Fission Product Yields
For experimental fission-product yield data see
EXFOR; this now
includes most of the data compiled earlier in separate files by
Crouch and Meek/Rider.
There are three major files for evaluated fission-product yield data
for a large number of "fissioning systems", i.e. actinides
fissioning
by thermal neutrons, fast neutrons, 14 MeV neutrons, or spontaneous
fission.
The neutron-induced fission yield data of these files are accessible online
from our
ENDF page or
through our Nuclear Data Information
System. Note:To retrieve fission product yields from
either system,
"N/FPY" has to be entered in the projectile field.
Compilation and evaluation of fission yield nuclear data
Handbook IAEA-TECDOC-1168 (December 2000). Final report of a Co-ordinated Research
Project 1991-1996. The appendices contain voluminous tables and also a computer
program YCALC for calculating fission yields and are enclosed as a CD-ROM.
Limited number of copies available cost-free to scientists from developing
countries upon request.
ENDF/B-6 fission-product yield data
This is a separate ENDF/B-6
sublibrary which was released in September 1991 and updated in
June 1993 and May 1995. It has two parts: one part for neutron
induced fission, another part for spontaneous fission.
Summary see document IAEA-NDS-106 Rev. 3.
JEF-2/FPY
the JEF-2 fission-product yield data library by the
NEA Data Bank, in ENDF-6 format. The evaluated data have been taken
over from UKFY2, the UK fission-product yield data library by
M. James and R. Mills. Brief summary: IAEA-NDS-123 Rev. 1.
Size: 46 000 records, available on tape. - The original UKFY2
file (see below) contains supplementary information such as chain
yields, fractional independent yields, and bibliographic
references: available on tape.
JENDL-3.2/FPY
the JENDL fission-product yield data library, has
been compiled by T. Nakagawa in ENDF-6 format. The evaluated
data have been taken over from JNDC-FP2, a special format data
library (see below) documented in the reports JAERI-M-89-204
(1989) and JAERI-1320 (1990). Available on tape.
The ENDF/B-6 fission-product yield data are largely based on the
following:
"BRADY"
Fission-product yields and fission-neutron data for minor
actinides, by M.C. Brady, R.Q. Wright, T.R. England, 1991. A set
of two PC diskettes.
The JEF-2 fission-product yield data are largely based on the
following:
UKFY2
the UK Fission-Product Yield Library, version 2, 1991.
Summary see document IAEA-NDS-124.
For some fissioning systems that are not included in above data
libraries the following file should be used which has been obtained
from a theoretical thermodynamical model:
ASIYAD
Fission-product yield library by A.F. Grashin reported at the
1988 Mito Nuclear Data Conference, and converted to ENDF-6 format
by the Russian Nuclear Data Center, Obninsk.
Summary see document IAEA-NDS-133.
Additional files which may still be in use and which may continue to
be of interest for comparison purposes:
JNDC-FP2: The JNDC Nuclear Data Library of Fission-Products,
version 2, including fission-yield data for 20 fissioning
systems. For further information see under
Fission
Product Cross Section and Decay Data .
Summary document IAEA-NDS-51 Rev. 3.
Chinese evaluated fission product yield library by Wang Dao
et al.,1987. Summary see document IAEA-NDS-91.
ENDF/B-5 Fission-Product Yield data for 11 fissioning nuclides;
latest version received in 1985.
Summary documentation: IAEA-NDS-62.
Additional specialized compilations:
Delayed fission-neutron yield data: see report NEACRP-L-323 (Dec.
1990) J. Blachot, M.C. Brady, A. Filip, R.W. Mills, D.R. Weaver,
Status of delayed neutron data 1990. Data file not available on
tape.
Review of fission product yields and delayed neutron data for
selected actinides. Report NEANDC-300 by R.W. Mills. July 1990.
Importance of delayed neutrons in nuclear research, by S. Das.
Report BARC/1993/E-003 (1993) and journal Progress in Nuclear
Energy vol. 28 No. 3 (1994) p. 209-264.