Identification of Collective Bands in Neutron-Rich 108Ru Nucleus

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CHE Xing-Lai, ZHU Sheng-Jiang, LI Ming-Liang and YU Yong-Nan. Identification of Collective Bands in Neutron-Rich 108Ru Nucleus[J]. Chinese Physics C, 2004, 28(S1): 56-58.
CHE Xing-Lai, ZHU Sheng-Jiang, LI Ming-Liang and YU Yong-Nan. Identification of Collective Bands in Neutron-Rich 108Ru Nucleus[J]. Chinese Physics C, 2004, 28(S1): 56-58. shu
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Received: 2004-12-30
Revised: 1900-01-01
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Identification of Collective Bands in Neutron-Rich 108Ru Nucleus

    Corresponding author: CHE Xing-Lai,
  • Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Physics, Vanderbilt University, Nashville, TN 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Abstract: Through measuring high-fold prompt γ-ray coincidence events following the spontaneous fission of 252Cf with the Gammasphere detector array, new level scheme in the very neutron-rich 108Ru nucleus has been established. The ground-state band,the one-phone γ-vibrational band and a two-quasi-particle band have been confirmed and expanded. Besides, a two-phonon γ-vibrational band has been identified. From cranked shell model calculations, 108Ru nucleus may have triaxial deformation with parameters β2~0.29, γ=-22° and the band crossing in the yrast band is due to the alignment of two h11/2 neutrons. The possible configurations for the two-quasiparticle collective band were also discussed.

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