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Chinese Physics C> 2006, Vol. 30> Issue(S2) : 154-156 

High Spin Band Structure in 112Ru

  •  Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 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 112Ru nucleus has been established.The ground-state band and the one-phonon γ-vibrational band have been confirmed and extended with spin up to 16h and 15h, respectively. The other two side bands, one proposed as two-phonon γ-vibrational band and another proposed as two-quasiparticle band, have been identified for the first time. From cranked shell model calculations, 112Ru nucleus may have triaxial deformation with parameters β2～0.27, γ～－29° and the band crossing in the yrast band is due to the alignment of two h11/2 neutrons. The characteristics for the quasiparticle band and γ-vibrational bands have also been discussed.
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    [1] . Hamilton J H et al. Prog. Part. Nucl. Phys., 1995, 35: 6352. ZHU S J et al. Chin. Phys. Lett., 1998, 15: 7933. Durell J L et al. Phys. Rev., 1995, C52: R23064. YANG L M et al. Chin. Phys. Lett., 2001, 18: 245. XU R Q et al. Chin. Phys. Lett., 2002, 19: 1806. ZHANG Z et al. Phys. Rev., 2003, C67: 0643077. ZHU S J 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. CHE X L et al. Chin. Phys. Lett., 2004, 21: 190412. ZHU S J et al. Phys. Rev., 1999, 59: 131613. ZHU S J et al. Phys. Lett., 1995, B357: 27314. Radford D C et al. Nucl. Instrum. Methods, 1995, A361:29715. HUA H et al. Phys. Lett., 2003, B562: 21016. Bengtsson R et al. Nucl. Phys., 1972, A237: 13917. Frauendorf S et al. Phys. Lett., 1983, B125: 219

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CHE Xing-Lai, ZHU Sheng-Jiang, CHEN Yong-Jing, DING Huai-Bo and LI Ming-Liang. High Spin Band Structure in 112Ru[J]. Chinese Physics C, 2006, 30(S2): 154-156.
CHE Xing-Lai, ZHU Sheng-Jiang, CHEN Yong-Jing, DING Huai-Bo and LI Ming-Liang. High Spin Band Structure in 112Ru[J]. Chinese Physics C, 2006, 30(S2): 154-156. shu
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Received: 2006-10-16
Revised: 1900-01-01
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High Spin Band Structure in 112Ru

    Corresponding author: CHE Xing-Lai,
  • Department of Physics, Tsinghua University, Beijing 100084, China2 Department of Physics, Vanderbilt University, Nashville, Tennessee 37235, USA3 Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • Received Date: 2006-10-16
  • Accepted Date: 1900-01-01
  • Available Online: 2006-01-03

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 112Ru nucleus has been established.The ground-state band and the one-phonon γ-vibrational band have been confirmed and extended with spin up to 16h and 15h, respectively. The other two side bands, one proposed as two-phonon γ-vibrational band and another proposed as two-quasiparticle band, have been identified for the first time. From cranked shell model calculations, 112Ru nucleus may have triaxial deformation with parameters β2～0.27, γ～－29° and the band crossing in the yrast band is due to the alignment of two h11/2 neutrons. The characteristics for the quasiparticle band and γ-vibrational bands have also been discussed.

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