Deformation-driven p-wave halos at the drip line: 31Ne.
The halo structure of 31Ne is studied using 1n-removal reactions on C and Pb targets at 230  MeV/nucleon. A combined analysis of the cross sections of these nuclear and Coulomb dominated reactions that feed directly the 30Ne ground-state reveals 31Ne to have a small neutron separation energy, 0.15(-0.10)(+0.16)  MeV, and spin-parity 3/2-. Consistency of the data with reaction and large-scale shell-model calculations identifies 31Ne as deformed and having a significant p-wave halo component, suggesting that halos are more frequent occurrences at the neutron drip line.
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
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Nakamura
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
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Kobayashi
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
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Kondo
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan and Department of Physics and Astronomy, Seoul National University, 599 Gwanak, Seoul 151-742, Republic of Korea.
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Satou
Department of Physics, University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
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Tostevin
Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan.
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Utsuno
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Aoi
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Baba
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Fukuda
LPC-ENSICAEN, IN2P3-CNRS et Université de Caen, F-14050, Caen Cedex, France.
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Gibelin
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Inabe
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Ishihara
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Kameda
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Kubo
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Motobayashi
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Ohnishi
LPC-ENSICAEN, IN2P3-CNRS et Université de Caen, F-14050, Caen Cedex, France.
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Orr
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Otsu
Center for Nuclear Study (CNS), the University of Tokyo, Hongo, Tokyo 113-0033, Japan.
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Otsuka
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Sakurai
Department of Physics, Tokyo University of Science, Chiba 278-8510, Japan.
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Sumikama
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Takeda
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Takeshita
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Takechi
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Takeuchi
Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan and RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Togano
RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
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Yoneda