Nuclear Data Section
International Atomic Energy Agency
P.O.Box 100, A-1400 Vienna, Austria
Memo CP-D/587
Date:
To:
From:

18 September 2009
Distribution
N. Otsuka, O. Schwerer, S. Taova, S. Dunaeva

Subject:

LEXFOR entry “Partial Reactions” and “Secondary Particles”

The following updates of LEXFOR entry “Partial Reactions” are proposed in order to(1a) describe partial reaction defined by outgoing particle energy as a secondaryenergy;(1b) describe difference of level energy and excitation energy (though theirboundary is not sharp;(1c) delete one sentence about excitation function which is also possible for sum ofpartial reaction;(2) put an example of partial reaction in the explanation of EN-SEC;(3) clarify when EN-SEC must be coded.

(1) Proposed deletion (strike line) and addition (underline) to LEXFOR “PartialReactions”….
Definition: A partial reaction, as defined for EXFOR, is a reaction leading to orproceeding through a specific level or emitting a specific gamma or particle group,and excludes isomeric states (see Isomeric States). An excitation function is theenergy dependence of a partial reaction cross section leading to the excitation of adiscrete level or to the production of a particular radiation or particle group.
REACTION Coding: PAR in SF5 (Branch)
Example: (…(N,INL)…,PAR,SIG)
The energy must be given in the COMMON or DATA section under a secondaryenergy data heading (Family E), e.g., E-EXC, E-LVL, E.
Partial reactions leaving the residual nucleus (reaction product) in an excitedstate.
The excited state is defined by specifying one, several or a range of:• level energies (default is level energy of reaction product in discrete level)•…

excitation energies (default is excitation energy of reaction product in broad orcontinuum level)(2) Proposed correction (underline) to LEXFOR “Partial Reactions”…
When the data is a function of the secondary energy of more than one secondary
particle, the secondary energies for the particles must be defined under the
information-identifier keyword EN-SEC (see EXFOR Exchange Formats Manual
Chapter 7: EN-SEC and Secondary Particles).
Example: REACTION (8-O-16(6-C-12,INL)8-O-16,PAR,DA)
EN-SEC(E-LVL1,6-C-12)(E-LVL2,8-O-16)(3) Proposed deletion (strike line) correction (underline) to LEXFOR “SecondaryParticles”
2. The information-identifier keyword EN-SEC may be used:• to specify to which reaction product the secondary energy given in theCOMMON or DATA section refers. (See EXFOR Exchange Formats Manual
Chapter 7: EN-SEC). This keyword must always be coded when the data heading
E1, E2, etc., are used. it is not evident to which reaction product the secondary
energy refers, e.g. because more than one particle is specified in SF3 and/or SF7,or when the data is a function of the secondary energy of more than one
secondary particle.

Distribution:
blokhin@ippe.ru
chiba@earth.sgu.ac.jp
claes.nordborg@oecd.org
emmeric.dupont@oecd.org
ganesan@barc.gov.in
gezg@ciae.ac.cn
hasegawa@nea.fr
henriksson@near.fr
hongwei@ciae.ac.cn
jhchang@kaeri.re.kr
kaltchenko@kinr.kiev.ua
katakura.junichi@jaea.go.jp
kato@nucl.sci.hokudai.ac.jp
kirarlyb@atomki.hu
l.vrapcenjak@iaea.org
manuel.bossant@oecd.org
manokhin@ippe.ru
mmarina@ippe.ru
mwherman@bnl.gov
nicolas.soppera@oecd.org
nklimova@kinr.kiev.ua

n.otsuka@iaea.org
nrdc@jcprg.org
oblozinsky@bnl.gov
ogritzay@kinr.kiev.ua
otto.schwerer@aon.at
r.forrest@iaea.org
samaev@obninsk.ru
s.babykina@polyn.kiae.su
scyang@kaeri.re.krs.dunaeva@iaea.org
stakacs@atomki.hu
stanislav.hlavac@savba.sk
taova@expd.vniief.ru
tarkanyi@atomki.hu
varlamov@depni.sinp.msu.ru
vlasov@kinr.kiev.ua
vmclane@optonline.net
v.pronyaev@iaea.org
v.zerkin@iaea.org
yolee@kaeri.re.kr