Effect of deformation and orientation on spin orbit density dependent nuclear potential

School of Physics and Materials Science, Thapar University, Patiala, Punjab, India

^* e-mail: rajni.mittal1989@gmail.com

Published online: 22 November 2017

Abstract

Role of deformation and orientation is investigated on spin-orbit density dependent part VJ of nuclear potential (V_N=V_P+V_J) obtained within semi-classical Thomas Fermi approach of Skyrme energy density formalism. Calculations are performed for ^24-54Si+³⁰Si reactions, with spherical target ³⁰Si and projectiles ^24-54Si having prolate and oblate shapes. The quadrupole deformation β₂ is varying within range of 0.023 ≤ β₂ ≤0.531 for prolate and -0.242 ≤ β₂ ≤ -0.592 for oblate projectiles. The spin-orbit dependent potential gets influenced significantly with inclusion of deformation and orientation effect. The spin-orbit barrier and position gets significantly influenced by both the sign and magnitude of β₂-deformation. Si-nuclei with β₂2<0 have higher spin-orbit barrier (compact spin-orbit configuration) in comparison to systems with β₂>0. The possible role of spin-orbit potential on barrier characteristics such as barrier height, barrier curvature and on the fusion pocket is also probed. In reference to prolate and oblate systems, the angular dependence of spin-orbit potential is further studied on fusion cross-sections.