BEHAVIOUR OF NUCLEAR BASS AND WINTHER POTENTIALS TOWARDS THE FUSION SUB-BARRIER CROSS SECTION OF 16O + 58,62Ni

Abstract

Six different versions of nuclear Bass and Winther potentials viz., Bass 77, Bass 80, Ngô 80, CW 76, BW 91 and AW 95, are being applied to see the influence of static quadrupole and hexadecapole deformation of targets and its orientations with collision axis on the fusion cross section. The interaction barrier parameters (barrier height, position and its curvature) for the reactions induced by spherical projectiles, ¹⁶O, on the slightly deformed targets, ^58,62Ni, have been estimated from the variations of total interaction potential with the inter-nuclear separation; which is then used in Wong’s formula to determine the fusion cross section for the reactions. It is found that the nuclear potential considered here strongly depends on the value of the deformation parameters of the target and its orientation. In this work, the experimental fusion cross-section of the reactions ¹⁶O + ⁵⁸Ni and ¹⁶O + ⁶²Ni are investigated with these nuclear potentials. The fusion cross-sections obtained by Bass 80, Ngô 80, BW 91 and CW 76 potentials are found to be in better agreement with the experimental fusion cross-section than that of AW 95 and Bass 77 for the reaction ¹⁶O + ⁵⁸Ni. On the other hand, for the reaction ¹⁶O + ⁶²Ni, Bass 77, Bass 80 and BW 91 potentials are found out to be in better agreement than AW 95, CW 76 and Ngô 80 in comparison to experimental data.