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

Abstract

Evaporation residue (ER) cross sections for ⁷⁶Ge+¹⁵⁰Nd and ⁸²Se+^natCe were measured near the Coulomb barrier in order to investigate the effects of nuclear deformation on fusion process. The former reaction represents fusion involving the prolately deformed target ^l50Nd, whereas the latter reaction is the fusion using spherical target ^natCe. We obtained fusion probability from the experimental data with the aid of calculated survival probability. The system ⁸²Se+^natCe showed fusion hindrance in the form of 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 of the collision of ⁷⁶Ge on the side of ¹⁵⁰Nd. Since the side collision is compact in configuration at touching, our results indicates that the reaction starting from the compact touching point results in higher fusion probability.

Keywords:

• fusion probability
• ⁷⁶Ge+¹⁵⁰Nd
• ⁸²Se+^natCe
• statistical model
• extra-extra-push energy