Continuum protons fromNi58(p,p’) at incident energies between 100 and 200 MeV

The inclusive reaction ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}$(p,p’) was studied at incident energies of 100, 120, 150, 175, and 200 MeV for scattering angles between 15° and 120°. Angular distributions at various emission energies are analyzed in terms of a quasifree knockout reaction mechanism, combined with parametrized systematics which should represent multistep contributions. Reasonable agreement between the experimental data and calculated distributions is obtained, with a consistent incident-energy dependence. The proportion of the quasifree component amounts to ∼30% of the preequilibrium yield. The quasifree contribution appears to be in agreement with the first-step yield of the statistical multistep-direct emission theory.