Program - Brookhaven National Laboratory

Session LE Evaluated Nuclear Data Libraries
Wednesday March 6, 2013
Room: Central Park West at 3:30 PM
LE 1 3:30 PM
Development of JENDL Decay and Fission Yield Data Libraries
Jun-ichi Katakura
Nagaoka University of Technology
The decay and fission yield data of fission products have been developed for decay heat calculation as
JENDL (Japanese Evaluated Nuclear Data Library) family as JENDL/FPD-2011 and JENDL/FPY-2011.
The data in the previous decay data file, JENDL FP Decay Data File 2000, have been updated based
on the ENSDF (Evaluated Nuclear Structure Data File) data file. Newly measured decay energy values
by TAGS (Total Absorption Gamma-ray Spectroscopy) method have been incorporated into the file. The
fission yield data have been updated from the data in the JENDL-4 library. The main change came from
the change of decay chains adopted in the decay data file. The number of nuclides are kept consistent
between the decay data file and the fission yield file. The decay heat calculations were performed using the
both updated data and compared with some measured decay heat data. The uncertainty analyses were
also performed and have given the uncertainties. The components of the uncertainties were also identified
from the uncertainty analyses. Similar uncertainty analyses were applied to the calculations using the
ENDF and JEFF files. Their comparison with those of the JENDL library was also shown.
LE 2 4:00 PM
Table of E0 Electronic Factors for Conversion Electron Probabilities
T. Kibédi
Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National
University, Canberra, ACT 0200, Australia
G. Gosselin, V. Meot, M. Pascal,
CEA, Serv. Phys. Nucl., Dept. Phys. Theor. & Appl, F-91680 Bruyeres Le Chatel, France
A.E. Stuchbery
Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National
University, Canberra, ACT 0200, Australia
The accurate knowledge of conversion coefficients is essential to evaluate total electromagnetic transition
rates and to normalize decay schemes. The new theoretical conversion coefficient tables [1,2,3] represent a
major improvement in terms of accuracy and coverage for elements between Z = 5 and 126. On the other
hand, there is no universal table available yet for electric monopole (E0) transitions connecting states with
the same spin–parity. In this paper we report on the tabulation of Ω(E0) electronic factors for electron
conversion in Z = 2 to Z = 96 elements and all possible s 1/2 and p 1/2 atomic shells. The calculations
have been carried out with a modified version [4] of the relativistic Hartree–Fock–Slater method developed
by Pauli and Raff [5]. The data tables presented here cover transition energies from 1 keV up to 6000
keV, similar to our recent ICC tabulations. In contrast to the internal conversion coefficients, the Ω(E0)
electronic factors, can not be directly determined experimentally. Instead, the ratios of Ω(E0) values,
which are proportional to the ratios of the corresponding conversion electron intensities, can be compared
to theoretical ratios. A list of 80 experimental Ω(E0) ratios are presented in the first time for transitions in
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