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 ^11Be + ^197Au 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 ^11Be+^197Au system simultaneously. Finally, we discuss the necessity of the LRN potential around the Coulomb barrier from a detailed analysis of the experimental data.