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

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.

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Source ISSN: 2469-9985
Author 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, V. V., Dilling, J.
Maintainer CCSD
Last Updated May 7, 2026, 18:19 (UTC)
Created May 7, 2026, 18:19 (UTC)
Identifier in2p3-00920388
Language en
contributor Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM) ; Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
creator Chaudhuri, A.
date 2013-11-07T00:00:00
harvest_object_id b24cdac5-3cf1-4515-99c5-b730acb61404
harvest_source_id 3374d638-d20b-4672-ba96-a23232d55657
harvest_source_title test moissonnage SELUNE
metadata_modified 2026-04-08T00:00:00
relation info:eu-repo/semantics/altIdentifier/arxiv/1310.2344
set_spec type:ART