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Chinese Physics C> 2007, Vol. 31> Issue(4) : 357-360 

Study of Multi-Quasiparticle Excited States in 139Ce

  •  Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China

  • High-spin states in 139Ce have been populated using the 130Te(12C,3n) reaction at beam energy of 50MeV. The level scheme of 139Ce has been revised and extended greatly up to E=5765.0keV. The level structure of 139Ce shows typical characteristics of spherical nucleus, and the high-spin states were formed by the excitations of valence nucleons. Energies of the yrast and near yrast high-spin states in 139Ce have been calculated by the empirical shell model, and the multi-quasiparticle nature of high-spin excited states has been discussed.
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    [1] . Ludziejewski J, Arnold H. Z. Phys., 1977, A281: 2872. Chaumeaux A, Bruge G, Faraggi H. Nucl. Phys., 1971,A164: 1763. LIU M L, ZHANG Y H, ZHOU X H et al. Science in China,2003, G46: 3304. ZHENG Y, ZHOU X H, ZHANG Y H et al. Science inChina, 2004, G47: 5615. Kownacki J, Ludziejewski J, Sujkowski Z et al. Nucl. Phys.,1974, A236: 1256. Enghardt W, Kaubler L, Prade H et al. Nucl. Phys., 1986,A449: 4177. Baer H W, Reidy J J, Wiedenbeck M L. Nucl. Phys., 1966,86: 3328. China Institute of Atomic Energy. Clebsch-Gordan ecienttable. Beijing: Science Press, 1964. 3-64(in Chinese)(中国科学院原r能研究所.克累布施一郭尔丹系数表.北京:科学出版社,1964. 3-64)

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HUA Wei, ZHOU Xiao-Hong, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, XIE Cheng-Ying, SONG Li-Tao and WANG Hua-Lei. Study of Multi-Quasiparticle Excited States in 139Ce[J]. Chinese Physics C, 2007, 31(4): 357-360.
HUA Wei, ZHOU Xiao-Hong, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, XIE Cheng-Ying, SONG Li-Tao and WANG Hua-Lei. Study of Multi-Quasiparticle Excited States in 139Ce[J]. Chinese Physics C, 2007, 31(4): 357-360. shu
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Received: 2006-06-01
Revised: 2006-08-22
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Study of Multi-Quasiparticle Excited States in 139Ce

    Corresponding author: ZHOU Xiao-Hong,
  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received Date: 2006-06-01
  • Accepted Date: 2006-08-22
  • Available Online: 2007-04-05

Abstract: High-spin states in 139Ce have been populated using the 130Te(12C,3n) reaction at beam energy of 50MeV. The level scheme of 139Ce has been revised and extended greatly up to E=5765.0keV. The level structure of 139Ce shows typical characteristics of spherical nucleus, and the high-spin states were formed by the excitations of valence nucleons. Energies of the yrast and near yrast high-spin states in 139Ce have been calculated by the empirical shell model, and the multi-quasiparticle nature of high-spin excited states has been discussed.

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