Persistence of magicity in neutron rich exotic Ni in ground as well as excited states
May 19, 201817 pages
Published in:
- Int.J.Mod.Phys.E 27 (2018) 07, 1850062
- Published: Jul 18, 2018
e-Print:
- 1805.07554 [nucl-th]
Citations per year
Abstract: (WSP)
Recent experimental observation of magicity in 78Ni has infused the interest to examine the persistence of the magic character across the N = 50 shell gap in extremely neutron-rich exotic nucleus 78Ni in ground as well as excited states. A systematic study of Ni isotopes and N = 50 isotones in ground state is performed within the microscopic framework of relativistic mean-field (RMF) theory and the triaxially deformed Nilsson–Strutinsky model (NSM). Ground state density distributions, charge form factors, radii, separation energies, pairing energies, single-particle energies and the shell corrections show strong magicity in 78Ni. Excited nuclei are treated within the statistical theory of hot rotating nuclei where the variations of level density parameter and entropy show significant magicity with a deep minima at N = 50, which persists up to the temperatures ≈1.5–2MeV and then slowly disappears with increasing temperature. Rotational states are evaluated and effect of rotation on N = 50 (Z = 20−30) isotones are studied. Our results agree very well with the available experimental data and few other theoretical calculations.Note:
- Submitted to IJMPE
- 23.50.+z
- 21.10.−k
- 21.10.Dr
- Relativistic mean-field theory
- Nilsson–Strutinsky approach
- doubly magic nucleus
- shell closure
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