Physics Letters B (Aug 2021)
Candidates for the 5α condensed state in 20Ne
- S. Adachi,
- Y. Fujikawa,
- T. Kawabata,
- H. Akimune,
- T. Doi,
- T. Furuno,
- T. Harada,
- K. Inaba,
- S. Ishida,
- M. Itoh,
- C. Iwamoto,
- N. Kobayashi,
- Y. Maeda,
- Y. Matsuda,
- M. Murata,
- S. Okamoto,
- A. Sakaue,
- R. Sekiya,
- A. Tamii,
- M. Tsumura
Affiliations
- S. Adachi
- Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan; Corresponding author.
- Y. Fujikawa
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- T. Kawabata
- Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan
- H. Akimune
- Department of Physics, Konan University, Higashinada, Kobe, Hyogo 658-8501, Japan
- T. Doi
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- T. Furuno
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
- T. Harada
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- K. Inaba
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- S. Ishida
- Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan
- M. Itoh
- Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan
- C. Iwamoto
- RIKEN Center for Advanced Photonics, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan
- N. Kobayashi
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
- Y. Maeda
- Faculty of Engineering, University of Miyazaki, Gaukuen-Kibanadai, Miyazaki 889-2192, Japan
- Y. Matsuda
- Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan
- M. Murata
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
- S. Okamoto
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- A. Sakaue
- Nishina Center for Accelerator Based Science, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan
- R. Sekiya
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- A. Tamii
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan
- M. Tsumura
- Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan
- Journal volume & issue
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Vol. 819
p. 136411
Abstract
We conducted the coincidence measurement of α particles inelastically scattered from 20Ne at 0° and decay charged particles in order to search for the alpha-particle condensed state. We compared the measured excitation-energy spectrum and decay branching ratio with the statistical-decay-model calculations, and found that the newly observed states at Ex=23.6, 21.8, and 21.2 MeV in 20Ne are strongly coupled to a candidate for the 4α condensed state in 16O. This result presents the first strong evidence that these states are the candidates for the 5α condensed state.
