Comparison of relativistic and nonrelativistic approaches to the collective model treatment of p+40Ca inelastic scattering.

Abstract

Elastic and inelastic observables for the scattering of 500 MeV protons from $^{40}\mathrm{Ca}$ are calculated using either the first-order relativistic or nonrelativistic impulse approximation for the diagonal potentials and a collective model for the transition potentials. The calculations are done using either Dirac or Schr\"odinger coupled channel programs. The relativistic approach reproduces the inelastic observables better than the first-order nonrelativistic impulse approximation model.