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- Title
EVOLUTION OF NUCLEAR SHAPES IN LIGHT NUCLEI FROM PROTON- TO NEUTRON-RICH SIDE.
- Authors
KUMAR, PANKAJ; THAKUR, VIRENDER; THAKUR, SMRITI; KUMAR, VIKESH; DHIMAN, SHASHI K.
- Abstract
The relativistic Hartree-Bogoliubov (RHB) model with density-dependent meson-exchange interaction and separable pairing is employed to study the shape evolution and shape coexistence in Mg (Z = 12), Si (Z = 14), S (Z = 16), and Ar (Z = 18) isotopes from proton-rich side to neutronrich side. A sudden shape transition is observed in these isotopic chains. A reasonable agreement of quadrupole deformation is found with the finite range droplet model (FRDM). Our findings of binding energies, quadrupole deformation parameter, charge radii, and isotope shifts are also in good agreement with the results of Hartree-Fock-Bogoliubov calculations based on the D1S-Gogny force. In addition to shape evolution, the disappearance of N = 28 shell closure and onset of deformation is also observed towards the neutron-rich side. The modification of N = 28 shell gap is related to the quadrupole excitations across it. The present calculations infer the neutron drip line at 40Mg.
- Subjects
NUCLEAR shapes; ISOTOPE shift; QUADRUPOLES; BINDING energy
- Publication
Acta Physica Polonica B, 2021, Vol 52, Issue 5, p401
- ISSN
0587-4254
- Publication type
Article
- DOI
10.5506/APhysPolB.52.401