Effects of Nuclear Deformation on the Fusion Probability in the Reactions of 76Ge + 150Nd and 82Se + natCe

Abstract

Evaporation residue (ER) cross sections for the 76Ge+150Nd and 82Se+natCe reactions were measured near the Coulomb barrier in order to investigate the effects of nuclear deformation on the fusion process. The first reaction represents fusion involving the prolately deformed target 150Nd, whereas the latter reaction is the fusion with the spherical target natCe. We obtained fusion probabilities from the experimental data with the aid of calculated survival probabilities. The system 82Se+natCe showed fusion hindrance in the form of the extra-extra-push energy of 27±5 MeV, whereas the system 76Ge+150Nd does not show any hindrance at the bombarding energy corresponding to the Coulomb barrier for the collision of 76Ge on the side of 150Nd. Since the side collision is compact in configuration at touching, our results suggest that the reaction starting from the compact touching point results in a higher fusion probability.