Theoretical Analysis of Neutron Double-Differential Cross Sections of n + 9Be Reactions

By using the nuclear reaction model for light nuclei, the calculations of the double-differential cross sections of outgoing neutrons from n + Be-9 reactions are performed. The total outgoing neutrons are only come from the (n, 2n)2 alpha reaction channel. The (n,2n)2 alpha reaction channel is achieved through six different reaction approach, which are illustrated in this paper. The calculated results agree very well with the measured data at E-n = 7.1, 8.09, 8.17, 9.09, 9.97 and 10.26 MeV, because the updated level schemes related to the n + Be-9 reactions have been employed in this calculations.