Implementation of a microscopic nuclear potential in the coupled-channels calculations to study the fusion dynamics of oxygen-based reactions

• Main Authors: Jain, N., Bhuyan, Mrutunjaya, Kumar, Raj
• Format: Article
• Published: American Physical Society 2024
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/45404/; https://doi.org/10.1103/PhysRevC.109.034617
• Institution: Universiti Malaya

We incorporate a microscopic relativistic nuclear potential obtained from the recently developed relativistic R3Y NN potential in the coupled-channels code CCFULL to study fusion dynamics. The R3Y NN potential and the densities of interacting nuclei are obtained for the relativistic mean-field approach for the NL3* parameter set. Note that the R3Y NN potential can be expressed in terms of masses of the mesons and their couplings by considering the meson degrees of freedom within the relativistic mean field, which has a form similar to the widely used M3Y potential. We focused on the fusion cross sections for oxygen-based reactions with targets from different mass regions of the periodic table, i.e.,16O + 24Mg, 18O + 24Mg, 16O + 148Sm, 16O + 176Hf, 16O + 176Yb, 16O + 182W, and 16O + 186W. A comparison is also made with the cross sections calculated using the nuclear potential obtained from the traditional Woods-Saxon potential and the widely used M3Y NN potential within CCFULL. The coupled-channels calculations are performed with shape and rotational degrees of freedom to examine the fusion enhancement at below-barrier energies. It is observed from the calculations that the fusion cross sections obtained using the R3Y NN potential with rotational degrees of freedom are found to be more consistent with the experimental data than those for the M3Y and Woods-Saxon potentials, mainly at below barrier energies.