Quasielastic scattering of Be 7 +natZr at sub- and near-barrier energies

A quasielastic scattering study of the Be7+Zrnat system was performed at five sub- and near- Coulomb barrier energies, namely, 20.6, 22.1, 23.7, 27.3, and 28.2 MeV (EC.b.lab=24.3 MeV). Differential angular distributions were measured in the angular ranges ≈20° to 63° and 111° to 154° and were considered in an optical model approach, to define the energy dependence of the potential as well as to determine the total reaction cross sections. The real part of the optical potential was found to be energy independent in most of the energy range, with a weak trend of a dispersion augmentation at the lowest energy point. Total reaction cross sections were found to be compatible with phenomenological predictions, validating the choice of our potential. Fusion cross sections were also calculated, taking into account the obtained potential, and were found to compare well with experimental results of Li7 on the medium mass target of Sn124. The measured quasielastic scattering cross sections were reasonably well reproduced by continuum-discretized coupled-channel calculations. These calculations indicated a modest, but not negligible, coupling to the continuum effect.