期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 23, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.232503
关键词
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资金
- MEXT HPCI STRATEGIC PROGRAM
- MEXT of Japan
- BMBF [06ER9063, 06FY9086]
- Japan Society for the Promotion of Science (JSPS)
We investigate the possibility of the existence of the exotic torus configuration in the high-spin excited states of Ca-40. We here consider the spin alignments about the symmetry axis. To this end, we use a three-dimensional cranked Skyrme Hartree-Fock method and search for stable single-particle configurations. We find one stable state with the torus configuration at the total angular momentum J = 60 h and an excitation energy of about 170 MeV in all calculations using various Skyrme interactions. The total angular momentum J = 60 h consists of aligned 12 nucleons with the orbital angular momenta Lambda = +4, +5, and +6 for spin-up or -down neutrons and protons. The obtained results strongly suggest that a macroscopic amount of circulating current breaking the time-reversal symmetry emerges in the high-spin excited state of Ca-40.
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