Bulg. J. Phys. vol.42 no.4 (2015), pp. 382-386

High-K Isomers and the Role of β6 Deformation

P.M. Walker1, H.L. Liu2, F.R. Xu3
1Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
2Department of Applied Physics, School of Science, Xi'an Jiaotong University, Xi'an 710049, China
3State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
Abstract. High-K isomeric states and their decays give access to the excited-state structure of neutron-rich rare-earth nuclides, where a maximum in β6 deformation has been predicted. Using extensions of the Nilsson-Strutinsky approach, including configuration constraints, we have calculated single-particle energies, and two-quasiparticle excitation energies. Their sensitivity to β6 deformation is discussed, as well as the possible influence of β6 deformation on collective rotational energies.

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