Neutron scattering from elemental uranium and thorium

Differential neutron-scattering cross sections of elemental uranium and thorium are measured from ~4.5 to 10.0 MeV in steps of ~0.5 MeV. Forty or more differential values are obtained at each incident energy, distributed between::; 17 and 160°. Scattered-neutron resolutions are defined to encompass contributions from the first four members of the ground-state rotational band (0+ g.s., 2+, 4+ and 6+ states). The experimental results are interpreted in the context of coupled-channels rotational models, and comparisons made with the respective ENDF/B-VI evaluated files. These comparisons suggest some modifications of the ENDF/B-VI 238U and 232Th evaluations