Calculation of n+Th Reaction Cross Sections in the En≤20 MeV Energy Range

Consistent calculation and analysis of neutron scattering data of Th with optical model, semiclassical model includes both the Hauser-Feshbach theory and the exciton model, and the coupled channel theory is carried out in the En≤20 MeV energy range based on the experimental data of total, nonelastic-scattering, fission, and other reaction cross section and elastic-scattering angular distributions. Especially, the analysis includes the elastic and inelastic scattering angular distribution, the inelastic scattering cross sections of discrete levels, the prompt fission neutron spectra, the double differential cross section and the angle-integrated spectra for neutron emission. Theoretical calculations are compared with recent experimental data and other evaluated data from ENDF/B6 and JENDL-3.