Extended optical model analyses of <mml:msup>11</mml:msup><mml:msup>Be+197</mml:msup>Au with dynamic polarization potentials

초록

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.=29.6mml:mspace width="0.333333em"mml:mspaceMeV and Ec.m.=37.1mml:mspace width="0.333333em"mml:mspaceMeV. From the parameter sets extracted using a chi 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.

키워드