Angular Distribution of 14-Mev Neutrons Scattered by Protons

By bombarding a tritium target with 200-kev deuterons, 14-Mev neutrons were produced. Proton recoils originating in a thin polythene radiator could pass through three proportional counters between which coincidences were observed. By rotating the foil and the counter about the center of the foil the angular distribution of the recoiling protons could be measured. Protons corresponding to neutrons scattered through 90^∘{}, 120^∘{}, 150^∘{}, and 180^∘{} in the CM system were observed. Within the statistical accuracy of about 6 percent at each angle the angular distribution of the scattered neutrons appeared isotropic.