The p,n channel opening for the 111Sn+p reaction is at 5.8895 MeV/u beam energy. Therefore, when choosing as 6MeV/u, 7MeV/u, 8MeV/u beam energies, there is not much kinetic energy left for the outgoing neutron --> there are "less" nuclear levels populated above groundstate in 111Sb, they can be handled explicitly. My simulations are based on TALYS results. The following steps did I made:

1, choose an energy for the 111Sn beam. for this example let it be 8AMeV.