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Mass, Spectroscopy, and Two-Neutron Decay of
Monteagudo, B; Marqués, F M; Gibelin, J; Orr, N A; Corsi, A; Kubota, Y; Casal, J; Gómez-Camacho, J; Authelet, G; Baba, H; Caesar, C; Calvet, D; Delbart, A; Dozono, M; Feng, J; Flavigny, F; Gheller, J-M; Giganon, A; Gillibert, A; Hasegawa, K; Isobe, T; Kanaya, Y; Kawakami, S; Kim, D; Kiyokawa, Y; Kobayashi, M; Kobayashi, N; Kobayashi, T; Kondo, Y; Korkulu, Z; Koyama, S; Lapoux, V; Maeda, Y; Motobayashi, T; Miyazaki, T; Nakamura, T; Nakatsuka, N; Nishio, Y; Obertelli, A; Ohkura, A; Ota, S; Otsu, H; Ozaki, T; Panin, V; Paschalis, S; Pollacco, E C; Reichert, S; Rousse, J-Y; Saito, A T; Sakaguchi, S.
Affiliation
  • Monteagudo B; LPC Caen, ENSICAEN, CNRS/IN2P3, Université de Caen, Normandie Université, 14050 Caen, France.
  • Marqués FM; FRIB, Michigan State University, East Lansing, Michigan 48824, USA.
  • Gibelin J; LPC Caen, ENSICAEN, CNRS/IN2P3, Université de Caen, Normandie Université, 14050 Caen, France.
  • Orr NA; LPC Caen, ENSICAEN, CNRS/IN2P3, Université de Caen, Normandie Université, 14050 Caen, France.
  • Corsi A; LPC Caen, ENSICAEN, CNRS/IN2P3, Université de Caen, Normandie Université, 14050 Caen, France.
  • Kubota Y; Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Casal J; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Gómez-Camacho J; Center for Nuclear Study, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Authelet G; Department of Physics, Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Baba H; Dipartimento di Fisica e Astronomia "G. Galilei" and INFN-Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy.
  • Caesar C; Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain.
  • Calvet D; Departamento de Física Atómica, Molecular y Nuclear, Facultad de Física, Universidad de Sevilla, Apartado 1065, E-41080 Sevilla, Spain.
  • Delbart A; Département des Accélérateurs, de Cryogénie et de Magnétisme, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Dozono M; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Feng J; Department of Physics, Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Flavigny F; Département d'électronique des Détecteurs et d'Informatique pour la Physique, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Gheller JM; Département d'électronique des Détecteurs et d'Informatique pour la Physique, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Giganon A; Center for Nuclear Study, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Gillibert A; School of Physics, Peking University, Beijing 100871, China.
  • Hasegawa K; Institut de Physique Nucléaire, IN2P3-CNRS, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
  • Isobe T; Département des Accélérateurs, de Cryogénie et de Magnétisme, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Kanaya Y; Département d'électronique des Détecteurs et d'Informatique pour la Physique, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Kawakami S; Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Kim D; Department of Physics, Tohoku University, Miyagi 980-8578, Japan.
  • Kiyokawa Y; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Kobayashi M; Department of Applied Physics, University of Miyazaki, Gakuen-Kibanadai-Nishi 1-1, Miyazaki 889-2192, Japan.
  • Kobayashi N; Department of Applied Physics, University of Miyazaki, Gakuen-Kibanadai-Nishi 1-1, Miyazaki 889-2192, Japan.
  • Kobayashi T; Department of Physics, Ewha Womans University, Republic of Korea.
  • Kondo Y; Center for Nuclear Study, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Korkulu Z; Center for Nuclear Study, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Koyama S; Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
  • Lapoux V; Department of Physics, Tohoku University, Miyagi 980-8578, Japan.
  • Maeda Y; Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
  • Motobayashi T; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Miyazaki T; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Nakamura T; Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Nakatsuka N; Department of Applied Physics, University of Miyazaki, Gakuen-Kibanadai-Nishi 1-1, Miyazaki 889-2192, Japan.
  • Nishio Y; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Obertelli A; Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Ohkura A; Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
  • Ota S; Department of Physics, Kyoto University, Kyoto 606-8502, Japan.
  • Otsu H; Department of Physics, Kyushu University, Nishi, Fukuoka 819-0367, Japan.
  • Ozaki T; Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Panin V; Department of Physics, Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
  • Paschalis S; Department of Physics, Kyushu University, Nishi, Fukuoka 819-0367, Japan.
  • Pollacco EC; Center for Nuclear Study, University of Tokyo, Hongo 7-3-1, Bunkyo, Tokyo 113-0033, Japan.
  • Reichert S; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
  • Rousse JY; Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo 152-8551, Japan.
  • Saito AT; Département de Physique Nucléaire, IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
  • Sakaguchi S; RIKEN Nishina Center, Hirosawa 2-1, Wako, Saitama 351-0198, Japan.
Phys Rev Lett ; 132(8): 082501, 2024 Feb 23.
Article in En | MEDLINE | ID: mdl-38457706
ABSTRACT
The structure and decay of the most neutron-rich beryllium isotope, ^{16}Be, has been investigated following proton knockout from a high-energy ^{17}B beam. Two relatively narrow resonances were observed for the first time, with energies of 0.84(3) and 2.15(5) MeV above the two-neutron decay threshold and widths of 0.32(8) and 0.95(15) MeV, respectively. These were assigned to be the ground (J^{π}=0^{+}) and first excited (2^{+}) state, with E_{x}=1.31(6) MeV. The mass excess of ^{16}Be was thus deduced to be 56.93(13) MeV, some 0.5 MeV more bound than the only previous measurement. Both states were observed to decay by direct two-neutron emission. Calculations incorporating the evolution of the wave function during the decay as a genuine three-body process reproduced the principal characteristics of the neutron-neutron energy spectra for both levels, indicating that the ground state exhibits a strong spatially compact dineutron component, while the 2^{+} level presents a far more diffuse neutron-neutron distribution.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article Affiliation country: Francia Country of publication: Estados Unidos
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2024 Document type: Article Affiliation country: Francia Country of publication: Estados Unidos