Extended optical model analyses of 11Be+197Au with dynamic polarization potentials

We discuss angular distributions of elastic, inelastic, and break-up cross-sections for the 11 Be + 197 Au system, measured at energies below and around the Coulomb barrier. To this end, we employ Coulomb dipole excitations and a long-range nuclear (LRN) potential in order to account for long-range effects of the halo nuclear system and break-up effects of the weakly bound structure. We then analyze recent experimental data, comprising three channels, viz., elastic, inelastic, and break-up cross-sections, at E c.m. = 29.6 MeV and E c.m. = 37.1 MeV . From the parameter sets extracted using a χ 2 analysis, we successfully reproduce the experimental angular distributions of the elastic, inelastic, and break-up cross-sections for the 11 Be+ 197 Au system simultaneously. Finally, we discuss the necessity of the LRN potential around the Coulomb barrier from a detailed analysis of the experimental data.