Calculation of the Photon-Production Spectrum from Proton-Nucleus Collisions in the Energy Range 15 to 150 MeV and Comparison with Experiment

Calculations of the differential photon-production cross sections from proton-nucleus collisions in the energy range 15 to 150 MeV have been carried out and compared with experimental measurements on ¹²C, ¹⁶O, ²⁷Al, and ⁵⁶Fe. The calculations are based on the intranuclear-cascade-evaporation model of nuclear reactions and simple assumptions about the deexcitation of excited nuclei. The calculated total photon-production cross sections are within roughly a factor of two of the experimental values, but the calculated photon spectra are not in good agreement with the experimental spectra.