Calculation of the Neutron Spectra from Proton-Nucleus Nonelastic Collisions in the Energy Range 15 to 18 MeV and Comparison with Experiment

The energy distribution of neutrons from proton-nucleus nonelastic collisions for 18-MeV protons on ¹⁴N, ²⁷Al, ⁵⁶Fe, ¹⁸¹Ta, and ²⁰⁸Pb and for 15-MeV protons on ²⁷Al and ²⁰⁸Pb have been calculated with the intranuclear-cascade-evaporation model of nuclear reactions and with the evaporation model of nuclear reactions. Comparisons between the calculated neutron spectra and experimental data are presented, and it is shown that neither model is entirely reliable in the energy region considered but that the intranuclear-cascade-evaporation model is the more reliable of the two.