Comparative study of the radius of sensitivity of the optical model potentials forLi6+Ni58,64andO16+Ni58,64

Abstract

Radii of sensitivity were estimated for the $^{6}\mathrm{Li}+^{58,64}\mathrm{Ni}$ system at energies near the Coulomb barrier. For comparison purposes, such radii were also estimated for stable $^{16}\mathrm{O}$ scattered from the same target isotopes. The elastic scattering data were analyzed with folded real potential generated from DDM3Y nucleon-nucleon interaction and an imaginary potential of volume Woods-Saxon form. The most sensitive radii for the $^{16}\mathrm{O}+^{58,64}\mathrm{Ni}$ system are found to be energy independent and close to the strong absorption radius. For the $^{6}\mathrm{Li}$ projectile, unlike its strongly bound counterpart, the crossing radius increases with decreasing energy. However, no two crossing situation has been observed for either the $^{6}\mathrm{Li}+^{58,64}\mathrm{Ni}$ or the $^{16}\mathrm{O}+^{58,64}\mathrm{Ni}$ system at the top of the barrier.