https://doi.org/10.1051/epjconf/201714602049
Evaluation of neutron total and capture cross sections on 99Tc in the unresolved resonance region
1 Nuclear Data Center, Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
2 Laboratory for Advanced Nuclear Energy, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan
a e-mail: iwamoto.nobuyuki@jaea.go.jp
Published online: 13 September 2017
Long-lived fission product Technetium-99 is one of the most important radioisotopes for nuclear transmutation. The reliable nuclear data are indispensable for a wide energy range up to a few MeV, in order to develop environmental load reducing technology. The statistical analyses of resolved resonances were performed by using the truncated Porter-Thomas distribution, coupled-channels optical model, nuclear level density model and Bayes' theorem on conditional probability. The total and capture cross sections were calculated by a nuclear reaction model code CCONE. The resulting cross sections have statistical consistency between the resolved and unresolved resonance regions. The evaluated capture data reproduce those recently measured at ANNRI of J-PARC/MLF above resolved resonance region up to 800 keV.
© The Authors, published by EDP Sciences, 2017
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