Back-Angle Elastic Scattering of 14.6-Mev Neutrons

Abstract

Differential elastic scattering cross sections have been obtained for 14.6-Mev neutrons on Fe, Ag, Cd, Sn, and Pb in 5\ifmmode^\circ\else\textdegree\fi{} steps from 90\ifmmode^\circ\else\textdegree\fi{} to 167\ifmmode^\circ\else\textdegree\fi{}. Time-of-flight techniques and one-meter radius rings were used to reduce background, obtain reasonable counting rates, and preserve angular resolution. Optical model calculations by Bjorklund and Fernbach indicate that a spin-orbit coupling term is needed to fit the data.