Study of High Spin Isomer and its Decay Level Scheme of Doubly Odd 144Pm Nucleus

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DIV align and Zhang Yuhu. Study of High Spin Isomer and its Decay Level Scheme of Doubly Odd 144Pm Nucleus[J]. Chinese Physics C, 1996, 20(5): 385-393.
DIV align and Zhang Yuhu. Study of High Spin Isomer and its Decay Level Scheme of Doubly Odd 144Pm Nucleus[J]. Chinese Physics C, 1996, 20(5): 385-393. shu
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Received: 1900-01-01
Revised: 1900-01-01
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Study of High Spin Isomer and its Decay Level Scheme of Doubly Odd 144Pm Nucleus

    Corresponding author: DIV align,
  • Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 7300002 RIKEN,Wako-shi,Saitama,351-01,Japan3 Departmeat of Physics,Tokyo Institute of Technology,Oh-okayama,Megurao,Taro 152,Japan4 Japan Atomic Energy Reserch Institute,Tokaii,Ibaraki 319-11,Japan5 Chiba University,Chiba-shi,Chiba 260, Japan6 Chiba Institute of Technolop,Narashino-shi,Chiba 275,Japan7 TsuKnba University,Tsukuba-shi, Ibarki 305,Japan8 Seoul National University, Seoul 151-742,Korea

Abstract: The High spin isomer(HSI)in 144Pm was produced and separated by using the high spin isomer beam facility.Based on the measurements of γ-γ coincidence, γ-ray excitation functions and isotropies,the decay level scheme of the HSI was established for the first time including 19 new high spin levels and 29 new γ-transitions assigned to 144Pm by this work.The HSI-γ correlation measurement indicated that the halflife of the HSI is longer than 2μs.From the systematic comparisons and the deformed independent particle model calculations for the N=83 isotones,the most possible particle configuration of π(1h211/2d5/2)v(1i13/21h9/22f7/2) and the spin-parity of Jπ=27+ were assigned to this HSI corresponding to an oblate deformation with β=-0.18.

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