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Communication Dans Un Congrès Année : 2018

Shell Model Far From Stability: Island of Inversion Mergers

A. Poves

Résumé

In this study we propose a common mechanism for the disappearance of shell closures far from stabilty. With the use of Large Scale Shell Model calculations (SM-CI), we predict that the region of deformation which comprises the heaviest Chromium and Iron isotopes at and beyond N=40 will merge with a new one at N=50 in an astonishing parallel to the N=20 and N=28 case in the Neon and Magnesium isotopes. We propose a valence space including the full pf-shell for the protons and the full sdg shell for the neutrons, which represents a come-back of the the harmonic oscillator shells in the very neutron rich regime. Our calculations preserve the doubly magic nature of the ground state of 78Ni, which, however, exhibits a well deformed prolate band at low excitation energy, providing a striking example of shape coexistence far from stability. This new Island of Inversion (IoI) adds to the four well documented ones at N=8, 20, 28 and 40.

Dates et versions

hal-01744053 , version 1 (27-03-2018)

Identifiants

Citer

F. Nowacki, A. Poves. Shell Model Far From Stability: Island of Inversion Mergers. 12th International Spring Seminar on Nuclear Physics, May 2017, Sant’Angelo d’Ischia, Italy. pp.012023, ⟨10.1088/1742-6596/966/1/012023⟩. ⟨hal-01744053⟩
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