Dynamics of [sup 6]Li+[sup 152]Sm→[sup 158]Tb∗ reaction across the Coulomb barrier

Abstract

The neutron cross-section and the complete fusion cross-section data is available for 6Li+152Sm→158Tb*→A1+A2 reaction at various lab energies ranging from ELab = 20 MeV -40 MeV, where the effects of target deformation and projectile break-up are addressed. Here in this work, we have emphasized on the deformation (and orientation) effects in the decay of 158Tb* nucleus in the framework of dynamical cluster decay model (DCM). The cross-sections obtained through DCM based calculations find nice agreement with the reported experimental data across the Coulomb barrier. The available cross-sections are fitted for spherical and β2-deformed fragmentation paths with the effects of static β2(0) and dynamic β2(T) deformations also included into it. This provides a nice description of the role of deformation in the decay of 158Tb* nucleus. Besides this, comparative analysis with equatorial (compact) and polar (non-compact) configurations is worked out. As the polar orientations start appearing at sub-barrier energies, so the effect of deformations and orientations is illustrated at lowest incident energy, ELab = 20 MeV (or equivalently at Ec.m. = 19.2 MeV).