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Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials

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 distr...

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Main Authors: Jain, N., Bhuyan, M., Mohr, P., Kumar, Raj
Format: Article
Published: American Physical Society 2024
Subjects:
Q Science (General)
QC Physics
Online Access:http://eprints.um.edu.my/46877/
https://doi.org/10.1103/PhysRevC.109.064619
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spelling my.um.eprints.468772025-01-16T02:46:03Z http://eprints.um.edu.my/46877/ Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials Jain, N. Bhuyan, M. Mohr, P. Kumar, Raj Q Science (General) QC Physics 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. American Physical Society 2024-06 Article PeerReviewed 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 <https://doi.org/10.1103/PhysRevC.109.064619>. https://doi.org/10.1103/PhysRevC.109.064619 10.1103/PhysRevC.109.064619
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Jain, N.
Bhuyan, M.
Mohr, P.
Kumar, Raj
Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
description 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.
format Article
author Jain, N.
Bhuyan, M.
Mohr, P.
Kumar, Raj
author_facet Jain, N.
Bhuyan, M.
Mohr, P.
Kumar, Raj
author_sort Jain, N.
title Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
title_short Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
title_full Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
title_fullStr Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
title_full_unstemmed Exploring the effect of positive Q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
title_sort exploring the effect of positive q-value neutron transfer in coupled-channels calculations using microscopic nuclear potentials
publisher American Physical Society
publishDate 2024
url http://eprints.um.edu.my/46877/
https://doi.org/10.1103/PhysRevC.109.064619
_version_ 1825160602246447104
score 13.244413

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