Energy Dissipation Process for 100-MeV Protons and the Nucleon-Nucleon Interactions in Nuclei

Coincidence studies of two protons emitted from $p$+${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$ at 100 MeV have been carried out. The proton spectra in coincidence with scattered protons suffering an average energy loss of 60 MeV are similar to those resulting from 60-MeV incident protons. This suggests that the initial interaction of the incident proton is with a bound nucleon and that one or both of these nucleons is emitted or initiates a cascade leading to more complex states.