Scattering of 1-Mev Neutrons by Intermediate and Heavy Elements

Differential cross sections for elastic scattering of 1-Mev neutrons from 28 intermediate and heavy elements were measured at intervals of 15^∘{} from 30^∘{} to 150^∘{}. The angular distributions of neutrons scattered by neighboring elements have similar shapes, while those of elements with appreciably different atomic weight show marked differences. For all elements forward maxima were found, and elements with atomic weight below 140 exhibited additional maxima for scattering through 180^∘{}. Maxima at about 110^∘{} were observed for elements with atomic weight near 200. From the elastic scattering cross sections, inelastic collision cross sections, and transport cross sections were obtained.