Polarization potentials for the208Pb(7Li,6Li)209Pbtransfer

Abstract

Recent optical model analyses of near-barrier ${}^{7}$Li+${}^{208}$Pb elastic scattering data found a peak in the energy dependence of ${W}_{\mathrm{OM}},$ the strength of the imaginary part of the optical model potential at the strong absorption radius. It was speculated that this might be due to the polarization potentials produced by couplings to the ${}^{208}$Pb${(}^{7}$Li,${}^{6}$Li)${}^{209}$Pb transfer channels. In this Brief Report we show explicitly that such couplings do indeed produce polarization potentials with the same energy dependence as that observed for the empirical optical potentials.