Quasielastic nucleon transfer and the heavy-ion interaction potential.

Quasielastic nucleon-transfer cross sections have been mea- sured at energies roughly-equal35% above the Coulomb barrier for /sup 58,64/Ni + /sup 112,116,120,124/Sn. The systematic trends were studied over the range of systems, which span a factor of 2 in neutron excess N-Z. The observed magnitude of the cross sections and their surface localization suggest that quasielastic processes play an important role in the average nucleus-nucleus potential, a quantity of considerable recent interest in near-barrier collisions of heavy systems.