Role of Barrier Modification and Inelastic Surface Excitations in Sub-Barrier Fusion of 16 32 S + 40 94 Zr Reaction

Abstract

The fusion dynamics of 16 S+40 Zr reaction at near and sub-barrier energies is investigated within the context of different theoretical approaches. The various theoretical models like one-dimensional Wong formula, l-summed ex- tended Wong formula, the energy-dependent Woods-Saxon potential model (EDWSP model), and coupled channel for- mulation have been used to address the impacts of nuclear structure degrees of freedom of the colliding pairs. The roles of different Skyrme forces along with Wong formalism are also tested in the analysis of the sub-barrier fusion dynamics of the 16 S+40 Zr reaction. The influence of the low-lying sur- face vibrational states of the collision partners is investigated within the framework of coupled channel calculations per- formed by the code CCFULL. In the present work, it has been observed that the EDWSP model introduces barrier modifica- tion effects somewhat similar to those of the coupled channel approach, as well as those of using different Skyrme forces and hence it reasonably addresses the observed fusion data of 16 S+40 Zr reaction in the close vicinity of the Coulomb barrier.