The Scattering of Neutrons of Energy between 12.0 Mev and 13.0 Mev by Protons

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Abstract
The angular distribution of the recoil protons projected during the scattering of neutrons by protons has been investigated in a methane-filled, high pressure cloud chamber. A deuterium gas target bombarded with 10 Mev deuterons provided the high energy neutron source. The spectrum of the neutrons from this source, which entered the cloud chamber through a collimator, was surveyed and showed a group of high energy neutrons superimposed on a continuous background. Examination of the data with rigorous selection criteria to determine those recoils projected by the scattering of neutrons between 12.0 Mev and 13.0 Mev yielded a total of 1573 recoil protons. The azimuthal and recoil angle distributions of these protons have been analyzed. A ratio of the differential cross sections for neutron scattering in the backward direction to scattering in a direction perpendicular to that of the incident neutron beam, of unity (spherically symmetric scattering) or slightly greater than unity can be consistent with these data.

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