Semiclassical Description of Fast-Neutron Cross Sections

The predictions of a semiclassical optical model are compared with experimental nonelastic, integrated elastic-, and differential elastic-scattering cross sections at 14 MeV in a wide mass number range. Considering the simplicity of the model, the agreement is fairly satisfactory using a single pre-fixed parameter set; the only modification that had to be performed was the introduction of a mass-number-dependent nuclear radius parameter, r₀(A), instead of the constant initial value. The simple analytical expressions are especially useful for quick estimation of unmeasured cross sections.