Configuration mixing description of the nucleus ${}^{44}$S

Abstract

We study the structure of the neutron rich ${}^{44}$S isotope with modern configuration mixing methods based on the Gogny interaction including beyond-mean-field effects. Restoration of particle number and rotational symmetries are taken into account as well as shape mixing in the whole triaxial $({\beta }_2,\gamma )$ plane. We obtain a qualitative agreement between the calculated spectrum and the experimental data reported recently. Very extended collective wave functions in the $({\beta }_2,\gamma )$ plane are found for the lowest states, corresponding to very flat potentials, indicating strong configuration mixing and supporting the weakening of the N=28 magic number.

Corrected typo (level at 3248 keV)

References in corpus (4)

• Collapse of the N=28 shell closure in ${}^{42}$Si
• Configuration mixing of angular-momentum and particle-number projected triaxial HFB states using the Skyrme energy density functional
• Angular momentum projection of cranked Hartree-Fock states: Application to terminating bands in A~44 nuclei
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Cited by in corpus (22)

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• Enhanced collectivity in neutron-deficient Sn isotopes in energy functional based collective Hamiltonian
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• Configuration interaction projected density functional theory: effects of four-quasiparticle configurations and time-odd interactions
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• Triaxial-shape dynamics in the low-lying excited $0^{+}$ state: Role of the collective mass
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• Evolution of $N=28$ shell closure in relativistic continuum Hartree-Bogoliubov theory
• Gallagher-Moszkowski splitting in deformed odd-odd nuclei within a microscopic approach
• ${}^{35,37,39}$S isotopes in $sd-pf$ space : Shell-model interpretation
• Weakening of $N=28$ shell gap and the nature of $0_2^{+}$ states