$\beta$-decay studies at the N=28 shell closure: indications for a weakening of the spin-orbit force far from stability ?

Abstract : A β-decay experiment on nuclei in the region of N=28 has been performed at the GANIL facility. New measured half-lives for the Si isotopes from N=25 to N=28 are reported and discussed in the light of the deformation occuring in this region. Comparison with QRPA calculations suggests that a weakening of the spin-orbit force occurs for the very neutron-rich Si isotopes.
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Submitted on : Friday, November 10, 2006 - 11:24:44 AM
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S. Grévy, J.C. Angélique, P. Baumann, C. Borcea, A. Buta, et al.. $\beta$-decay studies at the N=28 shell closure: indications for a weakening of the spin-orbit force far from stability ?. Sixth International Conference on Radioactive Nuclear Beams (RNB6), Sep 2003, Argonne, United States. pp.145c-149c, ⟨10.1016/j.nuclphysa.2004.09.105⟩. ⟨in2p3-00112935⟩

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