U‐Th Fuel Cycle Neutron Data

Fission, capture, (n,xn), neutron elastic and inelastic scattering, and total data for the 232Th, 232,233,234U, and 231,233Pa, when available, are described within a Hauser‐Feshbach‐Moldauer theory and coupled‐channel optical model. For even targets direct excitation cross sections for quadrupole and octupole vibration band levels are calculated with a soft rotator model. Prompt fission neutron spectra are calculated with the model that takes into account contribution of the neutrons, emitted in the (n,xnf) reaction. Exclusive pre‐fission (n,xnf) neutron spectra are calculated using Hauser‐Feshbach theory. Local minima of the average prompt‐fission neutron‐spectra energies around (n,nf) and (n,2nf) thresholds are predicted. Evaluated data files are produced.