Cluster decay dynamics of actinides yielding non-Pb-daughter within relativistic mean field formalism
The cluster dynamics of radioactive nuclei decaying to neighbouring daughter nuclei of the double magic Sn and Pb is investigated using the relativistic mean-field (RMF) approach with NL3 parameter set within the preformed cluster-decay model (PCM). The novel feature of the present study is the appl...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
Springer
2024
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/45246/ https://doi.org/10.1140/epja/s10050-024-01324-4 |
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| Summary: | The cluster dynamics of radioactive nuclei decaying to neighbouring daughter nuclei of the double magic Sn and Pb is investigated using the relativistic mean-field (RMF) approach with NL3 parameter set within the preformed cluster-decay model (PCM). The novel feature of the present study is the application of the newly derived preformation formula, laying the groundwork for accessing the break-up of the Q-value: preformation energy, cluster emission energy and the recoil energy of the daughters formed. The energy associated with cluster preformation is theoretically quantified for the first time. This treatment underscores the shell effect, pairing correlation, and blocking of particular orbitals by unpaired nucleons. To ascertain the applicability of the new formula, PCM-based calculations are carried out with nuclear potential obtained using the phenomenological M3Y and microscopic RMF-based R3Y nucleon-nucleon (NN) potentials along with the corresponding densities. We observed a slight discrepancy attributable to differences in their barrier properties. Nonetheless, predictions using both M3Y and R3Y potentials align well with experimental half-lives. While none of the reaction systems resulted in a double magic daughter nucleus, we observed that the kinematics of cluster emissions are influenced by their proximity to shell closures. Analyzing the systematic recoil energy in cluster decays offers valuable insights for synthesizing elements in superheavy mass regions in the future. |
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