Measurements of proton total reaction cross sections for 58Ni and 60Ni including nonrelativistic and relativistic data analyses.

Abstract

Using a standard beam attenuation technique, proton total reaction cross sections (${\mathrm{\ensuremath{\sigma}}}_{\mathit{R}}$) for $^{58}\mathrm{Ni}$ and $^{60}\mathrm{Ni}$ have been measured at seven incident energies from 23 to 48 MeV to an absolute accuracy of 1 to 3%. The results have been compared both with nonrelativistic optical model predictions using global parameters and a relativistic optical model using a standard mixture of potential terms. Nuclear trans- parency calculations have also been made for these nuclei using all published data below 100 MeV.