The scattering of D-D neutrons

The scattering cross-sections for the combined processes of absorption and inelastic scattering of D-D neutrons have been measured in 24 elements. Phosphorus, in which the 170-min. period of 31 Si was induced, was used to detect the neutrons, which had an energy of 3.25 MeV. The results obtained corroborate the conclusions of Kikuchi and Aoki; the cross-section does not increase monotonically with atomic number, but rather shows a periodic dependence on atomic number. Using phosphorus as detector (threshold excitation energy about 2 MeV.), it was not possible to observe elastic scattering of D-D neutrons.