Abstract
The inclusion of a short-range repulsive term in the real part of the optical potential has previously been shown to be needed to explain the 54.7 MeV 16O + 28Si large-angle scattering data. The dynamical effects arising from this repulsive core are studied here. The changes in the angular distribution for this system brought about by the presence of the core are shown to be due to an increased reflectivity in the low-angular-momentum partial waves affecting mostly the nearside component of the scattering amplitude. From this study we draw inferences about the expected behaviour of the elastic scattering cross section for heavier systems where anomalous large-angle scattering is also observed.
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