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Two-Neutron Halo is Unveiled in
Bagchi, S; Kanungo, R; Tanaka, Y K; Geissel, H; Doornenbal, P; Horiuchi, W; Hagen, G; Suzuki, T; Tsunoda, N; Ahn, D S; Baba, H; Behr, K; Browne, F; Chen, S; Cortés, M L; Estradé, A; Fukuda, N; Holl, M; Itahashi, K; Iwasa, N; Jansen, G R; Jiang, W G; Kaur, S; Macchiavelli, A O; Matsumoto, S Y; Momiyama, S; Murray, I; Nakamura, T; Novario, S J; Ong, H J; Otsuka, T; Papenbrock, T; Paschalis, S; Prochazka, A; Scheidenberger, C; Schrock, P; Shimizu, Y; Steppenbeck, D; Sakurai, H; Suzuki, D; Suzuki, H; Takechi, M; Takeda, H; Takeuchi, S; Taniuchi, R; Wimmer, K; Yoshida, K.
Afiliação
  • Bagchi S; Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
  • Kanungo R; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.
  • Tanaka YK; Justus-Liebig University, 35392 Giessen, Germany.
  • Geissel H; Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
  • Doornenbal P; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
  • Horiuchi W; Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
  • Hagen G; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.
  • Suzuki T; Justus-Liebig University, 35392 Giessen, Germany.
  • Tsunoda N; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.
  • Ahn DS; Justus-Liebig University, 35392 Giessen, Germany.
  • Baba H; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Behr K; Department of Physics, Hokkaido University, Sapporo 060-0810, Japan.
  • Browne F; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Chen S; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
  • Cortés ML; Department of Physics, Nihon University, Setagaya-ku, Tokyo 156-8550, Japan.
  • Estradé A; Center for Nuclear Study, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
  • Fukuda N; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Holl M; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Itahashi K; GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany.
  • Iwasa N; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Jansen GR; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Jiang WG; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Kaur S; Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859, USA.
  • Macchiavelli AO; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Matsumoto SY; Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
  • Momiyama S; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.
  • Murray I; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Nakamura T; Department of Physics, Tohoku University, Miyagi 980-8577, Japan.
  • Novario SJ; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Ong HJ; National Center for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Otsuka T; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Papenbrock T; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
  • Paschalis S; Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada.
  • Prochazka A; Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
  • Scheidenberger C; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Schrock P; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Shimizu Y; Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
  • Steppenbeck D; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Sakurai H; Institut de Physique Nucleaire, IN2P3, CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
  • Suzuki D; Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
  • Suzuki H; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Takechi M; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
  • Takeda H; RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan.
  • Takeuchi S; RIKEN Nishina Center, Wako, Saitama 351-0198, Japan.
  • Taniuchi R; Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan.
  • Wimmer K; Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Yoshida K; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
Phys Rev Lett ; 124(22): 222504, 2020 Jun 05.
Article em En | MEDLINE | ID: mdl-32567915
ABSTRACT
We report the measurement of reaction cross sections (σ_{R}^{ex}) of ^{27,29}F with a carbon target at RIKEN. The unexpectedly large σ_{R}^{ex} and derived matter radius identify ^{29}F as the heaviest two-neutron Borromean halo to date. The halo is attributed to neutrons occupying the 2p_{3/2} orbital, thereby vanishing the shell closure associated with the neutron number N=20. The results are explained by state-of-the-art shell model calculations. Coupled-cluster computations based on effective field theories of the strong nuclear force describe the matter radius of ^{27}F but are challenged for ^{29}F.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2020 Tipo de documento: Article