Quasielastic transfer strength near the barrier for 58Ni + Sn

In continuation of a program to study the interactions between /sup 58,64/Ni and the even Sn-isotopes, the authors have measured direct reaction channels at energies close to the barrier using the newly developed parallel plate timing detector in the split-pole magnetic spectrograph. Angular distributions for quasielastic neutron transfer reactions measured for the different Sn targets are shown. The integrated cross sections at E/sub lab/ = 247 MeV change from 15 mb for 58Ni + 112Sn to 200 mb for 58Ni + 124Sn. This dependence can be understood as a consequence of the underlying Q-values for the transfer reactions. Comparing these transfer cross sections with the fusion cross sections, the authors again observe that transfer reactions are the dominant processes for reactions induced by medium-weight projectiles at energies in the vicinity of the Coulomb barrier