L-dependent heavy ion fusion potentials

The energy E and angular momentum l dependence of optical potential for fusion of 16O+208Pb system, observed by Christley et al is expressed as a function of radial kinetic energy (ε) instead of explicit E and l dependence. It is shown that the effects of different channel couplings, which result in different effective potentials, can also be parametrized as a function of ε. A correlation is obtained between the energy dependent part of this effective potential and the maximum of the spin enhancement around the Coulomb barrier and both these quantities depend on the details of the channel couplings. (author). 12 refs., 7 figs