Spectroscopy of 32Ne and the "Island of Inversion".
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.
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RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
Scheit
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Aoi
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Takeuchi
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Li
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Takeshita
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Wang
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Baba
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Deguchi
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Fukuda
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Geissel
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Gernhäuser
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Gibelin
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Hachiuma
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Hara
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Hinke
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Inabe
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Itahashi
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Itoh
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Kameda
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Kanno
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Kawada
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Kobayashi
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Kondo
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Krücken
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Kubo
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Kuboki
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Kusaka
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Lantz
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Michimasa
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Motobayashi
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Nakamura
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Nakao
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Namihira
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Nishimura
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Ohnishi
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Ohtake
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Orr
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Otsu
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Ozeki
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Satou
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Shimoura
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Sumikama
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Takechi
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Takeda
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Tanaka
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Tanaka
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Togano
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Winkler
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Yanagisawa
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Yoneda
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Yoshida
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Yoshida
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Sakurai
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