Identification of Collective Bands in Neutron-Rich <SUP>108</SUP>Ru Nucleus

CHE Xing-Lai; ZHU Sheng-Jiang; LI Ming-Liang; YU Yong-Nan

Chinese Physics C> 2004, Vol. 28> Issue(S1) : 56-58

Identification of Collective Bands in Neutron-Rich ¹⁰⁸Ru Nucleus

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

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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 h_11/2 neutrons. The possible configurations for the two-quasiparticle collective band were also discussed.

References

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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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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date: 2004-12-30
Accepted Date: 1900-01-01
Available Online: 2004-04-02

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 h_11/2 neutrons. The possible configurations for the two-quasiparticle collective band were also discussed.