Predicted levels of 9Be based on a theoretical analysis of neutron double-differential cross sections at En=14.1 and 18 MeV

By using the statistical theory for neutron-induced light nucleus reaction, the calculation of the neutron double-differential cross sections for n+9Be reactions is performed. The secondary outgoing neutrons only coming from the (n,2n)2α reaction channel through six different emission processes are illustrated in detail in this article. Based on the theoretical analysis of neutron double-differential cross sections at En=14.1 and 18 MeV, two predicted levels of 9Be, i.e., E(Jπ)Γ=9((5/2)+)1000 and 10((5/2)+)1000, have been recommended. The calculated results indicate that the fittings would be improved obviously while the predicted levels have been employed.