NUCLEAR-STRUCTURE EFFECTS IN THE TOTAL CROSS-SECTIONS FOR PROTON-INDUCED REACTIONS IN THE ENERGY-RANGE 20-60 MEV FOR 40-LESS-THAN-A-LESS-THAN-124 NUCLEI

For proton-induced reactions whose cross sections were measured to wit hin 3%, available experimental data in the energy range 20 < E < 60 Me V an analyzed on the basis of the traditional optical model with globa l parameters from the CH-89 systematics, A method for estimating the t otal cross sections for proton-induced reactions in the energy range 3 0 < E < 50 MeV is proposed. It is shown that the deviations of the tot al reaction cross sections as predicted by the optical model with glob al CH-89 parameters from their measured or estimated values are correl ated with the occupation numbers of proton and neutron shells or subsh ells. The applicability range of the CH-89 parameters is found on the basis of the dispersion optical model.