Abstract
Differential cross sections have been measured for the elastic and inelastic scattering of $^{18}\mathrm{O}$ from $^{28}\mathrm{Si}$ at 352 MeV. An optical model analysis has been performed for the elastic scattering data. Considerable ambiguity was found. Potentials which are either transparent or strongly absorbing in the surface region were obtained which give equally good fits to the data. The combined elastic and inelastic data were subjected to a coupled-channels analysis and the ambiguity was found to persist, in contrast to previously reported one-nucleon transfer data whose analysis allowed us to discriminate between the two types of potential. Other characteristics of the scattering are discussed.
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