Phys. Rev. C 72, 044314 (2005) [9 pages]β decay of 31Mg: Extending the “island of inversion”See Also: Erratum Received 4 July 2005; published 27 October 2005 The β decay of 31Mg has been investigated at GANIL. The ions were implanted in a silicon detector array surrounded by germanium γ detectors. β particles and subsequent γ rays have been observed. The 31Mg half-life has been measured (T1/2=237±25 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 γ 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.” © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevC.72.044314
DOI:
10.1103/PhysRevC.72.044314
PACS:
27.30.+t, 23.20.Lv, 21.60.Cs
See AlsoErratum: F. Maréchal, D. L. Balabanski, D. Borremans, J.-M. Daugas, F. de Santos, P. Dessagne, G. Georgiev, J. Giovinazzo, S. Grévy, P. Himpe, C. Jollet, I. Matea, G. Neyens, F. Perrot, E. Poirier, O. Roig, M. Stanoiu, C. Stodel, J.-C. Thomas, K. Turzó, D. Yordanov, E. Caurier, F. Nowacki, and A. Poves, Erratum: β decay of 31Mg: Extending the “island of inversion” [Phys. Rev. C 72, 044314 (2005)], Phys. Rev. C 76, 059902 (2007). |
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