Abstract
By bombarding a thin deuterium gas target with deuterons 4.5- and 5.5-Mev neutrons were produced. Deuterons recoiling from neutron collisions in (a) a thin heavy paraffin scatterer and (b) a gas sample were detected by a double coincidence counter telescope. The angular distribution of recoiling deuterons, measured from 0\ifmmode^\circ\else\textdegree\fi{} to 60\ifmmode^\circ\else\textdegree\fi{} in the laboratory system, shows a sharp maximum for neutron scattering at 180\ifmmode^\circ\else\textdegree\fi{} with a minimum at approximately 110\ifmmode^\circ\else\textdegree\fi{} in the center-of-mass system. The ratio of the differential cross section at 180\ifmmode^\circ\else\textdegree\fi{} to that at 110\ifmmode^\circ\else\textdegree\fi{} is 5:1 for both energies. The experimental curves are compared with the theory of Buckingham and Massey.
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