Folding model analysis of 58Ni + 64Ni elastic and inelastic scattering at Elab=203.8 and 219.2 MeV

Angular distributions of elastic scattering of 58Ni by 64Ni and inelastic scattering leading to the first 2+ state in 58Ni or in 64Ni were measured at Elab=203.8 and 219.2 MeV. The data were analyzed in the frame of the folding model. A renormalization N of the folding potential consistently lower than unity (N∼0.65) is needed to reproduce the elastic scattering data. Coupled-channel calculations including the main inelastic channels explain partly this discrepancy. They reproduce the elastic and inelastic scattering data with a renormalization of N∼0.8 at both energies. Interference between Coulomb and nuclear excitation is shown to play an important role in the repulsive character of the polarization potential. (author) 38 refs.; 6 figs.; 1 tab