Energy dissipation in heavy systems

The interaction of medium mass projectiles (A = 28-64) with 208Pb has been studied using a split-pole spectrograph which allows single mass and charge identification. The reaction process in all systems studied so far is dominated by quasi-elastic neutron transfer reactions, especially at incident energies in the vicinity of the Coulomb barrier. In addition to the quasielastic component deep inelastic contributions are present in all reaction channels. The good mass and charge separation allows to generate Wilczynski plots for individual channels; for the system 48Ti + 208Pb we observe that the transition between the quasi-elastic and deep-inelastic reactions occurs around Q = -(30-35) MeV. (author)