Abstract
Angular distributions of elastic scattering of 58Ni by 64Ni and inelastic scattering leading to the first 2 + state in 58Ni or in 64Ni have been measured at E lab=203.8 and 219.2 MeV. The data have been 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.
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