Implications of occupancy of 2s1/2 state in sd-shell within RMF+BCS approach
Nov 21, 201716 pages
Published in:
- Int.J.Mod.Phys.E 26 (2017) 11, 1750072
- Published: Nov 21, 2017
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Abstract: (WSP)
We employ the relativistic mean-field plus BCS (RMF+BCS) approach to study the behavior of sd-shell by investigating in detail the single particle energies, and proton and neutron density profiles along with the deformations and radii of even–even nuclei. Emergence of new shell closure, weakly bound structure and most recent phenomenon of bubble structure are reported in the sd-shell. 22C, 24O and 26S are found to have a weakly bound structure due to particle occupancy in 2s1/2 state. On the other hand 22O, 34Ca and 34,48Si are found with depleted central density due to the unoccupied 2s1/2 state and hence they are the potential candidates of bubble structure. 22C and 24O emerge as doubly magic with N = 16 in accord with the recent experiments and 26S emerges as a new proton magic nucleus with Z = 16. N = 14 and Z = 14 are predicted as magic numbers in doubly magic 22O, 34Ca and 34,48Si, respectively. These results are found in agreement with the recent experiments and have consistent with the other parameters of RMF and other theories.- 23.50.+z
- 21.10.−k
- 21.10.Dr
- Neutron and proton magic nuclei
- relativistic mean-field plus BCS approach
- sd-shell nuclei
- doubly magic nuclei
- shell closure
- bubble structure
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