Measurements of neutron angular distributions from the 7Li(p, n)7Be reaction

The absolute zero-degree differential cross sections of the 7Li(p, n0)7Be and the 7Li(p, n1)7Be reactions have been measured with a time-of-flight spectrometer at 0.1 MeV intervals from 2.20 to 5.50 MeV. Angular distributions of neutrons from both reactions were also measured at 0.2 MeV intervals from 2.60 to 5.40 MeV for the n0 neutron group and from 3.20 to 5.40 MeV for the n1 group. Absolute differential cross sections were obtained by normalization to the zero-degree measurement. The centre-of-mass distributions were fitted with a Legendre polynomial series. Total cross sections were obtained by integrating the angular distributions. The comparison between present and previous results has revealed some disagreement in the shapes of angular distributions and in the magnitude of total cross sections for the 7Li(p, n1)7Be reaction. © 1972.