I use geant4.10.5 version and I want to alpha production by incident neutron in silicon bulk.
But I run it, the alpha production rate is mismatch near 20 MeV incident neutron. (cross section drop above 20 MeV neutron)
I use FTFP_BERT_HP for Hadron inelastic physics.
I know that Neutron HP only applies below 20 MeV, but I am wondering if cross section can fit well even above 20 MeV.