Dynamical aspects of 48Ti+58Fe, 58Ni → 106Cd*, 106Sn* reactions at energies near the Coulomb barrier

The study of the heavy-ion reactions at the near- and sub-barrier regimes gives immense information about the nuclear structure and the involved reaction dynamics. It has been observed that a slight difference in the nuclear structure may lead to a significant change in the sub-barrier fusion excitation functions. The studies of different trends of excitation functions below the Coulomb barrier region due to dissimilar structures of the nuclei, which are involved in the reaction, are available in literature. To understand the role of different structures and dynamics - involved in such reactions, an investigation of Ti-48-induced reactions on Fe-58 and Ni-58 forming Cd-106* and Sn-106* compound nuclei (CN), respectively, has been made at similar E-c.m./V-b values within the framework of the dynamical cluster decay model (DCM). The difference in the structure between the nuclei is quite notable with Ni-58 and Sn-106* having a proton shell closure (Z = 28 and 50, respectively). Within the DCM, the experimental fusion evaporation cross sections are reproduced using deformed configurations effects included up to quadruple deformations (beta(2i)) for two nuclei having optimum orientations theta(opt). The fusion evaporation data at near- and sub-barriers has been explained through the calculated enhanced Sigma P-0 values of the decaying channels in the case of Cd-106* in comparison to Sn-106*. Moreover, it is observed that the quantum tunneling of the fragments is less hindered in the case of Cd-106* as compared to Sn-106* at the lower values of E-c.m./V-b, i.e., having less barrier modification (Delta V-B) in the case of the former. The role of magicity has been further explored with the plotted values of the ratio of fusion cross sections (sigma(fus)) of CN Sn-106* and Xe-112* (formed in the reaction with both the projectile Ni-58 and target Fe-54 having proton and neutron magicity, respectively) with respect to Cd-106*, which are highly suppressed in the case of the latter in comparison to the former, particularly, below the Coulomb barrier.