Probing the 6,7Li nucleon densities through a new break-up process approach

In this work we present a double folding optical model analysis of new near-barrier quasi-elastic experimental data for the 6,7Li + 120Sn systems. From the analysis, it was possible to confirm the ground-state nucleon densities assumed for the weakly bound 6,7Li isotopes. The apparent discrepancies between the experimental densities and those based on Dirac–Hartree–Fock–Bogoliubov (DHB) calculations were removed. A new approach that simulates the projectile break-up and a positive polarization from couplings of 6,7Li bound states with the continuum was considered in the reaction mechanism.