Evaluation of neutron nuclear data on Arsenic-75 for JENDL-4

Shibata, Keiichi; Chiba, Go; Ichihara, Akira ; Kunieda, Satoshi  

Neutron nuclear data on have been evaluated for the evaluated nuclear data library JENDL-4 in the energy region from eV to 20 MeV. The thermal capture cross section was updated by considering recent measurements. The statistical model was applied to calculate the cross sections above the resolved resonance region. In the calculation, coupled-channel optical model parameters were used for neutrons. Pre-equilibrium and direct-reaction processes were taken into account in addition to the compound process. The present calculations are almost consistent with available experimental data. The measured leakage neutron spectrum is well reproduced by using the presently evaluated data at 14 MeV. The evaluated data will be compiled into JENDL-4.