Signature Inversion in the πh9/2⊙νi13/2 Oblate Band of 190Tl

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ZHOU Xiao-Hong, XIE Cheng-Ying, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, ZHENG Yong, LIU Min-Liang, SONG Li-Tao, WANG Hua-Lei, YU Hai-Ping, LUO Peng, GUO Wen-Tao, Signature Inversion in the πh9/2⊙νi13/2 Oblate Band of 190Tl[J]. Chinese Physics C, 2004, 28(10): 1045-1049.
ZHOU Xiao-Hong, XIE Cheng-Ying, ZHANG Yu-Hu, GUO Ying-Xiang, LEI Xiang-Guo, ZHENG Yong, LIU Min-Liang, SONG Li-Tao, WANG Hua-Lei, YU Hai-Ping, LUO Peng, GUO Wen-Tao, Signature Inversion in the πh9/2⊙νi13/2 Oblate Band of 190Tl[J]. Chinese Physics C, 2004, 28(10): 1045-1049. shu
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Received: 2004-04-29
Revised: 1900-01-01
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Signature Inversion in the πh9/2⊙νi13/2 Oblate Band of 190Tl

    Corresponding author: ZHOU Xiao-Hong,
  • Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 China Institute of Atomic Energy, Beijing 102413,China

Abstract: High spin states in 190Tl have been studied experimentally using the 160Gd(35Cl,5n) fusion evaporation reaction at beam energies of 167—175 MeV. A rotational band built on the πh9/2⊙νi13/2 configuration with oblate deformation has been established. Spin values have been firmly assigned to the πh9/2⊙νi13/2 oblate band by combining the present in beam experimental results with the complementary α γ correlation measurements of 194Bi α decay. With the configuration and spin parity assignments, the low spin signature inversion has been revealed for the πh9/2⊙νi13/2 oblate band. It is the first experimental observation of low spin signature inversion for a band associated with the oblate πh9/2⊙νi13/2 configuration. The low spin signature inversion could be interpreted in the framework of the quasiparticles plus rotor model including a J dependent proton neutron residual interaction.

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