Candidates for the 5α condensed state in 20Ne

Physics Letters B

Y. Fujikawa¹  M. Itoh²  C. Iwamoto²  M. Murata²  T. Doi³  T. Kawabata⁴  S. Ishida⁴  A. Sakaue⁴  T. Furuno⁴  K. Inaba⁴  A. Tamii⁴  S. Adachi⁵  H. Akimune⁵  Y. Matsuda⁶  R. Sekiya⁷  N. Kobayashi⁸  Y. Maeda⁹  T. Harada⁹  S. Okamoto⁹  M. Tsumura⁹ 

[1] Corresponding author.;Cyclotron and Radioisotope Center (CYRIC), Tohoku University, Sendai, Miyagi 980-8578, Japan;Department of Physics, Konan University, Higashinada, Kobe, Hyogo 658-8501, Japan;Department of Physics, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan;Department of Physics, Osaka University, Machikaneyama, Toyonaka, Osaka 560-0043, Japan;Faculty of Engineering, University of Miyazaki, Gaukuen-Kibanadai, Miyazaki 889-2192, Japan;Nishina Center for Accelerator Based Science, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan;RIKEN Center for Advanced Photonics, RIKEN, Hirosawa, Wako, Saitama 351-0198, Japan;Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki, Osaka 567-0047, Japan;

关键词: 20Ne;    Cluster structure;    Alpha-particle condensed state;    Inelastic alpha scattering;    Alpha decay;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown