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Article Dans Une Revue Physical Review C Année : 2005

$\beta$ decay of 31Mg: Extending the "island of inversion"

D.L. Balabanski
  • Fonction : Auteur
D. Borremans
  • Fonction : Auteur
J.-M. Daugas
  • Fonction : Auteur
G. Georgiev
P. Himpe
  • Fonction : Auteur
G. Neyens
  • Fonction : Auteur
O. Roig
  • Fonction : Auteur
C. Stodel
K. Turzó
  • Fonction : Auteur
D. Yordanov
F. Nowacki
A. Poves

Résumé

The beta of 31Mg has been investigated at GANIL. The ions were implanted in a silicon detector array surrounded by germanium gamma detectors. beta particles and subsequent gamma rays have been observed. The 31Mg half-life has been measured (T_1/2=237pm25 ms) in good agreement with previously reported values. The decay scheme of 31Mg has been enriched with two new low-spin levels and seven new $\gamma$ transitions in 31Al. Most importantly, very weak feeding to the 31Al ground and lowest excited states has been established. These results are compared to new shell-model calculations in the sd-fp valence space, using an interaction that was modified in order to reproduce the recently established low-energy level scheme of 31Mg. A good agreement for all observables is found, supporting the idea that 31Al is outside and 31Mg is inside the so-called "island of inversion."
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Dates et versions

in2p3-00024999 , version 1 (04-11-2005)

Identifiants

Citer

F. Maréchal, D.L. Balabanski, D. Borremans, J.-M. Daugas, Francois de Oliveira Santos, et al.. $\beta$ decay of 31Mg: Extending the "island of inversion". Physical Review C, 2005, 72, pp.044314. ⟨10.1103/PhysRevC.72.044314⟩. ⟨in2p3-00024999⟩
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