Nuclear Data Section
International Atomic Energy Agency
P.O.Box 100, A-1400 Vienna, Austria

Memo CP-D/434

Date:
To:
From:

10 May 2005
Distribution
S.Dunaeva, O.Schwerer

Subject:

Energy spectrum as function of sum of kinetic energies of several particles(Addition to Dictionary 36 and to LEXFOR)The following code is proposed for inclusion in dictionary 36:
Quantity,DE,N/N/A

Independent Variable
E

Unit dimension
DE

Reference
NP/A,700,3,2002,DE,N/N/A – Energy spectrum as a function of the sum of kinetic energies of alpha particle
and two neutrons.
The secondary energy is to be defined under EN-SEC:
EN-SEC(E,N/N/A) – sum of kinetic energies of alpha particle and two neutrons

Many experiments were done in this specific manner:(J,NP/A,700,3,2002) (see example entry, Appendix 2)(J,NP/A,633,234,1998)(J,NP/A,679,462,2001), etc.
(In all these publications the excitation-energy spectrum was reconstructed from themeasured momenta of the two neutrons and the alpha particle after dissociation.)
Since this is a new type of energy distribution, an addition to the LEXFOR page on
Differential Data is proposed as well (Appendix 1).
An example entry is given as Appendix 2.
Distribution:
oblozinsky@bnl.gov
vml@bnl.gov
drochman@bnl.gov
nordborg@nea.fr
manokhin@ippe.obninsk.ru

samaev@obninsk.ru
Mmarina@ippe.obninsk.ru
blokhin@ippe.obninsk.ru
feliks@polyn.kiae.su
chukreev@polyn.kiae.su

S.Dunaeva@iaea.org
taova@expd.vniief.ru
varlamov@depni.sinp.msu.ru
chiba@earth.sgu.ac.jp
kato@nucl.sci.hokudai.ac.jp
ohnishi@nucl.sci.hokudai.ac.jp
oba@nrdf.meme.hokudai.ac.jp
yxzhuang@iris.ciae.ac.cn
gezg@iris.ciae.ac.cn
hongwei@iris.ciae.ac.cn
tarkanyi@atomki.hu
stakacs@atomki.hu
katakura@ndc.tokai.jaeri.go.jp
hasegawa@ndc.tokai.jaeri.go.jp
vlasov@kinr.kiev.ua
kaltchenko@kinr.kiev.ua
ogritzay@kinr.kiev.ua
jhchang@kaeri.re.kr
ohtsuka@nucl.sci.hokudai.ac.jp
m.wirtz@iaea.org
schwerer@iaeand.iaea.org
v.zerkin@iaea.org
henriksson@nea.fr
exfor@nea.fr

Appendix 1
Proposed addition of new item 5. to page D.12 of LEXFOR page Differential Data
Secondary Energy Distributions
1. Energy distribution: probability for a particle to be emitted with a given energy E΄ or in agiven energy range E min to E max ; given as σ(E΄) = dσ/dE. The data are given in units of crosssection per unit of secondary energy (e.g., mb/MeV).
REACTION coding: DE in SF6.
Unit type: DE (e.g., B/MEV)
2. Energy distribution for a correlated pair: Probability that a particle a and a particle b will beemitted at a relative energy E rel , usually given as the center-of-mass energy of the relative
motion of the correlated pair:
REACTION coding: DE in SF6; particles in SF7 as a+b (e.g., P+A).
Unit type: DE (e.g., B/MEV)The energy is given under the data heading E-RL-CM
3. Linear momentum distribution: probability for a particle to be emitted with a given
momentum p΄; given as σ(p΄) = dσ/dp. The data are given in units of cross section per unit ofsecondary linear momentum (e.g., mb/MeV/c).
REACTION coding: DP in SF6.
Unit type: DA (e.g., MB/MEV/C)
Example:(……(N,X)……,LP,DP)

longitudinal momentum distribution of emitted particles.

The linear momentum is given under the data heading MOM-SEC.
4. Linear momentum distribution for a correlated pair: Probability that a particle a and aparticle b will be emitted at a mean linear momentum p m or a relative linear momentum p rel .
REACTION coding: DP in SF6; particles in SF7 as a+b (e.g., P+A).
Unit type: DP (e.g., MB/MEV/C)
The linear momentum is given under the heading MOM-SEC-MN or MOM-SEC-RL.
5. Energy distribution as a function of the sum of kinetic energies of several particles:
Probability that particles a and b, or particles a, b, and c, will be emitted with a total kinetic
energy E.
REACTION coding: DE in SF6; particles in SF7 as a/b/c (e.g., P/A/A).
Unit type: DE (e.g., B/MEV)Appendix 2
ENTRY
SUBENTBIB
TITLE
AUTHOR

INSTITUTE
REFERENCE
FACILITYSAMPLE
DETECTORSTATUSHISTORY
ENDBIBNOCOMMONENDSUBENTSUBENT
BIB
REACTIONSAMPLE
EN-SECCOMMENTENDBIB
COMMON
EN
MEV/A
240.
ENDCOMMON
DATA
E
MEV
1.125
1.275
1.425
……….
……….
9.825
9.975
10.125ENDDATAENDSUBENTENDENTRY

D0172
20050404
D0172
D0172001
20050404
D0172
932
D0172
8He-6He: A comparative study of electromagnetic
D0172
fragmentation reactions
D0172(M.Meister, K.Markenroth, D.Aleksandrov, T.Aumann,
D0172
T.Baumann, M.J.G.Borge, L.V.Chulkov, D.Cortina-Gil,
D0172
B.Eberlein,Th.W.Elze,H.Emling,H.Geissel,M.Hellstrom,
D0172
B.Jonson, J.V.Kratz, R.Kulessa, A.Leistenschneider,
D0172
I.Mukha, G.Munzenberg, F.Nickel, T.Nilsson, G.Nyman,
D0172
M.Pfutzner, V.Pribora, A.Richter, K.Riisager,
D0172
C.Scheidenberger, G.Schrieder, H.Simon, O.Tengblad,
D0172
M.V.Zhukov)
D0172(2SWDCTH,2GERTHD,4RUSKUR,2GERGSI,2SPNSPN,2SPNSAU,
D0172
2GERMNZ,2GERFRK,3POLUJK,2ZZZCER,2DENAAU)
D0172(J,NP/A,700,3,2002)
D0172(J,NP/A,633,234,1998) Tech. details.
D0172(SYNCH,2GERGSI) The heavy-ion synchrotron at GSI.
D0172
The experiments were carried out at the
D0172
ALADIN-LAND setup.
D0172(PRJFS,2GERGSI)The secondary beam of 227 MeV/u 8He
D0172
and 240 MeV/u 6He was produced in a 8 g/cm2 beryllium D0172
production target from a primary beam of 180 with
D0172
an energy of 340 MeV/u. The 8He or 6He nuclei
D0172
were separated out from the primary reaction
D0172
products using the fragment separator FRS.
D0172
Pb targets of thickness 0.387 g/cm2 and 0.87 g/cm2
D0172
were used for 8He and 6He, respectively.
D0172(PSSCN) The selected events for the 8He breakup wereD0172
coincidences between 6He and neutrons, detected in the D0172
large area neutron detector, LAND, while alpha-neutron D0172
coincidences were selected for 6He.
D0172
(TABLE) Tables received from Dr. L.V.Chulkov
D0172(APRVD) Entry was approved by Dr. M.Meister
D0172(20050404C) SD
D0172
320
D0172
00
D0172
350
D0172
D0172004
20040929
D0172
47
D0172
(82-PB-208(2-HE-6,2N+A)82-PB-208,,DE,N/N/A)
D0172
Pb targets of thickness .87 g/cm2
D0172(E,N/N/A)
D0172
The 6He excitation-energy (Ex) spectrum reconstructed D0172
from measured momenta of the two neutrons andD0172
the alpha particle after dissociation
D0172
of 240 MeV/u 6He in a lead target.
D0172
70
D0172
13
D0172
D0172
D0172
D0172
30
D0172
361
D0172
DATA-CM
DATA-ERR
D0172
MB/MEV
MB/MEV
D0172
1.2
1.2
D0172
14.7
3.6
D0172
25.4
5.8
D0172

40.1
45.2
39.5

17.5
14.9
15.5
63
79
1100
00
11112131415161
718
191
101111121
13114115116117118119120121122123124125126127128129130131132133134135
136199999
4142434445464748494104
114
124
134
144
154164
174
184
194
20
421

D0172 477
D0172 478
D0172 479
D0172 480
D0172 499999
D017299999999