Existence of an exotic torus configuration in high-spin excited states of 40Ca.
We investigate the possibility of the existence of the exotic torus configuration in the high-spin excited states of (40)Ca. 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 ħ and an excitation energy of about 170 MeV in all calculations using various Skyrme interactions. The total angular momentum J=60 ħ consists of aligned 12 nucleons with the orbital angular momenta Λ=+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 (40)Ca.
Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan.
T
T
Ichikawa
J A
JA
Maruhn
N
N
Itagaki
K
K
Matsuyanagi
P-G
PG
Reinhard
S
S
Ohkubo