Measurement of Li+Sn fusion excitation functions around the Coulomb barrier using an improved activation technique

Abstract. Fusion excitation functions have been measured for the 6Li+120Sn and 7Li+119Sn systems at energies around the Coulomb barrier, to investigate the effects of neutron transfer and breakup on the fusion process. At energies above the barrier, a sup-pression of the complete fusion excitation function with respect to the prediction of the 1D- Barrier Penetration Model has been observed, in both cases. At energies below the Coulomb barrier, no significant difference between the two excitation function, imputable to the different neutron transfer Q-values of the two systems has been observed.