Japan Charged-Particle Nuclear Reaction Data Group
Division of Physics, Graduate School of Science
Hokkaido University
060-0810 Sapporo, JAPANE-mail: services@jcprg.org
Internet: http://www.jcprg.org/Telephone +81(JPN)-11-706-2684
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Memo CP-E/085
Date:
To:
From:
Subject:
Reference:

January 12, 2006
Distribution
OTSUKA Naohiko
Quantity code for data in arbitrary unit and chain yield (Entry 14044)
CP-D/449, CP-C/368

I am interested in the compilation of entry 14044 (Fig. 2 and 3 of L. Muga and A. Clem, Phys.
Rev. C11 (1975) 1287) discussed in Memo CP-D/449. I can see some general open questions.
14044.002:(92-U-235(N,F),,DE/DE,LF/HF,REL/MXW) in TRANS.1337(92-U-235(N,F),PAR,FY/DE,LF/HF,REL/MXW) in CP-D/449
1) Differential (DE) or partial (PAR) for light fragment kinetic energy?
I prefer the version of TRANS.1337. I understand DE means “number of particles in anenergy bin (with normalization to cross section, yield etc.)”, while PAR means “DEintegrated over a partial energy range (e.g. integrated over a level peak)”. In the case of thissubentry, authors counted heavy fragments by ∆EH=1 MeV bins and light fragments by∆EL=2 MeV bins. Integration is not done for ∆EH bin. Therefore I think this can be regarded
as double differential cross section (,DE/DE) or fission yield (,FY/DE/DE ?) in arbitrary
unit. Note that we use ,DE/DE when double differential cross section for two outgoingparticle energies are given as a function of energies of one particle for fixed energies of theother particle.
2) Cross section or fission yield (FY)?
I think there is probably no difference between cross section and fission yield whenauthors give yield of fission fragment in arbitrary unit, because two quantities, “isotopicfission fragment production cross section σfis (Z, A)” and “isotopic fission fragment
production yield Y (Z, A)”, are related by σfis (Z, A) = σfis Y (Z, A), where σfis is fission crosssection for a given projectile and target at an incident energy and Y(Z, A) is normalized to 2for binary fission. We often meat similar ambiguity when compilation of data given underarbitrary unit (SIG or PY? SIG or FY? DE or SPC? ...). Clarification of coding rule may benecessary.

14044.003:(92-U-235(N,F)MASS,,DE,LF,REL/MXW) in TRANS.1337(92-U-235(N,F)MASS,PAR/MAS,FY,LF,REL/MXW) in CP-D/449
In addition to same question 1) and 2) for subentry 2, I have one additional question:
Branch code MAS (Total mass for yields of fission fragments)
There are various codes for fission yield Y(A), for example,
A (92-U-235(N,F)MASS,PRE,FY)
B (92-U-235(N,F)MASS,SEC,FY)
C (92-U-235(N,F)MASS,CHN,FY)
D (92-U-235(N,F)MASS,MAS,FY)
It looks like that A and B are used for chain yield when information of fission stage (primaryor secondary) is available from literatures while C is used for chain yield when fission stage
is uncertain. But I do not see right answer in our manual. I do not understand the difference
between C and D. Branch code MAS is used in two subentries (A0108.245 and 13981.002). I
think difference among these codes should be clarified.

Fig. 2 (002) and 3 (003) of L. Muga and A. Clem, Phys. Rev. C11 (1975) 1287

Distribution:
S. Babykina, CAJaD
S. Dunaeva, NDS
H. Henriksson, NEA-DB
M. Lammer, NDS
V. McLane, NNDC
P. Obložinský, NNDC
D. Rochman, NNDC
T. Tárkányi, ATOMKI
H.W. Yu, CNDC

J.H. Chang, KAERI
Z.G. Ge, CNDC
A. Kaltchenko, KINR
Y.O. Lee, KAERI
A.Mengoni IAEA
Y. Ohbayasi, JCPRG
O. Schwerer, NDS
V. Varlamov, CDFE
V. Zerkin, NDS

M. Chiba, JCPRG
O. Gritzay, KINR
J. Katakura, JAEA
S. Maev, CJD
M. Mikhaylyukova, CJD
A. Ohnishi, JCPRG
S. Tákacs, ATOMKI
M. Vlasov, KINR
Y.X. Zhuang, CNDC

F.E. Chukreev, CAJaD
A. Hasegawa, JAEA
K. Katō, JCPRG
V.N. Manokhin, CJD
C. Nordborg, NEA-DB
V. Pronyaev, CJD
S. Taova, VNIIEF
M. Wirtz, NDS
EXFOR, NEA-DB