Ultrahigh Spin Structures in Er-157,Er-158,Er-159

作者：Ma Hai Liang^*; Dong Bao Guo; Yan Yu Liang

来源：Chinese Physics Letters, 2008, 25(11): 3928-3931.

Rotational structures at ultrahigh spin in Er-157,Er-158,Er-159 have been investigated with the configuration-dependent cranked Nilsson-Strutinsky approach. Configurations of observed bands are assigned and the corresponding deformations are given theoretically. The calculations suggest that one of ultrahigh spin bands in Er-158 is triaxial highly deformed and the other is normal-deformed, while both ultrahigh spin bands in Er-157 are suggested to be triaxial highly deformed. The possible ultrahigh spin bands in Er-159 are predicted to be triaxial highly deformed and have shape coexistence in the same configuration. The configurations with two neutron holes in the N-osc = 4 orbitals and two neutron holes in the h(11/2) orbitals in Er-159 are favoured for ultrahigh spin states but unfavoured for band termination, which is similar to ultrahigh spin bands in Er-157,Er-158.

• 出版日期2008-11
• 单位中国原子能科学研究院