Signature Splitting and Inversion and Back Bending in Negative Sideband in 80Rb

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HE Chuang-Ye, WEN Shu-Xian, ZHU Li-Hua, WANG Zhi-Min, LI Guang-Sheng, MA Rui-Gang, WU Xiao-Guang, YUAN Guan-Jun, YANG Chun-Xiang, WANG Yue, ZHANG Zhen-Long, MENG Rui, Signature Splitting and Inversion and Back Bending in Negative Sideband in 80Rb[J]. Chinese Physics C, 2003, 27(9): 784-788.
HE Chuang-Ye, WEN Shu-Xian, ZHU Li-Hua, WANG Zhi-Min, LI Guang-Sheng, MA Rui-Gang, WU Xiao-Guang, YUAN Guan-Jun, YANG Chun-Xiang, WANG Yue, ZHANG Zhen-Long, MENG Rui, Signature Splitting and Inversion and Back Bending in Negative Sideband in 80Rb[J]. Chinese Physics C, 2003, 27(9): 784-788. shu
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Received: 2002-11-28
Revised: 1900-01-01
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Signature Splitting and Inversion and Back Bending in Negative Sideband in 80Rb

    Corresponding author: HE Chuang-Ye,
  • China Institute of Atomic Energy, Beijing 102413,China2 Department of Physics, Jinlin University, Changchun 130023,China3 Department of Physics, Tsinghua University, Beijing 100084,China4 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan

Abstract: High spin states of 80Rb have been studied by using fusion evaporation reactions,65Cu+19F,66Zn+18O and 68Zn+16O with beam energies of 75MeV, 76MeV and 80MeV, respectively, at HI-13 Tandem accelerator Beijing and JAERI Japan. γ-γ coincidence and DCO ratios were measured by the HPGe detector systems. About twenty new γ transitions are added to the previously proposed level schema from the present experiments. The second negative band is pushed up from 12 to 22. Abackbending at frequency of 0.49MeV is observed. Evidence has also been found for two hitherto unknown sidebands built on the negative yrast band. Signature splitting in both negative bands is observed. Signature inversion occurs only in the yrast negative band at spin of 15 and it is close to that of 82Y. The plots of [E(I)-E(I-1)]/(2I) vs I are given and compared with its isotones 78Br and 82Y as well as its isotopes 76Rb and 78Rb.

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