(p,n) and (p,pxn) reactions in 127I

Abstract

Absolute values of the cross sections of (p,n), (p,pn), (p,p2n), and (p,p3n) reactions in 127I have been measured by radiochemical methods for incident proton of energies up to 80 MeV. The initial portion of the excitation function for the (p,n) reaction is characteristic of the compound nucleus mechanism, but evidence for direct interaction is present at higher energies. Above 50 MeV, cross sections are close to the predictions of Monte Carlo calculations based on the cascade–evaporation model. This is particularly true in the case of the (p,pn) and (p,p2n) reactions.