Analysis of fusion excitation functions of reactions 6He +209Bi and 7Li +209Bi around Coulomb barrier

Abstract

Here, we have studied the sensitivity of fusion excitation functions of reactions induced by weakly bound projectiles [Formula: see text] and [Formula: see text] on [Formula: see text] target on nuclear potential parameters and on number of partial waves. The Kemble version of WKB approximation and Hill–Wheeler formula has been used to predict the fusion transmission probability below and above the Coulomb barrier, respectively, and the optimum values for radius (r0) = 1.17 fm, diffuseness (a) = 0.5 fm and for partial waves (l) = up to 60 are proposed. The coupled channel calculations have also been performed and it is found that the matching between data and predictions have been enhanced on inclusion of coupling effects. Further, the breakup effects are also taken into account through the dynamic polarization potential (DPP) approach. It further improves matching between data and predictions.