Neutron-Proton Scattering at 27 Mev

Abstract

Monoenergetic neutrons of energy 27.2 Mev were produced by 10-Mev deuterons incident on a gaseous tritium target. Protons recoiling from the neutrons were observed in a fourfold coincidence proportional counter telescope. The angular distribution of neutrons scattered through angles in the range from 180\ifmmode^\circ\else\textdegree\fi{} to 76\ifmmode^\circ\else\textdegree\fi{} in the CM system was measured. The observed ratio of scattering at 180\ifmmode^\circ\else\textdegree\fi{} to that at 90\ifmmode^\circ\else\textdegree\fi{} was 1.28\ifmmode\pm\else\textpm\fi{}0.10.