Interplay of deformation and two neutrons transfer effects in 6He induced fusion reactions around barrier energies

We have analyzed the fusion excitation function data of various reactions involving 6He as projectile in the near barrier energy region using proximity potential and quantum diffusion approach by incorporating the effects arising by assuming two neutrons transfer before fusion. It has been found that the two neutrons transfer enhances the sub-barrier fusion for those systems wherein the change in deformation is negligibly small. But for systems in which there is a substantial change in deformation due to neutrons transfer there may occur either suppression or enhancement depending of nature of change in shape. The inclusion of these effects leads to a reasonable improvement in matching between data and predictions in sub-barrier energy region.