2024-03-28T09:08:28Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/491172022-11-17T02:08:08Zhdl_2115_20039hdl_2115_116Five-body resonances of 8C using the complex scaling methodMyo, TakayukiKikuchi, YumaKatō, Kiyoshi429We study the resonance spectroscopy of the proton-rich nucleus C-8 in the alpha + p + p + p + p cluster model. Many-body resonances are treated on the correct boundary condition as the Gamow states using the complex scaling method. We obtain the ground state of 8C as a five-body resonance for the first time, which has dominantly the subclosed (p(3/2))(4) configuration and agrees with the recent experiment for energy and decay width. We predict the second 0(+) state with the excitation energy of 5.6 MeV, which corresponds to the 2p2h state from the ground state. We evaluate the occupation numbers of four valence-protons in the C-8 states and also the J(pi) distribution of proton-pair numbers of the two 0(+) states of C-8. The ground state involves a large amount of the 2(+) proton-pair fraction, while the excited 0(2)(+) state almost consists of two of the 0(+) proton pairs, which can be understood from the (p(3/2))(2)(p(1/2))(2) configuration. We also discuss the mirror symmetry between C-8 and He-8 with an alpha+four nucleon picture. It is found that the 0(+) states retain the mirror symmetry well for the configuration properties of two nuclei.American Physical SocietyJournal Articleapplication/pdfhttp://hdl.handle.net/2115/49117https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/49117/1/PRC85-3_034338.pdf0556-2813Physical Review C8530343382012-03enginfo:doi/10.1103/PhysRevC.85.034338©2012 American Physical Societypublisher