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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

  • 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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    [1] . ZHU S J et al. Chin. Phys. Lett., 1998, 15: 7932.Durell J L et al. Phys. Rev., 1995, C52: R23063.YANG L M et al. Chin. Phys. Lett., 2001, 18: 244.XU R Q et al. Chin. Phys. Lett., 2002, 19: 1805.ZHANG Z et al. Phys. Rev., 2003, C67: 0643076.Hamilton J H et al. Prog. Part. Nucl. Phys., 1995, 35:6357.ZHU S et al. Rev.Mex. Fis., 1992, 38: 538.LU Q H et al. Phys. Rev., 1995, C52: 13489.Deloncle I et al. Eur. Phys. J., 2000, A8: 177-18510.JIANG Z et al. Chin. Phys. Lett., 2003, 20: 35011.ZHU S J et al. Phys. Rev., 1999, C59: 131612.ZHU S J et al. Phys. Lett., 1995, B357: 27313.Radford D C et al. Nucl. Instrum. Methods., 1995, A361:29714.Bengtsson R et al. Nucl. Phys., 1972, A237: 13915.Frauendorf S et al. Phys. Lett., 1981, B100: 21916.Frauendorf S et al. Phys. Lett., 1983, B125: 21917.Hwang J K et al. J. Phys., 1998, G24: L918.ZHU S J et al. Phys. Rev., 2001, C65: 014307

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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
  • 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 h11/2 neutrons. The possible configurations for the two-quasiparticle collective band were also discussed.

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