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

Abstract

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 Ec.m.=29.6MeV and Ec.m.=37.1MeV. From the parameter sets extracted using a χ2 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. © 2020, Società Italiana di Fisica (SIF) and Springer-Verlag GmbH Germany, part of Springer Nature.