Continuum protons from 58Ni(p,p') at incident energies between 100 and 200 MeV.

Abstract

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\ifmmode^\circ\else\textdegree\fi{} and 120\ifmmode^\circ\else\textdegree\fi{}. 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 \ensuremath{\sim}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.