Energy dependence of the absorptive potential for sub-Coulomb energy proton bombardment of zirconium and molybdenum isotopes

Abstract

The measured (p,p) and (p,n) excitation functions for $^{92}$,94,96Zr and $^{95}$,98,100Mo were fitted in the energy range 2${E}_{\mathrm{p}}$7 MeV using a standard optical model potential with an energy dependent proton absorptive potential. The volume integral of the proton absorptive potential shows strong A dependence at low proton energy and tends to a common value of 100 MeV ${\mathrm{fm}}^{3}$ for all isotopes studied as the proton bombarding energy is increased toward 15 MeV. This result is consistent with results from analyses at higher energies.