Evidence for the extinction of the N = 20 neutron-shell closure for 32Mg from 
direct mass measurements

Chaudhuri, A.; Andreoiu, C.; Brunner, T.; Chowdhury, U.; Ettenauer, S.; Gallant, A.T.; Gwinner, G.; Kwiatkowski, A.A.; Lennarz, A.; Lunney, D.; Macdonald, T.D.; Schultz, B.E.; Simon, M.C.; Simon, Vanessa V.; Dilling, J.

doi:10.1103/PhysRevC.88.054317

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Evidence for the extinction of the N = 20 neutron-shell closure for ³²Mg from direct mass measurements

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Simon, Vanessa V.
TRIUMF, 4004 Wesbrook Mall, Vancouver;
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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http://link.aps.org/doi/10.1103/PhysRevC.88.054317
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Citation

Chaudhuri, A., Andreoiu, C., Brunner, T., Chowdhury, U., Ettenauer, S., Gallant, A., et al. (2013). Evidence for the extinction of the N = 20 neutron-shell closure for ³²Mg from direct mass measurements. Physical Review C, 88(5): 054317, pp. 1-5. doi:10.1103/PhysRevC.88.054317.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0014-B0C0-5

Abstract

The “island of inversion” around ³²Mg is one of the most important paradigms for studying the disappearance of the stabilizing “magicity” of a shell closure. We present the first Penning-trap mass measurements of the exotic nuclides ²⁹⁻³¹Na and ³⁰⁻³⁴Mg, which allow precise determination of the empirical shell gap for ³²Mg. The new value of 1.10(3) MeV is the smallest observed shell gap for any nuclide with a canonical magic number.