Evaluation of neutron nuclear data for erbium

Shibata, Keiichi

Neutron nuclear data on Er have been evaluated for the next release of JENDL general purpose file in the energy region from 10 eV to 20 MeV. The resolved resonance parameters remain unchanged from JENDL-4.0, while the unresolved resonance parameters were revised. The statistical model was applied to calculate the cross sections above the resolved resonance region. In the calculations, coupled-channel optical model parameters were used for neutrons. Preequilibrium and direct-reaction processes were taken into account in addition to the compound process. The present evaluation is consistent with available experimental data. The evaluated results are compiled into an ENDF-formatted data file.