COUPLED-CHANNELS ANALYSES OF SCATTERING AND FUSION CROSS-SECTIONS OF O-16+SM-152,SM-154, W-188 SYSTEMS AT SUB-COULOMB AND NEAR-COULOMB BARRIER ENERGIES

Coupled-channels calculations are performed to predict fusion, elastic scattering, and inelastic scattering cross sections for the O16+152,154Sm and O16+186W systems at sub- and near-Coulomb barrier energies, taking into account the lowest rotational states of the target up to Iπ=8+ explicitly. It is shown that experimental data of fusion cross sections taken recently with high precision, partial fusion cross sections, and also average spin values of compound nuclei formed after fusion are well reproduced by the calculations using optical potential parameters that can reproduce elastic and inelastic scattering data. The fusion-barrier distribution, defined as the second derivative of the fusion cross section d2(Eσ)/dE2, is also calculated and compared with experimental data. Particular attention is focused on effects of the Y4 deformation of the target on various physical quantities. © 1995 The American Physical Society.