Spectroscopy of Ne32 and the "island of Inversion"

P. Doornenbal, H. Scheit, N. Aoi, S. Takeuchi, K. Li, E. Takeshita, H. Wang, H. Baba, S. Deguchi, N. Fukuda, H. Geissel, R. Gernhäuser, J. Gibelin, I. Hachiuma, Y. Hara, C. Hinke, N. Inabe, K. Itahashi, S. Itoh, D. KamedaS. Kanno, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, T. Kubo, T. Kuboki, K. Kusaka, M. Lantz, S. Michimasa, T. Motobayashi, T. Nakamura, T. Nakao, K. Namihira, S. Nishimura, T. Ohnishi, M. Ohtake, N. A. Orr, H. Otsu, K. Ozeki, Y. Satou, S. Shimoura, T. Sumikama, M. Takechi, H. Takeda, K. N. Tanaka, K. Tanaka, Y. Togano, M. Winkler, Y. Yanagisawa, K. Yoneda, A. Yoshida, K. Yoshida, H. Sakurai

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91 Citations (Scopus)

Abstract

We report on the first spectroscopic study of the N=22 nucleus Ne32 at the newly completed RIKEN Radioactive Ion Beam Factory. A single γ-ray line with an energy of 722(9)keV was observed in both inelastic scattering of a 226MeV/u Ne32 beam on a carbon target and proton removal from Na33 at 245MeV/u. This transition is assigned to the deexcitation of the first Jπ=2+ state in Ne32 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.

Original languageEnglish
Article number032501
JournalPhysical review letters
Volume103
Issue number3
DOIs
Publication statusPublished - 2009 Aug 6

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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