Evaluation of neutron nuclear data on Hafnium isotopes for JENDL-4

Neutron nuclear data on 174,176,177,178,179,180,181,182Hf have been evaluated for the evaluated nuclear data library JENDL-4 in the energy region from 10-5 eV to 20 MeV. The resolved resonance parameters of the previous library JENDL-3.3 were updated by considering recent measurements. The statistical model was applied to calculate the cross sections above the resolved resonance region. Neutron transmission coefficients were obtained by the coupled-channel method, together with the total cross sections, the shape elastic scattering cross sections, and the direct-reaction components of inelastic scattering cross sections. Preequilibrium and direct-reaction processes were taken into account in addition to the compound process. The present evaluation is almost consistent with available experimental data, and it is compiled into JENDL-4. (author)