Halo structure of the island of inversion nucleus Ne31

T. Nakamura, N. Kobayashi, Y. Kondo, Y. Satou, N. Aoi, H. Baba, S. Deguchi, N. Fukuda, J. Gibelin, N. Inabe, M. Ishihara, D. Kameda, Y. Kawada, T. Kubo, K. Kusaka, A. Mengoni, T. Motobayashi, T. Ohnishi, M. Ohtake, N. A. OrrH. Otsu, T. Otsuka, A. Saito, H. Sakurai, S. Shimoura, T. Sumikama, H. Takeda, E. Takeshita, M. Takechi, S. Takeuchi, K. Tanaka, K. N. Tanaka, N. Tanaka, Y. Togano, Y. Utsuno, K. Yoneda, A. Yoshida, K. Yoshida

研究成果: Article査読

192 被引用数 (Scopus)


The cross sections for single-neutron removal from the very neutron-rich nucleus Ne31 on Pb and C targets have been measured at 230MeV/nucleon using the RIBF facility at RIKEN. The deduced large Coulomb breakup cross section of 540(70) mb is indicative of a soft E1 excitation. Comparison with direct-breakup model calculations suggests that the valence neutron of Ne31 occupies a low-ρ orbital (most probably 2p3/2) with a small separation energy (Sn□0.8MeV), instead of being predominantly in the 1f7/2 orbital as expected from the conventional shell ordering. These findings suggest that Ne31 is the heaviest halo system known.

ジャーナルPhysical review letters
出版ステータスPublished - 2009

ASJC Scopus subject areas

  • 物理学および天文学(全般)


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