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Magic Nature of Neutrons in
Michimasa, S; Kobayashi, M; Kiyokawa, Y; Ota, S; Ahn, D S; Baba, H; Berg, G P A; Dozono, M; Fukuda, N; Furuno, T; Ideguchi, E; Inabe, N; Kawabata, T; Kawase, S; Kisamori, K; Kobayashi, K; Kubo, T; Kubota, Y; Lee, C S; Matsushita, M; Miya, H; Mizukami, A; Nagakura, H; Nishimura, D; Oikawa, H; Sakai, H; Shimizu, Y; Stolz, A; Suzuki, H; Takaki, M; Takeda, H; Takeuchi, S; Tokieda, H; Uesaka, T; Yako, K; Yamaguchi, Y; Yanagisawa, Y; Yokoyama, R; Yoshida, K; Shimoura, S.
  • Michimasa S; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Kobayashi M; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Kiyokawa Y; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Ota S; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Ahn DS; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Baba H; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Berg GPA; Department of Physics and Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA.
  • Dozono M; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Fukuda N; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Furuno T; Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan.
  • Ideguchi E; Research Center for Nuclear Physics, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
  • Inabe N; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Kawabata T; Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan.
  • Kawase S; Department of Advanced Energy Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan.
  • Kisamori K; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Kobayashi K; Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan.
  • Kubo T; Facility for Rare Isotope Beams, Michigan State University, 640 South Shaw Lane, East Lansing, Michigan 48824, USA.
  • Kubota Y; National Superconducting Cyclotron Laboratory, Michigan State University, 640 South Shaw Lane, East Lansing, Michigan 48824, USA.
  • Lee CS; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Matsushita M; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Miya H; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Mizukami A; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Nagakura H; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Nishimura D; Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan.
  • Oikawa H; Department of Physics, Rikkyo University, Toshima, Tokyo 171-8501, Japan.
  • Sakai H; Department of Physics, Tokyo City University, Tamazutsumi 1-28-1, Setagaya-ku, Tokyo 158-8557, Japan.
  • Shimizu Y; Department of Physics, Tokyo University of Science, Noda, Chiba 278-8510, Japan.
  • Stolz A; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Suzuki H; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Takaki M; National Superconducting Cyclotron Laboratory, Michigan State University, 640 South Shaw Lane, East Lansing, Michigan 48824, USA.
  • Takeda H; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Takeuchi S; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Tokieda H; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Uesaka T; Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan.
  • Yako K; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Yamaguchi Y; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Yanagisawa Y; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Yokoyama R; Center for Nuclear Study, The University of Tokyo, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Yoshida K; RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
  • Shimoura S; Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA.
Phys Rev Lett ; 121(2): 022506, 2018 Jul 13.
Article en En | MEDLINE | ID: mdl-30085708
ABSTRACT
We perform the first direct mass measurements of neutron-rich calcium isotopes beyond neutron number 34 at the RIKEN Radioactive Isotope Beam Factory by using the time-of-flight magnetic-rigidity technique. The atomic mass excesses of ^{55-57}Ca are determined for the first time to be -18650(160), -13510(250), and -7370(990) keV, respectively. We examine the emergence of neutron magicity at N=34 based on the new atomic masses. The new masses provide experimental evidence for the appearance of a sizable energy gap between the neutron 2p_{1/2} and 1f_{5/2} orbitals in ^{54}Ca, comparable to the gap between the neutron 2p_{3/2} and 2p_{1/2} orbitals in ^{52}Ca. For the ^{56}Ca nucleus, an open-shell property in neutrons is suggested.
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2018 Tipo del documento: Article
Texto completo
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XML
PubMed Links
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Texto completo: 1 Banco de datos: MEDLINE Idioma: En Año: 2018 Tipo del documento: Article