Published in
American Physical Society, Physical Review Letters, 3(103), 2009
DOI: 10.1103/physrevlett.103.032501
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- ORCID
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- [arxiv.org] | PDF
- [arxiv.org] | PDF
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Spectroscopy ofNe32and the “Island of Inversion”
,
S. Deguchi,
N. Fukuda,
H. Geissel,
R. Gernhäuser,
J. Gibelin,
I. Hachiuma,
Y. Hara
and other authors.
Full text: Download
Abstract
We report on the first spectroscopic study of the N=22 nucleus 32Ne at the newly completed RIKEN Radioactive Ion Beam Factory. A single gamma-ray line with an energy of 722(9) keV was observed in both inelastic scattering of a 226 MeV/u 32Ne beam on a carbon target and proton removal from 33Na at 245 MeV/u. This transition is assigned to the deexcitation of the first Jpi=2+ state in 32Ne to the 0+ ground state. Interpreted through comparison with state-of-the-art shell-model calculations, the low excitation energy demonstrates that the “island of inversion” extends to at least N=22 for the Ne isotopes.