Quasielastic scattering of light exotic nuclei. A semi-microscopic folding analysis

Abstract

Angular distributions and total reaction cross sections for the quasielastic scattering of (i) 8B and 7Be on 12C at E lab = 40 MeV/nucleon, (ii) 11Li on 28Si at E lab = 29 MeV/nucleon, and (iii) 11C and 11Li on 12C at lab = 60 MeV/nucleon are studied with coupled-channels calculations using double-folding optical potential based on the M3Y effective interaction and densities obtained within the energy-density functional approach with a fixed parameter set for all colliding nuclei. An imaginary part of the optical potential is constructed from folding the real one with two free parameters for volume and surface absorption. It is shown that a fairly good description of the experimental data can be achieved within a rather restricted range of these free parameters without renormalization of the real part of the optical potential. The analysis confirms the long neutron tail (halo) in 11Li and supports a rather thick proton skin in 8B and, to a lesser extent, in 7Be.