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Article Dans Une Revue Physical Review Letters Année : 2009

Shell erosion and shape coexistence in 43 16S27

L. Gaudefroy
  • Fonction : Auteur
J.M. Daugas
  • Fonction : Auteur
C. Stodel
M. Girod
  • Fonction : Auteur
B. Rossé
  • Fonction : Auteur
V. Méot
Pierre Morel
  • Fonction : Auteur

Résumé

We report on the g-factor measurement of the first isomeric state in 4316S27 [Ex = 320.5(5) keV, T1/2 = 415(5) ns, and g = 0:317(4)]. The 7/2- spin-parity of the isomer and the intruder nature of the ground state of the nucleus are experimentally established for the first time, providing direct and unambiguous evidence of the collapse of the N = 28 shell closure in neutron-rich nuclei. The shell model, beyond the mean-field and semiempirical calculations, provides a very consistent description of this nucleus showing that a well deformed prolate and quasispherical states coexist at low energy.
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Dates et versions

in2p3-00365309 , version 1 (03-03-2009)

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Citer

L. Gaudefroy, J.M. Daugas, M. Hass, S. Grévy, C. Stodel, et al.. Shell erosion and shape coexistence in 43 16S27. Physical Review Letters, 2009, 102, pp.092501. ⟨10.1103/PhysRevLett.102.092501⟩. ⟨in2p3-00365309⟩
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