Transfer-Reactions At High-Energy And Ambiguities In Heavy-Ion Potentials

The smaller impact parameters that contribute to transfer reactions between heavy ions at high energies make them more sensitive to different types of optical potentials than is the case at lower energies. This may allow one to distinguish between potentials that otherwise generate similar elastic scattering cross sections within the limited angular region over which typical elastic data are available. We cite as evidence results for nucleon transfers induced by18O +28Si at 352 MeV which rule out surface transparent potentials.