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Chinese Physics C> 1996, Vol. 20> Issue(5) : 385-393 

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

  •  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

  • 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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    [1] A.Bohr.B.R.Mottelson,Noclear Strocture（Benjamin,New York,1975）,Vol.2.[2]J.Pederson et al.,Phys.Rev.Lett,V39（1977）990.[3]R.Broda et al.,Z.Phys,A285（1978）423.[4]R.Brag et al.,Z.Phys.,A305（1982）281.[5]O.Bakander et al.,Nud.Phys.,A389（1982）93.[6]O.Hausser et al.,Phys.Rev.Lett.,V42（1979）1451.[7]O.Hausser et al.,Phys.Red Lett.,V44（1980）132.[8]Y.HZhang et al.,IMP Annual Report（1992）83.[9]Y.HZhang et al.,UTFAC Annual Report-59（1992）41.[10]T.Murakami et al.,Z.Phys.,A345（1993）123.[11]Y.Gono et al.,Nud.Phys.,A557（1993）c341.[12]M.R.Macphail,R.G.Summers-Gill,Nucl.Phys.,A237（1975）285.[13]Y.Nagai et al.,Mid.Phys.,A282（1997）29.[14]T.Glasmacher et al.,Phys.Rev,C47（1993）2586.[15]M.R.Macphail,R.G.Summers-Gill,Nucl.Phys.,A263（1976）12.[16]I.Talmi,Rev.Mod.Phys.,34（1962）704.[17]T.Dossing et al.,Phys.Sci,24（1981）258.[18]A.Odahara et al.,Z.Phys.,A350（1994）185.

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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
  • Received Date: 1900-01-01
  • Accepted Date: 1900-01-01
  • Available Online: 1996-05-05

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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