Exchange nonlocal effects in the nuclear heavy-ion elastic scattering

摘要

An interesting feature of the presence of exchange nonlocal effects in the nucleus-nucleus collision description in the modification of the nuclear barrier. This results, on the one hand, in an enhancement of the nuclear fusion cross sections due to the modification introduced in the basic quantum mechanical tunnelling calculation and, on the other hand, leads one to the study of the consequences of those effects in the nuclear elastic scattering. In this paper, we discuss the manifestations of the presence of those effects through an approximated model Schroedinger equation describing a nuclear system colliding at energies around the barrier. An an application, the elastic channel and, concomitantly, the fusion processes are studied for the (sup 16) O + (sup 60) Ni system at energies close to the barrier. (author). 15 refs., 4 figs. (Atomindex citation 28:028907)