Jain, N. and Bhuyan, M. and Mohr, P. and Kumar, Raj (2024) Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials. Physical Review C, 109 (6). 064619. ISSN 2469-9985, DOI https://doi.org/10.1103/PhysRevC.109.064619.
Full text not available from this repository.Abstract
We investigated the effect of the degree of freedom of neutron transfer on the cross section of heavy-ion fusion reactions, using the relativistic mean-field formalism within the coupled-channels approach (CCFULL). We obtain the microscopic nuclear interaction potential in terms of the density distributions for the targets and projectiles with the NL3 & lowast; parameter set and corresponding R3Y nucleon-nucleon potential. The present analysis includes the 18O-induced reactions, namely, 18O + 58,60,64Ni, 18O + 74Ge, 18O + 148Nd, 18O + 150Sm, and 18O + 182,184,186W for which experimental fusion cross sections are available around the Coulomb barrier. It is evident from the results that including vibrational and/or rotational degrees of freedom enhances the fusion cross section at energies below the barrier. However, fusion hindrance persists in this energy region. To address this, we incorporated the two-neutron (2n) transfer channels in the coupled-channels calculation. A comparison with the Woods-Saxon (WS) potential shows that the R3Y nucleon-nucleon (NN) potential, with intrinsic degrees of freedom, is superior to it, especially at energies below the barrier. This superiority can be attributed to the observed higher barrier heights and lower cross section of the WS potential compared to the relativistic R3Y NN potential for the considered reaction systems. Consequently, we employed the relativistic mean-field formalism to estimate fusion characteristics for the unknown 18O-induced reactions, namely 18O + 62Ni, 18O + 70,72,76Ge, 18O + 144,150Nd, and 18O + 144,148,152,154Sm. Our analysis highlights the significant role of positive Q-value neutron transfer in enhancing the sub-barrier fusion cross section for the 18O + 148Nd reaction with the R3Y NN potential. However, the effect of this transfer channel for the other considered reactions is comparatively less pronounced.
| Item Type: | Article |
|---|---|
| Funders: | Department of Science & Technology (India) Science Engineering Research Board (SERB), India (CRG/2021/001229); (RJF/2022/000140), National Research, Development & Innovation Office (NRDIO) - Hungary (NKFIH K134197) |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 16 Jan 2025 02:46 |
| Last Modified: | 16 Jan 2025 02:46 |
| URI: | http://eprints.um.edu.my/id/eprint/46877 |
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