 ±0 tit: ±0 013

6 3 b 2 5 8 7.5 7 0 7.5 7.2 6.9 7.2 7 l 6 2

. o 3 - 0 3 ±0 8 >0 7 ±0 6 rim ±0 9 ±0.7 ±08 -HI K r (I u

m

Tabi i: 4

Integral characteristics of El giant resonance

<T" >*r ^t» esp • <•

i " IL * It •* (7 , " :l a ,, A

I MeV b) 0 tlb.vz A (MeV b) 0 06.V/ A (mb) (mb) (mb) (mb - MeV ‘ ') (mb -MeV ''

) (/ib • MeV * ')

'“Sm 1.94 = 0 06 0.87 186 1.29 117 ±3.5 156 0.189 9.1 ±0.3 14.3 3.23 “’Gd IIP ±0.07 0.91 195 1.30 143 ±4.6 163 0.194 10.5 ±0.4 14.9 3.30 '-Ho l.S6±(l 06 0. 78 153 1.06 155 ±4.4 • 160 0.177 10.1 ±0.3 12.6 2.54 '-Lr 2.24±006 0.92 3 07 1.26 161 ±4.3 197 0.212 12.0 ±0.3 16.0 3 13 ''*Yh 2.bv-t)ti5 1.07 3.82 1.52 195 ±3.4 240 0.247 1 4. 5 ± 0.

3

19.2 3.54 'HI 2 85 -7) 07 III 3.99 1.55 208 ±4.9 247 0.247 15.3 ±0.4 20.2 3 59 '•III 2.72 ±0 06 1.05 4 03 1.56 200 ±4.4 250 0.246 1 5. 1 ±0.3 20 7 3 61 “'Ta 2. 84 ; 0 0’ 1 09 3.81 1.46 210± 5.3 245 0.239 16.0 ±0.4 20.0 3.45

!,; \V 2. 86 ±0.07 1 09 4.01 1.52 211 ±5.3 256 0.248 16.2 ±0.4 21.6 3 70 2."S±0 07 1 05 3.80 1.43 207 ±5.3 251 0.240 1 5.9 ± 0.4 20.9 3.51

1 '-W 2.9ii;()07

'

1 08 3.95 1.48 21 4 ± 5.3 256 0.241 16.2 ±0.4 21.6 3 56 Au 3 1 2 ± 0 06 1 10 4.37 1.54 229 ±4.2 276 0.241 18 6±0.4 23.3 3.49

383
. .

.

'

. 0

384
. Gd

A=1 57

Gd

A=1 57

385

Gd

A=1 57

K. N . Gel ler, J. Halpern, and E. G.

Phys. Rev. 118 . 1302-12 (i960)

NETHOO

Muirhead

Gd 157 64

REF. NO. Betatron; neutron threshold; ion chamber 60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYP| PANGI

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

THRESHOLD

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

UrariHiM No. runs l’rescnt results Other results Method Reference

Gd“, (YjilGd“* 1 6J9 ±0.11 6.32 ±0.06 mass data q

« W. H. Johnson. Jr. and V. B. Bhamx. Phys. Rev. 107. 6 (19S7).

FORM M8S-4i8 IMV

'jzr C?*M.pr J0 •p«4 PHOTONUCLEAR DATA S..E27 387

u.s. oepartmcntof commerce

MA DONAL JUP(Al/Of Pr.MUAno.
'

.

.
'

»

Gd

Af.I 58 '

-

Gd

A=1 58

,

REF. EL EM. 3YM. . A

MeTHOO

0. V. Vasil' ev and V. A. Semenov

ZhETF Pis. Red. 11, 520 (1970)

JETP Letters 11, 356 (1970) Gd

REF. NO.

158 64

70 Va 1 egf

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPI RANG* TYPC RANGE

G ,XN ABX 8-22 C 8-22

-» BF3-I 4 PI

< nb

.v

493

493

t . ^ s .

1 *» v* *

* * .••• . b* * V • * • * i .

•

* iH • /

«» Kt *V.%

Pig. 1. Photoneutron cross sections and cross sections for the

pnocoao sorption sr.e gaaoxiniun isotopes Gd ls n*° m. isi

(reading upward). The statistical and .oean-square errors of

the photoabsorption cross sections are given. (The latter are denoted by horizontal strokes

at the points 9.42 y.eV

,

10.42

MeV, etc.) At photon energies

above the threshold of the (y, 2n) reaction, the photoneutron

cross sections , unlike the absorption cross sections, are denoted by circles.

FORM N 35-4 18 (RCV. 7- 14-441 UfCOMM-OC 2S 010-P04 PHOTONUCLEAR DATA SHEET 391

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR EAU OF STANDARDS
ref. 0. V. Vasil 'ev, V. A. Semenov, and S. F. Semenko

Yad. Fiz. 13, 463 ( 1971 > Sov. J. Nucl. Phys. L3, 259 (1971)

EL EM. SVM.

Gd 158 64

METHOO REP. NO. 71 Va 2 hmg

REACTION

G.XN

RESULT

ABX

EXCITATION ENERGY

7-24

(7.9-23. 25)

SOURCE

7-24

(7.9-23. 25)

OETECTOR

TYPE t RANGE

BF3-I

ANGLE

4 PI

Table 3. Parameters of giant dipole resonance

IRNR s

0*

>•a

iU

>a

ci

i A

s’z

A

Si

>*

M

>au

1 *4

3 - 0 a .2

•*J

*

11/ <SU §

S4“» 33} i3.a 4.1 2.12 1.00

333 14. t 4.0 2.06 0. 1>* •GU" 147 12.0 3.0 0.693 259 15,0 3.2 1.29 1.99 0,113 1.87 1.23 0.28 Gd“* Ifil It.

3

2.4 0.612 250 15,0 3.5 1.39 2,lil 0,hf* 2.27 1.2ft 0.29

•Gd>" ISO 11.9 2.6 0.738 243 15,2 3.6 1,37 2.11 0,04 1.66 1.27 0.31 G4“» IKS It.

7

2.6 0,662 240 14.9 3.8 1.49 2.16 0.34 2.25 1.28 0.32 E«“* 2SS 14.0 4.3 2.02 0.92

taa U.» 2.3 0,582 237 15,1. 3.6 1.34 1.90 0.88 2.38 1.27 0,31

FIG. I. Photoneutron cross sections and photoabsorption cross sec- tions of Nd14*, Sm‘*\ Eu*“. Eu‘», Gd'”. Gd'*4

. Gd”4 and Gd'**

Statistical and rms experimental errors are shown ( the latter horizontal •nat 9.42 MeV, 10.42 MeV etc.) At photon enerpes above the (7, 2n)

threshold the photosbsorpuon cross section errors are not shown.

porm NBS-41C (REV. 7*1 A. SSI USCOMM-OC 2S0I0.P44 PHOTONUCLEAR DATA SHEET 392

U.S. DEPARTMENT OF COMMERCE

NATIONAL SURKAuOF STANOAROS
•»

Gd

A=160

.

Gd

Ref- J.H. Carver, W. Turchinetz

Proc. Phys. Soc. ^9 C 1959 )

Elem. Sym.

Gd 160 6k

Ref. No. 59 Ca 3

Method MeV synchrotron; radioactivity; Nal spectrometer; ionization

chamber EH

Reaction E or <7d E J* Notes

Gd l60

( 7,n) Bremss. - 8-32 13.5 5.3 MeV 2.2±0.k MeV-b

Figure 6. A, the redo of acnvadon curves "•Gd(y,n)/ l,1Ta(y,n); B, acdvation curve

for IMGd(y,n) ; C, derived cross section: l **Gd(y,n).

rosM NBS-418

(S-t-SS) useoMM-oe issss-pss

PHOTONUCLEAR DATA SHEET 395

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS
B. L. Berman, M. A. Kelly, R. L. Brambletc, J. T. Caldwell

H. S. Davis, and S. C. Fultz

Phys. Rev. 185 . 1576 (1969)

'mU CM. 3 f M.

Gd 160 64

methoo REF. NO.

69 Be 3 hmg

reaction RESULT excitation

ENERGY

SOURCE OETECTOR

angle TVPC RANGE TVPC PANCC

ABX 3-29 D 8-29 BF3-I 4PI

G,2N** /fe0 ABX 8-29 D 8-29 BF3-I 4PI

G,3N iu ABX 8-29 D 8-29 3F3-I 4PI

INCLUDES NP

## INCLUDES 2NP

!££±

hl«M>raw mtmkmr, N

Fig. 9. The im ratio R*, nuclear eccentricity «, and intrinsic ouadrupole moment Qt plotted versus neutron number X. The

data were scaled between the value for Gd‘“ and that for \V'“. The absolute scale for Q» is based on a mean radius parameter Rt— 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 VH and VLLl; their average values are 0.06S (17%) for RA, 0.010 (1.9%) for «, and 0.26b (3.7%) for <?*.

[over]

FORM MBS-4U

(MV. 7o!4»«4l USCOMM.OC 2«010-P«4 PH0T0NUCLEAR DATA SHEET 396

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
Taqle V. P.tramcicrs of I.nrcnu-curve fits to the giant resonance.

^ U R.L. BrambLett. J.

Nucleus £.(1) (MeV) e«(l) * (mb) HI) (MeV) £-(2) (MeV) •-(2) • (mb) T(2) (MeV)

T. Caldwell, R. R.

Harvey, S.C. Fultz,

Eu* 12.33*0.06 1554:9 2.754:0.26 15.794:0.10 2224:6 5.834:0.30 Phvs.Rev. 133. B269

u (1964).

Tb* k 12.22*0.04 181*6 2.<H±0.16 15.67dc0.06 2204:4 4.97*0.19 ^R.L. Bramblett,

Gd* 12.23*0.06 2154:9 2.77±0.25 15.964:0.09 2334:6 5.284:0.30 J.T. Caldwell, G.F.

Ho** 12.23*0.02 2144:5 2.57*0.11 15.78*0.0* 2464:3 5.004:0.17 Auchampaugh, S.C.

Ta**** 12.594:0.03 1714:8 1.944:0.12 15.134:0.12 2654:6 4.984:0.23 Fultz ,

n

?hvs .Rev . 12~. W* 12.594:0.03 2114:14 2.29*0.14 14.88dc0.08 3344:8 5.184:0.14 2723 (1963)

* Tlx uncertainties for ra |i«ct here art reintivu. Tbo abaoiuts wear* aad submqucnt table* (see ten). Uiatr i* 7% (10% (or TV** tad Tn1 "). * Tbe data of Ref. II wero reanaiyasd to obtaia tbe vaiaa circa la this k Tbe data of Ref. 10 acre reaaaiyaad to obtaia tbe raiuea circa la this aad aibaeqaeaC table* (aea ten).

Tailk VIII. Nuclear radius parameter*.

Nucleus (b) Reis. « k (10 c.-

(b)

Eu* 6.99*0.08 e»* 0.5954:0.015 1.276*0.018 6.804:0.28 Tb*“ 7.414:0.11 e 0.5984:0.009 1.274*0.013 7.234:0.26 Gd** 7.554:0.17 X 0.645*0.014 1.245*0.020 7.714:0.30 lln* 7.564:0.11 c 0.60(4:0.006 1.2464:0.011 7. 71 ±0.26

Ta* 6.89*0.21 b,» 0.4334:0.010 1.3064:0.025 6.434:0.26

\V**» 5.96*0.05 8/j.b 0.390*0.006 t. 2594:0.011 5.964:0.21

* P. II. Stelaon and L. Gradtias, Xuci. Data Al, 21 (I96S).

k P. K. McGowan and P. H. Stelson. Phys. Rev. 100. 901 (1954).

1 E. M. Deranttn and R. Gractxer. Phyu Rev. 119, l J21 (1940).

* R. C. Barrett. S. Beraow. S. Devon*. 1. Duerdoth. D. Hitlia. J. W.

Kan. W. Y. Lee. E. R. Macacno. J. Rainwater, and C. S. Wa. Columbia

Uaivanity Petram Nuclear Phytic* Lab. Report No. NYO-72-191. 19*4.

p. 74 (unpublished). k R. G. Stnknad aad 3. Ptrtaia. Phya. Rev. 170, 1073 (IMS).

Tail* IX. Integrated croa* teciion*.

Nucleus Ry

(McV)

#imC(t. *> +

(v. *»>]•

(MeV-b)

2n) +

(iiisa.v

*mt(y. 3a) • (JleV-b)

viatCCrt 2*)+(t, /2a) ]

«im(y, l«*tal) * M>-d)r(i)+

#.(2ir(2)3*

(McV-b)

0.06 S7./A

(McV-b)

Eu* 28.9 1.57 0.67 0.04 0.294:0.04 2.70*0.19 2.22 TV* 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 2.874^). 20 2.30 Ho* 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* t 0.40 **0.08 2.59*0.15 2.61 \V* 28.6 1.66 1.19 0.15 0.40*0.05 3.47*0.17 2.67

* Value* taken from or computed from tbe reference* liatad in column J. k Value* from present data (Table VII).

* Computed from Eq. (2) in tbe ten.

4 Thu "bat" value* for Q» deduced from the premntdatn. computed from

Eq. (2) la tbe ten. takinc R* to be l -24 ±0.02 P. •M.C Olcrou aad B. Elbek. Nud. Phym. IS, I J4 (1940).

' R. A. Carrion. Jr. P. D. Gupta. R. B. Sutton. M. N. SoaokL A. C. Thampun. X. E. Cotd. W. V. Prestwick. A. K. Gaicalaa. aad S. Raboy,

Phy*. Rev. Lettan 24, 474 (19*4).

* All mea.urwl intrarated crow, wetion value* art liven for aa anew

reeion from Uireviioid to £, «.

•The word "total" in ibis table refer* to tbe total phutoosotroa com

•action. #l(Y. e) + (y. #> + (% 2n) +(y. yia) + (y. Jn)|.

* The uncertainties liatad here art relative: to cet the abaoiuto *****

taiaty. a 7<miir *url*iary «f 7% (10% far Tb* aad Td*) mam bo

fofclcri into tbe vuioe* for #«.

4 Not measured in Ref. 10; #|M((V. 2a) + (-y. #2a)l contains

|»i*»(y. •)«). * Becauaa By wI* *o low. that value* cannot bo compared to the roc

> Not manured in Ref. 11; th* (y. Jal cram mcuon below 240 i* MoV

probably utcUctbl*.

Table X. Integrated moments* oi the measured photoncuIron cross section and sum rules.

O.OSI75 A"*

r.i #.,A'

#-4/» #-f — #-f Nucleus (mb) (mb) (mb-McV*) 0.00225 A* 0.05175 A*" (McV)

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* * (149) (0.145) (10.66) (0.82) (0.97*0.13) (28.1=2.3)

W* 203 0.191 14.51 1.06 1.26*0.11 21.6*1.5

ft* mm

* W-4- / *E~>4B J*be and rj- ft* mm

/ #£-<d&

/sin* 397

where # la the total lUmtoneutron cm union.

k Bceaua By mm i* 90 low, the values for Ta*a cannot be compared to thoram.
REP.

METHOO

F. Dreyer, H. Dahmen, J. Staude and H. H. Thies

Nucl. Phys. A192, 433 (1972)

ELEM. SYM. A

Gd

REP. NO.

Z

I

160 64

72 Dr 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

TY PC RANOK ANGLE TYP* KANSK _ GgN ABX 6-33 C 6-33 ACT1

4PI G.XP ABX 15-33 C 14-33 ACT -I 4PI

XP=P+NP

^^ Croswection error bars represent the correlated statistical counting errors in the cross

section, calculated according to the least-structure method of Cook »). The energy resolution, i.a. the half-width of the Cook resolution function, is indicated at representative energies by horizontal

errors bars, (a) the , *°Gd(y, n) cross section, present experiment (the cross section is strictly shat for (** Qdty, n)+'*#Gd(y, p)L but the ,4#Gdfy, p) contribution is small as seen from Ag. 3). tb) Same as (a) but here the El giant-rcsonance region is seen with increased resolution, and corre- spondingly increased statistical error ban.

T' ' ' i

i

' » '

.

. «r.4 (w

),.tsw(rr)

1

1

ittl /

1

1

*

i

<tj»

i ;ir

» a C8,

Fig. 3. The ,#*Gd(y, p) +

l4*fy, pn) cross section, present experiment. See also caption of Ag. 2. porm N8S-418 (MV. 7-14-44I UJCOMM-OC 25010.P44 PHOTONUCLEAR DATA SHEET 398

U.S. DEPARTMENT OP COMMERCE

NATIONAL BUS CAU OP STANOAROS
Tb

A=1 59

TERBIIH

Z=65

Carol Mosander separated terbium, in 1843, from the oxide

then called yttria. He named the substance erbia, but since

1877 it has been known as terbia.

Tb

A=1 59

1 399

A=1 59
•• .

•V &
3.G. Chidley, L. Katz, S. Kowalski

Can. J. Phys. $6, ^07 ( 1958)

EL EM. SYM. Tb 159

-C 3 Betatron

REF. NO.

58 Ch 2 N’VB

reaction RESULT excitation

ENERGY

\

SOURCE OETECTOR

ANCLE

TY PC NANCE

G.N RLY THR C THR BF3-I if? I

See 58 Ka 1 for cross sections

TABLE I Measured photoneutron tii resholds

THRESHOLD

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

Tbl**(7. n)TbM S. lOiO ,05

5-4 ia

; i4i

2*. 01 •'*•4

U.S. c- tPARTMe'.: : NATIONAL dURUAy - * • PHOTONUCLEAS SilEET 401
<Z. Fuller, B. Petree, M. S. ys. Rev. JJL2, 55^ ( 1958 )

ilecacron; ion chamber

Weiss

CL CM. SYM.

Tb 159 65

RCF. NO.

58 Fu 1 NVB

REACTION RESULT EXCITATION CNCNOY

sounce OCTCCTOR

angle Tret NANOC

C,XN ABY 7-W C 1-kQ BF3-I IaPI

Table L Target properties and results.

Element

m

Form umd

Weicht gnmt

e*(T.n)e barns

5#<fE* 77I7X

. Mev*b

-r~» Mtv

Sn Sn 4J1 0-50 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 42

Sm Sm*Ot 2.90 026 0.073 8.6 Tb Tb.Or 3.04 029 0.087 8.7 Ho HojOi 1.87 0.41 0.079 7-5 Er EnOi 5.41 0-50 a 100 8.5 Yb Yb,0. 5.57 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

• Is the maximum value and “r** the full width at »*(t.«)/2 of the neutron production crow section corrected for multiple neutron emit, don. Data were not titled with resonance lines to determine these values.

* Integrated neutron production Croat sections corrected for multiple neutrons above (y.ln) threshold.

Tabu IL Energies of resonances in deformed nuclei*

Nucleus Em Mev bun. Method

Em MevEm Mev Em"

Mev

Ei/i* Mev

uTb** 14.7 6.9* CE 11.9 16~2 104 194

..Ho“* to 74* CE 114 16.0 11.0 184

•Er** 144 21* SC 44 174 114 20.0

aEr*** 1U 74* CE 11.6 15.9 114 20.0 r.Ta*« 14.1 12.6* SC 104 15.9 114 174

rsTs*** 14.1 64* CE 11.9 154 114 174 nAu* 154 5.75* SC 124 14.1 114 164

• Cg—Coulomb esdlation: SC—sneetroecooiei Ai/i*. ftws*—energise -l which slant resonance drops to half Its maximum value.

• Adler. Bohr. Huus. Mottclson. and Wlnther. kava. Modem Phys. 2S. 4J2 ( I9S6).

• M. L Pool and D. N. Kundu. Chan of Alewis Nudri (Longs College Book Company, Columbus. IMS).

$• 41 ®

<•04 PHOTONUCI.ZAR DATA SHEET 402

U.S. OePAftTMCNT OF COMMERCi

NATIONAL (IUA(AmO'> > ' - * "> A 1« w S
ref. E.G. Fuller, M.S. Weiss

Phys. Rev. 112, 560 (1958)

EL EM. SYM.

Tb 159 -2

METHOO

Betatron; ion chamber

REF. NO.

58 Fu 2 NVB

reaction RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TVPC (JAN GC type range

G,XN ABX 8-23 C THR-25 BF3-I i4.PI

CF DAN0S THEORY

Tasxx L Resonance parameters.

Tb1 * Ta** Au“» 3„ (Mev) 12.2 14.0 14.2 Em (Mev) 12.5 1145 13.15

F.* (Mb) 253 303 255 r.(Mcv) 2.4 22 19

& (Mev) 16-3 15.45 13.90 n* (Mb) 510 343 365

r* (Mev) 4.0 4.4 4.0

Tabu EL Integral cross sections.

Tb'* Ta** Au“» A JT'tUE/OMNZ U7 UO 1.29

- fwdElf'dE 2.00 116 1.97 AJ\m^,+wi)dE/0.Q6NZ 127 1-15 1.22

Table IIL Intrinsic quadrupole moments, in hams.

Tb*“ Ta‘» Au‘» EJEm l-.30±0.05 1.25=0.01 1.06=0.03

<2, (R«- 1.09X10-“ cm) 5.6 i0.6 5.7 =0-3 1.6 =0.6

Qi (Coulomb excitation) 6.9* 6.3* 2.6"

• Adler. Bohr. Huue. MotceUon. and Winter. Rev*. Modern Phys. 28. <* 12 (1956).

» p. H. Stetson and 7. K. McGowan. Phys. Rev. 99. 112 (1955). *

Fig. 5. Neutron cross section for terbium. Circles and triangles represent independent determmauonsof the aoa

oriffinai data. Errors represent standard deviations on the statistical uncertainues (V«) in the original activation curve aata. ii.c ^TiSpS^^(S+^>)+f(y.7»)+ • • • The smooth curve is calculated from the parameter, given in Table I by

using Eq. (5).

FORM M8S-41S (MV. 7*14*441 USCQMM.OC 24010-P44 PHOTONUCLEAR DATA SHEET 403

U.S. DEPARTMENT OF COMMERCE

NATIONAL BURKAUOF STANOAROS
Lc Katz, G.Bo Chidley

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

USSR: 1953) 571

Tb

J

159

4ETHOO Betatron; neutron cross section; BF^ counters; ion chamber monitor

58 Ka 1

/* —

o:j

NVB

R (ACTION RESULT

excitation

ENEROY

SOURCE

ANCLE TYPE JIANOK A AN 61

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

Tafiauaa 2 Hopotu ucnycKOMUA /fiomOHtdnponoi

Haoron Bn. Mm Bm. Mm Hao-ron Bn. Mm Bm. Mm

V»1 11.16 20.5 Luo 8.8

1

16.1 MnM 10.14 19.2 i Priu 9.46 17.6 Co*" 10.44 18.6 Tiiso 8.16 14.8 As» 10.24 18,1 Ho>« s.to 14.6 Y»# 11.82 20.7 Tn“» 8.00 14.7 Nb*» S.86 17.1 Lul*5 7,77 14,2

RfalOS 9.46 16.8 TaUi 7.65 13.8 jm 9.14 16,2 Auiw 7,96 13.3 Cairn 9.11 164 BiMO 7.43 144

THRESHOLDS

so npuuejtcHU, nocKOJitKy ohw npcuuuzaiOT 22 Msa no nccx cjynaax, icpoMe

aojiOTa, ;ufl KOToporo 5>=-2l Mia. CnoiicTua ccneunii «c(t) cboachu3 Ta6ji...J}, ....

TaSaaaa l Htotoo

J stUHO’ Mm •n (By), 6apn rv Mm

i

V,

liM‘6av

n

Y(22),

10* N«fliiip«M/100 p • wi«>

v« 18.4 0.062 - 54 0,33 1.62 Mn» 20.2 0.060 7.0 0.39 2.01 Co» 18,3 0.068 6.3 0.44 2.30 As1* 16.4 0.090 94 0.74 4,25 Y» 17,1 0,172 5.2 0.93 5.33 Nb« 18.0 0,156 74 1.17 6.80 RhM® 174 0.160 9.4 1.40 8,28 jm 154 0,273 6.8 1.76 11.9 Ca‘M 164 0438 7.7 149 10.7 Lau* 154 0.325 3.8 1.55 114

prui 15.0 0.320 4.9 1.93 13.1 Tb*» 15.6 0474 9.8 2.49 18.1 Ho»«» 13.5 0.305 8.9 242 18.7 Tmw* 16.4 0450 8.4 1.91 14,9 La17* 16.0 0425 8.4 1.90 23.0 -Ta‘« 144 0460 8.5 3.15 22.0 Au‘» 13.8

• 0.475 4.7 3.04 22.6 Bi«* 134 0.455 54 2,89 234

<D

Pic. 12. «— Buxoa OTOBcftTpoiioi ana Tb; 6 — »,(^T

) * «C<T) in»i Tb

ro»M N3S*4U

«• !V,

' MM.OC HOIO.M4

OC^ARTMCNTO^ COMMERCE

NATIONAL lUNCAUOr IT AKiCa^'S

PH0T0NUCLEA8 DATA SMEET 404
Ref- F.R. Metzger, W.B. Todd

Nuclear Phys. 1%, 177 (1959)

Elem. Sym.

Tb 159

Ref. No. 59 Me 1

c5

Method radioactive source; photon scattering; Nal spectrometer NVB

_5

Reaction E or AE ad E J * Notes

Tb(Y,y) 362 kev 3c2 keV Detectors at 125°, 144°.

2

W(0) = 1 + a_ cos 9, where a_ = 0.1±

O.k

Lifetime of y transition to ground

state:

T = (2.0+0. 3) lo

' 10 sec. y

Find transition to be El by K-conversion measurements.

rasM NBS-4U

USCOMM'OC 1SSS4-B43

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS

PHOTONUCLEAR DATA SHEET 405
K. N. Geller, J. Halpern, and E. G. Muirhead

EL EM. SYM. A Phys. Rev. JL18, 1302- L2 (i960)

Tb 159

UgTMOO

Betatron; neutron threshold; ion chamber

ree. no.60 Ge 3

65

NVB

reaction RESULT EXCITATION ENERGY

DETECTOR

- TYRE ANCLE nan ok

G,N N0X THR C THR BF3-I ^

4 PI

' THRESHOLD

Tabu L Summary and companion of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. All energies are expressed in the ccnter-of-mau system in Mev.

Knurl HNI Na runs Present results Other results Method Reference

TW-fvjiiTb1** 3 8. 141±0.039 8.16 ±0.05 threshold f

*owm N 8$*4I8

«»• V. 7*1 4*MI U.S. 0€PA»TM6NTOr COMMERCE

NATIONAL lUMAUOr ITANOAAQt PHOTONUCLEAR DATA SHEET 406
Ref. H.H. Thies, B.M. Spicer

Australian J. Phys. 505 (i960)

Elem. Sym.

Tb

.z

159

Method 18 MeV electron synchrotron; BF^ counters; ion chamber

Ref. No.60 Th 1 EH

Reaction E or AE s

<7d E J n Noces

Tb 159

(Y,xn) 7-18 12. ^±0.2

16.0±0.2

a - 1(-10 mb. max

a = k-60 mb. max

Fig. 8.—CroM motion for photon absorption in '"Tb, using statistical thnory

of nucioar reactions to correct for neutron multiplicity. The factor z is a measure

of the probability that a direct photooffoct will occur. Table 2

(II A NT RESONANCK PARAMETERS IN OKPORMKD NUCLEI

Nucleus ‘"Tb '“Ho l,iTa

Reference Fuller and

Weiss (1038) Present Pnpor Prawnt Pnpor

Fuller and

Woiss ( 1958)

Spicer rt al

.

(1038)

(MeV) an 8-7 ±0-6 7-0-3 8-2±0-2 G- 1 Ex (MoV) 12-5 l2-4±0-2 12- 1 £ 0-2;. 12 43 12-0

(oJmsx. (mbam) 260 410 420 308 500

T, (MoV) 2-4 3-3 2-8 2-3 2-0 Et (MoV) 10.3 l6-0±0-2 16-2 -0-2 13-43 15 3 (s.W (inborn) 310 460 3IO 348 450

r, (MoV) 40 > 4-7 4-4 4-0 Wx 20 2-0 2 0 2- 10 1

• * Et IEt 1-30 1-29 ±0-03 l :u -_n o3 - 1 23-0-01 l 21 • O 03

form HBS-418

(•• 1-631 USCOMM-OC 1 t 836*P63 PHOTONUCLEAR DATA SHEET 407

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OP STANOAROS
Ref. 0. V.Bogdankevich, B. I. Goryachev, V. A. Zapevalov

Zhur.Eksptl. i Teoret.Fiz. kg, 1502 ( 1962)

;

Soviet Phys.JETP lOkb (1962)

Elem. Sym.

Tb 159 65

Method30 MeV Synchrotron - BF^

Ref. No. 62Bol

Reaction E or AE s

ad E J * Notes

(7,n) threshold

21

<7, alb

Best fits of by two (Fig.10) and

three (Fig. 11) Lorentz lines made.

2 Lorentz line approximation less

likely.

Data for Lorentz line fits given in

Table II and Table III.

Table II

Numbel

of Um mb M.V

r. MeV •trt • M.Vb•Mrt •fuf. MaV.b « 9- b

•tali 0.0itMtIA

III

m

267

317

12.5-

16.4 3.4

3.4 1.421 .60 1.10 3.11 1.4 0.28 6.S±0.6

Table m

Number

of Um tmms. mb e. M*v r. M«v •in! • MoV-b •tat 1 -*1*1 8

•tat • M*V-b

•ini

0.0

1 278 12.25 2.5 1.09

II 101 15 3.2 0.96 1.00:0:96:0.96 3.01 1.35

III 305 17 2.0 0.96

9 11 M IS 17 /9 if, MeV na IL Approximation of of Tb*“ by this* Lonoti linos. form NBS-418

(••i-sil UICOMM'OC ««SB«*P6S

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS

PHOTONUCLEAR DATA SHEET 408
REF. R.L. Bramblett, J.T. Caldwell, R.R. Harvey, S.C. FuLtz

Phys. Rev. 133

' . B869-73 (1964)

EL EM. SYM.

Tb

. z

159

METHOD

Positron annihilation; linac; ion chamber

REF. NO. 64 Br 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TV PC Range type range

G.N ABX 8 - 28 D 8 - 28 BF3-I 4PI

G,2N 3WX ABX 14 - 28 D 3 - 28 BF3-I 4PI

Level density parameter

a = 17±5 MeV

_l

PQS ANNIHIL .

Quadrupole moment = 7.0±1.1 barns.

28

o(y,n + y,2n)dE = 2.3±0.2 MeV-bams,

J 8

400

= 300

S .0 i2 :4 is 13 20 22 24 2S 28 PHOTON ENERGYIMeV)

Fig. 4. The (*,-,«) and (y,2n) cross sections of Tbia up to 25 MeV. The (•/,«) cross section decreases rapidly to zero aix.ve the (y,2n) threshold.

400-

g ,0 12 4 6 ia 20 22 24 2« 28 PniTON ENERGY (MeV

)

F;c. 5. The photon a.^orption cross section of Tbia obtained bv addins the < • and (-»,

2

m) cross sections oi Fig. 4. The electric dipoie giant resoi. .r.ce is double peaked due to the quadrupole moment of Tb1 -. The solid carve is the sum ot two Lorentz curves with parameters given in Table HI. The dashed curve is from

Wilkinson (Rei. 9).

Tabu III. Parameters of the Tbl “ giant resonance.

\Reference

(•uramcterS ThU

experiment

Fuller and Weu.*

Thiee and Bogdankerich

Spicer* ti al.*

E. (MeV)

#. (mb)

r. (MeV)

li, (MeV) « (mb)

!•* (MeV)

0. (b) fr*4Ji (MeV b)

12.2 ± 0.2 1S3 ±19

2.67 ± 0.2

15.6 a. 0.2 2JJ ±23

4.30 ± 0.4

4-7.0 ± 1.1 2J ± 0.2

12J

260

2.4

1 6.3 310

4.0

7.7

12.4 ±0.2

4103J

14.0 ±0.2

460

4.3

12J

267

3.4

14,4 317

3.4

7.8

• See kef. 31.

» See Ref. 32.

• See Ret. 30.

FOPM NBS-418

(HIV. 7-1 4>MI U9COMM.OC 26010-Pe4 PHOTONUCLEAR DATA SHEET 409

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAPOS
M. Langevin, J. M. Loiseaux et J. M. Maison

Nuci . Phys. 114-124 (1964)

METHOO

Bremsstrah Lung scattering

ELEM. S

y M. *

Tb 159 65

[Page l of 2]

REF. NO. 64 La 1 JOC

REACTION RESULT excitation

ENERGY

SOURCE OETECTO R ANGLE TYPE RANSe TYPE RANSE

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

Tableau 1 Lb paramttre a(E) de 1b distribution angulaire

11.5-14. MeV 14-17.5 MoV 17.5-20 MeV 20-30 MbV

Noyau

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

Contribution Quadrupolaire %

Tb 0.41 0.39 0.54*®;}* 0.70 0.50 25 0.97 0.85 l Ho a27:«;} 5 0.44 0.407 0.71 0.53 25 0.95 0.9 0.44:0.1 1 Er 0.44 0.407 0.8 :®;} 3 0.71 0.53 25 0.95 0.9 1 Ta 0.6 *0AS ° -O.l 0.53 °-68 -o:i

5 0.81 20 0.96 Au u«,(ll-20MeV) - 0.9 0.7±0.1 1 ju (11-20 MoV) 1

correspondent k (’application des relations de dispersion aux sections riflcares d'absorption de Bogdankevidi tt at. w) dans le cas d’une diffusion purement scaiaire et d’un modBle ellipsoidal ou triaxaL

form NBS-418

(R€V. 7* I 4- sal USCOMM.OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 410

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. M. Langevin, J. M. Loiseaux ec J. M. Maison

Nucl. Phys. 2^, L 14-124 (1964)

METHOD

Bremsstrahlung scattering [ Page 2 of 2

EL EM. S V M. j A

Tb 159

REF. NO. 64 La 1 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYP * range

25%

Fig. 8. Repartitions angulaires du rayonnement diffuse obtenues pour ie terbium. 1’holmium, Terbium et le tantaie dans les zones d'inergie 1 1.5*14 MeV, 14-17.5 MeV et 17.5-20 MeV.

form MBS-411

(R CV. 7-1 4- 941 (JSeOMM-OC 2«010-R«4 PHOTONUCLEAR DATA SHEET 411

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OP STANOAROS
REF. EL EM. SYM. U. Atzmony, C. R. Bauminger and S. Nuclear Phys. 82, 433 (1966)

METHOO

Mb'ssbauer Effect

Of er Tb 159 65

REF. NO. 66 At 2 JDM

REACTION RESULT EXCITATION BHCRGY

\

SOURCE OETECTOR

ANGLE TYRE RANGE

G.G LFT i D SCD-D DST

T. for 58 keV level <; ( 1 ,05±0. 15)

10’ 1 °. Magnetic moment of this level = 1.50±0.10 n.m.

(and perhaps 2.1Q±0.15 n.m. cannot be excluded).

form M8S-418

IRKV. 7* 1 4*44) USC OMM»OC 2«010*P«4 PHOTONUCLEAR DATA SHEET 412

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3T ANOAROS
REF. EL EM. S YM. A Z

I

MCTHOO

R. S. Raghavan

Phys. Rev. 1A5. B9^T (1966) Tb

REF. NO.

159 65

Centrifuge technique 66 Ra 1 JDM

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

. TV PC RANU TYPE RANGE

G,G LFT 1 D 1 NAI- D DST

W » 1 + AgPa( cos0

)

For 363 MeV, Ag » +(24.3±3)$,

For 58O MeV, A, * 0.010.06,

T = (2.210.15) x 10 3 secs,

r = ( 1.110.15) x 10 3 secs.

» sso (I) - 5)*

uv

674

616 380

383.2 34&0

137.5 S&O

0

947

Fio. 1. Decay scheme of Gd,“-Tb“*.

form MBS-41S

(REV. 7-1 4-641 USCOMM.OC 26010-R64 PHOTONUCLEAR DATA SHEET 413

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF. R. Bergere,

Nucl. Phys.

METHOD

EL EM. STM. A H. Beil and A. Veyssiere

A121 . 463 (1968) Tb

REF. NO.

65

63 Be 5 egf

EXCITATION ENERGY

SOURCE OETECTOR

REACTION RESULT TYPE RANGE TYPE RANGE ANGLE

G,N q»+ ABX THR- 30 D 7-30 MOD-T 4PI

G,2N

G,3N %+

Table 6

Lorcntz line parameters for a two line fit to the total cross section data of tJJTb £,(MeV) Oi(mb) A(MeV) Et <*% A

12.12 203 3.25 15.97 240 4.87

300

230

200

130

100

30

<r mb

Experimental points OT(E;) Sum of two Lorentz lines Experimental points <r' (EjJ.oTlE;) —0<Ei)

_i_

FORM HBS-41B

(Rev. 7.I4.A4I USCOMM-OC 2S0t0>Re4

a TMENTOF COMMERCE

JR I AU OF STANOAROS
REF. Y. Oka, T. Bull. Chera

METHOD

Kato and A. Yamadera

Soc. Japan ^1, 1606 (1968)

EL EM. SYM.

Ib

REF. NO.

159

: Z

65

63 Ok 2 egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE TYPE RAN GC TYPE range

G,N ABY THR-20 C 20 ACT1

4PI

ISOMERIC YIELD

Table 1. The particulaju or the (r,n) reaction products and the data obtained WITH 20 MeV BREMSITRAHLUNG

Nuclide

Half-life of product

(«)

Gamma-ray determined

Limit of

detection Yield (mol-'-R -1

) Parent

(Natural abundance, %)

Residual Energy

(MeV)

Branching

ratio (%)

Photopeak

activity (cpm/mg)»>

**Mg(78.60) “Mg 9.9 0.511 200 2.04X10* 0.49 8.1x10*

"Ge(7.67) TsmGe 48 0.139 100 6.37x10* 1.6 1.1x10*

T,Se(23.32) n»s« 17 0.162 100 1.82x10* 0.55 1.2x10* «Mo( 15.36) ,l“Mo 65 0.650 57 2.22x10* 4.5 2.7x10*

14*Ce(88.48) u»n>Ce 58 0.745 100 1.06x10* 0.95 1.3x10*

“*Nd(27.13) “•Nd 64 0.760 100 3.19x10* 3.1 1.4X10*

»*Tb<100) us«Tb 11 0.111 100 2.56x10* 3.8 2.2X10*

a) The value corrected at the end of one-minute irradiation with the dose rate of

10* R/min; Counting geometry is 20% with a 3"dia.x3''NaI(TI) detector.

form MBS-41E

(REV. 7-14-MI USCOMM-OC M0I0-P44 PHOTONUCLEAR DATA SHEET 415

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
REP. L.M. Dautov, Yu. A. Lysikov, U.M. Makhanov, Yu.K. Shubnyi

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

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

Cl. EM. SYM.

Tb 159 65

METHOO REP. NO.

72 Da 14 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPf RANGE TYPE \

" PAN SC

G, G ABX 364* D 364* SCD-D 92

(5.5±.7) *10"28 cm2 »sr

_1

, r 0 y » (3.4±.4) *10“6 eV.

* ENERGY IN REV

Fig. 3. The spectrum of the scattered radiation in the case

1S9Gd 1S9Tb at a source temperature of 1000° C. 1) Terbium scatter; 2) samarium scatter. N » “ hundreds of pulses in 20 min. In nonresonance conditions (T » 20° C) the

scattering from both scatterers was the same N_./N_ » 1.012 ± 0.003. to sm

H3S-41I

IRtV. 7*14.«4t USCOMM.QC 2001 0* P64 PHOTONUCLEAR DATA SHEET 416

U.S. DEPARTMENT OP COMMERCE

NATIONAL SUPKAUOP 9TANOAKS9
RKR. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nucl. Phys. A210, 355 (1973)

SW EM. sYM.

Tb

A

159

2

65

M8THOO Asr, no,

73 Ba 20 egf

REACTION RBSUUT gReiTATISN

iNgSOY

§SUB€g SiTiiTiH

TYRS 9 AN SS TYR6 9AN«e ANOUK

G,N NOX THR- 27

» C 10- 27 RF1-T APT

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 1

3

).

MEAN NEUT ENERGY

1H. 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 a^Ja, versus atomic number A. Here eM is the level density parameter taken from

the neutron resonance work of refs. ‘• I

)1 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.

form N8S-41K

(REV. 7. 14. 84) USCOMM.OC 2«010.R«4

(over)

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 417
Tabu 3 (continued)

Target N

(residual nucleus) *)

Goodness

of fit*) no with

p.c. p.c.

£.(24) T a, (MeV)°) (MeV)") (MeV 1 )*) (MeV- l )0

a«Ja.

Ba 75 1% F 1.16 l6.5-la‘Ba 15J9—lJ‘Ba 0.93 77 2%

78 7%

79 8T. 80 11% •» 81 71%

La 80 100% F F 1.25 0.72 15.5-,3, La 13.76-,J*La 0.89 Ce 81 89% F 3 1.24 0.70 17.0-‘ J *Ce 17.8 -**‘Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-l *°Pr 17.05-‘**Pr 1.00 Tb *) 93 100% 1.15 19.3-l3 *Tb 21.85-l *°Tb 1.14 Dy») 93 2% 1.06 20.9-l “"J Dy* 21.9 —“*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-l **Ho 0.97 Er •) 95 2% 1.11 19Z-,MEr 21.9 -lMEr 1.14 97 33%

98 23%

99 27%

101 13%

Tm 1

) 99 100% 1.03 24.0-“*Tm 22-58-l7<Tm 0.94 Ta 107 100% G 1.00 0.49 26.0-1 ,0Ta 21Z -'“Ta 0.82 W 107 26% G F 0.98 0.50 27.0-lMW 23.0 -,MW 0.85

108 14%

109 31%

111 28%

Au -117 100% G 1.19 17.5—***Au 20.24-‘**Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-,0‘Pb iai -loTPb - 1.35 (Z - 82) ' 124 23%

125 52%

Bi 125 100% F 1.65 1.03 9.0-lo, Bi 1 iJS —l,0Bi 1.53

®) Neutron numbers and abundances of respective residual nuclei in (y, n) experiments. *) These give an assessment of the goodness of fit of a calculated £a versus £« curve to the

observed data, using the Fermi gas level density formula both without and with pairing corrections.

*) Bremsstrahlung photoneutron mean energies £a for peak bremsstrahlung energy £# — 24 MeV.

*) 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. l * 2

). •) Measurements of £a (£u ) for these nuclei were made only for Eo — 21, 23 and 24 MeV.

418
REF. ELEM. SYM. H.E. Jackson, G.E. Thomas, and K.J. Wetzel

Phys. Rev. C2., 1153 (197*0 Tb 159 65

METHOO REF. NO.

REACTION RESULT

\ EXCITATION ENERGY

SOURCE oetector

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 measure- ment of the cross section relative to the calibration

value, the 90* uranium Inelastic cross section.

9 da/du (elastic) da/dw (Inelastic) Nucleus (deg) (mb/sr) (mb/sr) a*U

(2*. A5 keV) 20 1.72 ±0.17

30 0.97 ±0.12

SO 0.334 ±0.039

60 0.23 ±0.04

70 0.24S ± 0.024 0.136 ±0.015

90 0.182 ±0.017 0.154 ±0.012

120 tJ.189 ±0.017 0.160 ±0.013 ®Th

ISO 0.303 ±0.016 0.160 ±0.015

(2*,4S keV) 90 0.129 ±0.015 0.103 ±0.007 Pb 20 1.28 ±0.12

30 0.S5 ±0.07

SO 0.289 ±0.051

60 0.20 ±0.04

70 0.087 ±0.014

90 0.079 ±0.005

120 0.060 ± 0.004

m*B1

150 0.127 ±0.008

910 keV) ‘“Ta

90 0.101 x 0.0062 -0

(f .136 keV) 90 0.0370 a 0.003 0.006 56 ±0.0015 «»Th if .58 keV)

1*. 138 keV)

90 0.0314 ±0.003 0.0110 =0.0016 0.00511*0.0011

TABLE HI. 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 H. dam (901/dfl ^rSIL/^SJT

(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 0.13±0.04 Pb 0.076 0.079± 0.005 0 B1 0.101 ±0.006 0 -0

Th 0.128 0.129± 0.015 0.91 0.80 = 0.08 U 0.157* 0.182 ±0.017 1.03 0.85 ±0.08

•If the Livermore parameters (Ref. 33) for ***U 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).

FOMM N3S-418

(REV. 7.14.341 USCOMM.QC 2601 0* PQ4

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PH0T0NUCL EAR DATA SHEET 419
H. E. Jackson, G. E. Thomas, K. J. Wetzel ELEM. SYM. A 2 Phys. Rev. Cll , 1664 (1975)

METHOD

j Tb 159 65

I REF. NO.

I 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)

RATIO RAMAN/ ELASTIC

TABLE L Differential cross sections measured for

elastic and inelastic scattering of 11.39- Me V photons.

Stats 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.

9 dtr/du (elastic) da/du (Inelastic)

(deg) (mb/sr) (mb/sr)

««U (Z*. 45 keV)

90 0.169* 0.011 0.173*0.016

150 0.355*0.041 0.236* 0.24 “Th (2*. 45 ksV)

150 #.331* 0.035 0.210*0.022 ‘“Ta tf, 136 keV) (If, 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 “*Ho (f\ 95 keV) Of, 210 ksV)

ISO 0.141*0.014

0.022 * 0.004 0.013*0.004

15*Tb <|\ 58 keV) (j*, 138 keV)

90 0.062 * 0.006 0.024*0.003

0.013*0.003

ISO 0.134* 0.012

0.042 * 0.004 0.019*0.004 lUpr

150 0.030* 0.008 ...

TABLE QL Comparison of calculated and observed

values of the cross sections for elastic scattering and of

die ratio of Raman to elastic scattering by various nuclei

for 11.387-MeV photons at 90 and ISO*. The parameters

used in the calculations for column 5 are given in Table

1L Column 4 describes resalts obtained by perturbing

those parameter to meet the constraint of Eq. (3) (see

text).

- da(9)dQ

(mb/sr)

Target Calc. Exp. —(8)/<*>•_,—J9)

8-150* 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 He 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

(J 0.289 0.355*0.041 0.78 0.73 0.67* 0.07 6-90*

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

I A € V . 7-1 4-64) U3COMM-N65-OC

y.s. oepartmentof commerce

NATIONAL. 0URCAUOP STANOAPOS PHOTONUCLEAR DATA SHEET 420
REF. V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

METHOP

ELEM. SYM. Z

Tb

I REF. NO.

j

! 76 Em 2

159 65

egf

REACTION RESULT excitation

ENERGY

SOURCE oetector

ANGLE TYPE RANGE TYPE RANGE G,F ABY THR-999 c 999 TRK-I 4PI

Table 1 999 3 1 GEV

Measured values of <x, at £=» 1000 MeV and deduced values of <r* assumed constant from £<, to 1000 MeV

PlgTMWt Z

lIA »» (mb)

£o (MeV)

<7t (mb)

Bi 3196 113+0.6 200- 7.6 ±0.6 Pb 3143 5.4 ±0.4 210 3.6 ±02

H 3110 4.1 ±02 230 13 ±0.3 Au 31.68 ' 10±ai5 240 1.4±02

Pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10" 1 Re 30.21 (3.7 ±0.3) x 10'* 280 (29±0.3)x 10* 1 W 29.78 (32 ±02) x 10- 1 290 (13 ±02) x 10- 1 Ta 29.45 (32±0.3)x 10- 1 2-00 (27 ±02) x 10- 1 Hf 29.04 (1.7 ±0.2) x 10- 1 310. (1.4 ±02) x 10-' Yb 2821 (12 ±0.1) x 10- 1 330 (12 ±0.1) x 10” 1 Tm 28.18 (72 ±0.8) x 10* 2 335 "

(5.8 ±02) x 10* 2 Ho 2721 (3.6±0.4)x 10' 1 355 (32 ±0.4) x 10- 2 Dy 26.30 (16±02)x 10* 2 360 (22±02)x 10* 2 Tb 2628 (22±02)x 10- 2 370 (22 ±02) x 10* 2 Gd 26.04 ( 1.6 ±0.2) x 10* 1 330 (1.7 ±02) x 10- 2 Sm 2526 (12±02)x 10* 2 390 ( 1.4 ±02) x 10* 2 Nd 2426 (92 ±0.9) x 10-

405 II ±0.1) xlO* 2 Ce 24.00 (8 ±0.9) x 10* 2 420 (9 ±1 )x 10‘ 2 La 2329 (8.4±0.9)x 10* * 430 (1 ±0.1) x 10" 2 Sb 2126 (12±02)x 10" 2 460 (12 ±0.3) x 10* 2 Te 21.19 (82 ±1 )xl0* 2 465 (12±02)x lO-2 Sa 21.06 (12±02)xlQ-». 465 (1.7 ±02) x 10* 1 Cd 2a49 (1.7 ±02) x 10- 2 470 (12 ±0.4) x 10- 2 Ag 20.47 (2 ±02) x 10- 2 470 (26±0.4)x 10* 2 Zn 13.76 (2 ±0.4) x 10*' 515 (3 ±0.6) x 10"' Cu *2.44 (24 ±02) x 10“ 1 515 (3.6 ±0.8) x 10-

Ni 13.35 (14±0.5)xI0-* 510 (3.6±0.8)x 10* 1 Fe 1110 (3 ±0.6) x 10” 1 -510 (4.4±0.9) x 10” 1

Fig. 2 Nuclear fissilities 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.

7 ); and crosses, the data from (p,f) experi- ments20

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

l;A> 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

). form N3S-418

IR *V. T.I4.MI USCOMM-NBS-OC

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 ax., 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. OEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAPOS PHOTONUCLEAR DATA SHEET 421
B. I. Goryachev, Yu.V. Kuznetsov, V.N. Orlin, N.A. Pzhidaeva, jeuEM. sym. a z V. G. Shevchenko

Yad. Fiz. 23, 1145 (1976)

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

method 1 REF. NO.

j

j 76 Go 4 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE PANGC TYPE RANGE

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

G, 2N ABX 15- 21 C UKN SCI-I 3PT

"

0, mb

FIG. 3. Photoabsorption cross section cT for l3, Tb (hollow and

solid circles). Above the (> . 2n) threshold we have shown by

the triangles the cross section <x„. The thin and thick curves show respectively the fits (cr

t

: Ojl-j- l :2) and?;3 *

(ff,r, :C,r.:ff3 r,1 : 1 : 1).

TABLE 3. Static deformation 0 and intrinsic quadmpole moment Q9

.

haw*t VOTfc OUttr pfeoumudur uuomb

«xauaoa tt of nuclei NadM

( o. b » 0. b %. b

*»n> 039 637['»1 029 6.53*0.6 032 737 7.07 ('M 029 03 (ij “Ho 039 7.01 CM

032 7.73*03 030 7.14 M 730 CM

031 7-6 ("|

'•Er 039 630 CM

030 739*06 031 73 CM

'"HI 020 634*0.6 6-79 1»]

TABLE 6. Integrated cross sections. Naum if, M*V-b «... mb •-* A

4** a— MaV-b

'•MTi ::.n 1.47 210 0241 13.9 141 in-* ‘•He I.C0 131 '.’19 0341 16.1 33‘ ;o-* '“Er 1.36 1.43 III! 0337 10.1 in to-* TABLE 1 Level-density parameters

"Mil 103 130 r.« 0.106 143 4.03- to-'

a. MeV' «. MsV A"NS 1.41*03 0.23*004 1.l l0-'*6 I0-*

Nucleus Present work Other studies Nucleus Present work Other studies *“Tb — 7.7“*' '«Er

' 6.1*2.

3

8

<tii '“Ho 4. 2 *1.3 3. I* 1 ** lT8 H£ 17.7*7.3 -

TABLE 2. Paramstera of fitted curves 9^’

N'adam f.MaV • • mb r Mav C MtV a*., mb r NaV 9f;i r X

• / C . MsV M*V

’Th 1239 152 2.91*009 13.78 3.42*011 238*023 1973 97 104 209

1241 213 331*003 132*3 JS2 3.UUOU7 • .*!&* OS 104 206

"lie 1231 201 2.74*0.11 1023 300 j.UTaO.17 111*037 1700 97 104 20.6

12. C? 2» .Njiro.re !C40 2sa uriso.on 2 2003 96 104 206

'•Er 1232 191 2.71*014 13.59 j.n* sO. 16 118*00-. 1133 94 ta; 203

1230 214 342*0.08 1025 3.09*0 10 - 101.7 93 107 20.6

'•111 1336 ICC 23&* 10 13.03 iS| ii.O**037 4.(1)21.76 1711 99 10.6 20.0 1231 216 332*011 13.46 237 •» 173.7 90 10.6 100 Not*. The lower values of the puameten in each column were found with the requirement :o, r, *2: 1. (over)

-OMM M3S-41S

'•IV. 7. I «.«4> USCOMM-NSS-OC PHOTONUCLEAR DATA SHEET 422

U.S. OEPARTMENTOF COMMERCE

NATIONAL SUnCAUO- STANOAROS
12

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

Eng. transl. in Sov. Mathematic s-Doklady

.

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

16

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

18

E. G. Puller et al., Nucl. Phys. 30 , 613 (1962).

19

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

20

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

21

0. V. Bogdankevich et al., Zh. Eksp.Teor.Fiz. 42_,

1502 (1962); Sov. Phys. JETP 15, 1044 (1962).

22

B.S. Dzhelepov in Struktura slozhynkh yader

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

423
REF.

METHOD

ELEM. STM. A z A. Suzuki and K. Shoda

Nucl. Phys. A260, 172 (1976)

Tb 159 65

REF. NO. 76 Su 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPC PANGS TYPC PANGS

E,P ABX 11- 18 D 15- 18 MAG-D 125

Proton yields obtained by summing protons with energies above levels given in tables.

,s3 Tb(e.ep)

9.125.3*

Fig. 2. Cross section ofthe ***Tb(e,e'p) reactions. The solid com sad tbs dished arrows

are the cross sections and the IAR position obtained by the best fitting to the data with eq.

(25). Solid arrows is the position ofIAS estimated with eq. (20). G-IAJS means the IAS of the ground state and the indicated figures are spinparity and quantum numbers for the corre- sponding resonances.

Tablx 1 Parameters of the present experiment

Target Atomic

number

Purity

CO

Thickness (mg/cm1

)

Lowest proton

energy (MeV)

Bin size (keV)

Range of measurement (MeV)

,4«Tb 65 99.9 (natural) 14.87

• 4.70 100 15.0 -17.5

‘•4Ho 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 *’*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

Tabu 3

Displacement energies obtained from the present data and the estimates with eqs. (20) and (21) Target Resonance £• St («P) E*m) S.(3 - 0.3)*) (MeV) (MeV) (MeV) (MeV)

l **Tb 1st I5.75±0.15 15.58 2nd 16.06 15.93 16.50±0.15 15.46 w*Hd 1st 16.15±0.14 15.64 16J8 16.25 ‘"Tm 1st 15.76±0.13 16.20 2nd 16.76 16.63 16.34±0.I4 16.22

1T *Lu 1st 16.44±0.13 16.75 2nd 17.07 16.93 17.45±0.15 16.35 *«Ta 1st 17.31 ±0.15 16.40 17.38 17.24

*) Estimated with eq. (20). *) Estimated with eq. (21). Table 4

Deformation parameters of IAS <3|A* derived from the (c. t‘p) result

Target Resonance IAS Parent

state *ua-V>

(assumed)

<W)

11Tb 1st *- P211 ground —0.008 0.31 0.30 2nd 1-13121 875 keV —0.016 0.29 ***Ho 1st ft«331 ground —0.023 0.30 0.28

l *Tm 1st *“[321] ground -0.018 0.29 0.27

' 2nd J- 13101 565 keV —0.019 0.27 »t$Lu 1st J-I314] ground —0.010 0.28 0.27 2nd 1"13031 1420 keV —0.029 0.25 **‘Ta 1st 1-15031 670 keV —0.046 0.26 021

The assumed deformation parameters for the parent states <), are also shown.

*) The errors are about ±0.01. 424

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUR CAU OF STANOAROS
rer.

METHOO

T. Bar-Noy and R. Moreh

Nucl. Phys. A275, 151 (1977)

Tb

ref. ho.

159 65

77 Ba 7 egf

\ RCACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ancle

TY»I RANG*

G,G ABX CD1 ro 0 8- 12 SCD-D DST

•

Abstract: Ditferential cross sections for elastic and inelastic Raman scattering from the deformed heavy

nuclei : 5 “Tb. 1S5 Ho and Ji7 N'p were measured at five energies between 8.3 and 11.4 MeV. Angular

distributions at four ar.idcs between 90" and 140’ for both elastic and inelastic scattering at 9.0 and

11.4 *

! ;V were also measured. The monoenergctic photons were obtained from thermal neutron

c ipte-.- in Ni ar. l Cr. All the angular distributions and the clastic and Ramin scattering at the higher energies ere in good overall agreement with theoretical predictions. The theory is based on a modifier- simple rotator model of the giant dipole resonance in which the efTect ofDelbrud: scattering was included. A trend of both the clastic and Raman scattering at lower energies to be stronger than expected ere 'uggisted by the data. However, theratio be. ween the Raman and elastic scattering seem to be in good agreement with theory throughout the whole energy range. This shows thar there

is no need to introduce a direct nonresorint component to the imaginary part of the clastic scattermg amplitude to explain the experimental data.

Fig. 5. Elastic ar.d Raman inelastic differential scattering cross sections from l5*Tb at 140'. In the solid and dashed lines, the nuclear resonance amplitudes were obtained using parameters extracted from fits made to the Livermore and Saday measurements respectively. (See text, table 3 and caption to fig. 3.)

oyer

rom* N8S-41S

<R*V. 7. 1 *.441 UICOM*M(MC PHOTOHUCLEAR DATA SHEET 425

U.S. DEPARTMENT OF COMMERCE

NATIONAL BURCAUOF STANDARDS
RATIO

ENERGY (MeV)

Fig. 6. Ratios of Raman/eiastic scattering cross sections at 140' for 2STNp, “’Ho and ,5*Tb targets. Here, R, and Rj refer to the first and second Raman lines. In the solid and dashed tines, the nuclear resonance amplitudes were obtained using parameters extracted from fits made to the Livermore and

Saday measurements respectively. (See text, table 3 and caption to fig. 3.)

426
J.J. Murphy II, H.J. Gehrhardt and D.M. Skopik

Nucl . Phys. A277 , 69 (1977)

CLEM. SYM. A Z

MCTHOO

Tb

no. 159 65

77 Mu 3 egf

REACTION RESUL T excitation

ENERGY

SOURCE _ OETECTOR

angle

TY»« HANS

C

E,A ABX 12-100 0 100 MAG-D 50

Fig. 1. The a-partii.'e energy spectra at 50* in the Lib for the si* nuclei studied. Note that as Z increases. the cross section decreases and the energy of the prat increo..es. Errors are statistical. Curves

are to guide the eye.

ro«M N8S-41C

IREV. M4.MI

uscoMKM«as-oc

Fig. 2. Energy ofthe cross section peak as a function of Z. The solid line is the energy of the classical Coulomb barrier. 427

OERARTMCNTOF COMMERCE

>NAL lURUUOr ST AN OA ROS
REF. J.J. Murphy, II, D.M. Skopik, J. Asal, and J. Uegakl

Phys. Rev. C 18^, 736 (1978)

ELEM. SYM.

Tb 159 65

METHOCI REF. NO.

78 Mu 9 M.

REACTION RESULT excitation

ENERGY

SOURci •* oetector

angle

TYPE RANGE TYPE RANGE

E,A ABX 5-100 D 100 MAG-0 DST

a psitides from the dectrodisintegration of seven nuclei with Z between 29 and 79 have been observed. Energy spectra at 50* in the laboratory for six nuclei and angular distphtions for five nuclei are reported. The croaa 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 tor 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 «.««> USC OMM-N B5*0 C

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.

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. ’ over

IT OF COMMERCE

NATIONAL BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 428
(nb/MeV

u)

IlG. 6. Angular distributions for tsrblum. Th* commoots* mads for Fig. 5 apply horo.

429
A. Jarund, K.R. Lindgren, B. Forkman

j. Inorg. Nucl. Chetn. 43, 1725 (1981 )

CLEM. SYM.

Tb 159 65

method REE. NO.

81 Ja 1 hg

REACTION RESULT EXCITATION ENEROY

SOURCE - OETECTOR

ancle TYPE RANOK TV PC RANGE

G.NA24 - ABY THR-800 C 400-800 ACT14PI

Abstract—The cross section for photoproduction of : *Na from IJ*Tb has been measured in the energy range 400-400 MeV. The present experimental cross section together with earlier measured ones are compared to

calculations where ;*Na is produced in a binary fission process.

Fig. 1. Measured yields in cross section per equivalent quantum

for production of MNa from '’’Tb as a function of maximum

bremsstrahlung energy. Fig. 2. Experimental mean cross sections as a function of target mass number. Open and filled circles are old and new data

respectively. The curve is calculated as described in text.

*««m H&S-4IS

l»tv. T.lfcWI U SC OKU.•oc i«oto-a«4 PHOTONUCkEAR OATA SHEET 430

U.s. OEPARTMENTOF COmm&PC- NATIONAL SURC&U O w ST-MOAHSS
Dy

DYSPROSIUM

Z=66

Lecoq de Boisbaudran separated what was called holmia into

two earths; he called these holmia and dysprosia. The name dysprosium comes from the Greek dyprositos meaning "hard to

get at".

431

Dy
432
3..G, Batear K.G. Mciicili

Car.. J. Phys. ^2, 1158 (1561}

method

Betatron; fast neutron yield, angular distribution; Si threshold j ^ detector; ion chamber i 6i Ba 2 i >»7

3

i REACTION RESULT

OETECTOR

ENERGY A-iGi-e

1 TYM RAN SE TTRB manse G.XN ABY THR-22 C 22 THE- 1 5-+ DST

-

j

I

i In Table 4:

c - average cross section cf detector

weighted with neutron spectrum

3 a neutrons/lOO roentgen/mole a

W(6) * a )' [1 t Aj, P (cos o)

.

n=l

TABLE !V

ifi ft wi

111 «» IV

a* (c*)X10M

Vi

*uJ(2S ttts Vi! ,X1C'

W? dlmit 245i'1=0.06) 0.01*0.08 -0.00*0.10 - O' V . - 0.12

” r).-uuRi 1041;i*o.o3) 0.04*0.04 -0.05*0.05 4.05 0. !7 0.10

3081(1*0.02) 0.07*0.03 -0.00*0.04 7.0; 9 25 0.12

l\>.* 2001U±0.03) 0.05*0.04 -0.17*0.05 4.9 s 0.18 O.U

• • V ; 3901(1*0.02) 0.08*0.03 -0.22*0.04 9. C.i C.2C 0.15

a-*:;-

kei 1451(1*0.05) 0.07*0.07 -0.23*0.09 3.5S 0.12 0.12

3471[1*0.02) 0.05*0.03 -0.29*0.04 8.57 0.30 0.12

.-.rser.;. 4S2I 1*0.03) 0.11*0.04 -0.24*0.05 11.91 0.33. 0.15

’.libidi-.* 6331(1*0.05) 0.13*0.00 -0.14*0.08 if. 76

4091[1*0.05) 0.10*0.06 -0.17*0.08 10.10

/i.riufr. 2901 1*0.10) 0.03*0.12 -0.12*0.15 7.16

»sr 5901(1*0.04) 0.10*0.06 -0.22*0.08 14.57 0.87 0.07

rr^ 9051 1*0.02) 0.02*0.02 -0.26*0.03 22.35

• fi- 11331(1*0.03) 0.04*0.04 -0.29*0.05 27.99 1.42 0.08

' .^o 10481 1*0.04) 0.10*0.00 -0.38*0.08 25.89

15951 1*0.02) 0.02*0.03 —0.42*0.04 39.40 1.04 0.15

1310 ((1*0.05) 0.05*0.00 -0.39*0.08 32.50 D> bprc,v.iir.j 1052 ((l*O.OS) 0.04*0. 10 -0.34*0.13 40.80

Ta« .

* :*• 1558<(1*0.02) 0.04*0.03 -0.22*0.04 38.48 2.50 0.00

1305 ((1*0.02) -0.07*0.03 -0.24*0.04 33.71

. c/c. ./ 1345 < 1*0.02) 0.04*0.03 -0.31*0.04 33.22

» >:C • 2274 ((l*0.01) 0.02*0.02 -0.42*0.03 56.17 2.72 0.08

2162 1*0.02) 0.05*0.03 -0.45*0.04 53.4(7 2.3& 0.06

rhcriui.i 3031 ((1*0.04) 0.00*0.05 -0.32*0.07 74.87

J.~aruim 4630 1*0.02) 0.05*0.03 -0.17*0.04 114.36 •>*> . 2.4V A CF n mUlIbOT-usMw. Errors tn stsodard errors disa to counting statistics miy.

- rA PHOTONUCLEARDATA SHEET 433

UJ. DEPARTMENT OF COMMERCE

NATIONAL SURCAlJOr JTA.-iOAROS
Atomic Number A

Fig. 15. Ratio a*Ja, versus atomic number A. Here is the level density parameter taken from

the neutron resonance work of refs. *•*), 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.

form N3S-418

IRIV. 7*1 4.441 use omm.oc asoia.p«4

(over)

U.S. OEPARTMCNT OF COMMERCE

NATIONAL. BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 434
Table 3 (continued)

Target IV

(residual nucleus) *)

Goodness

of At *) no with

p.c. p.c.

£.(24) T

(MeV)«) (MeV) 4

)

Of (MeV- 1 )*) (MeV-*)0

Ba 75 1% F 1.16 16.5-l34Ba 15J9-l3*Ba 0.93 77 2%

78 7%

79 8*/. 80 11%

81 71%

La 80 100% F F 1.25 0.72 15.5-,3,La 13.76-,3*La 0.89 Ce 81 89% F G 1.24 0.70 !7.0-‘ 3,Ce 17.3 -,4, Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-“°Pr 17.05-l4,Pr 1.00 Tb«) 93 100% 1.15 19.3-‘ 3 *Tb 2I.85-,40Tb 1.14 Dy») 93 2% 1.06 20.9-‘4, * s Dy 21^ -“3 Dy 1.05 94 19%

95 25%

96 25%

97 28%

Ho 97 100% P G 1.06 0.56 21.4-“4Ho 20.66-l44Ho 0.97 Er«) 95 2% 1.11 19.2-“*Er 21.9 -‘“Er 1.14 97 33%

98 23%

99 27%

101 13%

Tm») 99 100% 1.03 24.0-t4,Tm 22.58-* TOTm 0.94 Ta 107 100% G 1.00 0.49 26.0-l,oTa 2U -l,lTa 0.82 W 107 26% G F 0.98 0.50- 27.0-l,3W 23.0 -l43W 0.85

108 14%

109 31%

111 28%

Au 117 100% G 1.19 17.5- lMAu 20.24-***Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-30*Pb 10.1 -J0T Pb IJ5

(

2

- 82) 124 23%

125 32%

Bi 125 100% F 1.65 1.03 9.0-30,Bi 13J -3l0BI 1.53

*) Neutron numbers and abundances of respective residual nuclei in (y, n) experiments.

*) These give an assessment of the goodness of fit of a calculated £« versus £o curse to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

*) Bremsstrahlung photoneutron mean energies £. for peak bremsstrahlung energy £« » 24 MeV.

*) Nuclear temperature from At 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-reso nance absorption from refs. *•*).

*) Measurements of £.(£«) for these nuclei were made only for £» • 21, 23 and 24 MeV.

435
REF.

V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

EL EM. SYM.

Dy 66

METHOP REF. NO. 76 Em 2 egf

REACTION result excitation

ENERGY

SOURCE OET ECTOR

ANGLE

TYRE RANGE TYPE range

c;.p ABY THR-999 c 999 TRK-I 4PI

•

Measured values ofe, at £

Table I

> 1000 MeV and deduced values of ek assumed constant from £o to 1000 MeV

999 * 1 GEV

Element Z

liA

(mb) (MeV) (mb)

Bi • 3196 113 ±0.6 200 7.6 ±0.6 Pb 3145 5.4 ±0.4 220 3.6 ±01

n 3110 4.1 ±01 230 18 ±01

Au 31.68 io±ai5 240 1.4 ±01

Pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10" 1 Re 30-21 (3.7 ±01) x 10-

280 (19 ±01) x 10*' W 29.78 (31±<X3)x 10" 290 (18 ±01) x IO*' Ta 29.45 (31 ±0.3) x 10-

300 (17 ±01) x IO"' Hf 29.04 ( 1.7 ±01) x 10" 1 310 (1.4±0Uxl0-‘

Yb 28.31 (11 ±0.1) x io- 1 330 ( 11 ±0.1) x IO - ' Tm 28.18 (71±0.8)xl0- 2 335 (6.8 ±01) x IO' 2 Ho 2711 (3.6 ±0.4) x 10" 2 355 (31 ±0.4) x IO" 2 Dy 26.80 (16 ±01) x 10- 2 360 (21 ±01) x IO

-

2

Tfe 2618 (15 ±01) x IO" 2 370 (21 ±01) x 10* 2 Gd 26.04 ( 1.6 ±01) x 10- 2 380 ( 1.7 ±01) x 10* 2 Sm 2516 ( 11 ±01) x 10" 2 390 (1.4±01) x 10“ 2 Nd 24.96 (91 ±09) x IO

- * 405 (1 ±0.1) x 10" 2 Ce 24.00 (8 ±0.9) x IO-1 420 (9 ±1 ) x 10-2 U 2319 (8.4±0.9)x 10"* 430 (1 ±0.1) xlO"

Sb 2116 (ll±01)x t0* 2 460 ( 11 ±01) x 10* 2 Te 21.19 (81 ±1 )x 10” 2 465 (11±01) x IO* 2 Sn 21.06 ( 11 ±01) x IO' 2 465 <1.7±01)x IO* 2 Cd 20.49 ( 1.7 ±01) x IO

-

2

470 (21 ±0.4) x IO -

2

Ag 20.47 (2 ±01) x 10* 2 470 12.6 ±0.4) x 10* 2 Zn 13.76 (2 ±0.4) x 10" 1 515 (3 ±0.6) x 10"

Cu 13.44 (14±0.5)x IO

- ' 515 (3.6±01) x 10“' Ni 13.35 (14 ±01) x IO

- ' 510 (3.6 ±0.8) x 10“

Fe 1110 (3 ±0.6) x 10* 1 510 (4.4 ±0.9) x 10*'

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)

.

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.

Fig. 2. 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) expert* menu20

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

l/A > 26. The dashed curve is the curve VI calculated by Nix and Sassi' 2

). Z>

rom, NSS*4IS

'"IV. 7-lt.MI USCOMM-NBS-OC

U.S. (DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANOAROS PHOTONUCLEAR DATA SHEET 436
.

. Mum

'

9.

Dy

A=162
.

.

.

Iff.. .

Bj BS ' H I -,.

' I H I 1

-

•

.

.

•

•• •

-

;. 1 *’! - *’ I Ml

'

438
J.J. Murphy, II, D.M. Skopik, J. Asai, and J. Uegaki

Phys. Rev. C 18, 736 (1978)

EL EM. SYM.

Dy

A

162 66

method REF. NO.

78 Mu 9 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

E,A ABX 8-100 D 100 MAG-0 50

a perricift Grom the dectrodisintegratian of seven nuclei with Z between 29 end 79 have been observed. Energy spectra at 50* in the laboratory for six nuclei and angular distribtions for live 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 highen energies measured become increasingly forward- paaked suggesting a direct-reaction process.

FIG. 2. The a -particle energy spectra at SO* 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)

foam N3S-418

leev. 7.1 4-wi USC OMM-N BS-OC

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. I.

z

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.

PHOTONUCLEAR DATA SHEET 439

r of commerce

NATIONAL BUREAU OP STANOAROS
.

440
1 ' I Dy

A=1 63

.

..

.

'

Dy

A=1 63

1 441

.

*

Dy

A=1 63
442
K . N . Geller, J. Halpern, and E. G.

Phys. Rev. 118 , 1302-12 (i960)

METHOO

Muirhead

c.*. J '

Dy 1 63

REF. NO.

-C

Betatron; neutron threshold; ion chamber 60 Ge 3 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ancle

TVP* HANOI

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

THRESHOLD

Tabu L Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted from mass data and reaction energies. Alt energies are expressed in the center-of-mass system in Mev.

Kmctlon No. runs Present results Other results Method Reference

DyWfV^jDy* 1 6.32 ±0.11 6.27 ±0.06 mass data 3

« W. H. Johnaoa. Jr.. and V. B. Bhanot, Phya. Rev. 107. 6 (19S7).

r ONM N8S-4I*

RftV. 7.1 4.441 "1COI*kUC J«OIO-»«4 PHOTONUCLEAR OaTA SHEET 443

U.S. O 6PARTM 0 N r f . COMMERCE

NATIONAL BUREAU '• ST ANQ4 RQS

Ho

A=165

HOLMim

Z=67

Holmium and its compounds are used for research purposes

with their limited appl ications based primarily upon their

distinctive electronic and magnetic properties. -The element

is of great interest to nuclear spectroscopists because

there is only one naturally occuring isotope and it has one

of the highest nuclear moments of the rare earth series. ,,Ho

A=1 65

445

Ho

. A=1 65
'

;

446
j.G. Ciidley,

Zan. J. Phys.

Betatron

L. Katz, S. Kowalski

407 (1958)

EL EM. SYM.

Ho

REF. NO.

A

58 Ch 2

c7

NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ANCLE

TYPC HANSK

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

See 58 Ka 1 for cross sections

MEASURES PHOTONEUTaON TItRESUOLDS

1 HHI

Measured Other Q values. React ion Q value, Mcv. Mcv. Method Rc/erence

TABLE I THRESHOLD

Ho«*(y, »)HolM S.lOdsO.05

'-3S-41E

’ • «<MI

U.S. OEPAflTMENT CCV - J n a non ac a u "» e * .

.. PHOTONwCL *:#«*« Sm«cT 447
'

FuLler, B. Petree, M.S. Weiss

’hys. Rev. 112 . 55^ (1958)

ELEM. SYM. A

Ho 165 67

Betatron; ion chamber

REF. NO.

58 Fu 1 NVB

reaction RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPI HANOI

G, XN ABX 7-hO C 7-h0 BF3-I h?l

CF DAN^S THEORY

Table L Target properties and results.

Element Form iuad Sn Sn

I I La La

Ce Ce Sm 5m«Ot Tb Tb«0t Ho HotO* Er Er*Q» Yb YbiO, Ta Ta

Au Au

Pb Pb

Weight «*(v.»>* grams harns

4.81 0.30

8.55 0-36

10.43 0-34

4.99 0.45 2.90 0.26

3.04 0-39

1.87 0.41

5.41 0-S0

3.57 0.50

8.41 0.49

3.16 0.68 8.0S 0.75

SrdE>

0.064 5.0 0.085 6.0 0.063 52

0.080 4.5

. 0.073 8.6 0.087 8.7 0.079 7.5 0.100 8.5 0.090 7.0 0.077 6.0 0.085 4.2 0.081 3.8

Fig. 6. Mean energy and width of giant resonances. "£*” 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.

.. wmiu. and "r* th« fall width at «*(y.«)/2

Tabu IL Energies of resonances in deformed nuclei.*

Em

Nucleus M«v

0* ^*

burns Method Mcv

E> Mev

£i/«* £i/i* Mer Mev

«Tb*-

nilo“» «Er«

uEr*1 MTa«* i»Ts» nAu*»

14.7

14.3 14J HJ

14.1

14.1 13.6

4. 9»

7.1* 21*

7.3* 12.4* M*

3.75*

CE

CE

SCCE

SCCE

SC

11.9 IIJ

8.3 11.6

10.3 11.9 12J

16.2 16.0

17_S 15.9 13.9

13.2

14.1

10.6 11.0

1 1

J

113 UJ

11-J Hi

t 9.3

13-5 20.0

20.0

17J

17J

16.2

• CE—Coulomb rxdtAtlon. SC »o«ctro«coplc i Si/**. 2Iu**^"«r«tss at vbleh- slant rtMRaact droo* to half Its maximum value. .. ,*

• AdUt^S^ Huua. Mottelaon. and Winther. Revs. Modem Phya. 2S. ^M.’u'pooi and D. N. Kundu. Chart of Alamit Satlti (Longa College Book Company. Columbus. 1935).

Fio. 5. Relative photoneutron production cross sections for tin, iodine, samarium, holmium, erbium, and lead. The points and smooth curves represent tne integral neutron-production cross section defined by Ji*ar,(.E)dE, where <rT*(.E)’-a(y,n)+2*(j,2n)+a(i,pt‘

=f.Je(fr3»)-H .... The scales are normalized to give approximately the same total neutron yield at 40 Mev. The errors indicated were obtained by propagating the statistical uncertainties, (V*), in the original activation curve data through the integral cross section (Tu- trix. Solid histograms represent first differences of integral cross section curves. Dashed histograms show result of correcting for neutron multiplicity above the (tJm) threshold.

-411

41 U.S. OEPAHTMCNTOF COMMENCE

NATION As. •UNCAvjO? 1T4nC5-*- ' • PHCT'-'i ••ATA SH2ET 448
dw £M. i r M.

M6THOO

L. Katz, G.B. Chidley

Nuclear Reactions ac Low and Medium Energies (Academy of Science,

USSR: 1958) 371

Betatron; neutron cross section; BF, counters; ion chamber monitor

Ho

REF. NO. 58 Ka 1

165 c7

NVB

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANCLE

TYPE RANOE

G,XN ABX 9-22 C 9-22 BF3-I +?I

TaSzaaa 2 Uopoau ucnycKOMU* <pomQH*&mp*noe

KaoToa Bn. Mm Mm H30Ton Bn. Mm Bm. Mm

VSI '11.16 20.5 L^o 8.81 16.1 Mn» 10.14 19.2 : pr m 9.46 17.6 Co58 10.44 18.6 Tb‘*» 8.16 14.8 As7* 10,24 18.1 Hots* 8.10 14.6 yso 11.82 20,7 TmlM 8.00 14.7 Nb8* 8.86 17.1 : LulTS 7.77 14.2 Rh18* 9.46 16.8 . Ta‘Si 7,66 13.8 ji» 9.14 16,2

1 All 187 • 7,96 13.3 CsU* 9.11 16.5 Bi203 7.43 144 THRESHOLDS

ho npuueiWHU, nocKOJitKy ohm npeuuurawT 22 Mm do dcox c-ayna/::;, wposie

aojroTa, jua Koiopox'o 5^=21 Mm. CoofiCTua ccMewiu «c(

7

) cdcaohu s Ta6a. 3. TaSanaa 1 Hmtm

1 *niN> **•• •« (£7). Sap

:r, mm r*. Mm* Saph

T(22).

10* NaEmpoN/lOO p*At04P

v« 18.4 0.062 54 • 0.33 1.62 Ma** 20,2 0.060 7.0 0.39 2.01 Co*8 18.3 0.068 6.3 0,44 2,30 As7* 16.4 0.090 94 0,74 445

ym 17.1 0,172 54 0.93 .5.33 Nb« 18.0 O.lSv 74 1.17 6,80 Rb> 17.5 0.160 9.4 1.4C 8.28 jin 154 0.273 6.8 1.76 11,9 Csisa 164 0438 7.7 1,59 10.7 La1** 154 0.325 3.8 145 114

PfHX 15.0 0.320

• 4.9 1.93 13.1 Tb»» 15,6 0474 9.8 2,49 18.1 Ho1** 134 0.305 8.9 242 18.7 Tax1** 16.4 0450 8.4 1.91 14,9 Lu17* 16.0 0425 8.4 1.90 23,0 Ta»« 14

4

0480 8.5 3.15 22,0 Au'*7 13,8' 0.475 4,7 3.04 22,6 Bi«* 134: 0,455 5.9 2,89 234

YfCl}‘/Oi

- -- -VI N8S-4U

PlIOTCi-JoCLEAR DATA SMcuT

u.s. department of COMMERCE

NATIONAL. SUNCAUOr «T»NOi=OS

449
\. ... Geller. J. Ha I pern, and E. G. Muirhead

Phys. Rev. _118, 1302-12 (i960)

: CL EM. $ YM. : A

Ho 165 67

METHOD

Betatron; neutron threshold; Ion chamber

REF. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

angle

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

THRESHOLD

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 are expressed in the ccnter-of-raasa system in Mev.

Kmctinn No. rune Present results Other results Method Reference

1 3.16 ±0.08 8.10 ±0.05 threshold f

•m N8S-41I M4.

M.f<* • • n*

PS*tO I CnwCte Dm » M Sr. w*. I 450

u.i. oePARTMCNror commerce

NAriONAI «MJ«* or 5TA. w'**OI
Ref. H.H. Thies, B.M. Spicer Elem. Sym. A z Australian J. Phys. 1^, 505 (i960)

Ho 165 67

Method Mev electron synchrotron; radioactivity; BF counters; ion

chamber ^

Ref. No.60 Th 1 EH .

Reaction

Ho

1 ^5 (Y.n)

E or AE

8-18

(7d E J *

12.1±0.2

16 . 2±0.2

Notes

<j = 420 mb max

a = 510 mb max

Fig. 7.—Total neutron production cron section for ***Ho.

e >0 is is is INCUS* I MSV

I

Fig. 9.-—Cross section for photon absorption in l,1Ho. The

correction for neutron multiplicity is applied using statistical theory. Table 2

HI ANT RESONANCE PARAMETERS IN nKPORMKD NUCLEI

Nucleus lMTb l **Ho l,lTa

Reference Fuller and

Weiss (1938) Present Paper Present Paper

Fuller and

Weiss (1353)

Spicer rt at. (1958)

rti.it. (iioV) r.-3 #.7=0*3 7=0-5 #• 2=0-2 6-

1

Ex (McV) 12-3 12-4=0*2 12- 1 =0-2 12 45 120

(mlmm) 200 410 420 308 500 T; (McV) 2-4 3-3 2-8 2-3 2-0 E. (McV) 10*3 l«-0±0-2 16*2=0.2 15-45 13-3

(®i)max. (mbnm) 310 4 CO 510 348 450

I'j (MoV) 4-0 4*3 4-7 4-4 4-0

I.JIX

.

.

2-0 2*0 20 2-10 1-8 E.!EX .. 1*30 l -23 ±0*03 I.34 ±0-03 1-25 = 0-01 1-21=0- 03

form NBS-418

<••1-631 USCOMM-OC 1SS96-PS3 PHOTONUCLEAR DATA SHEET 451

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
Ref. LI. Helah, D«J«

Ftqre* In. 121, 880 (1961)

Elem. Sym.

Ho 165 67

Method ?*• ; KtlvtCln

Ref. No. 61 He 1 JHB

Reaction E or &E a d E J * Notes

Ifrenirn—nr of ^5-kev x-ray from

K- capture in Ho1 ^.

0oca la Table ZZ (milltbarue), Fig. 5 , V tta«h. 7-91 * 8-'*

(T.») 7. 91-10. ^3

Fig. 5. Cross section vs energy, Ho‘H(7,n)Ho“4 (34 min).

Table IL Summary ai mcuurad cna sections.

y-r»y source Co Ft \Ener©r (Mcv)

Reaction\ *.W 7.64

.U

7.73

Cu

7.91

CT

8.36

Si

8.907

Fe

930

Cr

9.72

Fe N

10.16 10.83 0*0.05 0.5 dil 4.8® 1.6 14*5 32*16 44® 15 83®33 120®48

Au**, ^.oiAu1H 0*2 34*17 44® 11 64®j0 SO*30 Ho*“(yAiHo‘“ 0*0.1 39*13 46® 21 i6®jl 360*93

NV*f-,,.iNb« 0.WM®0U05 I.0®0.4 2.4®0.7 9®4U 4.4® 1.5 32*16 23* 7.3

U.S. DEPARTMENT OF COMMERCE

NATIONAL 3URCAU OF STANOAROS

FORM N8S-41S VISCOMM-OC t BB8B-F63 PHOTONUCLEAR DATA SHEET 452
Ref. E.G. Fuller, E. Hayward

Nuclear Phys. ^0, 613 (1962)

[Erratum: Nuclear Phys. 176 (1962)]

Elem. Sym.

Ho

Ref. No. 62 Fu 3

165 67

Method 50 MeV Betatron; BF^, Nal counters

JHH

Reaction

Ho 165(Y,xn)

E or /±E s

(7d E J

if Notes SiS

8-23.5 12.2±0.2

16.0±0.5

2.33 MeV

I4..5 MeV

.23-5

J = 3.20+15#

8

c (12.2 MeV) = 318 tab a (16 MeV) = 328 mb

Ho

165

(y,y)

Correction for neutron multiplicity.

WtMMtCurrnMaStMMaiMMlWMUtrffHM ftKManrfHIMwBrtlWLeTSM uw m*mm W PUUMM m Jl« mm. t, . 11: MeV f, • ; 23 'UV V . Hi mx

f. • I* JfaV. MM r, « *i u*v rh« MM CAMS* urirt l< VUV .. 4 .«n

Intrinsic nuclear quadrupole moment = 7.6±1.1 b. Analysis of scattering

data indicates large tensor polarizability.

NB -A re-evaluated cross section

curve is given in 65 Am 1.

Fif. 7. The tensor scattering cross section for two and three resonance models. The absorov.or.

cross section for these resonance parameters are compared with the holmiua absorption -toss

section in fig. 9 .

Fig. 0. The differential scattering cross sections for hnimium and erbium measured at The

indicated uncertainties are only statistical. The lower smooth curve was calculated using eq. |D» from a curve drawn through the data points o» tig. 4. l'l»e shaded region cnrrc-.p»»nds to rile limits

•f the scalar scattering cross section faulting from tin? limits of the absorption cross section given bv the -haded r»*gi**u <d lig. 4.

Davydov and Fillippov “) the three resonance enercies corres]x.mcl to a value o

y

of about 203

. The values of this parameter normally a.— isneil to nuclei in rlu> part of the periodic table on the basis of their low lvinjf -tates j s only about In'. _J I : form NBS-418

(•-l-«3» USCOMM-OC 1S35«-P«3 PHOTONUCLEAR DATA SHEET 453

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
(J.C. Reinhardt. K'. D. Whitehead

Nuclear Fhys. rc , :Ij1 (1962)

{ Elea. Sym.

Ho 165

=5 ylcV betatron; synchrotron; Siad (n,p)Al28 activity; Cu63(7,n)Cu^

67

EGF

Ho

l65

(Y,n)

Ho

Fieure 8: Dotted curve is of form

a + a ”cos 0 + a cos20 + a cos 0

O 1 2 <=

are statistical errors in counting

only.

En 2 5 MeV

Table - Parameters oi the tit l) for the expression* -i, —ut Co* 0 — a, cosi#

). a — — r cos n ir. .4,-.I.P. -.^P.

45 90 139 9

Fig 8 Anfnl.tr distribution of Ut neutrons from hoinuum.

See fi*. *.

Dili! iiit2) Pr Au V —

** 1 .00—0.0* l.nOjH "2 l. oo—ii »»2 1 .***»— •* **2 l.UO —•* o3 t I,.*-.. Hi

*1 0.13—0.03 0. IS—0.04 0. 1? —0.1*4 * 14—*».i*3 •>. 17 = *» ihi o.l2 •* 14—•***;! 0.4? —e.06 U4UrsO.uA 0.41—0 oft ».Sl ii».«7 **13-0.11 o i

m

• 2ft— o. mi •Us-ti.iM o.2i — •» *.*3 0.30 —o 03 • 13 — w 04 •). 1* — *> <)•»• 0.14—0.04

-•!.*) 0.37— <*.V5 o.3l— ft.**** 0.32 -o oT *. i 3 —* » o3 • * 1 1 —•• •*> i».3'l— •• o3 0.30 —•• "4 4 0.33— »*ud o r»u— ft Os 0.39-0 <**> * 7ft— •• **7 o.a3—o.ll o iiti — ftu O »*L —•' "0

6 0.4? —*>.06 ft 4O—0.U8 0.41 —0.00 *21—o.*>7 0.13—0 LI ii 2*^o oft '* 39 — o.oii 4 0.13—0.1*3 * *M 0.17 -0.04 #.l4—6.o3 0. 17—o.oti 0 12 — •» **3 O.U — o *i.T

•) Renormalized so chat .4, • 1

T.viL* * Parameters o the tit i3) for the expressions a, —

a

t co» 6 — a, co» *0 — a, cos *0. i— i». -

Uii21 L-r Au V -

l.lll —*M»2 l.UO— >).<>•» I,..: =

>. >>3 0.98—0 02 l.ui*—

«

m»3 l.o*#— 0.1*2 1.1*1 —o.02 H.VJ-vM 0.17 —0.0? 0.31 i«» "7 0.o7— o.iH* o. l»»— o.oe .i 12 o3 o.l7 — o.*#3 0.36 -Oil 0 3T =i|. U Iu 0.03—O.12 o. 13 —o. no 0.23-0.12 0.47-** II —<». IT~«». t» o.o3— 0.24 —0.17 s-o 33 0.31— 0.19 o « *.1—0.32 o o3 — ft. 1ft -0.17 -*• 17 0 H—o.13 0.23-0.18 0.13—0 30 0 27-0.13 u.2l»—0.23 o.l3—«* 14 0.**9 — •# 13 —i.* 0.43— o.*rj .1 3a—«.U 0.3ft— o 12 0.03 — O.oa *#.**9— o.l4 0.21 ~ •* oft • * 27 —o.ii’.i —o od—o.**9 O oi —o.ll —0 OA—•* 13 0.13— *#.08 •» '*2 -0.1'J o.ol -ft. OS — OA —•».!*»

4

) Rcaorraauzcd «o chat A %

-m l UJ. ocpartmemt OF commerce

7<3AM K3S-418 NATIONAL IURCAU OP JTANOAAO*

(•°f«33) LSCOmm*OC 1€389«**9* PHOTONUCLEAR DATA SHEET 454
PHOTONUCLEAR DATA SHEET 455
36F. M. Langevin, J.M. Loiseaux

J. de Physique 24, 1027 (1963) Ho 165 67

METHOD rer. no. Betatron; photon scattering 63 La 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

tyre ranee G,G ABX 9-26 c 9-27 NAI-D DST

In figure 4, W(0) = 1 + a(cos 9 )

FORM NBV41S

(NKV. 7*1 4*441 U1COMM.QC PHOTONUCLEAR DATA SHEET 456

U.3. DEPARTMENT OF commerce

NATIONAL 4UNKAU OF ITANOANOI
***• P.A.Tipler, P.Axel, N.Stein, D.C. Sutton

Phys.Rev. 12%, 2096 (1963)

Elem. Sym,

Ho

Ref. No. 63Til

165 67

Method25 MeV Betatron - bremsstrahlung monochrometer - Nal

Reaction E or &E r <rd E J

tr Noces

(7,7') 10.92

19.06

12.49

16.50

see notes

Differential scattering cross section

has maxima at 12.49 MeV and 16.50

MeV (135°)

Differential scattering cross section

(135°) data given in article.

Raman scattering considered.

Yin. 5*. Ditfcreniul quasi clastic photon scattering cross section

in Ho141 The cresses were «M»t.uned at lia m this etnenmenc and

correspond 10 a resolution oi 2'7. The circles the .»t

l uiler ami Hayward (ree reference 2) oowineu at "«tn an

energy re*»lutH;n «»i Hi* <:

'

'

' , “SL _ *-

*• -

: * !^r"/ " . " '• * *”)i V\ yr'' . -

Oi ^ • 4 -i T- -Jr

Ftc. 9 Predictions for elastic scattering at t.?5* liased on energy dependence of almiirpuon data. AU oi the curves have been

shitted to higher energy by 2»J»> keV and have been reduced hv

lO1

!; to facilitate comparison with ihe experimental points •drained in this experiment. I’he dash-dot curve is the scalar contribution to the scattering implied directiv by the absorption

data; the solid curve indicates the scaur prediction^ based on a

two- 1. 1 . rent* line lit to the absorption ilata in-iow 17 MeV. The

<la.-hcd curve includes the elastic nan •*» the tensor scattering implied by the hydrodynamic model.

FtC. 10. Predictions for elastic plus Raman scattering .it l based on absorption 'lata. The up|>er curves inciuue me -

contributions obtained from the absorption uata >v •urei applying the dispersion relations; this *calar contrii.«ti"«i been assumed to have a dipole angular dependence out

fitting was used to represent the absorption data. The caicul.u. of the tensor contributions used a two-line lit ulasned curves

a three-line tit (solid curves). The lower curves give tne ter contnhuiions alone while the uPtwr curves represent the : expected scattering. All of the curves have I wen -nifted ur energv by 100 keV and normalixeu bv a factor of 0.02 to taciii; comparison with the experimental points. _L I form HBS-418

<••1-631 U3C OMM-OC 18996-P63

-.J. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PH0T0NUCLEAR DATA SHEET 457
REP. M. Langevin, J. M. Loiseaux ec J. M. Maison

Nucl. Phys. £4, L14-L24 (1964)

£L EM. SYM. A z

Ho 165

METHOO

Bremsstrahlung scattering

REP. NO. [Page l of 2] 64 La I JOC

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TY PC RAN9K TYPE RANGE

•A G,G ABX 10-25 C 27 NAI-D DST

Tableau 1 La panunttre a(E) da la distribution angulaira

Noyau

11.5-14. McV

Exp. Ellipsoidal Triax.

14-17.5 MoV 17.5-20 MaV 20-30 M«V

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

Tb 0.41 0.39 0.54:°;}*

Ho o-27 -?:!

5 0.44 0.407 °-43 -oiS

Er °-27-S:i

5 0.44 0.407 0.8 :°;} 5 Ta 0.6 !°;}* 0.58 0.68:°;}*

Au 0(3,(11-20 MeV) - 0.9 au (11-20 MoV) « 1

0.70 0.50

Contribution Quadrupoiairt %

25 0.97 0.85

0.71 0.53 25 0.95 0.9 0.4±0.1

0.71 0.53 25 0.95 0.9

0.81 20 0.94 0.7±0.1 I

Fig. l. lUsultats axpdrimsntaux et sections efflcaces da diffusion ddduitss pour lTjolmium, - 27 MoV.

FORM NBS-4ia

IR*V. 7-1 4.441 UJCOMM.OC 2S010-RS4 PHOTONUCLEAR DATA SHEET 458

U.S. DEPARTMENT OP COMMERCE

NATIONAL IURKAUOP STANOAPOJ
REF. M. Langevin, J. M. Loiseaux ec J. M. Maison

NucL. Phys. LL4-124 (1964) Ho Lc5

METHOO

BremsstrahLung scattering |_Page 2 of 2_

REF. NO. 64 La 1 JOC

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

Rfr 3. Section* efflcaces experimentala differentiella de diffusion, obtenua pour i’holmium et

I erbium et comparaison avec lea rdsultats experimental!* de Tipier et at. “). (T.A-S.S.). La courba

tr«c6a correspondent i Implication da relations de dispersion aux sections <**<-*'-« d'absorption obtenua par Fuller et Hajward *) (F.H.) et Axel, Miller, Scimbl, Tama etTzam(A-M-S.T.T.)“).

11.3-14 MeV 14-17.5 MeV 17.3-20 MeV

, t 25 %

FORM NBS-41S

(RXV. 7-1 4.441 U1COMM-OC 24010-P44

Fig* 8* Repartitions angularres du rayonnement diffuse obtenua pour le terbium, Tholmium,

Terbium et le tantale dans la zona d’energie 11.5-14 MeV. 14-17.5 MeV et 17.5-20 MeV. PHOTONUCLEAR DATA SHEET 459

U.S. DEPARTMENT OF COMMERCE

UTIONAL BUREAU OF 3TANOAROS
REF. E. Ambler, E. G. Fuller, H. Marshak

Phys. Rev. JJ8, B117 (1965)

£L£.M. 3YM.

Ho 165 67

METHOO

Betatron; ion chamber monitor

REF. NO. 65 Am 1 NVB

REACTION

l RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE ft AN GC $G,XN ABY 10-20 C 10-20 BF3-I 4PI

ORIENTED TARGET

Fig. 5. Asymmetry of photoneutron yield measured at 0.29°K. The root mean square errors determined from the estimated uncertainties in the asymmetry measured at 77°K and the rms

deviation of the measurements at 0.29°K are indicated in the experimental points. The abscissa represents the peak energy of the bremsstrahiung spectrum.

Fig. 6. Dependence of photoneutron yield asymmetry on the angle between the photon-beam direction and the nuclear align- ment axis. The uncertainties indicated in the experimental points

are defined in the caption for Fig. 5. The line at 1.5 is the value expected for a pure iVcostf) dependence of the alignment edect. The ordinate represents the peak energy of the bremsstrahiung

spectrum.

Fig. 8. Photoneutron-producing cross section for Hou‘ as a

function of photon energy. The points above 14.25 MeV have

been corrected for neutron multiplicity. Horizontal bars represent

typical statistical uncertainties in data points. Light extensions on the bars indicate the uncertainties in the multiplicity correction. The smooch curve is calculated from the theory of Danos

and Greiner using the parameters given in Table I.

Corrected data from 62 Fu 3.

FORM MBS-418

IRtV. 7-1 4.441 UJCOMM-OC 24010-P44 PHOTONUCLEAR DATA SHEET 460

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANO/ROS
Fio. 5. — Deux ou trots raies de Lorentz.

TABLEAU 1 Decomposition bn deux raies dr Lorentz

1" RESONANCE 2* HERONANCB Section BPEICACE INTECREE (MeV.b)

mb M^V r

MeV mb

E,

MeV rMeV

E%lEl 2 ( I’- iE N7 v exp. 0,06 1,4

<?„b

232 ± 17 12,00 ± 0,07 2,27 ± 0,28 308 ± 16

15,55

±0,13

sio ± 0,6 1,105 ± 0,024 19

± 1,1 3,24 ± 0,58 2,54 3,34 7,23 ± 0,6'. 240 ± 8 12,03 ± 0,015

2,43

±0,16

308

±6

15,62

±0,06

4,60

±0,20

1,297 ± 0,010 2,47

• ± 0,4 3,19 ± 0,3

» B 7,39

± 0,4

461

3MMERCE

XIMOAROS
REF. P. Axel, J. Miller, C. Schuhl, G. Tamas and C. Tzara

J. Physique et Rad. 27, 262 (1966)

| EL EM. SYM.

Ho

MeTHO ° [Page 2 of 2]

Monochromatic gammas from annihilation in flight of positrons.

165 67

REF. NO.

66 AX 1 JDM

1"

•» TABLEAU 2 Decomposition en non raise oe Lorentz (courbe n« III de la figure 5) 2 M?V MeV mb

220 12,0 2,34 173

2* RESONANCE

e, r.

3* RESONANCE

E, MeV MeV

15,0 5,73 151 16,0 3,7

®*_r«

1,75

7t r, n

<^Ti " 2

24<* r«

1,1 3,16

ANGLE

E MeV

1 X6

10,4

TABLEAU 3 Section eppicace oipperentielle os diffusion elastique

8-90® 0 - 134®30' de (134*30') /de (90*)

0,228 ± 0,020 mb/sr

0,347 ± 0,030 mb/sr

0,314 ± 0,030 mb/sr

0,430 ± 0,040 mb/sr

1,46 ± 0,25

1,24 ± 0,20

TABLEAU 4 de

CaLCUI oe jq ( 0) A PARTIR DES COURSES d’aBSORFTION DES PHOTONS

90®

12,6 MeV

16,4 MeV

de (16,4) /de (12,6) caicule de (16,4) /de (12,6) experimental

6 » 135®

0,307 mb/sr

0,525 mb/sr

0,247 mb/sr

0,376 mb/sr

1,52 1,71

1,53 ±0,45 1,37 ±0,27

de (135®) /de (00®) caicule U4

1,40

4-

20

de (135°) /de (90®)- experimental

l,46-± 0,25

• 1,24 ± 0,20

Fic. 6. — Section efficace de diffusion elastique des rayonnements gamma pour le noyau de lwHow

U.S. DEPARTMENT OF COMMERCE

NATIONAL IUKIAUO, STANOAROS

462
REF. P. J. Scanlon

Nuclear Phys. 88, 424 (1966)

METHOO

£7

70 MeV Synchrotron 66 Sc l JDM

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TV PC RANGE TYPE RANGE

G,P SPC THR-70 C 70 TEL-D 6-14 90,135

G,D RLY IHR-70 c 70 TEL-D 6- 14 90,135

G,T RLY THR-70 c 70 TEL-D 6- 14 90,135

Tabu l Numbers of photoparticles from 1MHo with energies in the range 9.0 MeV to 13.5 for a peak photon

energy of 70 MeV

Angle

(deg) Protons Deuterons Tritons Deuterons/Protons Tritons/ Deuterons

90 1905 76 19 0.04 0.25 135 1017 35 11 0.03 0.3

Fig. 5. Upper curve: photoproton spectrum at 90—6° to beam. Lower curve: photoproton spectrum

at 135± 6® to beam. The upper curve has been normalized to the same beam dose as the lower curve. Both energy scales are corrected for proton energy loss in the target.

FORM NBS*41$ (MV. 7-1 4-441 VJSC OMM«OC 2601 0-P€4 PH0T0NUCLEAR DATA SHEET 463

U.S. DEPARTMENT OF COMMERCE

NATIONAL SURSAUOF STANDARDS
EL EM. SYM.

Ho 165 67

REP. NO. 67 Ge 2 HMG

* eF‘ H. M. Gerstenberg and E. G. Fuller

NBS Tech. Note 416 , June 1967

METHOD

' REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANGLE TYPE NANO* type HANOI

G,N ABY THR-27 C 22,27 BF3-I 4PI

Table 7. Comparison of neutron yields. Yields are given In units (neutron ca*/freV nucleus) xlO'**

.

The estimated uncertainties- In Y and Y

e are of the older of 6% and 10f, respectively.

pom MBS-41S

(msv. 7-i 4.ui USC OMM.OC 2SOIO-PS4 PHOTONUCLEAR DATA SHEET 464

U.S. DEPARTMENT OP COMMERCE

NATIONAL SUPEAUOP ST AN0AP09

i
Fig. 31. Abaolute neutron yield ee e function of atonic nuaber. The neutron yield fron calclua

(Z = 20) la pertlcularly low In coaparlaon with the other eleaenta becauae lta (y,n) threahold

la high coapared to the seen energy of tbe glaat resonance.

465
REF. J. R. Harrington and B. M. Spicer

PICNS-67 Contributions, International Conference on Nuclear Structure,

Tokyo, Japan 1967 (Institute for Nuclear Study, University of Tokyo,

Tanashi- shi f Tokyo. Japan) 10,16, p, jSQ 1

EL EM. SYM.

Ho 165 67

METHOO REF. NO.

67 Ha 1 EGF

REACTION RESULT excitation SOURCE oetector

ENEROY TYPC NANQC type RANSC angle

G,2N RLX 14-29 c 14-29 ACTI

4PI

YIELD TO ISOMERE

J. R. Harrimroan and 8. N. Spicer

Uhivareity of Melbourne, Auatrali*

Th* itiwBw af the electric quadr\pol* Fimt resonance of Ho145 has bam arnght in th*

Ho liS<Y,2n)Hol,fc erou section. Th* yield of Ho14 * w measured by counting th* 308 kaV

r-r«y emitted in th* decay of th* iaawie rata of Ho1 * 1

. Th* half-life of this state

(0.8 aae) required that ita activity b* canted bet, mm betatron beam burets. The yield of

Ho 1 **1 was maasurad at 0.5 MaV intaxvala batuaan threshold and 28 MaV, and tha cross aactien

axnactad by th* mathod of Panfold and Laiaa.

Branblatt at al15 showed tl»t tha Ho1 **<yW'J croa* aaction goes to aaro at 18 MaV. Tharefera, above this anaray, tha total r-ray absorption cross aaction is mmifestad in tha (Y,2n)

and (Y«3n) cress aacdons. Th* statistical theory of nuclaar reactions indicatas that tha

<Y,3n) cress aaction is not significant balow 26 MaV. W* oonfina attantion than to tha (Y,2n)

cress aaction, which will consist of contributions fra* El and E2 absorption. Tha dynanio

collsctiva theory of the El riant reaonanoa predicts two Lorents lines for Ho1 **, and

8reablett st al1

) show thaa* at 12.1 and 15.76 MaV, with widths of 2.8 and * MsV respectively.

Thus tha El cress section above 20 MaV is sooth, and all structure in tha <Y,2n) cress aaction

should arise fro* th* E2 riant resonates.

Tha naaaursd cress aaction is show, in Pic. la. An attaint has bam aada to subtract

fra* this cross aaction tha oamibution duo to El absorption. Tha result of this mib&action

is shown in Pic. lb tosathar with th# prediction of License, Greiner and Canos

2 ^ for tha E2

cress aactian structure. A measure of oonsiseancy exists bat, am tttaocy md sxpariwmt

Phys.Rev. 129 (1983) 2723.

2) R. Licanaa, W. Greiner md M. Dmost Riys.Rav.lett. IS (1988) 388. 466

u.s. department of commerce

NATIONAL. BUREAU OF STANOANOS
REF. R. R. Hurst and D. J. Donahue

EL EM. SYM. A

Ho 165

REF. NO.

67 Hu l EGF

Nucl. Phys. A91 . 365 (1967)

METHOD

Neutron capture gamma rays

Table 1 Fig. 1. Crow 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 ± 0.8 "As 20.4 ± 1.7 “Nb 0.33 ± 0.10 14.6± 2.2 25.8- 2.1 1MRh 10.6= 1.7 38.8= 3.1

I,?Ag | >«Ag | 10.0= 1.5 37.6= 2.9

llMn 17.1= 2.6 33.3 ± 2.7 1MSb | i»Sb | 20.7= 3.1 42.5 ± 3.6 iwt 38.7= 5.8 38.8 ± 3.1 1MCs 31.7 ± 4.8 52.5 ± 3.8 »”La 8.61= 0.86 40.8= 6.5 63.0- 5.0

l4l Pr 21.5= 3.2 58.3= 4.1 ul Eu 1 lMEu j

28.9 = 3.2 61.3 = 14.7 102 ±18

'“Ho 33.6 = 4.3 92.2 ±27.6 150 =20

l,,Ta 4.14=0.36 43.4 = 3.7 65.0 ± 5.5 146 =12

‘"Au 44.5 = 3.6 68.4 ±13.5 160 ±15 mPb <34.3 238 =29 "•Pb 22.6 ±11.3 280 ±31

“•Bi 36.1 =12.0 226 ±27

467

U.S. DEPARTMENT OF COMMERCE

NATIONAL BURtAUOF ST ANOAROS
ref. R. Bergere,

Nucl. Physo

H. Beil and A. Vevssiere

A121 . 463 (1963)

EL EM. SYM.

Ho 165 67

METHOO REF. NO.

_ [Page 1 of 2]

68 Be 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPl RANGE TYPE MANGE

G,N <\ 0 ABX THR-30 D 7-30 MOD-1 4P1

G,2N cf, G,3N

•

iQjt

Table 4

Lorentt line parametera for a two line fit to the total crow section dau of “JHo A(MeV) <Tt (mb) A(MeV) Et — IT—

A

12.07 230 2.7 15.62 285 4.8

rom* N6S-418 mtV. 7*14.441 USCOMM.OC 24010.P44 PHOTONUCLEAR DATA SHEET 468

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 9T AN OA NOS
*" r' R. Bergere, H. Beil and A. Veyssiere EL EM. SYM. A z Nucl. Phys. A121, 46j (1963)

Ho 165 67

METHOO

[Page 2 of 2]

REF. NO. 63 Be 5 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE TYPE RANGE TYPE RANGE

\

t Experimental points e’j.vC;/

* (Multiplicity)"1

Fig. 6. Reciprocal neutron multiplicity as a function ofy-encrgy for ‘“Ho.

r

POM* N8S-41*

(REV. 7*1 4*041 UICOMM.OC 2«010-P«4 PHOTONUCLEAR DATA SHEET 469

u.s. oepartmentof commerce

NATIONAL. BUREAU OF STANOARD3
B. L. Berman, M. A. Kelly, R. L. Bramblect, J. T. Caldwell,

H. S. Davis, and S. C. Fultz

j?hys. Rev. 1§5, 1576 (1969)

EL EM. SYM.

Ho 165 C(

METHOD HEP. NO.

69 Be 8 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

TYP ANGLE c RANGE type nance G,N* .(,5 ABX 3-29 D 8-29 BF3-I 4PI

G , 2N*"* |W ABX 8-29 D 3-29 BF3-I 4PI

G,3N ikS* ABX 3-29 D 8-29 BF3-I 4PI

INCLUDES NP

INCLUDES 2NP

Fio. 9. The ares ratio RA , nuclear eccentricity t, and intrinsic quadrupole moment Q« plotted versus neutron number iV. The

data were scaled between the value for Cd‘“ and that for \V'“. The absolute scale for Qt is based on a mean radius parameter R»m 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 0.06S (17%) for XA, 0.010 (1.9%) for «, and 0.16b (3.7%) for Q+

[over]

form N8S-4IS

(REV. 7- I 4-«4l UICOMU.OC 2SOIO.P.A PHOTONUCLEAR DATA SHEET 470

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BURCAU OF STANOAROI
Tabli V,. Parameters at Lorerut-curve fits to the giant resonance. 10R.L. Brambletc . j .

Nucleus £-(1) (MeV) 0.,(1) • (mb) r(l) (MeV) £*(2) (MeV) 0.(2) • (mb) r(2) (MeV)

Xf Cdldw^ii^ R • R« Harvey, S^C. Fultz.

Eu- 12.33ds0.06 155ds9 2.75ds0.26 13.79*0.10 222*6 5.83*0.30 “ PhyaJCev.r^, B269

Tb“ k 12.22*0.04 181ds6 2.64*0. 16 13.67*0.06 220*4 4.97*0.19 L1 (1964).

R.L. Bramblect,

Gd- 12.23ds0.06 215*9 2.77ds0.23 13.96*0.09 233*6 5.28*0.30 J.T. Caldwell, C.F.

Ho- 12.28d;0.02 214dsS 2.37ds0.1I 13.78*0.04 246*3 5.00*0.17 Auchampaugh , S . C

.

Ta— • 12.39ds0.03 171ds8 1.94*0.12 13.13*0.12 265*6 4.98*0.23 Fultz, ?hvs .Rev . 12 ;. \V— 12.39ds0.03 211dsl4 2.29*0.14 14.88*0.08 334*8 5.18*0.14 2723 (1963)

* The uncertainties for •*

* l>n* Ixn an nluin. Tha absolute uncar- and lubnequent tables (aca text), taiuty ia 7% (10% far Tb*« aad Te»«). ‘Tbedatao* Ref. It ware reanaiyaed to obtain tha values lives ia this k Tha data ef JU4. 10 vara raaaaiyaad ta obtain Uia vnlaae liven la this aad subsequent tables (me tan).

Tabl* VIII. Nuclear rsuliua parameter*.

Nucleus o.;

(i»> Refs. . e k

tfe* (19 d»)

Euiu 6.99*0.08 0.595*0.015 1.276*0.018 6.80*0.28 Tb- 7.41*0.11 e 0.598*0.009 1.274*0.013 7.23*0.26 Gd- 7.55*0.17 8 0.645*0.014 1.245*0.020 7.71*0.30 Ho- ,7.56*0.11 e 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*0.05 0.390*0.006 1.259*0.011 5.96*0.21

* Values Lakea from or computed from tha references Uatad la coiama J. k Valuer from present data (Table VII).

* Computed from Eq. (2) ia the text. 4 The "bast" values for Q« deduced from the preseat data, computed from

Eq. (2) ia the text, ukinc R* to be 1.24*0.02 F.

* M. CCMe-oa aad B. Elbek. Nud. Phya. IS. 1M (1940).

1 R. A. Caniaa. Jr„ P. D. Gupta. R. B. Sutton. U. N. SosukL A. C. Thompson. R. E. Cot*. W. V. Prestwich. A. K. Gaicaiaa. aad S. Rahoy.

Phys. Rev. Lettara 20, IH (IMS). Taslx DC Integrated cross sections.

p. 74 (unpublished).

k R. G. Stokstad aad S. Person.

Nucleus

IMl (MeV)

FlatCfr. "> +

(V. /«•>]* (MeV-b)

'tasCOr. 2*) +

( (McV-^

3a) (MeV-b)

*ta£(?> 2a) +(7. /2a)]

Intal) * M>-o>ni)+

a-(2)r(2)]«

(McV-b)

0.06 SZ/A

(McV-b)

Eu- 28.9 1.57 0.67, 0.04 0.29*0.04 2.70*0.19 2.22 Tb- 28.0 1.41 0.89 d 0.39*0.08 2.47*0.12 2.31 Cd- 29.5 1.45 1.00 0.08 0.39*0.05 2.87*0.20 2.30 Ho- 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* l 0.40 **0.08 2.59*0.15 2.61 \V— 28.6 1.66 1.19 0.15 0.40*0.05 3.47*0.17 2.67

* P. it. Stetson aad L. Grodxias. Nud. Data A 1,21 (IMS).

k F. K. McGowan and P. H. Stetson. Phya. Rev. 100, 001 (10SB).

1 E. M. Bernstein and R. Cnetxer. Phys. Rev. 110, 1 J21 (1M0).

* R. C. Barrett. S. Bcrnow, S. Devons. 1. Duerdoth. D. Hitiio. J. W.

Kart. W. Y. Lee. Z. X. Macacno. J. Raiawatcr. and C. S. Wg. Columbia

Uaiversity Peiram Nuclear Phytic* Lab. Report No. N'YO-72-191. im*.

• .Ml measured intrarated crow wetloa values are liven for aa imw

rexioa (ram threshold to £? was.

» The word “total" ta thia table refers ta the total phetaaeauea eroaa

•action. #((7. e) + (V. /a> + <7. 2a) +(7. /la) + (7. Jo)|.

* The uacartaiaucs Uatad here are relative: ta tet the abealute wear*

taiaty. a systematic uacartaiaty mt 7% (10% far Tbd* aad Ta*«) mam be

fohled into the values (or (•

* Not inmsureit In Kef. 10; 2n) + (7. /2s)| coataina l»im(7. Jo).

* Because mas lam low. these velum cannot be compared ta the rest.

1 Not measured ia Ref. lit tha (T. Jni cross sacuoa below 2Ah is MeV

probably aeaUdhio.

Tabuc X. Integrated momcnU* 0( the mexwircd photnnculron cross section and sum rules.

•-t (mb)

0-4/1“— (mb)

r-i r-iAT 0.05175 ANucleus (mb-McV*) 0.00225 AM 0.05175 A- (MeV)

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 Cd- 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

(14?) (0.145) (10.66) (0.82) (0.97*0.13) (28.1*2.8)

W» 203 0.191 14.51 1.06 1.26*0.11 21.6*1.5

(•smaa

• #-s- //Stas aad rj-

[•ymm

(fibs 471

wiiere # ia the total photoneuuoo erase section. k Because ia aa law, tha values (or Ta1 * cannot be compared so tha rest.
I M. A. Kellv, B. L. Berman, R. L. Bramblett and S. C.

Phys. Rev.'i72, 1194 (1969)

method

FUltz

Ho 165 67

REF. NO. 69 Ke 2 hmg

REACTION RESULT excitation

ENERGY

SOURCE oetector

ANGLE

.TYPE RANGE TYPE PRANGS

$G,XN ABX 10-21 D 10-21 BF3-I 4PI

PHOTON ENERGY— MeV

Fio. 14. The intrinnic cross sections for Ho1**. The cross section

is associated with vibrations along the nuclear symmetry

axis. One-half rx is half the cross section associated with vibrations perpendicular to the symmetry axis. The error bars represent

statistical errors, and not those due to the uncertainty of /*.

i •iii’

TASOtT X HAM

^TAAOSt II HAM

» L I1 1 1 I1 1

I '• u m t4 it » a

’NOtONtNUeV—MWV

Fio. 10. The two unpolarised cross sections taken with the

target oriented parallel to the photon beam and perpendicular to the beam. The target temperature during these measurements was 4.2*K; otherwise, the conditions were identical to those during

the polarised runs. The solid line is a two-component Lorentr curve fit to the data, the parameter! of which are given in Table

, [over]

roffM MBS-41S IMV.

USCOMMwOC 2C010wP«4 PHOTONUCL EAR DATA SHEET 472

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OP ST ANOAROS
»

Fio. 16. The intrinsic cross sections for Ho1-. The cross section

#11 is associated with vibrations along the ‘nuclear symmetry

aids; #* is that tssoriatrri with vibrations perpendicular to thu

axis. The error bars represent statistical errors, and oof those due to the uncertainty of ft. The solid curves are those derived from the elementary collective model; the dashed obes an cako»

lated froea the dynamic collective model.

473
RE?. T. Methasiri and S. A. E. Johansson

Nuel. Phys. A167, 97 (1971)

z

MfTHOD

; EL EM. SYM. I A 1

I

i i

i Ho 1

I i1

: RE C . NO.

165 67

71 Me 1 egf

i REACTION RESUL.J excitation

ENERGY

SOURCE oetector

ANGLE

TVPC range TYPE RANGE

G.F ABY THR-900 C 300-900 FRG-I . 4PI

Tabu 1 The constant fission cross sections above the threshold

Element (cm*) Element <zf (cm1

)

Pb (5.0=0.2)xl0_lt U (1.1 ±0.1) x 10" 1 * Au (1.7=0.l)xl0-” Sn (4.3il.l)xl0- 2 * Ta (3.3=0.2)xl0-*» A« (8.4=2.0)xl0- 1 * Yb (1.2 =0.2) x 10"** Mo (1. 7=0.4) x 10 -1 * Ho (5.3±0.3)xl0-*» Cu (6.6=l.2)xl0-«

Gd (3.3=0.8)xl0-** Ni <5.8±0.1)xl0-V

Nd (1.3 =0.2)x 10“**

[over]

F O RM NBS-419

(RCV. 7 .I 4. 94 I UJCOMM-OC 2«0t0*P«4 PHOTONUCLEAR DATA SHEET 474

U.S. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OF ST ANQAROS
Fig* i* Cross sections per equivalent

quantum d (E) as a function of log E.

475
REF. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H. Thies

Nud. Phys. A210, 355 (1973)

EL EM. SYM.

Ho 165 67

REF. NO.

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

TYPE angle if RAN6I TYRE nance G,N NOX THR- 27 C 10- 27 BF3-I 4PI

Fig. IS. Ratio ijt, versus atomic number A. Here is the level density parameter taken from

the neutron resonance work of refs. '• 1

), and <i, 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)

U.s. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANOAROS

form N8V418

(MV. 7-14.641 U3COMM.QC 260 1 0* P€4 PHOTONUCLEAR DATA SHEET 476

REF. D.K.

Izv.

Bull

MCTHOO

Kaipov, Yu. A. Lysikov

Akad. Nauk SSSR Ser.

Acad. Sci. USSR Phys

, and Yu.K. Shubnyi

Fiz. 37, 1095 (1973)

. Ser. 37, 160 (1973)

I EL EM. SVM. A

Ho

REF. NO.

165 67

73 Ka 8 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TVPI RANGE TYPE RANGE

G,G ABX 95* D 95* SCD-D UKN

*ENERGY IN KEV

Fig. 2. Scattered radiation

spectra: b) with 155Eu source

(E a 105 keV) . *i) Ho scatterer;

Y

2) (Ta + Cd) scatterer. N is the

number of pulses in an interval of

10 min. a) 165Dy source. 1) Ho

scatterer? 2) (Ta + Cd) scatterer.

N is the number of pulses in an

interval of 20 tain.

The counting ratio for Ho and Ta + Cd was N’Ta/NHo - 1.065 i 0.015 (this is an average

for ten series of measurements) . Figure 2a shows the spectrum of the scattered radiation

in the region of 100 keV using the 165Dy source. It is clear from this figure that the elastic peak is recorded against a background of strong Compton scattering due to the

higher energy 165Dy y-rays. In this case we have found that N

Ta/NHQ - 0.675 * 0.118.

The resonance scattering cross section was calculated by comparing the resonance scattering xntensities with the Rayleigh intensity, the cross section for which can be calculated

exactly. We found that a » (1.95 ± 0.35) *10"25 cm

2 ‘sterad"1

, which corresponds to T -6 - 0Y » (4.85 = 0.82) •10_o eV for the radiation width of the 94.69 keV level of 153ho and

x y - (1.36 c 0.24). IQ'10 sec.

form M3S-418 (MV. 7.14.64) USCOMM.OC 26010.p«4 PHOTONUCLEAR DATA SHEET 478

U.S. DEPARTMENT OF COMMERCE

NATIONAL SURCAUOP STANDARDS
REF.

D. Cacana, G. Baclu, M. Ionescu-Bujor , V.I.R. Niculescu, and

C. Illescu

Nucl. Phys. A225 , 157 (1974)

EL EM. 5 YM. A

Ho 165 67

METHOD REF. NO.

74 Ca 7 egf

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

ANGLE TYPE RANGE type range

G.XN ABX 8- 23 C 8- 23 BF3-I 4PI

Fig. I. TotaJ cross section data showing a two Lorcntz line fit for “5 Ho. The total cross sect:, has been obtained taking into account a(y, 2n) from ref. J

) (C) and from ref. *) ( :< ).

Table 1 Comparison between the absolute cross section values for 185 Ho

E

(MeV)

a

(mb)

. E

(MeV)

<r (mb)

£t (MeV)

*1 (mb) £1 (MeV) (mb)

Ref.

9 35.6£4 10.83 150£20 “)

9 36 ±2 10.83 133 i 6 12.4 290 £1

1

15.3 275 £1

1

J

) 9 48 ±3 10.33 165£ 5 12.2 323 £ 1

8

15.4 325 £ 1

8

*) 9 44 ±3 10.33 143 £ 3 12.6 £0.1 301 £10 15.3 £0.2 330 £ 18 present

(over)

form N3S-418

(R C V . 7-14-641 USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 479

U.S. DEPARTMENT OF COMMERCE

NATIONAL 8UR6AUOF STiNQlROS
Comparison between the Lorentz line parameters for a two line fit of the total cross section da

of l45 Ho

£. A ot Ex A O'. fiXjd£

jffld£

Ref.

12.02 ±0.04

1128 ±0.023

12.2 *1107

1130

12.13

2.33=0.22 137=0.11 133

17

160

149

236±12

214±15

219

'250 223 204

13.59 ±0.09

15.78=0.0044

1615.62

15.65

15.61

4.85 ±0.4

5.00 ±0.1

7

5

4.8 4.65

4.66

308 ±11

246 ±18

226

285

290 245

2.69 124

2.60 107

130

125

*>

3

) *14

) present theory

Table 3

... measured cross sections and sum rules for 14

1

Ho

Integrated cross section, moments of the different measured cross

(To- exp.

(b • MeV)

(Tot

(b • MeV)

(Tot 0.06 NZIA

O-l

exp. (mb)

<t-il

(mb)

o-it A*

O-i

exp. (mb • MeV-1

)

O-IL

(mb - McV-‘)

r

151 179=0.23

160±0.2

181

3.71 3.04

2.59

1.12

1.34

1.27 1.09

166 194=:I4 178± 15

177 203

171 163

0.20

0.23 0.19

0.13

11.56 14 ±1

118±1.5

13.55 16.07

14.66 1133

173

3.24 195

15

Table 4

Parameters used for computation of El photoabsorption cross section

e !•« < A

1 AE (MeV) a r (MeV)

(V - 4 JV-5 .V- 6 (V- 3 N - 4 V- 5 21 m

n P JAf- 0 J/f- ±1

0.30 0.45 0.448 0.434 0.35 0.623 0.630 0.05 0.01

1

0.76 1.05 1.96 1

2) 2. Ambler ec el. , Phys. Rev. 138 (1965) B117

3) B.L. Berman ec al. , Phys. Rev. 125 (1969) 1576

A) R. Bergere ec al. , Nucl. Phys. A121 (1961) 463

5) P. Axel ec al, J. da Phys. 27 (1966) 262

16) R. R. Hursc ec al. , Nucl. Phys.- A91 (1967 ) 365

for

in i ela:

higi

The

ict« exac » (4

480

FORM

(MV.

USCOi
PCF H. E. Jackson, G. E. Thomas, K. J. Wetzel

Phys. Rev. Cll , 1664 (1975)

! EL EM. SYM.

Ho 165 67

METHOO PEP. NO.

75 Ja 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G, G ABX 11 D 11 SCD-D 150

(11.387) (11.387)

-

TABLE L Differential cross sections measured for

elastic and inelastic scattering of 11.39- Me V 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, tbs 90* uranium elastic cross section.

9 da/du (elastic) du/du (inelastic) (deg) (mb/sr) (mb/sr)

°*U (2*. 45 keV)

90 0.169* 0.011 0.173*0.016 uo 0.335* 0.041 0.236* 0.24 a*Th (T, 45 keV) ISO 0.331* 0.03S 0.210*0.022

,uTa (-f*. 136 keV) (If, 301 keV)

90 0.073* 0.008

0.020 * 0.004 0.009* 0.004

ISO 0.145* 0.01S 0.017* 0.004 0.017*0.004

,mHo (f, 95 keV) (If, 210 keV)

ISO 0.141*0.014

0.022 * 0.004 0.013*0.004

l **Tb (•$•*, 58 keV) ($•*, 138 keV)

90 0.062*0.006

0.024 * 0.003 0.013*0.003

ISO 0.134* 0.012

0.042 * 0.004 0.019* 0.004 uipr

ISO 0.030*0.008 ...

RATIO RAMAN/ELASTIC

TABLE HL 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 ISO*. The parameters

used in the calculations for column S are given In Table

IL Column 4 describes results obtained by perturbing

those parameter to meet the constraint of Eq. (3) (see

text).

do<0)da

(mb/sr)

Target Calc. Exp.

8-150* • Ft 0.02S 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* O.0i4 0.28 0.28 0.25*0.04 T» 0.160 0.145*0.015 0.23 0.22 0.23*0.04 Th 0.2S3 0.331*0.035 0.59 0.63 0.64*0.08 0 0.289 0.355*0.041 0.78 0.73 0.67* 0.07 6-90* Tb 0.062 0.062 * 0.008 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* 0.009 1.29 1.15 1.03*0.10

P O pm N3S-418

in ev. 7. 1 4.041 USCOMM-NSS-OC PHOTONUCLEAR DATA SHEET 481

U.S. OEPARTMENTOF COMMERCE

NATIONAL BUREAU OF STANQAROS
REF. V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257

,

438 (1976)

EL EM. SYM.

Ko 165 67

METHOD I REF. NO. 76 Em 2 egf

REACTION RESULT excitation

ENERGY

SOURCE DETECTOR

angle

rvPC RANG! TYPE RANGE

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

'

.

Table l Measured values of«, at f— 1000 MeV and deduced values of assumed constant from £<, to 1000 MeV

999 = 1 GEV

Element Z

xfA •k (mb)

£o (MeV) (mb)

Bi 3196 121 ±0.6 :oo 7.6 ±0.6 Pb 3145 5.4±04 220 3.6 ±0.3

T1 3110 4.1 ±01 230 18 ±01

Au 31.6S 10±O15 240 1.4 ±01

Pt 31.18 1.1 ±0.08 2SS (8 ±0.7) x 10* ‘ Re 3021 (3.7 ±01) x 10-' 280 <19±01)x 10* ‘ W 29.78 (31 ±01) x 10“ ‘ 290 (18 ±01) x 10“ * Ta 29.45 <31±0!)x 10-' 300 (17 ±01) x 10* ‘ Hf 29.04 (h7±02)x 10* 1 310 (1.4±01)x 10” 1 Yb 2811 (11 ±0.1) x io- 1 330 - (ll±0.1)x 10* r Tm 28.18 (71±08)x I0

- * 335 (6.8 ±0.8) x 10" 2

* Ho 2711 (3.6 ±0.4) x 10* 1 355 ( 31 ±0.4) x IO* 2 Dy 26.80 (16+01) x 10* 2 360 <21±01)xl0- 2 Tb 2618 (21±(L3)x 10“* 370 (15±01)xl0- 2 Gd 26.04 (1.6 ±01) x IO -2 3S0 (l.7±01)x 10" 2 Sm 2516 (U±01)xl0- 1 390 (1.4±01)xl0- 2 Nd 2436 (91 ±0.9) x IO*’ 405 (1 ±0.1) xlO-2 Ce 24.00 (8 ±0.9) xlO-* 420 (9 ±1 )xl0-* U 2319 (8.4 ±09) x IO

- * 430 (1 ±0.1) x 10" 1 Sb 2116 (ll±01)xl0-* 460 (11 ±0.3) xlO2

Te 21.19 (81 ±1 )x 10” * 465 (11±01) x 10~ 2 So 21.06 (ll±0!)x 10* 1 465 f 1.7 ±0.3) x 10 -2 Cd 2049 ( 1.7 ±0.3) x IO" 2 470 (21 ±0.4) xlO" 2 Ag 2047 (2 ±0.3) x 10- 2 470 (26±0.4)x I0* 2 Za 13.76 (2 ±0.4) x 10” 1 515 (3 ±0.6) x 10* 1 Cu 13.44 (14±01)x 10“ ‘ 515 (3.6±0.8)xl0-‘ Ni 1315 (14±01)xl0-‘ 510 (3.6 ±0.8) x 10” ‘ Fe 1110 (3 ±0.6) x 10* 1 510 (4.4 ± 0.9) x IO’ *

Fig. 2. Nuclear fissilities as a function of Z

l!A. Experimental points: solid circles represent our data;

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

7 ); and crosses, the data from ip.f) experi- ments20

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

l 'A > 26. The dashed curve is the curve VI calculated by Nix and Sassi 12

). fomm N3S-4I8 (MV. 7-1 USCOMM-N8S-OC

4

A. V. Mitrofanova et al.

Sov. J. Nucl. Phys. £,

512 (1968) . 7

T. Methasiri et al., Nucl.

Phys. A167 , 97 (1971)

.

12

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

81, 61 (1966)

.

20

N.A. Per'ifilov et al., JETP

(Sov. Phys . ) 14 , 623 (1962);

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

1965, vol . 2 (IAEA) Vienna,

1965, p.283.

z>

PHOTONUCLEAR DATA SHEET 482

U.S. DEPARTMENT OF COMMERCE

NATIONAL. SUR6AUOF STANDARDS
B.I. Goryachev, Yu.V. Kuznetsov, V.N. Orlin, N.A. Pzhidaeva,

V.G. Shevchenko

Yad. Fiz. 23, 1145 (1976)

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

j EL EM. SYM. ! A Z

I

i HO 165 67

method . REF. NO. 76 Go 4

- - ' - hmg

REACTION RESUL

T

EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE

G,XN ABX 8- 23 C UKN BF3-I • 4PI

G ?N ABX 14- 21 C UKN SCI-I 4PI

$ m*

FIG. 1. Photcr.eutron production cross section cn obtained

for "'-Ho (a) and for 1 "'Er lb). The hollow and solid circles correspond to two independent series of data. The solid carves show the (y, 2,i) cross sections calculated from the data of a statistical experiment by the regularization method. I;?! The circles near the curves give the same cross sections calculated

from, the formula ffr (l -f[E,a I).

I

FIG. 5. Cross section <rT for ‘"'Ho. The thin antfthick curves show respectively the approximations Jjr 1 and 7^

3> (see the caption to Fig. 3).

TABLE 3. Static deformation & and latrlnsic quadrupole moment Q9

.

Praia* mt Olie ptaemeJur Coulomb

txdtaooa

of nuclei

i Om b ( 4. b 4* b

Wfb

039 9.33*08 03032 029

*37

737 p1»1

6.6 (-'] 7.07 ('•]

•Ho

032 7.73*0.6 030.30 031

' 7.0i f*|

7.6 ("1 730 | ,,

J

‘•Er 030 73*0.6 03

031

6.90 (>•] T6(") 038 8.94=08 8.79 (=1

TABLE 1. Level-density parameters

a, MeV «. MeV**

Nucleus Present work Other studies Nucleus Present work Other studies ,uTb 7. 7* 111 '«Er e.l*2.S a"*' '“Ho 4.2*1.

5

3.1*"' i:, Hf 17.7*7.3 -

(over)

,9MI M3S-41S

<RCV. *-1 4* 441 USCOMM-N83-OC PHOTONUCLEAR DATA SHEET 483

u.s. department of commerce

nation a u bureau op stanoaros
TABLE 2. Parameters of fitted curves

Ntcfca f.lltV «. mb r.Mtv r m*v e.. mb r MtV 9. r.'« r i- / *;. M*V f„ MtV

-Tb 1128 102 i«i=ao9 1176 2H5 3.42=013 130=023 ,971 97 10.4 20.6 till . -13 3231=0.05 2S2 101=0.07 - 21621 MS 10.4 2US

"HI. 1131 M 174sU.lt 1023 •»3un 3.07=0.17 111=0.27 17C.0 97 10.4 20.6 1147 223 TUlxOuO 104(1 2*1 1.02=0.00 2 21)0.3 98 1U1 20.6

1132 IHI 171x0.14 1.199 3i-i .7.67=0.10 3.38=0.33 1315 94 10.7 20.0 1130 214 143=0.08 10.23 2a4 3.09=0.10 - 101.7 93 1U7 20.0 "mt 1108 ICC 223=40 13.03 211 'i.tf‘xO.27 4.00x1.70 1711 89 10.8 20.0 lias :i< 122=0.11 1.140 237 3.37=023) 2 173.7 90 10.6 300

Note. The lower values of the parameters in each column were found with the requirement e,r, io,!*! “2: 1.

TABLE 9. Integrated cross sections.

Nadn> 9. MbV* a-, mb •-* MtV-b ... aV.

,wTb .MS 1.47 210 0243 119 3.41- in-* ••Ho ICO 111 218 0241 16.1 or. :o-*

'"Et. 136 1.48 2lr. 0137 1C.1 311I0-*

"Ilf 108 L2U 11*0 0196 141 22)3* 10**

Amrtft 1.41=02) 0.23*004 3.1 IO-*=8IO-*

12

15

16

IS

19

20

21

22

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

,

Eng. transl. in Sov. Mathematics-Doklady.

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

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

E. Go Fuller et al., Nucl. Phys. 30 , 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.Fi2 . 42,

1502 (1962); Sov. Phys. JETP 15., 1044 (1962).

B.S. Dzhelepov in Struktura slozhynkh yader

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

484
G. M. Gurevich, L. E. Lazareva, V. M. Mazur, and

G. B. Solodukhov

JETP Lett. 23, 370 (1976)

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

EL EM. SYM.

Ho

A

165

z

67

MCTHOO RE f. NO.

76 Gu 5 hmg

REACTION RESULT EXCITATION ENEROV

SOURCE OETECTOR

ANGLE TY#| RANQC

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

We measured the total cross section for the absorption of rays in tfte region of £1

resonance for the nuclei '“Ho, l7*Hf. '*>Hf, “'Ta, 1UW, '“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 subsheil N » 108.

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

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

Research of the USSR Academy of Sciences (G). The crosses marie the deformation parameters 0.

FIG. 1. Total photoabsorption cross sections for the nuclei

t«Ho, inHf, 1MHf, 1MTa, 1WW, 0v6 r mAu, 2WBi.

UlCOMMHdMC PHOTONUCLEAR DATA SHEET 485

U.S. DEPARTMENT Or commerce

NATIONAL BUREAU or STANOAROS
FIG. 3. Width of Lorentz lines approximating the photoabsorption cross sections, for deformed nuclei In the region 150 < A < 185.

Nucleus

«imh

Ti

MeV

*1

MeV TTlh r,MeV MeV

£jIl

*1r, Q,

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

Ts-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 • • • • • • • • • • •• • • • • • •

486
G. L. Moore, F. R. Buskirk, E. B X. K. Maruyama, R. Pitt&an

Z. Naturforsch. 31

A

, 668 (1976)

METHOD

Dally, J. N. Dyer, CLEM. $YM. A Z

Ho

*lf. NO.

165 67

76 Mo 11 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYif RAN OK TYPE RANGE

E,E/ ABX O 1 vj- N D 75,105 MAG-D 75

Inelastic elytron scattering confirms broadening of the isoscalar (JT-0) E2 giant resonance in luHo as compared « magnitude between Mr 11 re • exPenm“ts « reconciled. The isovector (Jr-l) E2 giant resonance is, for the first time, observed

to be split into at least two parts.

Fig. 1. Spectrum of 75 and 105 MeV electrons, scattered

inelastically from lMHo at a scattering angle of 75°. The

resolution is 500 keV. The background which consuls of the

radiation tail and the machine background has been subtracted. Note that the relative strength of the E 1 and E 2

resonances more than reverses, if one goes from 75 MeV

to 103 MeV. Typical raw spectra; i. e., background not substracted, may be found in Ref. 4

. The form of the E 1 reso- nance was taken from ['/, n) measurements (Ref. ,

)

;

the height was fitted. The energy weighed sum rule exhaustion found for the El resonance is 108 in excellent agreement

with the values reported in Ref. • thus proving the reliabili- ty of the background subtraction.

Table 1. Comparison of the natural width of E2 (JT=»0) resonances in spherical and deformed nuclei. The fifth column

shows that the splitting of the giant dipole resonance, i. e., the deformation of the nucleus at about 1-1 MeV excitation energy, is practically identical in the deformed nuclei considered.

Excitation Method rspherical [MeV] rdeformed [MeV]

Ar

[MeV]

JE1

[MeV]»

Ex -B(E2)

[']

(e,e0 2.8±0-2(“*Nd)b 5.0±0-2(‘*Nd)b 2J2 3.74 88 («wO 3.9±0J(I44Sm)e 4.7±03P«Sm)« 0.8 3.57 102

(e,e0 2.8±0.2(t4*Ce) 4 2.8±0J(***Pb)

4.0±0.4(,MHo)* 1.2 3.53 75

* Ref. •; b Ref. T

; « Ref. 4 Ref. I>4

; « this work. Voma N 8S-41 E (RCV. 7.14.S4I uscoMM*4es-oc PHOTONUCLEAR DATA SHEET 487

U.S. DEPARTMENT OR COMMERCE

NATIONAL lumiuor ST an OA ROS
RZW. A. Suzuki and K. Shoda

Nucl. Phys. A26Q , 172 (1976)

El. EM. SYM.

Ho 165 67

method REP. NO.

76 Su 2 egf

REACTION RESULT excitation

ENERGY

SOURCE N oetector

ANGLE

TYPE PAN GC TYPE P AN SC E,P ABX H* M1 H

1

00 D 15- 18 MAG-D 125

Proton yields obtained by summing protons with energies above levels given in tables.

t«s , ,

' Ho (e.ep)

0.1254*

Fig. 3. Cross section of the ***Ho(e, e*p)

reaction. See also the caption to fig. 2.

Tabu 1 Parameters of the present experiment

Target Atomic

number

Purity

CO

Thickness (mg/cm2

)

Lowest proton

energy (MeV)

Bin «»»

(keV)

Range of measurement (MeV)

***Tb 63 99.9 (natural) 14.37 4.70 100 15.0 -174

‘••Ho 67 99.9 (natural) 11.64 4.70 100 15.5-17.5

,4*Tm 69 99 (natural) 13.40 4.70 100 15.0 -18.0

* ,sLu 71 99.87 (enriched) 5.24 544 150 15.05-20.0 ‘•‘Ta 73 99.9 (natural) 6.73 6.16 200 16.0 -23.0

Tabls 3 Displacement energies obtained from the present data and the estimates with eqs. (20) and (21)

Target Resonance £4 (exp) £.*) £,(<! - 0.3)*) (MeV) (MeV) (MeV) (MeV)

***Tb 1st 13.75*0.15 15Ji3 16.06 1543 2nd 1640*0.15 15.46 ‘••Ho 1st 16.15*0.14 15.64 16.33 1645 "*Tm 1st 15.76±ai3 16*20

16.76 16.63 2nd 16.34*0.14 16.22 ”*La 1st 16^4*0.13 16.75

17.07 16.93 2nd 17.45*0.15 1645

*®»Ta 1st 17.31 *0.15 16.40 17.38 1744

*) Estimated with eq. (20). •) ritimatril with eq. (21).

Tabu 4

Deformation parameters of IAS du. derived from the (e, c'p) result

Target Resonance IAS Parent

state 6u«-V)

(assumed)

W)

“*Tb 1st |" (521

J

ground —0.008 041 040

2nd I-CS12J 873 keV —0.016 0l29 ‘•*Ho 1st I* I«331 ground —0.023 0.30 048

“*Tm 1st *-13211 ground —0.018 a29 047

2nd *-[310J 563 keV -0.019 047

l7 *Lu 1st *-(5141 ground —0.010 043 047

2nd *-[3031 1420 keV —0.029 045

‘•‘Ta 1st *"[3031 670 keV —0.046 0.26 041

The assumed deformation parameters for the parent states d, are also shown.

*) The errors are about ±0.01. 488

U-S. DEPARTMENT OF COMMERCE

NATION*!. BUREAU OT STANOAROS
*zw. T. Bar-Noy and R. Moreh

Nucl . Phys. A275, 151 (1977)

CL CM. JYM. z

MCTMOO

HO

rer. no.

L" 77 Ba 7

165 67

egf

reaction RESULT EXCITATION CNEROV

SOURCE OCTECTOR

ANGLE TYRf RANOI tyre rang*

G,G ABX 8- 12 D 8- 12 SCD-D DST

Ali: tract : Diti'erential cross sections for clastic and inelastic Raman scattering f

r :m t L

r deformed hea\ y

nuclei ''’To. ,65 Hoand !,, Np-wcrc mea.-ured at five er.e.gie -

, between 8.S and ii.-tl.fcV. Angular

distributions a: four ancles between 90' and !4fr for bntii ehutic and ir.cl-siic stuttering a: 9.0 a:.c II.- Mas' were also measured. Tbs m^nornergetic photons were obtained from thermal neutron

capture in Ni and Cr. All the angular distributions and the elastic and Rant an scattering s', ti.c higher i— orgies are in good overall agreement with theorer : :.a! predictions. The theory is bused on a

mcdifie-i rmplo rotator mode! ofthe giant dipole resonance in which the effect of CeibrucN scattering was 'ncluded A trend of both the e!a>'ic and Rarmn scattering at tower energies to be stronger than expe .-ed are sn;; sated by the data. ' •wever, the ratio between the Raman ar.d clastic scattering seem to be :rt read agreement with theory throughout the whole energy range. Tr is shows that there

is no 'sea to in ; r.. dace a three: non.rvsonant component to the imaginary part of the clastic scattering amplitude to explain the experimental dais.

roam H 8S-41 C miv. 7>i i-ui USCOMtMISOC

over _

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OP STANDARDS

PHOTONUCLEAR DATA SHEET 489
RATIO

ENERGY (MeV)

Fig. 6. Ratios of Raman/elastic scattering cross sections at l-t*> for ,,TNp. u,Ho and ,s*Tb targets. Here. R, and R2 refer to the first and second Raman lines. In the solid and dashed lines, the nuclear resonance amplitudes were obtained using parameters extracted from fits made to the Livermore and

Saclay measurements respectively. (See text, table 3 and caption to fig. 3.)

Fig. 3. Angular distributions of elastic and inelastic Raman scattered lines from ,MHo. Here. S and L

indicate calculated values where the nuclear resonance amplitudes were extracted from the (7. n) data of

Saclay and Livermore. See caption to fig. 7.

490
*er. J.J. Murphy II, H.J. Gehrhardt and D.M. Skopik

Nucl. Phys. A277 , 69 (1977)

MCTHOO

CL EM. SYM. A

Ho 165 67

mtr. ho.

77 Mu 3 egf

ACTION SUIT EXCITATION CNKNOY

source octccton

E,A ABX 14-100 100 MA6-0 50

Ft*. 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 N8S-4 U

INKY. 7.1 4*441 USCOMhKMIs-OC

Fig. 2. Energy of the cross section peak as a function of Z. The solid line is the energy of the classical erartmentor commerce

Coulomb barrier. 49 ^ ac iuriau of st »no*ros

|a

|>.Ui
ReP. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

Nucl . Phys. A3 51 , (1981)

EL EM. STM.

Ho

A

165

z

67

METHOO

- 81 Gu 2 hg

REACTION RESULT EXCITATION ENEROV

SOURCE OETECTOR

angle TYPE HANOI

G.MU-T ARX THB-Pfl r. ?7 NAT-D . APT

Abstract: The curves of the tola muon cr \ffcnnn« in \

* 1 ? range for the nuclei '“Sm. “*Gd. '"‘Ho. '"‘Er.

‘" AYb. ''"Hf. 1,0 Hf. ""Ta. l,2W. >»*W. '••W — and '"'Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections are given. Quadcupole moments ( Q„) and nuclear deformation ~ parameters (/I) were obtained.

-

For deformed nuclei in the - 1 55 < .-I < ~ 1 80 region a violation of the correlation between

giant resonance widths i /') and nuclear deformation parameters was found. f, and the widths

ol the resonances corresponding to v ihrations 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 =* HW subshell.

— fVJf ' y°'jl nu*-'var ; -absorption cross sections \aM) measured hv the absorption method for ,,4Sm -

Gd. Ho. ‘""Er. ' *Yh. '"Ilf. '-Ilf. '"'Ta. '«W. *”W. "~W and -’A„. Rms error bars are shown. 492

(OVER)

U.S. DEPARTMENT OF CO.MMEPC i NATIONAL SURCAO OF STAMQAR3S
Table I Parameters ot' Lorentz curves fitting the experimental data on a.M

Nucleus (MeV)

"i (mbi

r,

( MeV i

£. (MeV)G y <mb)

r. (MeV)

ff.f.

<r,r

,

r

(MeV)

1 54Sm 12.2 m 3.4 15.7 207 5.7 1.85 3.1

,5 *Gd 123 :o6 3.2 15.7 220 5.5 1.81 7.7 '•’Ho 123 :o: 2.3 15.2 239 4.8 247 7.0 '*'Er 11.9 ha 3.2 15.5- 275 4.5 1.73 7.4 ’’*Yb 123 297 29 15.5 320 4.9 1.30 7.1 '**Hf 12: 291 3.1 15.5 334 4.9 1.80 7.2 "°Hf 12.2 236 ** 3.2 15.3 324 5.1 1.31 7.1 ‘•'Ta 121 rrn 3.0 15.0 316 5.1 1.97 6.3 n:w 11.9 267 3.2 14.8 303 5.6 201 6.8

!.AW 11.9 315 29 14.8 321 4.7 1.65 6.3 "•w 120 246 3.3 14.5 332 5.1 2.07 6.4 ‘”Au 13.7 535 5.2

Average

error

1 .4", 1 1.2 9.3 •„ 1-j‘o 9.1 \ 4.6 % 0.22

0.2 MeV

Tam y 3 Rain's of nuclear ellipsoid axes U ). deformation parameters t /I) and intrinsic quadrupole moments ((3„). calculated Iroin £,. H,

Nucleus ' '‘Sm 1 ‘"C.d '"‘Ho '""Hr . '* 4 Yb ''111 '""Ilf '‘Ta • »i W i« w '••w

k 1 320 1.302 1 259 1.327 1 289 1.296 1.231 1.263 1.271 1.268 1 229 0 326 0.309 0 266 0.334 0.2<»6 0.303 0.238 0.270 0 278 0 274 0 235 -« Ul 7 HI 016 + if 036 + 0 032 ±0 024 + 0 032 + 0 036 + 0 026 + 0 030 + 0 0(2 0 033

6.3 6 2 5 3 7 5 7.0 7.5 7.2 6 9 7.2 7 1 6 2

v/..

. II t -0 t HIS + 0 7 + 0 6 + 0 3 + 0 9 + 0.7 + 0 8 - (1 X 1- 0

Tahi i- 4

Integral characteristics of HI giant resonance

Nucleus * «%(• ^i»L <f i « IL " .1,* (t , « IX. (MeV b) 0.06 S/. 4 (MeV b) 0.06.V/ .4 (mb) inth) (mb) (mb- MeV 1 (mb -MeV ') l/ih MeV

'**Sm 194 - (1 1)6 0.87 2.86 1.29 117 + 3.5 156 0.189 9.1 +0.3 14.3 3.23 “"(id 2.07 *0 07 091 2.95 1.30 143 + 4.6 163 0.194 10.5 + 0.4 14.9 3.30 '"‘IK- 1. S6 + 0 06 0.78 2.53 1.06 155 + 4.4 160 0.177 10.1+0.3 12.6 2.54 '"Mr 2.24 + 0.06 0.92 3.07 1.26 161+4.3 197 0.212 12.0 + 0.3 16.0 3.13 '‘Vh 2.69-0 05 107 . 3.32 1.52 195 + 3.4 240 0.247 14.5 + 0.3 19.2 3.54 '*Mlf 2 85^0 07 1.11 3.99 1.55 208 + 4.9 247 0.247 15.3 + 0.4 20 2 3 59 "111 2. ”2 — 0 <jr» 1 05 403 1.56 200 + 4.4 250 0.246 15.1 +0.3 20.7 3.61 '"'Ta 2. 34 — 0.()7 1.09 3 81 1.46 210+5.3 245 0.239 16.0 + 0.4 20.0 3.45 '*-\V 2.36 + 0.07 1.09 4.01 1.52 211+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 2 90-0 07 1 08 3.95 1.48 214+5.3 256 0.241 I6.2±0.4 21.6 3 56

3 I2r0()6 1 10 4.37 1.54 229 + 4.2 276 0.241 18.6±0.4 23.3 3.49

493
R „ M. Schumacher, F. Smend, W. Miickenheim, P. Rullhusen, H.G. Borner

Z. Phys. A300 , 193 (1981)

CL CM. SYM.

Ho 165 67

method ref. no.

81 Sc 6 egf

REACTION RESULT EXCITATION ENEROY

SOURCE detector

ANGLE type R4N«(

G,G ABX 2-7 2-7 SCD-0 90

•

~ 2.60-6.76 MEV

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 : *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.

Table 4. Properties of levels observed by photoexcitation. < d<rdQ)!*': experimental differential cross section per identified isotope or element for resonance scattering through 0-90° /*: spin-parity of excited level: m&): angular correlation function: g«i2/„ +• 11/(2/, -i- 1); r0

: radiative groundstate transition width, f: total level width. Errors in the

last digits are given in parentheses

Isotope

3S 8U “*U

20*Bi

20*Bi

:01T1n

Hg

n*W

is«w

IS«W

"l Ta

•••Ta

l,1 Ta

,#, Ho

lt5 Ho

Nd

Nd

Ce

l2 ‘Sb

l00Mo

“Mo

Mo

Mo

(MeV)

(datdQf**

(pb/sr) r r^r w{‘e)$rn-,T (meV)

r,' (meV)

V

(meV)

1754 13 (4) (1) 0.77 0.145 0.084

3.254 421 (5) I* 014 0.83 11 012(15)* 6J55 11 (4). 102 - 0.74 0.74*

7.168 1.7 (3)- 105 9/2* * 1.00 710 786 820 (40)* 6.418 8.75(30)- 102 1/2* 0.28 30 102 82 (15)* 6.759 7 (3) - - .

6.555 68 (17) - .

6.418 52 (3)- 102

1 — 0.32 1.75 14

. 6.555 9.8 (lOllO2 (1) 0.52 3.44 19

6.759 46 (10) (l) 0.58 0.17 0.13 3.010 174 (17) - 0.72 0.42 0.59

6.418 62 (4) - 0.73 0.2 0.27'

6.759 4.8 (12) - - 0.018 0.018*

6.418 10.3 (30) - - 0.035 0.035*

6.759 5.6 (14) - - 0.021 0.021* 1754 16 (5) - - 3.254 14.0 (10) - 6.759 13.4 (10) - 3.452 120 (5)- 102 - 0.60 19 4.9* 6.418 1.53 (4). 10* f 0.88 52 26 25 (8)* 6.555 4.4 (4). |02 ID 0.33 15 21

6.759 6.2 (15) - _ 7.168 8.2 (26) I02 - - - - -

k mo\ 9 r„r » 1 assumed e IV(0)g- 1 assumed *[11]

4 [28] i ,

* Upper limits in case not all the transitions to lower levels were observed

' Present work • Previous work

renu MSS-4IC

INCV. T.I4.44I uscomm-oc aeoio-***

(OVER)

PHOTONUCLEAR DATA SHEET 494

U.S. OEPARTMEHTOF COMMtPC;

NATIONAL 8CREAUOF STAMOAA3S
Table I. Differential cross sections for elastic scattering [<i<r d(2)“* of photons from ’"Co and : *Na sources by different scattering targets,

in units of ub.sr. Errors m the last digits are given in parentheses. 9

deg

Scattering

targets 2J99* (MeV)

1754* (MeV)3.010* (MeV)3.202* (MeV)3.254* (MeV)

3.273* (MeV)

3.452* iMeV)

90 «»u 517(25) 57.5(25)' 56(16) 47(4) 456 (10)' 34(6) 49(14)

:04 Bi 33.1(50) 32 (2) 33(11) 32(4) 25.6(20) 29(6) 33t 15) "“Pb 31.5(23) 31.0(16) 35 (8) 27(3) 26.6(22) 25(4) 23 i3) **n 31.5(33) - 27(12) 32(5) 24 (3) 22(7) 34i i 5) “Hg 30.0(27) - 24(10) 28(5) 25-5(13) 26(8) 20 (8) “W 215(11) - 17 (7) 19(3) 18.4(15) 18(5) 21 1

6

) ‘•‘Ta 20.0(15) 19-2 (61 193(20)-= 20(4) 17.3(21) 18(5) 21 (8) “J 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) - U7J 8.4(10) 8.6 (5) - 9(2) 7 (l) 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 «*u 55.1(251 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)" - - 29.8(47)" * *

• “Co source in Fe lattice * 24 Na source in A1 lattice (part of data have been published elsewhere)

' Transitions to excited states observed m addition to the ground-state transition

" Photoexcuation of nuclear level identified from the size of the differential cross section

Fig. 11. Same as Fig. 9 but for (A) 145 Ho. IB) ***Ce and (O ***Sn

495
U. Zurmuhl , P. Rullhusen, F. Smend, M. Schumacher,

' Phys. Lett. 114B , 99 (1982)

mcthoo

H.G. Borner CL CM. SVM. A Z

Ho 165

REF. NO.

67

82 Zu 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE

ANGLE

TV PC AAN9C

G,G ABX 3-6 0 3-6 SCD-0 DST

'

SOURCE 141 PR(N,G)

A procedure is presented to determine total photoabsorption cross sections Of by resonant scattering of 7-rays. It is shown that 9; follows along the COR lorentztan line down to 3.5 McV. Indications for nonstatistical deviations from the

lorentzian line are observed.

ing 10 ret. ( 1 3

1 . Curve b: total photoabsorption cross section

predicted by the Wcisskopt model with hindrance factor

3 x IGT*.

'O AW N8V4IE

<R«V. l.lkMI U1COMM.OC 1«010-P«4 PHOTONUCLEAR DATA SHEET 496

U.S. OEPARTMCHT OF CO.MMtPCi

NATIONAL. SUAt Au OF STAMOAH3S
Ho

A= 1 66

-

.

Ho

A=166

497
498
rcf D. K. McDaniels, P. Varghese, I. Bergqvist, D. Drake

PICNS-73, Vol.II, p. 951 (1973) Asilomar

EL EM. SYM.

Ho 166 67

method REF. NO. 73 Me 6 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE N,G RLX 14- 20 D 7- 14 NAI-D UKN

FIG. 1. The total (n,y) cross section for l65

Ho and 233

U targets. The upper figs,

show the data for transitions to the ground states of the final nucleus. The lower

figs, show the data for transitions corresponding to the first peak found in the

observed spectra below the -one belonging to the ground state transition.

form N3S-418

(REV. 7-14-64) U3COMM-N0S-OC PHOTONUCLEAR DATA SHEET 499

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANDARDS
'

500
Er

ERBIUM

Z=68

-• i=$ '#GC. JSSfc?**>

.t» <CS4 fi^J>r>»rV>Ct:'jr

- >rV'-:*-'.'2fc- 'r. V' ;

: Jt:

»J2

Erbia is one of the the three fractions that C. 6. Mosander

discovered (1842) in Gadolin's yttria oxide. The metallic

form was. not produced until 1834 when Klemm and Bommer made

a chemical reduction. During the late 1940's the Atomic

Energy Commission developed separation methods based on the

then new synthetic ion exchange resins.. The element is

available in high purity in up ta ton quantities.

rssw*!»*.S; <**+!*>*' - Er

fsoTI Er
j 502
CL EM. SYM. .G. Fuller, B. Petree, M.S.

>hvs. Rev. 112 . 55^ (1958)

Becacron; ion chamber

Weiss

Er 68

REF. NO.

58 Fu 1 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ANCLE TYPE PANGS TYPE RANGE

G,XN ABX 7-^0 C 7-^0 BF3-I 14-PI

CF PANICS THEORY

ftT**^ .

•

M‘*A

*

-

• -

1 -

•r

•

• • •

«•4- —isr

1—rir

Fio. 6. Mean energy and width of giant resonances. ‘‘E*’ and “r” are the mean energy for photon absorption and the full width

at h»if 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.

Tabu L Target properties and results.

Element Form used grams Sn Sn 4.81

1 1 8.55 La La 10.43 Ce Ce 4.99 Sm SmtOt 2.90 Tb Tb.Or 3.04 Ho H05O1 1.87 Er ErjOj 5.41 Yb YbjO. 5.57 Ta Ta 8.41 Au Au 3.16 Pb Pb 8.05

barns

SadE> nz/a

Mev-h

'T'» Mev

0.30 0.064 5.0 036 0.085 6.0 0.34 0.063 5.2 0.45 0.080 4.5 0.26 0.073 8.6 039 0.087 8.7

0.41 0.079 73

0.50 0.100 S.5 0.50 0.090 7.0 0.49 0.077 6.0 0.68 0.085 4.2 0.75 0.081 3.8

***(y.») is the maximum value and "I— the full width at .1/5 „/ 5°“ r

*100 cotreetS for mSle Lu&n’em*

Y r..T ? r

not fitted w,th resonance lines to determineThwe valu^I neutron.^, cro" ,ectio'“ ~rre«ed for multiple

Tabu IL Energies of resonances in deformed nuclei.*

Nucleus Em Mev barn* Method

£• Mev

E» Mev£i/t* Mev

Eui- Mev

»Tb>“ 14.7 6.9* CE 11.9 16.2 10.3 194 «Ho“* 14.5 7.S* CE 11.5 16.0 11.0 184 uErl° 144 21* SC 34 174 114 20.0

«F.r‘« 14.5 7.3* CE 11.6 15.9 114 20.0 t.Ta>“ 14.1 12.6* SC 104 15.9 114 174

»»Ta« 14.1 64* CE 11.9 15.2 114 174

rtAu<» 13.6 3.75* SC 124 14.1 114 164

• CE—Coulomb excitation: SC—spectroscopic: tSi/i*. Bi/t*—energies at which slant resonance drops to half Its maximum value.

* Adler. Bohr. Huus. Motteison. and Winther. Revs. Modern Phys. 28. UrJWfi

• M. L. Pool and O. N. Kundu. Chart of Atomic Nuclei (Longs College Book Company. Columbus. 1955).

Fto. S. Relative photoneutron production cross sections for tin, iodine, samarium, holmium, erbium, and lead. The points and smooth curves +3»(y,3»»)+

represent

.... the The

integral

scales areneutron-production normalized to give

cross approximately

section defined the same by ^.*<rr.(£)d£, where <rT.(£)-<r(y,»)+2o(7,2»)+»(7> total neutron yield at 40 Mev. The errors indicated were obtained by propagating the statistic^ uncertainties, (V»), in the original activation curve data through the integral cross section mi- rnid'ti^dtyal^ve'She^^So'tluahold

° mte*ra* cross sect*on curves. Dashed histograms show result of correcting for neutron

• .S-418

4.K4I

;;r i.Pio-PCC

u.s. department of commerce

Ni riON.L BUBCUOr '•Nin.lOS

PH0T0NUCL2AR DATA SoccT 503
Ref- E.G. Fuller, E. Hayward

Nuclear Phys. ^0

,

613 ( 1962 ) [Erratum: Nuclear Phys. 57. 176 (1962)]

Elem. Sym.

Er

A z

68

50 MeV betatron; BF^ , Nal counters

Ref. No. 62 Fu 3 JHH

Reaction

X E or AE E

o r S

ME J ” Notes

Er(Y,xn) 8-23.5 12 . 2±0.2

16.010.5

2.33 MeV

4.5 MeV

r25 * 5 J

= 3 . 20il 5fa 8

a( 12.2 MeV) = 318 mb.

a(l6 MeV) = 328 mb.

Correction for neutron multiplicity.

Er (y,7) Intrinsic nuclear quadrupole moment = 7.6±1.1 b. Analysis of scattering

data indicates large tensor polarizability.

1 i

- 50C — -

1

r

j

-

*oc —

.i.* '!

* •

*

. f f.i

1t -

30C mo — ’ *1' *

r

•[ ..!

-

20C —

0

i !. i -

IOC — •*

. -

a

’ t»

Fiu.

d '0 ‘2 :4 6 8 2C 22 l* MeV

Neutron production cross sections for holmium and erbium. Tlie uncertainties indicated

result from the statistical uncertainties in the original activation curve data.

a

*s

o

i - . U -fit" 1

j

9

»<a t— /

\ t

'.

. l 1 1 >• ?0 Z« Zfl \ C

Fig. 6. The differcnh.il scattering cross sections for holmium .ind erbium measured at !>»»'. The

indicated uncertainties are onlv statistical. The lower smooth curve was calculated iimih: eq. (91 from a tun c drawn through tlie data points oi tig. 4. The shaded region corresponds to the hmits

of the >calar scattering cross section resulting trom the limits of the absorption cross section given

1*v the shaded region ot fig. 4.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS

form NBS-418

(§«1®63l USC OMM°OC 18S36-P6S PHOTONUCLEAR DATA SHEET 504
T. Kaminishi, C. Kojima

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

Er 6c

METHOD

Linac; isomer yield; activity

REF. NO. 63 Ka 2 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANCLE

TYFC RANGE TYPE RANGE

G,G/ RLY 1 C K ACT1

J+PI (0.21) -

Table II. The isomers observed

Isomer Observed value Referenced value1111*’

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-89ra 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 r °- 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 0.042-0.129 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. Inducea activation rate

Element Beamenergy (MeV)

I _

jCour. :..g rate

|

( x lCOt',0 cpm) Sample form

Se 5

| 1300j mecaiiic pellet Br 4 | 1600 ; NaBr grain Sr 6 i 0.5 ! SrCOj powder Y 5 j tfly metallic grain

Rh 5 u.2 * RhCU grain

AS 5 tso metallic plate Cd 6 0.5 CdCU grain

In 6 8 metallic plate Sn 6 0.0005 metallic piate Ba 5 0.6 BaS powder

Er 4 4900 ErjOa powder Hf 5 1600 metallic plate W 120 metallic powder

Ir 5 2100 metallic powder

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

* The value measured with a G-M flow counter. OTONUCLEAR DATA SHEET 505

U.S. DEPARTMENT OF COMMERCE

NATIONAL auRCAUOF STAN3ARS3
M. Langevin, J.M. Loiseaux

J. de Physique 2k, 1027 (1963)

METHOD

CUCM. JIM. A

Fr 68

REF. NO. Betatron; photon scattering 63 La 1 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYRE RANGE TYPE RANOE

G. G ABX 9-26 c 9-27 NAI-D DST

In Figure W(0) = 1 + a cos 0

Erbium

a.0,27

FORM NBS-4H

(REV. 7-14-S4I U1COMM-OC 2S010-PS4 PHOTONUCLEAR DATA SHEET 506

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUREAU OF STANDARDS
REF. M. Langevin, J. M. Loiseaux et J. M. Nucl . Phys. 114-124 (1964)

METHOO

Maison

ELEM. SYM.

Er

REF. NO. Bremsstrahlung scattering [Page 1 of 2] 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 paramitre a(E) de la distribution angulaire

11.5-14. MeV 14-17.5 MeV 17.5-20 MeV 20-30 MeV

Noyau

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

Contribution Quadrupolaire %

Tb °-5 -S:i

s 0.41 0.39 0 54 +0-13 0.70 0.50 25 0.97 0.85 1 Ho 0.27 0.44 0.407 043 +0 1 ° -o.os

0.71 0.53 25 0.95 0.9 0.4±0.1 1 Er 0.27^;} s 0.44 0.407 0 8 -0.1 0.71 0.53 25 0.95 u.9 1 Ta °-6

-S:i

s 0.58 0.68*°;} 5

0.81 20 0.96 Au 0^(11-20 MeV) - 0.9 0.7±0.1 1 jw (1 1-20 MeV) 1

Fig. 3. Sections efficaces expdrimentales differentielles de diffusion, obtenues pour l’holmium et l'erbium et comparison avec les rtsultats expdrimentaux de Tipler et at. **). (T.A.S.S.). Les courbes

tracdes correspondent 4 {’application dee relations de dispersion aux sections efficaces d’absorption obtenues par Fuller et Hayward ‘) (F.H.) et Axel, Miller, Schuhl, Tames et Tzara (A.M.S.T.T.) u).

form NBS-418

(RKV. 7-1 4-64) USCOMM-OC JS0I0-P84 PH0T0NUCLEAR DATA SHEET 507

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
M. Langevin, J. M. Loiseaux et J. M-. Maison

Nucl . Phys. 114-124 (1964)

EL EM. SVM. A

Er 68

METHOD

Bremsstrahlung 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 17.5-20 MeV

Ho**

1.1

Om 0.27 a» O.A3 J

•<

23%

Fig. 8. Repartitions angulaires du rayonnement diffuse obtenues pour le terbium, I’holmium, Terbium et le tantale dans les zones d’energie 1 1.5-14 MeV, 14-17.5 MeV et 17.5-20 MeV.

form NBS-418 (REV. 7. 14-64) USC OMM.OC 26010-P64 PH0T0NUCLEAR DATA SHEET 508U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
method

R. Bergere, H. Beil, P. Carlos and A. Nucl. Phys. A133 . 417 (1969)

Veyssiere

ELEM. SYM. A z

Er

REF. NO.

63

69 Be 6 egf

REACTION RESULT EXCITATION SOURCE DETECTOR

ENERGY TYPE RANGE TYPE RANGE

ANGLE

G,N ABX 7-21 D 7-28 MODI

4PI

ABX 13-27 D 7-28 MODI

4PI

G,3N ABX 23-28 D 7-28 MODI

4PI

x = fraction of total cross section resulting in a direct neutron f

n^ = fraction of neutrons emitted by direct effect at an energy where all the evaporation

neutrons go to (y?2n) cross section = x/(2-x)

Tableau 3 Moments quadrupolaires intrinsiques

Cible % isotopes aib ex /?,ex PAWEt)] Go Q'o

ex (b)

ssl 100 %

,i7

I 0.85 0.172 -2.3 ±0.4

...Ce 88.5% 140Ce 1.104

11.1 %

141Ce 0.118 t<Sm 15 %

,47Sm

11.2% 14, Sm 1

0.158

13.8% ,4’Sm

7.5 %

l50Sm - 0.219

0.190

4.5 ±0.4

3.53 26.6% 15J Sm 0.304 5.93 22.5% 134Sm ' 0.351 ' 6.58 ttEr 33.4% “'•Er 0.341 7.60 22.9% “7 Er

27.1 % “*Er 1.314 0.288

0.339 6.96 ±0.4

7.80

7.60 14.9% 170 Er 0.329 7.45 7|LU 97.4% 17, Lu 1.282 n.262 6.95 ±0.3 7.20

Tableau 5 Valeurs de la temperature nucleaire et du paramitre a dc densitc dcs niveaux

X 9 (MeV) E'y—En (MeV) a (MeV -1

) a (MeV - 1 ) a" (MeV* 1 )

I 0.05 ±0.005 0.03 1.0.03 1.30 ±0.20 10 6 ±2.5 I0±3 I0±2

14®Cc 0.21 ±0.05 0.1 2 ±0.03 1.05 ±0.20 10 9±3.5 7-3

l4,Cc 0.8 ±0.20 6 9 ±4 8±3

Sm 0.1 8 ±0.04 0. 10±0.03

Er 0.20±0.05 0.11 ±0.03 (12 ±4)

Lu 0.26 ±0.06 0.1 5 ±0.03 0.85 ±0.1 9 12.5±2.5 15=3

FORM NBS-418

IR«V. 7-1 4. «4) USC OMM.OC 2S010.PS4 PHOTONUCLEAR DATA SHEET 509

U.S. DEPARTMENT OF COMMERCE

NATIONAL. BUR EAU OF STANDARDS
Tableau 4

Regies de sommc

Noyau ciblc <To n'n NZ <r0 A (7 qA ff-. , A “5 "-i n. l A~i

(elements nature Is) (MeV • b) (MeV b) 0.06 —

A 0.06 NZ 0.06 NZ (mb) (mb • MeV’ 1 )

3J I 2.02 0.14 2.30±0.I2 1.85 1.09 ±0.07 l.24±0.07 129±0. 10 0.20 ;n0.02 8.6 —0.6 !l o N

r- ri 5mCc 2.13 .0.15 2.53 ±0.1

3

2.04 1.05 ±0.07 1.24 ±0.07 140±0.12 0.19 ±0.02 9.5 — 0.6 2.5 —0.2 aiSm

.

2.48 .0.17 2.92 ±0.14 2.18 I.14±0.07 1.34 ±0.07 167 ±0. 14 0.21 — 0.02 1 1. 8 ±0.8 2.75-0.2

»»Er 2.70 : 0.19 3.04 ±0.1

6

2.42 1.1 2 ±0.07 1.26 ±0.07 186±0. 15 0.20 ±0.02 13.6 j; l 2.7 -0.2

71 Lu 2.65 ' 0.18 2.9$ ±0.16 2.53 1.05 ±0.07 1.1 7 ±0.07 182 ±0.15 0.1 85 ±0.02 12.9^: 1 2.35 ±0.2

valeur moyenne

pour ces 5 corps 1.09 ±0.07 1.25 ±0.07 0.20 ±0.02 2.6 —0.2

t
REF. R.F. Barrett, J.R. Birkelund, B.J. Thomas, K.S. Lam, and H.H.

Nucl. Phys. A210, 355 (1973)

methoo

Thies

C.M . 3 r .VI.

Er 63

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. 15. Ratio a,*,!ar versus atomic number A. Here a„M is the level density parameter taken rrom

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

(REV. 7. 1 4- *4) USCOMM-OC 2«010-P«4 PHOTONUCLEAR DATA SHEET 511

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Table 3 (continued)

Target ff

(residual nucleus) *)

Goodness

of fit b

) no with

p.c. p.c.

£.(24) T

(MeV)c

) (MeV) 4

)

a. (MeV- 1 )*)

aob* (MeV-«)0

a,*Ja9

Ba 75 1% F 1.16 l6.5-l3SBa l5.39-I36Ba 0.93 77 2%

78 7%

79 8%

80 11%

81 71%

La 80 100% F F 1.25 0.72 15.5-l3 *La 13.76-l39La 0.89 Ce 81 89% F G 1.24 0.70 17.0-* 39Ce 17.8 -l4, Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-l4OPr 17.05-‘*lPr 1.00 Tb*) 93 100% 1.15 19.3-li *Tb 21.85-s#0Tb 1.14 Dy *) 93 2% 1.06 20.9-“*- , Dy 21.9 -lMDy 1.05 94 19%

95 25%

96 25%

97 28%

Ho 97 100% P G 1.06 0.56 21.4-‘**Ho 20.66-l44Ho 0.97 Er 4

) 95 2% 1.11 19.2-l “Er 21.9 -‘••Er 1.14 97 33%

98 23%

99 27%

101 13%

Tm 1) 99 100% 1.03 24.0-t6 *Tm 22.58—l7 °Tm 0.94 Ta 107 100% G 1.00 0.49 26.0-l, °Ta 21.2 -l,lTa 0.82 W 107 26% G F 0.98 0.50 27.0-ll3W 23.0 -l,3W 0.85 108 14%

109 31%

111 28%

Au 117 100% G 1.19 17.5-l9*Au 20.24—1 9,Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5_io«pb 10.1 -307Pb -1.35 (Z * 82) 124 23%

125 32%

Bi 125 100% F 1.65 1.03 9.0-*°*Bi 13.8 -,l0Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (7, n) experiments.

*) These give an assessment of the goodness of fit of a calculated £a versus Eo curve to the observed data, using the Fermi gas level density formula both without and with pairing corrections.

*) Bremsstrahlung photoneutron mean energies £a for peak bremsstrahlung energy Eo = 24 MeV.

4

) Nuclear temperature from fit with constant-temperature formula.

•) Level density parameter a9 derived from the present (7, 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. *• *). •) Measurements of £a (£„) for these nuclei were made only for E0

=” 21, 23 and 24 MeV.

512
Er

A=166

513

Er

A=1 66
1 514
REF. F. R. Metzger and V. K. Rasmussen

Phys. Rev. C8 , 1099 (1973)

EL EM. SYM.

Er 166 68

METHOO REF. NO. 73 Me k hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE BANGE

$ G.G LFT 2 C 2 SCD-D DST

1.66, 1.81 MEV LEVS

In addition to the previously known 1* states of t,(Er at 1663 and 1830 keV, levels at 1812 * 1 keV (lwEr), 1786* 1 keV (l-Er), and 1824* 1 keV (lT#Er) have been excited using electron bremsstrahlung. Based on the observed angular distributions of the scattered photons, all three previously unknown levels were found to have spin 1. Linear polarization measure*

raents using a two-slab Ge(Ll) potaximeter led to negative parity assignments for the 1786- aad 1824-keV levels but were inconclusive with respect to the less strongly excited 1812-keV

level. Below 1.9 MeV, the 1663-, 1786- , and 1824-keV levels are the dominant £1 excitations In their respective isotopes, the partial widths of their ground-state transitions being

r,-32*5, 46*5. and 30*3 meV. The £<£1;1-— g.s.)/®(£ljl"— 2f) ratios of 0.52* 0.02, 0.51* 0.02, and 0.53 * 0.02 differ considerably from the ratio 1.31* 0.11 for die 1812-ksV

level and the reported ratio 0.22 for the 1830-keV 1“ state and are very close to the Alaga

value of 0.50 for X-0" levels.

TABLE H. Comparison of the experimental ratios of

the counting rates In the 98 and 127* scattering geometries with the ratios expected for different values of the spins of the excited states.

hf<127*)/W(98*)

£|rrtf Theory

Isotope QceV) Experiment Spin 1 Spin 2

«*Er 1663 1.39*0.11 • • >“Er 1812 1.40*0.17

l 1.36 0.49 “Er 1786 1,38*0.07 ‘«Er 1824 1.33*0.09

TABLE m. Results of the measurements using the two-slab Ge(Li) polarimeter. Nv and N± represent the counting rates in the full energy peaks with the slabs

parallel and perpendicular to the scattering plane, respectively.

Isotopa AM

(keV)

Transition By (keV) Wn-ATJ/Wa+tfJ

<%>

«*Er 1662 r—o* 1662 * 7. 4*4.

9

1"— 2* 1582 + 3. 7*3.4

1812 1—0* 1812 -5.6*10.0 >«Er 1786 1 —<J* 1786 + 16.7*7.4 1—2* 1706 -1.4 *4.3 '"Er 1824 1 — 0* 1824 + 9.8 *4.8 1-2* 1745 0.0*3.1

TABUS IV. Widths and branching ratios of the 1<( ' >n* lnEr levels. The direct results of the NRF scattering experi- ments are listed in column 5.

Isotope

Level

(keV) r,/r, B (£1; 1~— g.S.)/B (£1; l”-2t>

r»J/r

(meV) r,/r»

r, (meV)

«*Er 1663 0.60* 0.02 b 0.52*0.02 12.0*1.8 0.38*0.01 32*5

1812 1.50*0.12 1.31*0.11® 4.8 *0.6 0.60*0.02 8*1

1830 *0.33 d *0.22 ... *0.25 2.4

***Er 1786 0.59*0.02 0.51*0.02 17.0*1.7 0.37*0.01 46*5

mEr 1824 0.61*0.02 0.53*0.02 11.4*1.1 0.38*0.01 * 30*3

‘Assuming the absence of branching to levels above the 2f state. ^ In good agreement with the value of 0.61 adopted in Ref. 18.

• c This might be the ratio of £<Ml)'s rather thanB (£l)’s since the polarization experiment was not conclusive.

4 From the decay of 1(lHo; see Ref. 18. ^Nuclear Data Sheets , 1959-1965, compiled by the Nuclear Data Group

(Academic, New York, 1966). 515

. DEPARTMENT OF COMMERCE

3NAL BUREAU OF STANDARDS
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. SYM. A Z

Er 166 68

REF. NO.

74 Go 4 hmg

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

angle TYPE RANGE type range

G.XN ABX 8- 21 C 8- 21 BF3-I 4PI

a(y» 2n) measured but not given.

Fig. 1. Cross section Cy of

Er lss

; the light and dark

circles correspond to two independent series of experimental data. Curves £ and b were obtained by the regularization method (see the text)

and are shown shifted relative

to the ordinate axis.

Note: (y,sn) cross section

determined from o(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

Er 166

Ilf 178

MeV-b

•1.05 z 0.3

3. 1 G t 0.3

0.33

0.2C

g.. b

7.76 6.72

nuclei. correspondin^to the “brined values of f. ' th° the

form N3S-418

(REV. 7«1 4* 64) USCOMM-OC 26010-P64 PHOTONUCLEAR DATA SHEET 516

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
T. Cooper, W. Bertozzi, J. Heisenberg, S. Kowalski

W. Turchinetz, C. Williamson, L. Cardman, S. Fivozinsky,

J. Lightbody, Jr., and S. Penner

Phys. Rev. C13 , 1083 (1976)

EL EM. SYM.

Er 166 68

method REF. NO. 76 Co 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

E,E/ FMF 1 , 1 34-111 MAG-D DST

FIG. 5. Measured form factors for the elastic (0*) and

the inelastic 0.081-MeV (2*) and 0.265-MeV (4*) states

in luEr. The solid line represents the quoted best fit. Carre B gives the result for the 2

* state using a de- formed Fermi distribution.

LEVELS .081,. 265

FIG. 9. Ratio of the cross sections observed for exciting the 0.786-MeV (2*') y-vibrational level to that for

exciting the 0.081-MeV (2*) state. The best fit curves

differ only in the sign of the of the p 4 component of the charge distribution, since the sign is not determined by

form factor fits to the ground state rotational band data.

(over)

form N3S-418

IR EV. 7-1 4.841 USC OMM*N 6S*OC PHOTONUCLEAR DATA SHEET 517

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
TABLE IV. Cross sections of tMEr.

Elastic

Energy

(MeV)

Angle

(deg)

7rff (fm* 1

)

da

d£l txp (mb)

da

Dentil imb)

2* da ^up

(mb)

4* da

dOexp

(mb)

2*y vibrational da

dQ up

(mb)

34.65 109.95 0.495 0.948 xio * 4% 0.933X10 0.964xl0*‘± 6% o o e 0.258xio°** 22%

39.64 127.81 0.588 0.146x10 * 5% 0.142xio 0.433X10*** 4% ... 0.681 x io° *± 13%

44.51 109.95 0.577 0.241 xio i 5% 0.237x10 0.761 xi0*‘* 3% . .o 0.163X10***10%

54.88 109.95 0.663 0.588 * 4% 0.566 0.484x10*** 3% 0.231x10° **49% 0.121*10*** 2%

64.82 110.16 0.746 0.170 * 3% 0.177 0:214X10*** 2% 0.246x10***17% 0.735X10’** 3%

75.99 110.13 0.831 0.886 xio-1 * 7% 0.850 x 10*

0.754*10°** 3% 0.106X10***15% 0.275X10°’* 6%

84.17 110.01 0.906 0.521 xi0*‘± 5% 0.512 xio' 1 0.240 x 10* ** 7% 0.513x10***57% 0.124X10***18%

95.23 110.03 0.999- 0.235 xio* 1 ± 3% 0.239 x 10* 1 0.151 xiO* l ± 4% 0.303x10***30% 0.444X10*** 13%

95.00 127.81 1.092 0.497 xio" 1 * 3% 0.485 x 10* 1 0.937X10*** 4% 0.859x10***39% 0.139X10*** 2%

110.20 147.24 1.315 0.165 xl0**± 10% 0.172 x 10* s 0.977x10***15% 0.483X10***13% 0.423X10***11%

TABLE DC. Transition charge parameters of 1MEr and n,Yb.

»«Er lT,Yb

Units Po Pi Pi Pi Pi Pi

fm 6.1610 5. 3632 5.3556 6.3306 6.0151 . 5.1866

t fm 0.4872 0.5598 0.7271 0.4868 0.5188 0.9093

fii 0.3266 0.3503 0.3325 0.3100 0.3346 0.3874

*4 0.0 0.0 0.0199 -0.054 -0.054 -0.0875

f>i -0.0180 -0.0180 —0.0180 * -0.006 -0.006 -0.006 *

rtns radius „fm 5.2380 b 5.3150* B(E2) •v 5.670 4 5.350* B(EA) 0.0919 0.0092 xVfreedom 0.42 2.62 2.63 1.13 1.23 3.14 Transition fm 5.2380 6.9088 8.4777 5.3150 6.8689 6.6962 radius

1 Reference 3.

b Interpolated value from nearest neighbors.

e Reference 23.

d Reference 25.

• Reference 24. 3 d.L. Hendrie, Phys . Lett.

36 , 571 (1973); ibid, et al.

Phys. Lett. 26B , 127 (1968)

.

23

A. Thompson (private comraun.)

Eidgenoessische TH Zuerich,

1974 (unpublished)

.

24

R.O. Sayer et al., Phys. Rev.

Cl, 1525 (1970)

.

25

P.H. Stelson, Nucl. Data Al,

21 (1965) .

•

518
REF. B.I. Goryachev, Yu.V. Kuznetsov, V.N. Orlin, N.A. Pzhidaeva,

V.G. Shevchenko

Yad. Fiz. 23, 1145 (1976)

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

EL EM. SYM.

Er 166 68

METHOD REF. NO.

76 Go 4 hmg

REACTION

\ RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TYPE range TYPE RANGE

G.XN ABX 8- 23 C UKN BF3-I 4PI

G.2N ABX 15- 21 c UKN - SCI-I 4PI

FIG. 1. Photoneutron production cross section a„ obtained

for toHo (a) and for 1MEr <b>. The hollow and solid circles correspond to two independent series of data. The solid curves show the (y, In) cross sections calculated from the data of a statistical experiment by the regularization method. 1121 The circles near the curves give the same cross sections calculated from the formula <r„(l -f(E,a)).

FIG. 6. Cross section <rr for lss Er: The- hollow and solid circles correspond to two independent series of experimental

data. Curves 1 and 2 were obtained by the regularization method and are shown shifted along the ordinate axis. The

heavy vertical bars show the dipole transition spectrum calculated by means of a version of the dynamic collective model

based on a rotational-vibrational model of surface oscillations.

TABLE 4. Parameters of curve fitted to the cross

section <tt in lat Er.

Number of MOOUMI

Sr M.V «k, mb rp M«V •

trr

..r.

1 1128 210 163 1.00 2 13.44 34 0.94*017 0.06=0.wU 3 14.77 161 125=0.15 0.6o±0.0S 4 15.93 112 0.93=0.08 0.19=0.01 5 16.98 89 1.08=0.12 0.17=0.01 0 17.7 114 4.67=0.44 0.93=0.01 7 162 62 035±0.15 0.06=0.02

y-792. /—75. £,-l0.7M.V. £—20.1 M.V

TABLE 1. Level-density parameters

a, MeV‘ a, MeV1

Nucleus Present work Other studies Nucleus Present work Other studies

i»Tb

'«*Ho 4. 2 *1.5

7.7““

3.1““

•«Er

‘“Hf 6.1=2.

5

17.7*7.3 a““

(over)

FORM N3S-418

(REV. 7.14-SAI USCOMM-NBS-OC PHOTONUCLEAR DATA SHEET 519

U.S. DEPARTMENT OF COMMERCE

NATIONAL SUREAUOF STANDARDS
TABLE 2. Parameters of fitted curves UTM

E. tuv mb | r.MtV E MtV c.. mb r . MtV or:* r

'“Th 1128 192 191=0.09 13.78 293 3.42=0.13 •isa=an

12.il 213 131-0,03 13.93 -82 3.01=60/ *

“lie 1121 204 174=0.11 1(123 300 3.07=0.17 3.02=0.09 3.11=627 1147 223 32(1=0.06 16.40 293

1132 191 171=0.14 13.99 31* 7.67=0.10 3.38=0.33 1130 214 3.43=0.08 16223 "

"Ill 11G8

1188

IGC 216 138=10 322=611

13.03 13.46

281 237

60./=0,27 3.87=0-3)

4.00s 1. TO

*»

E. MeV

1973 2166

17G.0

200.8

1333

101.7

1711

173.7

3798

94

93

8990

10.4 10.4

10.4 10.4

10.7 10.7

10.8 10.8

Note. The <ower values of the parameters in eacn eoiumn were found with the requirement o,r, :ff, T, 2:1.

McV

20.8 20.6

20.6

20.6

20.6

20.6

20.0 210

TABLE 3. Static deformation 0 and intrinsic quadrupole moment Qt

.

Other phpt—iirtm uaatioa

experiments of nuctei Nudns

1 0» b 0 0. b 6. b

n*n> 0.29 837 ['M

7.07 ("1 629 633*0.6 0.32 TXi-l

029 66 (*M

'“Ho 0.29 7.01 I'M 632 7.73=08 630 7-14 780 CM'

021 73 I'M “Er 028 696 PM

030 739=66 631 7.6 I'M

>"Hf 020 694=66 679 (»1

TABLE 6. Integrated cross sections.

Nucleus

<T. MtV-b

- mb aV« MaV-b A

11'

l>rTli .129 1.47 210 0243 13.9 641-10-*

'“llo t.GO 131 218 0241 161 32.-. 10-* '“Er 2.56 1.48 210 0.237 161 .’•21 10'* "Ilf 108 120 11* 6198 148 2.03- 10-*

A—raft 1.41=03 0.23=0.04 .11 l0-**610-«

12

15

E 16

! 18

t 19

E 2°. 21

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

,

Eng. transl. in Sov. Mathematic s-Doklady

.

185, 1576 (1969)

A133, 417 (1969)

.

i. 30, 613 (1962) . 157, 1109 (1967)

A121, 463 (1968) .

22

O.V. Bogdankevich et al., Zh. Eksp.Teor .Fiz . 42_,

1502 (1962); Sov. Phys. JETP 15 , 1044 (1962).

B.S. Dzhelepov in Struktura slozhynkh yader

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

520
REF. P. R. Metzger

Phys. Rev. C13, 626 (1976)

METHOD

ELEM. SYM.

Er 166

REF. NO. 76 Me 4

68

hmg

REACTION EXCITATION ENERGY

SOURCE OETECTOR

RESULT TYPE RANGE TYPE RANGE ANGLE

G,G LPT 1- 4 C 2-4 SCD-D DST

(1.66 - 3.19)

13 STATES, 1.66-3.19

Some 40 stats in 1 ‘* l4*- I70Er, most 0f them previously unknown, have been excited using bremsstrahlung with £ 4.2 MeV endpoint energy. For all but three of these levels, the angular distribution of the resonantly

scattered radiation favors the assignment of spin 1. For some of the strongly excited levels, linear polarization measurements have been performed. They indicate that these levels have positive parity. The branching ratios further characterize them as K = 1 excitations.

TABLE n. Properties of levels excited in ,cs Er with photons of S3.3 MeV energy.

•Etrrtl (MeV) /* r„Vr (meV) ayn* r0 (meV) .

1.663 b 1" 12.0*0.8 0.33*0.01 32*5

1.812 b l* e 4.8* 0.6 0.60*0.02 8*1

l.S30 b 1“ -0.25 2.4 2.201 1«- 5.4*0.

9

0.36 = 0.03 15*3

2.464 (1) 3.9*0.

8

0.63*0.08 6*2

2.524 (1) 8.3* 1.7 0.71*0.10 12*3

2.601 (1) 15.4*1.6 0.62=0.10 25*5

2.679 (1) 9.1* 1.9 0.56* 0.08 d 16*5

2.768 (1) 5.8* 1.1 0.46*0.09 13*4

2.782 (2) 2.2* 0.5 0.7 *0.2 3*1

2.811 1 18.6*2.3 0.32*0.04 58*11

3.141 1 35.0*4.0 0.72*0.05 49*7

3.193 1 23.8*2.7 0.71*0.05 33*5

‘This Is really T0 /( r^I^) since, in addition to the ground state transitions, only the cascade y rays to the

first 2* state at 80.6 keV could be observed in the pres- _ ence of the nonresonant background, which increased

rapidly with decreasing y energy.

b See Ref. 1. c See Ref. 9.

** (Combining our value Tj/r = 0.60* 0.15 with the ratio 0.55*0.09 reported in Ref. 11.)

^F.R. Metzger et al., Phys. Rev. C8 , 1099

(1973)

.

9F. R. Metzger et al.. Bull. Am. Phys.

Soc. 18, 1386 (1973).

U

S . B . Burson et al . , Phys . Rev . 158 , 1161 (1967) .

FORM N8S-418

(REV. 7-1 4-«A> USC OMM-N BS-OC PHOTONUCLEAR DATA SHEET 521

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
REF.

METHOD

J.J. Murphy, II, D.M. Skopik, J. Asai

,

Phys. Rev. C 18, 736 (1978)

and J. Uegaki

EL EM. SYM.

Er 166 68

REF. NO. 78 Mu 9 hg

REACTION RESULT EXCITATION ENERGY

SOURCE "* OETECTOR

ANGLE

TYPE RANGE TYPE range

E,A ABX 7-100 D 100 MAG-D DST

a particles from the electrodisintegration of seven nuclei with Z between 29 and 79 have been observed. Energy spectra at SO* in the laboratory for six nuclei and angular disthbtions for'five nuclei are reported. The cross sections exhibit a broad peak whose magnitude decreases with increasing Z; the energy of the p—It 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. Murphy, II, H.J. Gehrhardt, and

D.M. Skopik, Nucl . Phys. A277 , 69 (1977).

form N3S-418

(R E V. 7*1 4-04) use OMM-N as-o c

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. L.

z

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. Over

PHOTONUCLEAR DATA SHEET 522

T OF COMMERCE

O OF ST ANOAROS
(nb/MeV

sr)

FIG. 7. . Angular distributions for erbium. The corn- meats made for Fig. S apply here.

523
A.M. Nathan, R. Moreh

Phys. Lett. 91_B, 38 (1980)

REF. EL EM. SYM. A Z

ER 166 68

METHOD REF. NO.

80 Na 1 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TVPC RANGE TYPE RANGE

G,G/ SPC. 16 D 14-17 MAG-0 DST

(16.4) (14.4-16.6)

Quasi- monochromatic photons in the range Ey = 14.4—16.6 MeV have been used to study inelastic scattering to the 2* , 7-vibrational band head in 164

Er. The results for transitions to this branch are drastically smaller (by a factor » 3—5)

than the predictions of the dynamic collective model (DCM).

BRAN RATIO, VIBR ELAS

Fig. 1. Spectra at 109" of 16.4 MeV tagged photons scattered from 1 4*> 14®Er measured with a 24 X 30 cm2 Nal detector. This spectrum was obtained by merging separate spectra of

energies 16.2, 16.4 and 16.6 MeV. The’solid line is the shape

of the detector response to elastically scattered photons, which was obtained with a 209 Bi target The dashed line shows

the calculated spectrum obtained by adding a 10% inelastic branch (to the 785 keV level) to the pure elastic peak.

Fig. 2. Measured and calculated branching ratios of the vibrational inelastic to the elastic plus rotational Inelastic cross

sections. The closed (open) circles are data taken at 90°

(109°). The double circle represents the measured average branching ratio over all energies. The solid (dashed) lines, A

and B, are the results obtained at 90° (109°) using the parameters given in table 1 and the DCM code of Arenhovel [ 1 2

1

FORM MBS-418

(RCV. 7.14.14) USC OMM-N 6S*OC PHOTOMUCLEAR DATA SHEET 524

U.S. DEPARTMENT OF COMMERCE

NATIONAL IURIAUOF STANOAROS
Er

A=1 67

C.U cm. J I . K. N. Geller, J. Halpern, and E. G. Muirhead

Phys. Rev. _U8, 1302-12 (i960)

Er 167

ItTHOO

Betatron; neutron threshold; ion chamber

REP. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE oetector

ANGLE

TYPI 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 measurements with values predicted from moss data and reaction energies. All energies are expressed in the ccntcr-of-moss system in Mev.

KrnclitHI No. runs Present results Other results Method Reference

Er‘"(7^)Er>“ 6.64 ±0.08(6.56) 6.45 ±0.06 mass data q

* W. H. Johnson. )r» and V. B. Bhanot. Phys. Rev. 107, 6 (1937).

Table EL Comparison of measured threshold energies with neutron binding energies predicted by m»« data

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

Reaction A/• Observed threshold Mass data Q value Ea—Q Excited state energy Cr*(7^)Cr« 7/2 12.18±0.14 12.053±0.004b 0.13±0.14

Y"(y,»«)Y“ 7/2

' U.59±0.08 11.53 ±0.40* 0.06±0.41 0.387-* Inu*(7^s)In1M 7/2 9.22±0.03 9.35 ±0.43* —0.13±0.43 0.191* Ce10

(7,»)Ce*« (7/2)* 7.24±0.07 6.97 ±0.07' " 0.27±0.10 . . . NdIU(7,»)Nd1** 7/2 6.38±0.16 5.97 ±0.19' 0.41±0.25 0.690* Sml<, (7,n)Smu• 7/2 6.45±0.16 5.87 ±0.28' 0.58 ±0.33 0.562*

Er‘*7 (7,»»)Er1M 7/2 6.65±0.08 6.45 ±0.06* 0.20±0.10 0.081* HflT7 (7,»)HflT* 7/2 6.69±0.03 6.28 ±0.06* 0.64±0.07 0.088* Hf"*(y,n)IIflT* 9/2 6.31 ±0.07 6.17 ±0.06* 0.14±0.09 0.093* HP«(7^»)HP» 9/2 7.85±0.11 7.32 ±0.06* 0.53±0.13 0.375*

• D. Stromlnger, J. M. Hollander, and G. T. Seaborg, Rev*. Modern Phy*. 30. 385 (1938). *C. F. Glete and J. L. Benson. Phys. Rev. 110, 712 (1938).

• Henry E. Duckworth. Man Sptctroacopy (Cambridge University Press. Hew York. 1938). p. 177.

• S. Dzelepov and L. K. Peker. Atomic Energy of Canada Limited Report Tr. AECL-437 (unpublished).

• The discrepancy in the case of Ce1** predicts a ground-state spin for Cela of 0. since the spin of Celu is known to be 7/2.

i W. H. Johnson. Jr., and A. O. Nier. Phys. Rev. 105. 1014 (1937).

s W. H. Johnson. Jr., and V. B. Bhanot. Phys. Rev. 107, 6 (1937).

rORU NBS-418 mrv, 7. 14.641 nMM*or aeoin. res PHOTONUCLEAR DATA SHEET 527

U.S. DEPARTMENT OF COMMERCE

NATIONAL, suncauo*
. * -
Er

A=168

V'

Er

A=168

[529

Er

A=1 68
- . ' . •• ..

-

' - r w.-v ,

:

'

- &* . -

' •='. -•••••- -. 1 "

. :

. '' • -- • - •

1 -V - . >•

.. -,

• •

. .

• - •• -

; . . ; ;;

- V " ... , - - •

....

•. / ... •

• •••

' •’ *

•>; V

. ;

<r-.- .. ,;v

-;r i •

•

[530
REF.

MCTHOO

F. R. Metzger and V. K. Rasmussen

Phys. Rev. C8, 1099 (1973)

ELEM. SYM.

Er

REF. NO.

168 68

73 Me 4 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

Type range TYPE RANGE

$ G,G LIT 2 C 2 SGD-D DST

1.786 MEV LEVEL

In addition to the previously known 1” states of 1,4Er at 1663 and 1830 keV, levels at 1812 * 1 keV <‘“Er), 1786* 1 keV (‘“Er), and 1824* 1 keV <l,#Er) have been excited using electron bremsstrahlung. Based on the observed angular distributions of the scattered photons, all three previously unknown levels were found to have spin 1. Linear polarization measure- ments using a two-slab Ge(Ll) polarlmeter led to negative parity assignments for the 1786- and 1824-keV levels but were inconclusive with respect to the less strongly excited 1812-ksV

leveL Below 1.9 MeV, the 1663-, 1786-, and 1824-keV levels are the dominant El excitations In their respective Isotopes, die partial widths of their ground-state transitions being rt *32*5. 46* 5, and 30*3 meV. The £(£1;1“— g.a.)/»(£l;l"— 2f) ratios of 0.52*0.02,

0.51*0.02, and 0.53 * 0.02 differ considerably from the ratio 1.31*0.11 for the 1812-keV

level and the reported ratio 0.22 for the 1830-keV 1" state and are very close to the Alaga

value of 0.30 for A*0~ levels

TABLE m. Results of the measurements using the two-slab GefLl) polarlmeter. Nt andNL represent the counting rates in the full energy peaks with the slabs

parallel and perpendicular to the scattering plane, respectively.

Isotope £lml

(keV)

Transition /,-// Er (keV) (%)

"*Er 1662 r—o* 1662 + 7. 4*4.

9

r—2* 1582 +3.7 *3.4

1812 1—0* 1812 -5.6*10.0 "•Er 1786 1—0* 1786 + 16.7*7.4 l—

r

1706 -1.4 *4.3

'"Er 1824 1-0* 1824 + 9.8*4.8 1—2* 1745 0.0*3.1

TABLE II. Comparison of the experimental ratios of the counting rates in the 98 and 127* scattering geometries with the ratios expected for different values of the spins of the excited states.

Isotope

Star* (keV)

W(127*)/5fr (98*) Theory

Experiment Spin 1 Spin 2

'“Er 1663 1.39*0.11 '“Er 1812 1.40*0.17 '“Er 1786 1.38*0.07 1.36 0.49. . '"Er 1824 1.33*0.09

TABLE IV. Widths and branching ratios of the »«.»». >TM£r levels. The direct results of the NRF scattering experi- ments are listed In column 5.

Isotope Level(keV) r,/rt B (El-. 1“- g.s.)/B (£1; 1--2|)

r,7r

(meV) r9/r«

r« (meV)

‘“Er 1663 0.60* 0.02 b 0.52*0.02 12.0*1.8 0.38*0.01 32*5

1812 1.50*0.12 1.31* 0.11 e 4.8 *0.6 0.60*0.02 8*1

1830 *0.33 d *0.22 • • • *0.25 2.4 '«Er 1786 0.59*0.02 0.51*0.02 17.0*1.7 0.37*0.01 46*5

'"Er 1824 0.61*0.02 0.53*0.02 11.4*1.1 0.38*0.01 30*3

* Assuming the absence of branching to levels above the 2? state.

b In good agreement with the value of 0.61 adopted In Ref. 18.

c This might be the ratio of B (Mil’s rather thanR (£l)’s since the polarization experiment was not conclusive.

4 From die decay of wlHo; see Ref. 18. ________

FO T 7**11* Nuclear Data Sheets , 1959-1965, compiled by the Nuclear Data Group

uscomm-nss-oc (Academic, New York, 1966). 531
REP.

METHOD

F. R. Metzger

Phys. Rev. C13 , 626 (1976)

EL EM. SYM.

Er 168 68

REF. NO. 76 Me 4 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE oetector

angle TYPE RANGE TYPE RANGE

G,G LFT 1- 4 C I- 5 SCD-D DST

(1.786-3.481)

20 STATES, 1.79-3.48

Some 40 states in ’“•14*'1T0Er, most of them previously unknown, have been excited using bremsstrahlung with 2 4.2 MeV endpoint energy. For all but three of these levels, the angular distribution of the resonantly

scattered radiation favors the assignment of spin 1. For some of the strongly excited levels, linear polarization measurements have been performed. They indicate that these levels have positive parity. The branching ratios further characterize them as K = 1 excitations.

TABLE III. Properties of levels excited In l “Er with photons of £3.5 MeV energy.

Elrnt (MeV) r r„J /T (meV) ayn 1 r0 (meV)

1.786 b 1” 17.0±1.7 0.37*0.01 46*5

1.935 (1) 1.5* 0.4 ~1 -1.5

(2.136) a, 2) 2.1±0.6 C 0.62*0.15 3.441.3

2.363 a) 3. 1*0.

5

0. 8*0.1 4*1

2.417 a) 3.3*0.

9

0.36*0.07 9*3

2.495 a> 6. 5*0.

8

0.66*0.06 10*2

2.676 a) 10.4*1.1 0.76*0.05 14*2

2.728 a) 7.6* 1.0 0.50*0.05 15*3

2.792 i 12.0*1.2 0.9*0.

1

13*2

2.798 i 13.7*1.4 0. 9*0.1 15*3

2.828 (i) 4. 3*0.

9

0.62*0.10 7*2

2.849 a) 5.1* 1.5 0.70*0.12 7*3

2.856 (i) 3.3* 1.1 0.35*0.07 10*4

2.946 (i) 4. 6*1.2 0.33*0.05 12*4

3.358 i 30.7*4.0 0.61*0.04 50*8

3.391 !<) 78*7 0.69*0.03 113*12

3.410 a) 16.6*2.2 0.54*0.05 31*6

3.458 i 37*5 - 0.63*0.06 59*10

3.469 (i) 23*6 ? 3.481 a) 17*5 0.42*0.07 41*14

‘This Is really r0 /(r( *r,) since, in addition to the ground state transition, only the cascade transitions to the first 2* state at 79.8 keV could be observed.

b See Ref. I.

e (Assuming spin 1.)

^F. R. Metzger et al. f Phys. Rev. C8 , 1099 (1973).

form N3S-418

(RCV. 7.14-64I USC OMM-NBS-OC

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF 3TANOAROS PHOTONUCLEAR DATA SHEET 532
",er G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V.A. Tyutin

JETP Lett. 28, 157 (1978)

Pis'ma Zh. Eksp. Teor. Fiz. 28, 168 (1978)

METHOO 1—

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYPE WANGS TYPE WANGS G.MU-T ABX THR-30 C UKN NAI-D 4PI

The absorption method is used to measure the total photoabsorption cross

section curves for deformed l54Sm, l36Gd, 14*Er,' n4Yb, IMW, and ,86W

nuclei in the region of the £1 pant resonance. The behavior of the resonance widths for nuclei in the interval ^4 = 1S3 to 186 is discussed. PACS numbers: 24.30.Cz, 25.20. -t-y, 27.70. +q

TABLE I.

ri E 2 *2 r2 r P o

L /0.06— " L A

Nucleus MeV mb MeV MeV mb MeV MeV b -

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

156Gd 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

l7*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

184W 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^ 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% — —

“

EL CM. SYM. A

Er 168

REF. NO.78 Gu 7

68

ha

(over)

FORM M8S*418

IRCV. 7-I4.44I USC OMM-M B3*OC PHOTONUCLEAR DATA SHEET 533

U.S. DEPARTMENT OF COMMERCF

NATIONAL IURCAU OF ST ANOAROS
FIG. 3. Experimental values of J/" = f — — £,) in the region of deformed nuclei with A = 1 53-186: 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 0.13 MeV upward and downward, respectively. The (£, +• £,) curve was obtained from the J/~ curve after introduction of corrections in the interval A = 175-186.

534
«er. G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu. Merkulov,

G.V. Solodukhov, V. A. Tyutin

Nucl . Phys. A351 , 257 (1981)

EL EM. SYM.

Er

A

168

z

68

METHOD

*•

REF. NO.

81 Gu. 2 hg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

TYRE HANOI ANGLE

G,MU-T ABX THR-20 C 27 NAI-D 4PI

Abstract: The curves of the total gamma-absorption cross sections (<r lu< ) in the El giant resonance energy

range for the nuclei ,wSm. ”"Gd. '"‘Ho. "**Er. , ' 4Yb. ‘’"Hf, 1,0 Hf. '"‘Ta, lS2 W. ,,'*W. '**W

and 1,4 Au have been measured using the absorption method. Parameters of the Lorentz curves

fitting the measured cross sections are given. Quadrupole moments (Qa) and nuclear deformation

parameters ( III were obtained. For deformed nuclei in the *- 155 < -I < ~ ISO region a violation of the correlation between

giant resonance widths t /"> and nuclear deformation parameters was found. T, and r;

. the widths

of the resonances corresponding to vibrations 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 Ob subshell.

I

I

i

1

Fig. 2. Total nuclear -/-absorption cross sections |rr„J measured bv the absorption method for 1 '‘Sm

1

3

*Gd. '"’Ho. '""F.r. '*‘Yb. ' "Hf. '""Hf. '"'Ta. ‘" 2 W. '"*W. '""W and ‘" ; Au. R ms error bars are shown. 535

(OVER)

U.S. OEPARTMENTOF COMMEPCi

NATIONAL BUREAU OP STAMOARDS
Table 2

Parameters of Loreniz curves fitting the experimental data on <r 10,

Nucleus

( MeV)

"i (mbl

r, (MeV)

£. (MeV)

<T; (mb)

r, (MeV)

a,r, aj,

r

(MeV)

,S4Sm 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

,65 Ho 12.3 202 . 2.3 15.2 239 4.8 2.47 7.0

.6. 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

,7 »Hf 12.2 291 3.1 15.5 334 4.9 1.80 7.2 ,»°Hf 12.2 286 r- 3.2 15.3 324 5.1 1.31 7.1 "‘Ta 12.1 272 3.0 15.0 316 5.1 1.97 6.8

1»2 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 "6 W 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

r, 0 11.2 % 9.3 ", l.5\ 9 7

n 4 6 °„ 0.22

0.2 MeV

Taiii i 3

Ratio* of nuclear ellipsoid axes (A ). deformation parameters ( /<) and intrinsic quadruple moments <(?„). calculated from hi

, /:,

Nucleus ' '‘Sni 1 ^Cid '"‘Ho '""tr ‘'•Yb ' "Ilf '"‘‘Ilf '"'Ta '" J W '"4 w '""W

A 1 120 1 302 1 259 1.327 1 289 1.296 1.231 1.263 1.271 1.268 1.229 0 326 I) 309 0 266 0.334 0 296 0303 0238 0.270 0.278 0.274 0 235 P

± 0 ill 7 Ml 016 ± 0 036 ±0 032 ±0 024 ±0032 ±0036 ±0.026 ±0.030 ±0 032 ±0033

(i 3 t> 2 5 S 7 5 7 0 7.5 7.2 6.9 7.2 7 1 6 2

. o 3 til 3 ±0 8 ±0 7 ±0 6 ±08 ±0 9 ±0.7 ±0 X ±0 8 ±0 9

Tahi i 4

Integral characteristics of HI giant resonance

Nucleus *0 ffOL a i a 1L a 2 ° - iL * :, 4 iMeV bl 0 06.VZ A (MeV b) 0.06 .VZ A (nth) (mb) (mb) (mb MeV * ‘) (mb MeV '

') (pb • 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 2.07-0.07 091 2.95 1.30 143 ±4.6 163 0.194 10.5 ±0.4 14.9 3 30 '"'Ho 1.86 ±0.06 0. 78 2.53 1.06 155 ±4.4 160 0.177 10. 1 ±0.3 12 6 2.54

'""l:r 2.24-0 06 092 3.07 1.26 161 ±4.3 197 0.212 12.0±0.3 16.0 3.13 '*3b 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

' '"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 '"HI 2.72 ±0.06 1.05 4 03 1.56 200 ±4.4 250 0.246 15.1 ±0.3 20.7 3 61 '"Ta 2 34 ±0 0' 1.09 3 81 1.46 2 1 0 ± 5.3 245 0.239 16.0 ±0.4 20.0 3.45

1 " \V 2.36 ±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 '3 ±0 07 1.05 3.80 1.43 207 ±5.3 251 0.240 1 5.9 ± 0.4 209 3.51

2 90 — 1) 07 108 3.95 1.48 21 4 ± 5.3 256 0.241 1 6.2 ± 0.4 21 6 3.56 Au 3. 12 ±0.06 110 4.37 1.54 229 ±4.

2

276 0.241 1 8.6 ± 0.4 23.3 3.49

536
.Er

A=1 70
• ".‘Pr'

[J38
Ref. K. Miyano, T. Kuroyanagi

Nuclear Phys. 315 (1963)

Elem. Sym.

Er 170 68

Ref. No. 63 Mi 3

Method Linac; radioactivity JHH

Reaction'* E or AE <7d E J * Notes’

! *r l70

(Y,p) Bremss.

21

Mostly identification of Ho

study of decay scheme

No cross section data.

169 and

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS form NBS-418

(S-1-63) U3COMM-OC 1SS3S-P93 PHOTONUCLEAR DATA SHEET 539
ref. F. R. Metzger and V. K. Rasmussen

Phys. Rev. C8, 1099 (1973)

EL EM. SYM.

Er 170 68

METMOO REF. NO. 73 Me 4 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

1 G.G LET 2 C 2 SCD-D DST

1.824 MEV LEVEL

In addition to the previously known I" states of lwEr at 1663 and 1830 keV, levels at 1812 * 1 keV (‘“Er), 1786* 1 keV (“*Er), and 1824* 1 keV (lT#Er) have been excited using electron bremsstrahlung. Based on the observed angular distributions of the scattered photons, all three previously unknown levels were found to have spin 1. Linear polarization measure'*

raents using a two-slab GefLl) polarimeter led to negative parity assignments for the 1786- and 1824-keV levels but were Inconclusive with respect to the less strongly excited 1812-keV

level. Below 1.9 MeV, the 1663-, 1786- , and 1824-keV levels are the dominant El excitations in their respective Isotopes, the partial widths of their ground-state transitions being r0 «32*5, 46*5, and 30*3 meV. The B{£ljl"— g.a.)/B(£l;l“— 2J) ratios of 0.52*0.02, 0.51* 0.02, and 0.53* 0.02 differ considerably from the ratio 1.31* 0.11 for die 1812-keV

level and the reported ratio 0.22 for the 1830-keV 1" state and are very close to the Alaga - value of 0.50 for X»0' levels.

TABLE m. Results of the measurements using the two-slab Ge(Ll) polarimeter. Nt and Nx represent the counting rates in the full energy peaks with the slabe

parallel and perpendicular to the scattering plane, respectively.

Isotope OceV)

Transition *7

OceV) <%>

***Er 1682 V—0* 1662 *7.4 A 4.9 i“—

r

1382 *3.7 *3.4

1812 1 —0* 1812 -3.8*10.0 “'Er 1788 1 —0* 1788 *18.7*7.4 1—2* 1708 -1.4 *4.3 '"Er 1824 1 — 0* 1824 *3.8 *4.8 i—

r

1745 0. 0*3.1

TABLE II. Comparison of the experimental ratios of the counting rates in the 98 and 127* scattering geometries with the ratios expected for different values of the spins of the excited states.

W(127*)/W(98*)

Theory

Isotope CkeV) Experiment Spin 1 Spin 2

‘“Er 1663 1.39*0.11 '"Er 1812 1.40*0.17 ‘“Er 1786 1.38*0.07

1.36 0.49 '"Er 1824 1.33*0.09

form N3S-418

(REV. 7*1 4-441 USCOMM-NBS-OC

TABLE IV. Widths and branching ratios of the ««.«». «»Er levels. The direct results of the NRF scattering experi- ments are listed in column 5.

Level r,Vr r,

Isotope (keV) r,/r, B (El; 1"— g.S.)/B (El; 1"— 2*

)

(meV) iyr* (meV)

‘“Er 1863 0.60* 0.02 b 0.52*0.02 12.0*1.8 0.38*0.01 32*5

1812 1.50*0.12 1.31 *0.11 6 4.8 *0.6 0.60*0.02 8*1

1830 *0.33 d *0.22 # • # *0.25 2.4 ‘“Er 1786 0.59*0.02 0.51*0.02 17.0*1.7 0.37*0.01 46*5

‘"Er 1824 0.81*0.02 0.53*0.02 11.4*1.1 0.38*0.01 30*3

* Assuming the absence of branching to levels above the 2f state.

b In good agreement with the value of 0.61 adopted in Ref. 18.

« This might be the ratio ofB<Afl)'s rather thanB(£l)’s since the polarization experiment was not conclusive.

" From die decay of “’Ho; see Ref. 18. 18

Nuclear Data Sheets , 1959-1965, complied by the Nuclear Data Group

(Academic, New York, 1966). _ 54Q
REP. F. R. Metzger

Phys. Rev. C13 , 626 (1976)

EL EM. SYM.

Er 170 68

METHOD REF. NO. 76 Me 4 hmg

REACTION result EXCITATION ENERGY

SOURCE OETECTOR

ANGLE

TYPE RANGE TYPE RANGE

G.G LFT 1- 4 c 1-4 SCD-D DST

(1.824-3.406)

Some 40 states in IM' ,6*’ 170Er, most of them previously unknown, have been excited using bremsstrahlung with 5 4.2 MeV endpoint energy. For all but three of these levels, the angular distribution of the resonantly

scattered radiation favors the assignment of spin 1. For some of the strongly excited levels, linear polarization measurements have been performed. They indicate that these levels have positive parity. The branching ratios further characterize them as K = 1 excitations.

10 STATES, 1.82-3.41

TABLE IV. Properties of levels excited in 110 Er with

photons of £4.2 MeV energy.

^tertl (MeV) r r0

: /r (meV) (r„/r) 1 r„ (meV)

1.824 b 1” 11.4*1.1 0.38*0.01 30*3

2.039 (1\2V 1.2 *0.3 d 0.52 c 2.3 *0.7 d

2.133 (1) 3.7 ±0.5 0.72*0.05 5*1

2.701 (1) 11.5*2.2 0.67*0.06 17*4

2.751 (1) 3*1 -1 3*1

2.789 1* 24.4*2.5 0.67*0.02 37*4

2.930 (1) 3. 3*1.0 0.50*0.15 7*3

2.938 (1) 5.3 *1.2 0.60*010 9*3

3.064 (1) 14.1*3.9 0.33*0.09 43*7

3.406 !<> 100*12 0.69 ±0.02 145*18

1 This is really Tj/( r0 + rt) since, in addition to the ground state transitions, only the cascade y rays to the

first 2* state at 79.3 keV could be observed.

b See Ref. 1. c See Ref. 5.

d (Assuming spin 1.)

1F. R. Metzger et al., Phys. Rev. C8_, 1099 (1973)

.

%. Kawade et al., J. Phys. Soc. Japan 36,

1221 (1974)

.

form N3S-418

IR EV. 7-1 4.641 USC OMM-N 83*0 C PHOTONUCLEAR DATA SHEET 541

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
542
THULIUM

Z=69

Thulium is a very rare metallic element belonging to the

rare earth group and was discovered in 1879 by P. Ti Cleve

while examining crude erbium oxide. The name comes from the

Latin word Thule meaning the remote part of the

northernmost inhabitable world. In 1911, C. James obtained

a pure compound of the substance by the fractional

crystalli zation of its impure brornate; this separation

involved more than 15,000 operations. Tm

A=169
544
j.G. Chidley, L. Katz, S. Kowalski

:an. J. Phys. ^6, kOJ (1958)

EL EM. SVM. | A

Tm 169 69

Betatron

REF. NO.

58 Ch 2 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ANGLE TYP* RANGE

G, N RLY THR C THR BF3-I l4.PI

See 58 Ka 1 for cross sections

TABLE I Measured photoneutron thresholds

THRESHOLD

Measured Other 0 values, Reaction Q value, Mcv. Mcv. Method Reference

Tml,*( 7, »)Tm1 ** S.00±0.05

3-418

A4I

* 26010-^*4

U.S. OEPAHTMENTOF CC.'.i.V£ = C: NATIONAL aU»*£AuO^ ST w PH0TC.NUCL2AR DATA SHEET 545
z L. Katz, G.B. Chidley

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

USSR: 1958) 371

tL&M. SYM. A

Tm 169 69

METHOD Betatron; neutron cross section; BF, counters; ion chamber monitor

3

REF. NO. 58 Ka 1 NVB

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

angle TY PC HANOI type pangs

G,XN ABX 8-22 C 8-22 "*BF3-I lpi

T a 6 a n u a 2

Ilopoiu ucnyCKOMUA ffiomoHt&mpuMa

Haoroa Bn. Mm Bm. Mm M30Ton IS-. Mm Bm. Mm

V51 '11,16 20,5 L^o 8.81 16,1 Mn» 10.14 19.2 priu 9,46 17.6 Co53 10.44 18,6 Tbuo 8.16 14,8 As'3 10.24 18.1

| Ho>65 8,10 14.6 Y»9 11.S2 20.7 Tm151 s.n 14,7 Nb» 3.86 17.1 j Lul7S 7.:

.

14,2 RhiM 9.46 16.8 Taisi 7,66 13.8 jm 9.14 16,2 Au1 *7 7,96 13.3 Csua 9.11 16,5 B1203 7,43 14,5 THRESHOLDS

so npuoc;iQHU, uociio.ii.Ky ohm npcuumaiOT 22 M$a 00 dccx cuynaux, KpoMo

aojiOTa, juifl KOToporo 5JJ1 =21 Mas. CoowcTua coneimu «c(T) cbcaohk.

b Ta6.i. 3. ....

TaSaana 1 l1 •• (rT

), 6apN r. Mm s*\ Mm- 6apn

r<22). to* MBAmpoH/lOO p • mo*»

V« 18,4 0.062 5.2 0.33 1,62 Mn« 20.2 0.060 7.0 0.39 2.01 Co«® 18,3 0,068 6.3 0,44 2.30 As7* 16.4 0,090 9.5 0.74 4.25 Y8# 17.1 0,172 5.2 0.93 ,5.33 Nb®* 18.0 0,15u 7.5 1,17 6,80 Rh1®* 17.5 0.160 9.4 1.40 8.28

J1S7 15,2 0,273 6,8 1.76 11.9 CS133 16.5 0,238 7.7 1.59 10.7 Law* 15,5 0.325 3.8 1,55 11.2 prui 15,0 0,320 4.9 1.93 13.1 Tb1 *® 15.6 0,274 9.8 2.49 18.1 Ho1 ** 13,5 0,305 8.9 2,52 18,7 Tm1 ** 16.4 0.250 8.4 1.91 14.9 Lu17* 16,0 0,225 8.4 1.90 23.0 Ta1*1 14,5 0,380 8.5 3.15 22,0 Au1 *7 13.8 0,475 4,7 3.04 22,6 Bi«* 13,2 0,455 5.9 2,89 23,2

t

a — Buxoa OoroBeftTpoHOB qjim Tm ; 6 — j„(£.)

»c<t) MR Tm

-OHM NBJ--41S

- - J . 7.1 *.*41 > C . 1 0-PB4 PHOTCNUCLSAR DATA SHEET 546

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUAlAUOr ITanO* ADS
K. N. Geller, J. Halpern, and E. G. Muirhead

Phys. Rev. JJJ, 1302-12 (I960)

EL EM. SYM. I A

Tm 169 69

•I'THOOBetatron; neutron threshold; ion chamber

REE. NO.60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle TYRE HANOI

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

THRESHOLD

Tasix L Summary and comparison of neutron separation energies inferred from present threshold measurements with values predicted irom mass data and reaction energies. All energies arc expressed in the ccntcr-of-ma&s system in Mev.

Kritciiim Nil, runs- Present results Other results Method Reference

: Tm"(Y.»)Tm‘“ • 2 8.11 ±0.05 8.00 ±0.05 threshold f

NBS-411

.. M «*MI

U.S. DEPARTMENT OP COMMERCE

NATIONAL auREAUOr . r **•.*'•« *09

PKOTCNUCLSAS DATA SriccT 547
Atomic Number A

Fig. 15. Ratio a^Ja, versus atomic number A. Here a.M is the level density parameter taken from

the neutron resonance work of refs. '- 1

), 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 pciints which are based on measurement of neutron mean energies at two bremsstrahlung energies only. (over)

robM N3S-418

IRtV. 7-14-44) U1COMM-OC 26010- PS

4

U.S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 548
Table 3 (continued)

Target N

(residual nucleus) *)

Goodness

of fit s

) no with

p.c. p.c.

£.(24) T ap (MeV)') (MeV) d

) (MeV" 1 )*) (MeV)')

a,Ja,

Ba 75 1% F 1.16 16.5-I34 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-* 3, La 13.76-,19La 0.89 Ce 81 89% F G 1.24 0.70 17.0-139Ce 17.8 -l “Ce 1.04 83 11%

Pr 81 100% G G 1.17 0.65 17.0-l4O Pr 17.05-,4IPr 1.00 Tb *) 93 100% 1.15 19.3-* 3,Tb 21.85-,40Tb 1.14 Dy *) 93 2% 1.06 20.9-‘4 ‘- 3 Dy 21.9 -l43Dy 1.05 94 19%

95 25%

96 23%

97 28%

Ho 97 100% P G 1.06 0.56 21.4-'**Ho 20.66-,44Ho 0.97 Er *) 95 2% 1.11 19.2-l44 Er 21.9 -l44Er 1.14 97 33%

98 23%

99 27% \ 101 >3% • Tm*) 99 100% 1.03 24.0-t#sTm 22.58-lTOTm 0.94 Ta 107 100% G 1. 00 0.49

' 26.0-' 40Ta 21.2 -,4,Ta 0.82 W 107 26% G F 0.98 0.50 27.0-lMW 23.0 -,43W 0.85 108 14%

109 31%

111 28%

Au 117 100% * G 1.19 17.5-,94Au 20.24-,9 *Au 1.16 Pb 123 24% V.P. 1.87 1.20 7.5-204Pb 10.1 -20TPb 1.35 (Z - 82) 124 23%

125 52%

Bi 125 100% F 1.65 1.03 9.0-2O *Bi 13.8 -2l0Bi 1.53

*) Neutron numbers and abundances of respective residual nuclei in (y, n) experiments.

*) 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.

*) Bremsstrahlung photoneutron mean energies £. for peak bremsstrahlung energy Eo = 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. *• *). *) Measurements of £,,(£„) for these nuclei were made only for £0 = 21, 23 and 24 MeV.

549
REF.

METHOD

A. Suzuki, K. Shoda, M. Sugawara, T.

S. Olkawa, and J. Uegakl

PICNS-73, Vol. I, p. 195 Aailomar

Salto, H. Miyase,

EL EM. SYM. A

'Em

REF. NO.

Z

169 69

73 Su 10 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE TYPE RANGE TYPE RANGE

E.P RLY 5- 20 D 15-= 20 MAG-D 125

,Hrm(e.ep) s.iaj- 40«Co« 60

143 Ty6C«Ep<T0 }.

,y.

70*4R< SO

|j|.- 1,^

a&atixM 1

A

jr

i

\ SftcEpAlOO If.- JOO<cpmo „ 1#' i,r Jr V

y 1

1 *

IS IS IT IS IS IS IT IS incioent electron e*»g»<m»*>

r, q .3

181 Ta(fl)

(p resonance Ip resonrrice t**l7.4Mev Ex =1 8 3 Mev

0 2 4 6 0 a2 4 6

,69 Tm (I)

resonance

E* = 15 7 Mev

r?sonance £*=102 Mev 0246 0-246n

ENERGY OF RESiCUAc STATS

( M»v }

FORM NSS-4U

IRCV. 7*1 4*641 USCOMM-NBS-OC

U-S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS PHOTONUCLEAR DATA SHEET 550
V. Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

EL EM. SYM. A

I z

Tm 169 69

METHOP 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 of it, at E = 1000 MeV and deduced values of <rk assumed constant from £0 to 1000 MeV 999 = 1 GEV

Element z

2/a

(mb)

£o (MeV, (mb)

Bi 32.96 121 ±0.6 :oo 7.6 ±0.6 Pb 3145 5.4 ±0.4 220 3.6 ±01

T1 3110 4.1 ±01 230 18 ±01

Au 31.6& 10±0.15 240 1.4x01

Pt 31.18 1.1 ±0.08 255 (8 ±0.7) x 10” 1 Re 3011 (3.7 ±0.3) x 10" 1 280 (2.9 ±01) x 10- 1 W 29.78 (3.5 ±01) x 10- 1 290 (18 ±0.3) x 10" 1 Ta 29.45 (31±0.3)x 10- 1 300 il7 ±0.3) x 10- 1 Hf 29.04 (1.7 ±01) x 10” 1

. 310 (1.4 ±01) x 10* 1 Yb 28.31 (l!±0.1)x 10 _l

. 330 (11 ±0.1) x 10- 1 Tm 28.18 (71 ±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 (16±0.3)x 10' 2 360 (15 ±0.3) x 10- 2 Tb 2618 (21 +0.3) x 10* 2 370 (21 ±0.3) x 10* 2 Gd 26.04 (1.6±01)x 10- 2 3S0 <1.7 ±01) x 10* 2 Sm 2516 (11 ±0.2) x 10' 2 390 (1.4±01) x 10_l Nd 24.96 (91 ±0.9) x 10- 2 405 (1 ±0.1) x 10" 2 Ce 24.00 (8 ±0.9) x 10"

420 (9 ±1 ) x 10” 2 La 2319 (8.4±0.9)xl0-* 430 (1 ±0.1) x 10* 2 Sb 2116 (ll±01)x 10' 2 460 ( 11 ±0.3) x 10* 2 Te 21.19 (8.8 ± 1 )xl0- J 465 ( 11 ±01) x 10- 2 Sn 21.06 (U±01)x 10* 2 465 (1.7±0.3)x 10" 2 Cd 20.49 (1.7 ±01) x 10" 2 470 (21 ±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 (14 ±0.5) x 10* 1 515 (3.6 ±0.8) x 10- ‘ Ni 1315 (14 ±01) 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 IQ

-

1

Fig. 1 Nuclear fissilities as a function or Z

2

/.4. Experimental points: solid circles represent our data;

squares, the data from ref. 4

); open circles, the data from ref. "i: and crosses, the data from (p.O experi- ments10

). 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 and Sassi1

2

).

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.

form N3S-418

IP EV. 7.1 A. 04) USC OMM-N BS-0 C PHOTONUCLEAR DATA SHEET 551

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
ref. A. Suzuki and K. Shoda

Nucl. Phys. A260 , 172 (1976)

EL EM. SYM.

Tm 169 69

METHOD REF. NO.

76 Su 2 egf

REACTION RESULT excitation

ENERGY

SOURCE detector

ANGLE TYPE RANGE TYPE RANGE

E.P ABX 10- 18 00

•-t r in t

1

Q MAG-D 125

'

Proton yields obtained by summing protons with energies above levels given in tables.

Table 1 Parameters of the present experiment

Fig. 4. Cross section of the IHTra(e, e'p)

reaction. See also the caption to fig. 2-

Target Atomic

number

Purity

(%)

Thickness (mg/cm*)

Lowest proton

energy (MeV)

Bin size (keV)

Range of measurement (MeV)

***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

* ,sLu 71 99.87 (enriched) 5.24 5.34 150 15.05-20.0

,,lTa 73 99.9 (natural) 6.73, 6.16 200 16.0 -23.0

Tablx 3 Displacement energies obtained from the present data and the estimates with eqs. (20) and (21)

Target Resonance E* E, (exp) £.*) Et(d - 0.3)*) (MeV) (MeV) (MeV) (MeV)

***Tb 1st 15.75 ±0.15 15.58 16.06 15.93 2nd 16.50±0.15 15.46 ***Ho 1st 16.15±0.14 15.64 16.38 16.23 •«*Tm 1st 15.76±ai3 16.20 16.76 16.63 2nd- 1644±0.14 16.22 »’»La 1st 16.44±0.13 16.75 17.07 16.93 2nd 17.45 ±0.15 16.35 ‘•‘Th 1st 17.31 ±ai5 16.40 17.38 17.24

*) Estimated with eq. (20). •) Estimated with eq. (21). Table 4

Deformation parameters of IAS du« derived from the (e, e’p) result

Target Resonance IAS Parent

state *ua-V) *

(assumed)

<W)

***Tb 1st f1321

1

ground —0.008 0.31 0.30 2nd 1-1512] 875 keV —0.016 0.29

‘•»Ho 1st n«33] ground —0.023 0.30 0.28

l**Tm 1st J-(521] ground —0.018 0.29 0.27

' 2nd i-1510] 565 keV —0.019 <L27

,TS Lu 1st i- £5141 ground ^0.010 0.28 0.27 2nd J— [303] 1420 keV —0.029 0.25

‘•‘Ta 1st i-(503] 670 keV —0.046 0.26 0l21

The assumed deformation parameters for the parent states <5» are also shown.

•) The errors ore about ±0.01. 552

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
* tF J.J. Murphy II, H.J. Gehrhardt and D.M. Skopik

Nucl . Phys. A277, 69 (1977)

ELEM. SYM. A

Tm 169 69

METHOD Her. no.

77 Mu 3 egf

REACTION RESULT EXCITATION ENEROT

SOURCE OETECTOR

ANGLE

E,A ML 13-100 100 MAG-D DST

Fig. 1. The a-partic!e energy spectra at 10° in the lab for the six nuclei studied. Note that as Z in- creases, the cross section decreases and the energy of the peak increases. Errors are statistical. Curves

are to guide the eye.

roRM NSS-4U

(REV. T-I4.A4I USCOMM-NSS-OC

Fig. 2. Energy of the cross section peak as a function of Z. The solid line is the energy of the classical Coulomb barrier. 553

department or commerce

INAL •URIAuOr 3TANOAROS
Fig. 5. Angular distributions for thulium (Z — 69). The forward peaking at high energies is taken

as evidence of a-clusters in this nucleus. Errors arc statistical. Curves are to ruid; the eye.

554
Yb

YTTERBIUM

Z=70

Ytterbium is a fascinating element of the Periodic Table

primarily because of its valence variation in different

environments. In the. divalent state the element has a completed 4f level Jbut in the trivalent state this level is

incomplete with thirteen'electrons. This dual valence gives

rise to interesting and variable chemical and alloying

properties. The application of modest pressure (16,0000

atm)' changes the electrical conductivity from metal l ie to

semiconducting. Higher pressures increase the semi- Yb

conducting properties until at a pressure of 40,000 atm

„

ytterbium reverses to its metallic conducting state.

I 555 Yb

:.G. Fuller, B. Petree, M.S. Weiss

J uys. Rev. 112. 554 (1958)

Becatron; ion chamber

EL EM. SVM, A

Yb 70

REP. NO.

58 Fu l NVB

REACTION RESULT EXCITATION ENERGY

SOURCE detector

ANCLE TYPE RANGE TYPE RANGE

G, XN ABY 7-40 C 7-40 BF3-I 4PI

..r.»10, 6

\ Mean energy and width of giant resonances. and r are “* 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.

Table L Target properties and results.

n»t weiRiU Element Form used grams Sn Sn 4.81 i r 8.55 La La 10.43 Ce Ce 4.99 Sm Sm,0, 2.90 Tb Tb.Or 3.04 Ho HoiOi 1.87 Er ETtO, 5.41 Yb Yh>Oi 3.37 Ta Ta 8.41 Au Au 3.16 Pb Pb 8.05

barns

SvdE* HZ/A

Mev-b

“r*» Mev

0.30 0.064 5.0 0.36 0.035 6.0 0J4 0.063 5.2 0.45 0.080 4.5 0.26 0.073 . 8.6 0.39 0.087 8.7

0.41 0.079 7.5 0.50 0.100 8.5 0.50 0.090 7.0 0.49 0.077 6.0 0.68 0.085 4.2 0.75 0.081 3.8

.. * #*(7’*) ** *^e maximum value and "I*** the full width at /*

* fitted with resonance lines to determine these values. M.&rstt011 •wiom f~«3Ss

a t 3S-418

’ 4-641 c *4 01 '*-*••4

U.S. DEPARTMENT OF COMMERCE

NATIONAL aURCAUOF <T*nOA«OS

PH0T0NUC.r.,R DATASHEET 557
REF. Z T* Methasiri and S. A. E. Johansson

Nucl. Phys. Al67, 97 (1971)

| EL EM. S VM. A

Yb 70

METHOD REC . NO.

71 Me 1 egf

REACTION RESULT excitation

ENERGY

SOURCE oetector

ANGLE

TYPE RANGE TYPE RANGE

g t f ABY THR-900 C 300-900 FRG-I 4PI

Table t The constant fission cross sections above the threshold

Element a, (cm1

) Element a, (cm1

)

Pb (5.0±0.2) x 10" 1T U (1.1 ±0.1) x 10"** Au (l.7±0.1)xl0" 1T Sn (4.3±1.1) x 10" 1 * Ta (3.3 ±0.2) x 10" 11 Af (8.4 ±2.0) x 10" 1* Yb (l.2±0.2)xl0- , « Mo (1.7 ±0.4) x 10" *• Ho (5.5 ±0.3) x 10" Cu (6.6± 1 .2) X

10"** Gd (5.3±0.8)x 10" 1* Ni (5.8±0.1)x 10" 1 * Nd (1.3±0.2)X10-**

[over]

FOAM N8S-418

IH CV. 7-1 4-04) USCOMM.OC 2«010-P«4 PH0T0HUCLEAR DATA SHEET 558

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANOAROS
(mi

taction

ptr

eq

quantum

(•l6 ,

*cm >)

Cm.

Mltion

(».

.<|

^Mnlun.

^

u

°o.»

MtHon

p«

.q

quantum

Fig. 1. Cros£ sections per equivalent

quantum <J^(E) as a function of log E.

559
REP. Vo Emma, S. Lo Nigro, C. Milone

Nucl. Phys. A257 , 438 (1976)

EL EM. SYM.

Yb 70

method REF. NO. 76 Em 2 egf

REACTION RESULT EXCITATION ENERGY

SOURCE detector

angle TYPE RANGE TYPE RANGE

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

Table 1 Measured values of <r, at £>1000 MeV and deduced vaJues of <j* assumed constant from E0 to 1000 MeV

999 = 1 GEV

Element Z*/A

(mb)

£o

I MeV) (mb)

Bi 32.96 123 ±0.6 200 7.6 ±0.6 Pb 32.45 5.4 ±0.4 220 3.6 + 03

Tl 32.10 4.1 ±0.3 230 2.8+03 Au 31.68 20±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" * 280 (2.9±0.3)x 10" 1 W 29.78 (32 ±0.3) x lO' 1 290 (2.8 ±0.3) x 10* 1 Ta 29.45 (3.3 ±0.3) x 10-' 300 - 1 2.7 ± 0.3) x 10* 1 Hf 29.04 (1.7 ±0.2) x 10*

310 (l.4±02)x 10- 1 Yb 2831 (12±0.1)xl0- 1 330 (1.2 ±0.1 )x 10- 1 ‘ Tm 28.18 (72 ±0.8) x 10-

335 (6.8 ±0.8) x 10* 2 Ho 2721 (3.6 ±0.4) x I0’ 2 355 (3.5 ±0.4) x 10- 2 Dy 26.80 (26 ±0.3) x I0* 2 360 (23±0.3) x 10" 2 Tb 26.58 (22 ±03) x 1C J 370 (2.5 ±0.3) x lO" 2 Gd 26.04 (1.6 ±02) x 10* 2 380 (1.7+02) x 10' 2 Sm 2526 (13 ±02) x 10* 2 390 ( 1 .4 ± 02) x 10” 2 Nd 24.96 (92 ±0.9) x 10“ * 405 (1 +0.1) x 10" 2 Ce 24.00 (8 ±0.9) x 10* 1 420 (9 ±1 ) x 10” 1 La 2329 (8.4 ±05) x 10- 2 430 (1 ±0.1)xl0- J Sb 21.36 (12±02) x I0* 2 460 (1.5±0.3)x 10-2 Te 21.19 (8.8 ±1 ) x 10* 1 465 (I2±02)x 10” 2 So 21.06 (1.3±02) x 10" 2 465 ( 1 .7 ± 03) x I0" 2 Cd 20.49 ( 1.7 ±03) x 10- 2 470 (22 ±0.4) x 10" 1 Ag 20.47 (2 ±03) x I0' 2 470 (26 ±0.4) x 10“ 2 Zn 13.76 (2 ±0.4) x lO

- ' 515 (3 ±0.6) x 10" 1 Cu 13.44 (24±02)x lO

- ' 515 (3.6 ± 0.8) x 10" 1 Ni 13.35 (24 ±02) x I0

-1 510 (3.6 +0.8) x 10-' Fe 1210 (3 ±0.6) x 10" * 510 (4.4 ±0.9) x 10* 1

L.5

Ui

—i

Fig. 2 Nuclear fissilities as a function of Z

2/A. Experimental points: solid circles represent our data;

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

T

); and crosses, the data from (p.f) experi- ments20

). The straight line is the best fit calculated from our data for Z‘/A > 26. The dashed curve is the curve VI calculated by Nix and Sassi 1

2

). form Mas-418

IREV. 7.1 4.841 USC OMM-N as-oc

4

A.V. Mitrofanova et al.

Sov. J. Nucl. Phys. £,

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 BUR E AU OF STANOAROS PHOTONUCLEAR DATA SHEET 560
Yb

A=173

..

.

. . •' ' ' .

Yb

A=173

[561

Yb

A=173
...

.*

(~562
K. N. GelLer, J. Halpern, and E. G

Phys. Rev. Uj, 1302-12 (i960)

METHOD

Muirhead

Yb 173 70

REF. NO. Betatron; neutron threshold; ion chamber 60 Ge 3 NVB

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TVP*

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

THRESHOLD

Table I. Summary and comparison of neutron sq>aration 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.

Uitu:liiNi Nil. ruiw I'rescnl re-Mills - Ollier results Method Reference

Yb1»(V,«)YbTM 1 6.50 ±0.08 6.35 ±0.06 mass data q

• W. H. Johmoo. Jr„ and A. O. Nler, Phy». Rev. 105. 1014 (19)7).

r com N8S-418

f .1 4*941

4*4 .nr

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUACAUOr -4 .OAPOS PK0TCNUCL2A3 DATA SHEET 563
.

564


L. G. Moretto, R. C. Gatti, S. G. Thompson, J Heisenberg, L. M. Middleman, M. R. Yearian,

Phys. Rev. _L72, 1176 (1969)

METHOO

T

R. Routti, J. Hof stadter

H.

Y'o 174

REF. NO. 69 Mo 1 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

ANGLE TYPE RANGE TYPE RANGE E,F ABX thr-999 D 60-999 TRK-I DST

G, F ABX thr-999 c 60-999 TRK-I DST

Tabular data given; angular distribution isotopes
„ e , G.M. Gurevich, L.E. Lazareva, V.M. Mazur, S.Yu.

G.V. Solodukhov, V.A. Tyutin

JETP Lett. 28, 157 (1978)

Pis'ma Zh. Eksp. Teor. Fiz. 28, 168 (1978)

METHOD

Merkulov,

EL EM. SYM. A

Yb

REF. NO.

174 70

78 Gu 7 hg

REACTION RESULT EXCITATION ENERGY

SOURCE DETECTOR

angle TYPE AANGC

G,MU-T ABX THR-31 C UKN NAI-D 4PI

The absorption method is used to measure the total photoabsorption cross

section curves for deformed ,34Sm, l36Gd, l6‘Er,

l74Yb, 1S4W, and 1,4W nuclei in the region of the E 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. -f-y, 27.70. +q

TABLE I.

Nucleus MeV

a

i mb

rt MeV

E 2 MeV

*2mb

r2 MeVr

MeV

<?o

b

0

z/v 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

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

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

l74 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

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

186

ff 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% 1 10.5% ±7.5% ±1.3% ±9.4% ±3.8% — — — —

(over)

form MSS-4U

(MV. 7- » 4-441 USC OMM«N BS-OC PHOTONUCLEAR DATA SHEET 568

U.S. DEPARTMENT OF COMMERCE

NATIONAL IUR ( A U O F STANOAROS
FIG. 2. Total cross sections of the photoabsorption of the nuclei '“Sm. ,- ’Gd.

'“Er. "*Yb, "W. and "*W. The mean

squared errors are shown.

FIG. 3. Experimental values of AT = T — (E: — E,) in the region of deformed nuclei with A = 1 53-186: O—present work and111

: •—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, + /",) curve was obtained from the AT curve after introduction of corrections in the interval A = 175-186.

569
ref. G.M. Gurevich, L.E. Lazareva, V.M. Mazur,

G.V. Solodukhov, V.A. Tyutin

Nucl. Phys. A351 , 257 (1981)

METHOO

S.Yu. Merkulov. CL EM. SYM.

Yb 174

REF. NO.

70

81 Gu 2 hg

REACTION RESULT

EXCITATION ENERGY

SOURCE DETECTOR

ANGLE

TV PC PAN6C

G.MU-T ABX THR-20 C 27 NAI-3 4PI

_ Abstract: The curves of the otal gamma-absorption cross sections to in the El ziant resonance en<?rev range tor [he nuclei ' >4Sm. ‘-""Gil. '"'Ho. '" 8 Er.

‘‘ 4Yb. ‘ ,8 Hf. l,0 Hf. '“Ta. ,8J W l *4W 1,# w

and ,l

* Au have been measured using the absorption method. Parameters of the Loren tz curves

fitting the measured cross sections ft

Ul4 are given. Quadrupole moments (Q0) and nuclear deformation

parameters (/I) were obtained. For deformed nuclei in the » 1 55 < < '180 region a violation of the correlation between

giant resonance widths i/'l 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

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

NUCLEAR REACTIONS "‘•‘Sm.

,,BGd. '"’Ho. ">8 Er.

,?4Yb. ' ,sl8u

Hf. ,s ‘Tu i»i. m*. t.» w i»- Au X). F = 7 20 VleV: measured total deduced integrated a. Lorcntz line parameters. l,4Sm. 1 '"Gd. ' B5 Ho. '"*Er.

'* 4 Yb. t,!8 - 180 Hf. IM1 Ta 18J - l84 - l8 “* 7 *w

Au deduced II. Q„. f. giant resonance evolution. Enriched, natural targets.
Table 2 Parameters of Lorentz curves fitimg the experimental data on <r

Nucleus E, r, £. <7 ; r. <T,r, f (MeV) (mbi ( MeV i (MeV) (mb) (MeV) <j,r

,

(MeV)

' 5 *Sm 1 2.2 188 3.4 15.7

' 207 5.7 1.85 8.1

,! "Gd 12.3 206 3.2 15.7 220 5.5 1.81 7.7

‘* s Ho 12.3 202 15.2 239 4.8 2.47 7.0

ls, 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 ,M Hr 12.2 291 3.1 15.5 334 4.9 1.30 • *> '""Hf 12.2 236 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

is: 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 "*w 12.0 246 3.3 14.5 332 5.1 2.07 6.4

i,t Au 13.7 535 5.2

Average

error 1-4% 1 1.2 °

0 9.3 % 1.5°, 9-7 % 4-6 0.22

0.2 MeV

Tahih 3

Ratios of nuclear ellipsoid axes (A). deformation parameters ( /<) and inirinsie quadrupole moments ((?„). calculated from £, N uc leus IMSm “"Gd' '"‘Ho '.""Er . ‘‘‘Yb '’"nr ""’HI

- ""Ta ' M -\v '" 4 W i

A 1 320 1.302 1.259 1.327 1.289 1.296 1.281 1.26.3 1.271 1 268 1 229

If 0 326 *0 017

0.309 ±0 016

0.266 ±0 0360.334 ± 0 0320.296 ±0 024

0.303 ±0.032

0 288 ± 0 0360.270 ±0.0260 278 ±0.030

0.274 ±0032

0 235 ±0 033

L>., 6.3

* o 3

6 2 r(l 3

5 s ±0 8

7.5 ±0.7

7 0 ±0 6

7.5 ±0 87.2 ±0 96.9 ±0.77.2 ±0 87 1 ±0 X

ft. 2 f ii 9

Tahi h 4

Integral characteristics of El giant resonance

Nucleus ««n °\\\ " ii. - j 4 J

(J » « :l a ,, A

5 J (MeV b) 0.06.32? A (MeV b) 0.06.Y.«? A (mb) (mb) (mb) (mb • MeV " ') (mb - MeV~ ') (/ib MeV - 1 )

‘‘ 4 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 '"Gd 2 0* ±0.07 0.91 2.95 1.30 143 ±4.6 163 0.194 10.5 + 0.4 14.9 3.30 ‘"‘llo 1. 86 + 0.06 0. 78 2.53 1.06 155 ±4.4 160 0.177 10.1+0.3 12.6 2.54 ‘""tr 2 24 2 0.06 0 92 3.07 1.26 161 ±4.3 197 0.212 12.0 + 0.3 16.0 3.13 '* J Yh 2 69±0.O5 1.07 3.82 1.52 195 ±3.4 240 0.247 14.5 + 0.3 19.2 3.54

; 'HI 2.85±0 07 111 3.99 1.55 208 ±4.9 247 0.247 15.3+0.4 20.2 3.59

‘"'III 2. 72 ±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 ±0.07 1.09 3.81 1.46 2I0± 5.3 245 0.239 16.0 + 0.4 20.0 3.45 2.86 ±0.07 1 09 4.01 1.52 211 ±5.3 256 0.248 16.2 + 0.4 21.6 3.70

2

TS±0 07 1.05 3.80 1.43 207+5.3 251 0.240 15.9 + 0.4 20.9 3.5+

'*"\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

'* 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

571
572
Yb

A=1 76

T. Cooper, W. Bertozzi, J. Heisenberg, S. Kowalski,

W. Turchinetz, C. Williamson, L. Cardman, S. Fivozinsky,

J. Lightbody, Jr-, and S- Penner

Phys. Rev. C13 , 1083 (1976)

ELEM. SYM.

Yb 176 70

method REF. NO. 76 Co 3 hmg

REACTION RESULT EXCITATION ENERGY

SOURCE detector

EfE/ FMF 1 , 1 34-111 MAG-D DST

LEVELS -082,-267

TABLE DC. Transition charge parameters of * ss Er and 116Yb.

issEr *«Yb

Units Po Pz Pi Po P: Pi

V fm 6.1610 5.8632 5.8556 6.3306 6.0151 5.1866

t fm 0.4872 0.5598 0.7271 • 0.4S6S 0.5188 0.9093 a2 0.3266 0.3503 0.3325 0.3100 0.3346 0.3874

At 0.0 0.0 0.0199 0.054 -0.054 -0.0375

As -0.0180 -0.0180 -0.0180 1 -0.006 -0.006 -0.006 * rms radius fm 5.2380 b 5.3150 c B(E2) *v 5.670 d 5.350 e B(E4) eV 0.0919 0.0092 xVfreedom 0.42 2.62 2.68 1.18 1.23 3.14 Transition fm 5.2380 6.9088 8.4777 5.3150 6.8689 6.6962

radius

FIG. 6. Measured form factors for the elastic (0*) and

the inelastic 0.081-MeV (2+

) and 0.267-MeV (4+

) states

in * T*Yb. The fitted curves are based on a best fit de- formed Fermi charge distribution.

Reference 3. Interpolated value from nearest neighbors. Reference 23. Reference 25. Reference 24.

TABLE V. Cross sections of 1T,Yb.

Elastic

2* 4*

d<r da da do

Energy Angle 1,it p btnfit dSl~e*p (MeV) (deg) (fm* 1

) (mb) (mb) (mb) (mb)

34.72 109.95 0.498 0.995X10 ±5% 0.964x10 0.379 xio* l ± 8% ... 39.62 127.81 0.591 0.146X10 *3% 0.145x10 0.463 xio*>± 4% ... 44.53 109.95 0.580 0.245X10 ±5% 0.239X10 0.707x10*** 4% ... 54.90 109.95 0.666 0.591 * 5

%

0.569 0.456x10*** 3% * # • 64.77 110.16 0.749 0.176 ±4% 0.191 0.205X10*** 2% -0.322 xio* 4 * 130%

74.97 110.13 0.834 0.108 * 7% 0.967 xxo*‘ 0.795 x 10* l ± 3% 0.140 xio* 5 * 20%

85.09 110.03 0.917 0.561 xl0*'±4% 0.537 X10*‘ 0.248X10*** 4% 0.929 xio*4 * 19%

95.30 110.03 1.002 0.244 xl0*‘*4% 0.246X10** 0.154 xlo**± 5% 0.103 x 10* J ± 10%

95.00 127.81 1.096 0.444 xlO" 2 * 4% 0.453 xlO* 1 0.100 xio* 2 * 3% 0.416 xlO* 4 * 9%

110.21 147.24 1.319 0.170 xlO* 5 * 9% 0.246 xio* 5 0.139 xio* 3 * 12% 0.596 x 10* s * 25%

J D.L. Hendrie, Phys. Lett.

36, 571 (1973); ibid, et al.

Phys. Lett. 26B , 127 (1968) . 22

A. Thompson (priv. commun.)

Eidgenoessische TH Zuerich,

1974 (unpublished)

.

2 i.O. Sayer et al., Phys. Rev.

Cl, 1525 (1970)

.

2 |.H. Stelson, Nucl. Data Al,

21 (1965)

.

FORM N3S-418

(REV. 7-14-64) USCOMM-NBS-OC PH0T0NUCLEAR DATA SHEET 575

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAUOF STANOAROS

Lu

LUTETIUM

1=71

Lutetium was discovered independently by C. A. von Welsbach

i and G. Urbain in 1907-08. IJrbain called the new oxide

3 lutecia — an old Roman name for his native city,

J Paris. Of all the rare earth metals, lutetium is the

f hardest and the most dense.
_\ -7.

• > •••'": ‘-i

;

- v ; '•',...

- '•-

V •'_. Sr:

'• •.*»%•.' "S* #*•••;•

.V ; - , " •

A

: :-'r. ,-'lV ?.-• ^ . _

'•> -••••- !V-.. •" - . - '" • -• -r

'

' •••.:" - . .-•* - >: •”:' ' '• • - -'»•- • ' — ••• W„.. \ V'- .. . . .

- 1 ", -

• '• *• ' - . •; .

' .-;v - • • * 'VW;xjr£j'&£y

. f?

,• - ?'£

- A- . .

- '•*- — v; ... .. •.

•

• •• v*/.- ~ v. Y:l-. •• .

. •:

( ~

r. '«f •; - . -- - • -- v

• -

.

, *; v

' '/•>.. i' 'V- ^

' --e

' ' .v\; : : •;

' r‘. .v , — •: -

"

.

- " .. -

"V-i

' : i-' _ v. .v/i-T. * ' * *

- ; ";'V :

' \

"

.• - :t+ **- •“»'

. -

*" '•••'”/ * 4

• • ' — v _ •..••- • v

: •'

,

:

• ;V- •

..

' • I •

. i

' •'

- r.4 . : ' V - - -

: . - ; .V : " /

- “ >

: v tY ' ' •.

• : ;

'

' . ;

• .:

.

: :• ,

!:rd 'v'.

'

' -i c

'

•

, . •

. ' \

"

.

' - .

•

. ,

• ~

• ' ' ‘

' \

:

:

• i'Y . :

;

. . •

' • '

• /

‘

- * . •-;-i \ ••

^

• • :

vv . ;
REF. EL EM. S YM. . A R. Bergere, H. Beil, P. CarLos and A.

Nucl. Phys. AI33 . 417 (1969)

METHOO

Veyssiere

Lu

REF. NO.

71

69 Be 6 egf

REACTION RESULT EXCITATION SOURCE oetector

- ENERGY TYPE range TYPE RANGE ANGLE

G,N ABX 7-24 D 7-28 MOD14PL

G,2N *95 ABX 14-28 D 7-23 MOD- I 4PI

G,3N nut ABX 24-28 D 7-23 MOD- I 4PI

x = fraction of total cross section resulting in a direct neutron J

n^ = fraction of neutrons emitted by direct effect at an energy where all the evaporation

neutrons go to (y,2n) cross section

nd = x/(2-x)

Tableau 3 Moments quadrupolaires intrinsiques

Cible % isotopes alb ex Pi ex Qo Q'a

ex (b)

sal 100 %

1J7

I 0.85 0.172 -2.3 ±0.4

;sCe 38.5% ,40Ce 0.104

11.1 %

I4,Ce 0.118

, ; Sni 15 % “’Sm

11.2% "“Sm

0.158

13.8% 14,Sm

7.5% 150Sm 1.23 0.219

0.190

4.5 ±0.4

3.53 26.6% ,slSm

i 0.304 5.93 22.5% l54Sm

' 0.351 ' 6.58

-sEr 33.4% "**Er

' 0.341 7.60 22.9% “7Er

27.1 %

,4*Er

0.288 I 6.96 ±0.4

7.80 1.314 0.339 7.60 14.9% 170Er 0.329 7.45

7

1

Lu 97.4% ,7, Lu 1.282 0.262 6.95 ±0.3 7.20

Tableau 3 Valeurs dc la temperature nuclcaire et du parametre a dc densite dcs niveaux

X 0 (MeV) £'*-£•„ (MeV) a (MeV* 1 ) a' (MeV* 1 ) a" (MeV- 1 )

I 0.05 ±0.005 0.03 0.03 1.30 ±0.20 10 6_;2.5 10 .3 10 ; 2

"‘"Cc 0.21 ±0.05 0.1 2 ±0.03 1.05 ±0.20 10 9-3.5 7^3

‘«Cc 0.8 ±0.20 6 9 4 8—3

Sm 0.1 8 ±0.04 0. 10±0.03

Er 0.20 ±0.05 0.11 ±0.03

. (12 ±4)

Lu 0.26 ±0.06 0.15 ±0.03 0.85 ±0.1 9 12.5 ±2.5 Hn

i over

wont* NBS-41S

(REV. 7.14.S4I

(JSC OMM.OC 2#0I0-P«4 PHOTONUCLEAR DATA SHEET 579

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
Tableau 4

R&gles dc sommc

Noyau ciblc (ilimcnts naturels)

<To (McV • b> *0

(McV • b) NZ

0.06 —

'To A

0.06~NZ

i/o/l 0.06 NZ

»-(

(mb) (mb • McV- 1

)

1

,.,r 2.02 ; : 0.I4 2.30±0.I2 1.85 1.09 ±0.07 1.24 ±0.07 1 29 ±0. 1

0

0.20 x0.02 S.6-0.6 2.7 -0.2 ,„Cc 2.13 0.15 2.53x0.13 2.04 l.05±0.07 1. 24 ±0.07 140±0.12 0.19 ±0.02 9.5 -0.6 2.5 - 0.2

i.iSin 2.48 -^0. 1

7

2.92 ±0.14 2.18 1.14±0.07 1.34±0.07 167 ±0.14 0.21 ‘0.02 11.8-0.8 2. 75 -0.2

„« Er 2.70 1 0.19 3.04x0.16 2.42 1.1 2 ±0.07 1.26 ±0.07 186±0. 1

5

0.20 x0.02 13.6 -1 2.7 -0.2

7

1

Lu 2.65 0.18 2.96 ±0.1

6

2.53 1.05 ±0.07 1.1 7 ±0.07 182 ±0.15 0.1 85 ±0.02 12.9x1 2.35x0.2

valeur moycnne

pour ces 5 corps 1.09 ±0.07 1.25 ±0.07 0.20 ±0.02 2.6 x0.2

580
Lu

A—l 75

Lu

A=175
582
' HbK cu &M. o r M. A L. Katz, G.B. Chidley

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

USSR: 1958) 371

Lu 175 71

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

REACTION RESULT EXCITATION ENERGY

SOURCE OETECTOR

angle

•TYPC RANGC TYPE manse G,XN ABX 8-22 C 8-22 BF3-I l4.PI

T a 6 .1 u u a 2 Uopcau ucnycKOHiui fpomoxeumpuMi

HaoTon Bn, Ma* Bn. M»« HaoTon R», Mu Bn, U*

V*1 11.16 20.5 Luo 8,81 16.1 Mn» 10,14 . 19.2 priu 9.46 17.6 Co*8 10.44 18,6 Tbi5# 8,16 14.8 As75 10.24 18,1 Ho>«* 8.10 14,6 yso 11.82 20,7 Tmis# 8.00 14,7 N.bM 8.86 17,1 Lu175 7.77 14,2 Rhi« 9.46 16.8 Taisi '7,66 13.8 jm 9,14 16.2 Aui»7 7,96 12.3 Csiaa 9,11 16,5 Bi'109 7.43 14.5

THRESHOLDS

ho npHBCitCHU, nocKO.TSKy oh u u'_- Jinaiox 2_ Msa bo bcox cjiynanx, Kpowe

BOJiOTa, iiJia KOToporo B^—21 il/au. Ccoikrua ce*ieimii ccfr) . cbbachh.

3 Ta6.T- 3* Taojiazca 1

Htotoa |

1 « (S

7

). &»P** | r. Mu r*». Mtt'6aptt

r<22>. 10* M«ampOH/t00 P’MOA*

V*i 18,4 0,062 5,2 0.33 1.62 Mn» 20,2 0.060 7.0 0,39 2.01 Co*8 18,3 0,068 6,3 0.44 2.30 As7* 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 Rh103 17,5 0.160 9.4 1.40 8.28 ji» 15.2 0.273 6,8 1.76 11.9 CsiM 16,5 0,238 7,7 1,59 10,7 La138 15.5 0.325 3.8 1,55 11.2 prl« 15,0 0,320 4.9 1.93 13.1 Tb 158 15,6 0,274 9.8 2,49 18.1 Ho16* 13.5 0,305 8,9 2,52 18,7 Tm188 16,4 0.250 8.4 1.91 14,9 Lu,7# 16.0

f 0,225 8.4 1,90 23,0 Taiai 14,5 0,380 8.5 3.15 22,0 Ail183 13,8 0.475 4,7 3,04 22,6 Bi208 13,2 0,455 5.9 2,89 23,2

"ISM N 3S-418

-. Z 1

.

4-941 C -401O.P44

u.s. department of commerce

NATION A L IURKAU OF STANOASOl

PH070NUCL EAR DATA SHEET 583
Ref. H.J. King, L. Katz

Can. J. Phys. %6, 415 (1958)

Elem. Sym.

Lu 175

Ref. No. 58 Ki l

71

Method 2k MeV betatron; neutron yield; BF^ counters; Victoreen dosimeter

EH

Reaction E or AE

s

ad E Jtr Notes

Lu

175

(Y,n) Bremss.

8-25 16 8.4 MeV

23

= 1.9MeV-mb a = 225 mb; E = 7-77±0.05 MeV

Neutron yield at 20 MeV is 1. 95X10'

n/mole/100 r.

Fig. :>. tiLu it; cross ~o ;ion.

' U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF ST A-V

l OAR OS form NBS-418 uscomm-oc isssa-Pes PHOTONUCLEAR DATA SHEET 584
ELEM. SYM. | A K. N. Geller, J. Halpern, and E. G. Muirhead I Phys. Rev. .118, 1302-12 (i960) Lu 175 71

METHOO

Betatron;

REF. NO. neutron threshold; ion chamber 60 Ge 3 NVB

REACTION RESULT EXCITATION ENEROY

SOURCE OETECTOR

ANGLE TYPE RANOK TYPE RANOK

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

THRESHOLD

Tabu L Summary and comparison of neutron sc;>aration energies inferred from present threshold measurements with values predicted from moss data and reaction energies. All energies arc expressed in the center-of-moss system in Mev.

Knurl inn No. runs Present results Other results Method Reference

Lu,w(v,i»)LuW4 1 7.88 ±0.08

. -OM NBS-41S

v

• rv im.oc ;noio*r^4

U.S* DEPARTMENT OF COMMERCE

NATIONAL BUPCAIJOF ST4sn*«OJ

PhOTONUCLEAR DATA SHEET 585
Ref. B.I. Deutch

Nuclear Phys. ^0, 191 (1962)

Elem. Sym.

Lu 175 71

Method 17S

Hf ^ source on centrifuge rotor; nuclear resonance flourscence; Nal

Ref. No.62 De 2 JHH

Reaction E or AE <7d E J

"• Notes

Lu175

(7,Y) 3^5 keV oh

5. 16±o .26

X10 10 sec

5/2+

E 2

Ml

Mean lifetime = (lt-.71±0. 10)10“ 10 S ec

u>(0) = l+(-0.20±0.28)P (cos 9 )

Hf

175

( '/»).

[402 f] V

[404l]%.

*» ^

y ./a

0.1613 /

; 3Qfl'

i 1 I 1 * 0.3189 i

' 0.4330 ! '0

1

i 0.2296 fj

|

i

! 0.3434

1 r \

|

1

1 $ 0.(138 si t 1

0.304 7

0 4328

0 3963 0.3434

0.2313

0. 1

1

38

Lu

175

Fig. 1. The decay scheme of Hf*’*. Energies are given in MeV

‘ - - wo rm NSS-418 USCOMM-OC 16S86-P63

u.s. department of commerce

NATIONAL BUREAU OF STANOAROS

PH0T0NUCLEAR DATA SHEET 586
REF.

METHOD

A. Suzuki and K. Shoda

Nucl. Phys. A260 , 172 (1976)

Lu

REF. NO.

|

I z

175 71

76 Su 2 egf

1REACTION result EXCITATION ENERGY

SOURCE DETECT O R ANGLE

TYPE RANGE TYPE RANGE

E.P ABX 11- 20 D 15- 20 MAG-D 125

Proton yields obtained by summing protons with energies above levels given in tables

.

l

* 5 Lu (e.^)

, e«i2Sj* 5 -I0*4

Fig. 5. Cross section of the ,,,Lu(e> e'p) reaction. See also the caption to fig. 2.

Table 4

Tablb 1 Parameters of the present experiment

Target Atomic

number

Purity

CO

Thickness (mg/cm3

)

Lowest proton

energy (MeV)

Bin size (keV) Range of measurement (MeV)

***Tb 63 99.9 (natural) 14.87 4.70 100 13.0 -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 *”La 71 99.S7 (enriched) 5.24 5.34 130 15.05-20.0 *»‘Ta 73 99.9 (natural) 6.73 6.16 200 16.0 -23.0

Tabu 3 Displacement energies obtained from the present data and the estimates with eqs. (20) and (21)

Target Resonance £• £i (exp) V) £,(<5 = 0.3)") (MeV) (MeV) (MeV) (MeV)

“*Tb 1st 15.75±0.15 15.58

16.06 15.93 2nd 16.50 ±0.15 15.46 ‘«Ho 1st 16.15±0.14 15.64 16.38 16.25 '"Tm 1st 15.76±0.13 16.20

16.76 16.63 2nd 16.34±0.14 16.22

l7SLu 1st 16.44±0.13 16.75

17.07 16.93 2nd 17.45±0.15 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 dua derived from the (e. e'p) result

Target Resonance IAS Parent

state ^IAI“V)

(assumed)

<W>

***Tb 1st 1" (521 ] ground —0.008 0.31 OJO

2nd I-I512] 875 keV —0.016 0.29 “*Ho 1st *1031 ground -0.023 0.30 0.28 “*Tm 1st *-[321] ground —0.010 0.29 0.27 2nd *-[5101 565 keV —0.019 0.27

475Lu 1st *-[5141 ground —0.010 0.28 0.27 2nd *-[3031 1420 keV -0.029 0.25

‘•‘Ta 1st *-[5031 670 keV —0.046 0.26 0.21 —“

—— ”“”” I T U.S. DEPARTMENT OF COMMERCE

The assumed deformation parameters for the parent states or are also shown. gg^ national bureau of standards

•) The errors are about ±0.01.
ref. T Bar-Noy and R. Moreh

Nucl. Phys. A288, 192 (1977)

CLEM. SYM. A

Lu 175 71 werHoo REF. NO. 77 Ba 9 egf

REACTION RESULT excitation

ENERGY

SOURCE OETECTOR

ANGLE

TVPC PAN GC TYPf RANGE

G ,6 ABX 8- 12 D 8- 12 SCD-D 140

Abstract: Di.-ierenticl cross sections for elastic and inelastic Roman scattering from ‘' ; Lu •”'& :,1 Ta

were measured. Five photon energies between 8.5 and 11.4 MeV were used and wereobtaiaed from the (n,*/) reaction on Ni and Cr using thermal neutrons, The results are compared wvh

calculations usin S a modified simple rotator model (SRM) of the giant dipole resonance (GDR) m which tne e.tect of Delbruck scattering was incorporated. In general, fair 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 agreement between experimental and predicted

Fig. 4. Elastic and Raman inelastic differential cross sections for 1T, Lu at 140*. The dashed line is calculated using GDR parameters extracted from the photoneutron data of the Saclay group. The

solid line is calculated using GDR parameters extracted from the present photon scattering data

(table 2). The elastic curves include contributions from Thomson, Delbriick, and nuclear resonance

scattering.

renu NSS-411 MIV. 7.I4.A*) UICOMM-NIMC PHOTONUCLEAR DATA SHEET 588

over

U.S. DEPARTMENT OF COMMERCE

NATIONAL IURIAUOF JTANOAAOJ
Fig. 5. Ratios of Raman/elastic scattering cross sections at 1405 for ,r3 Lu and ‘“Ta. R, and R,

refer to the first 3nd 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 /<b/sr) of elastic and Raman inelastic scattering at 0 =» 140*

£ (MeV)

l75 Lu '•‘Ta

elastic /o-i*

Raman 1 »+

. 114 Raman 2

251

elastic /o-i*

Raman 1 §*. 136 Raman 2 *.301

8.33 2.2±1.0 2.0 ±1.0 0.9±0.7 1.8 ±0.7 t" -Mo

r-j

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 1.0 ±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 1.0±0.6

11.39 120 ±20 31 ±7 10 ±5 107 ±15 21 ±8 11 ±8

11.39 *) 131 ±14 17 ±4 17 ±4

*) Experimental results of ref. 3

) (calculated for 140° from measured values at 150°).

3 H.E. Jackson, G.E. Thomas and K.J. Wetzel, Phys. Rev. Cll , 1664 (1975)

589
.

590


ref. Yoshihisa Watanabe, Takeshi Mukoyama

Nucl . Sci. Eng. 80, 92 (1982)

eLEM. SYM.

Lu 176 71

METHOO REF. NO.

82 Wa 4 egf

REACTION RESULT EXCITATION ENERGY

SOURCE OET ECTOR ANGLE TYPE PANOK TYPE Range

G,G/ ABY 1 c 1 .3* ACT1

4PI

A photoexcitation process by gamma rays from a ^Co source has been studied 1~1 .08 MEV , *C0-6Q

for the nuclei of S7Sr, lll Cd, and 1 76Lu. The induced isomeric activity was measured with a Ge(Li) detector. The flux of photons scattered into the target has been estimated with the Monte Carlo method using the single-scattering approximation. From the observed induced activities and the calculated photon flux, the integral cross sections for isomer production by photoexcitation were obtained and compared

with other experimental data.

TABLE II

Integral Cross Sections for the Isomer Production by Photoexcitation (X10‘2S cm: eV)

87Sr lllCd “s ln

l76Lu

Photon

Source Reference

Chcrtok and Booth 0.6 ±0.2 0.71 ± 0.23 Bremsstrahlung 5

Booth and Brownson 0.85^1 1.15 ±0.4 Bremsstrahlung 6

Boivin et al. 3-2 Bremsstrahlung 7

Lakosi et al. 1.02 ±0.26 1.05 ±0.27 "Co 11

Yoshihara 3.0 ±0.8a 1.5 ±0.3 23 ±0.4

69 ± 12* 140 ±30a “Co 3

Veres 0.5 to 0.62 0.8 to 1 .5 0.9 to 5 "Co 23

Present work

4.2 ±0.6b

5.6 ±0.8° 1.1 ±0.2 3.5 ±0.2 39 ± 27b 48 ± 34c "Co

Obtained as the relative value to

lls In. '’Provided that the partial level width #r0 = 1 X l O'

3 eV.

'Provided that the partial level width gT0 = 1 X 10'4 eV.

fOBM NSV41I

[REV. 7.14.441 USCOMM.OC 24010-P44

U.S. DEPARTMENT OF COMMEPC- NATIONAL BUREAU OF STAM0AR3S PHOTONUCLEAR DATA SHEET 593
DEFINITIONS OF ABBREVIATIONS AND SYMBOLS

Note: In this list definitions are given for various photoneutron

reactions in which the following symbols are used: ty, 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 andmass number is listed as the reaction product, e.g. a G.NA22

reaction in 59Co.

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 cross-section per equivalent

CMPT Compton

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 BF3 neutron counter with moderator e.g., Halpern detector, DLTQ momentum transfer

long counter

DST di stribution

BML reduced magnetic radiative

transition probability, B ( ML

)

DT BAL detailed balance

BREAKS levels located by "breaks" in the E electron

yield curve

E/ inelastically scattered

BRKUP breakup • electron

BRMS bremsstrahlung E+ positron

BTW between

continuous. Used to describe a

EDST energy distribution or spectrum

C

E/N used only to indicate a coinci

dence experiment as in ( E , E/N

)

photon source or a detector

594
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 exci ted more specific final states.

F fission LFT excited state lifetime

FMF form factor LIM limit

FM-1 inverse femtometers LY,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 BF3 counter, e.g.

rhodium foil, Szilard-Chalmers

I NT interaction, integral,

intensity

reaction, ^He, ^Li reactions,

GD loaded liquid scintillator.

etc.

INC includes - MSP mass spectrometer

ION ionization chamber

MULT multiple, multi pole, multiplicity

I SOB 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

indicate a reaction in which 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.

I 595
nN where n is any integer. (G,nN)

-indicates the sum over all

reaction cross sections in which

n neutrons are emitted.

NAI Nal(Tl) spectrometer

NEUT neutron(s)

NOX no cross-section data

P proton (see also XP)

PART parti cl e(s)

PHOT photon(s)

PI pi on, usually written as PI+,

PI-, PIO to indicate charge

POL polarized or polarization

Q-SQUAR momentum transfer squared (q2

)

RCL recoi

1

REL rel ati ve

RLI relative integrated crosssection data

RLX relative cross-section data

RSP reaction spectrometer

RLY relative yield data

SCTD scattered

SCD semiconductor (solid state)

detector

SCI scintillator detector other than

Nal, e.g., CsU KI, organic

(liquid or solid), stilbene. He

SEP separation

SEP ISOTP separated isotope used

SIG SIGMA (cross section)

SN sum of neutron producing

reactions, a( y,SN)=a(y,N)

•+ a(y,NP) + a(y,2N) + a(y,3N)

+ etc.

SPC photon or particle energy

spectrum

SPK spark chamber

SPL spallation

STAT statistical

SYM symetric, symmetry

T triton

TEL counter telescope

THR threshold for reaction or threshold detector, e.g.,

29 Si(n,p) 29A1

.

TOF time-of-fl ight detector

TRK tracks of particles or fragments observed in solid

materials (glass, mylar, etc.)

TRNS transition

UKN

UNK

unknown

YIB vibrational -

YIR PHOT virtual photon(s)

XM all neutrons, total neutron

yield, a (y,XN) = a(y,N) + 2 a

(Y,2N) + 3a(y,3N) +a(y,NP) + etc.

XP

% all protons, total proton yield

a (Y,XP) = cr(y

f p) + a(y,NP) + 2a(Y,2P) + etc.

XX

XXX

reaction products defined in

REMARKS

YLD yield

596
a 4 tt geometry was used or a method like radioactivity or a total absorption measurement

energy defined in REMARKS

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.

* or @
HSS-114A (wev. 2-«C) U.S. DEPT. OF COMM. 1. PUBLICATION OR 2. Performing Organ. Report No. BIBLIOGRAPHIC DATA

REPORT NO.

SHEET (See instructions) 4. TITLE ANO SUBTITLE

Photonuclear Data -Abstract Sheets

3. Publication Date

1955-1982

5. AUTHOR(S)

E.G. Fuller and Henry Gerstenberg

S. PERFORMING ORGANIZATION (If joint or other than N 8S, see instruction s) 7. Contract/Grant No. NATIONAL BUREAU OF STANDARDS | DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

1. Type of Report & Period Covered!

10. SUPPLEMENTARY NOTES

|* | Document describes a computer program; SF-185, FlPS Software Summary, is attached.

11. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here)

These abstract sheets cover most classes of experimental photonuclear data leading to

information of the electromagnetic matrix element between the ground and excited states

of a given nucleus. This fifteen volume work contains nearly 7200 abstract sheets and

covers 89 chemical elements from hydrogen through americium. It represents a twentyseven 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 measurement.

For a given reference, the relevant figures and tables are mounted on a separate sheet

for each nuclide studied.

12. KEY WORDS (Si* to twelve entries, alphabetical order; capitalize only proper names; and separate key words by semicolon s) data-abstract sheets, elements, experimental, isotopes, nuclear physics, photonuclear reactions

13. AVAILABILITY

'

I I Unlimited

ITT! For Official Distribution. Oo Not Release to NTIS

?0

rJj2

FrOm Suoerintendcnt of Documents, U.S. Government Printing Office. Washington. D.C

Order From National Technical Information Service (NTIS). Springfield. VA. 22161

14. NO. OF

PRINTED PAGES

IS. Price