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Chinese Physics C> 2002, Vol. 26> Issue(2) : 104-107 

A New Level Scheme of 127I

  •  Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006, Japan

  • Study of in beam γ ray spectroscopy of 127I has been performed using 124Sn(7Li, 4n)127I reaction at 32 MeV beam energy. A new level scheme of 127I has been established including 25 new levels and 52 new γ transitions. Negative parity levels based on 11/2－ π h11/2 particle state have been observed up to (35/2－) extending our knowledge of decoupled structures to the heavier iodine isotope. Two ΔI=2 yrast positive-parity levels have been proposed to be associated mainly with the πg7/2 configuration due to observations of several strong inter band transitions. Two weakly populated ΔI=2 positive parity levels and a high-lying ΔI=1 cascade have been newly identified and tentatively assigned as πd5/2 one-quasiparticle and three quasiparticle bands, respectively.
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    [1] . Gordon D M, GAI M, Gaigalas A K et al. Phys. Lett., 1977, B67: 1612. Hagemann U, Keller H-J, Brinckmann H-F. Nucl. Phys., 1977, A289: 292 3. Shroy R E, Gordon D M, GAI M et al. Phys. Rev., 1982, C26: 10894. GAI M, Gordon D M, Shroy R E et al. Phys. Rev., 1982, C26: 11015. LIANG Y, Fossan D B, Hughes J R et al. Phys. Rev., 1992, C45: 10416. LIANG Y, Fossan D B, Hughes J R et al. In: Proceedinds of the International Conference on High Spin Physics and Gamma soft Nuclei, Salad in J X et aled. Sigapore: World Scientific Press, 1991. 308—3147. Goswami R, Sethi B, Banerjee P. Phys. Rev., 1993, C47: 10138. Sharma H, Sethi B, Goswami R et al. Phys. Rev., 1999, C59: 24469. Donau F, Hagemann U. Z. Phys., 1979, A293: 31 10. KostovaL G, Andrejtsche ffW, Kostov L K et al. Nucl. Phys., 1988, A485: 3111. ZHANG C T, Bhattacharyya P, Daly P J et al. Nucl. Phys., 1998, A628: 386

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ZHANG Yu-Hu and MA Ying-Jun. A New Level Scheme of 127I[J]. Chinese Physics C, 2002, 26(2): 104-107.
ZHANG Yu-Hu and MA Ying-Jun. A New Level Scheme of 127I[J]. Chinese Physics C, 2002, 26(2): 104-107. shu
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Received: 2001-10-22
Revised: 1900-01-01
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A New Level Scheme of 127I

    Corresponding author: ZHANG Yu-Hu,
  • Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China2 Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-0006, Japan
  • Received Date: 2001-10-22
  • Accepted Date: 1900-01-01
  • Available Online: 2002-02-05

Abstract: Study of in beam γ ray spectroscopy of 127I has been performed using 124Sn(7Li, 4n)127I reaction at 32 MeV beam energy. A new level scheme of 127I has been established including 25 new levels and 52 new γ transitions. Negative parity levels based on 11/2－ π h11/2 particle state have been observed up to (35/2－) extending our knowledge of decoupled structures to the heavier iodine isotope. Two ΔI=2 yrast positive-parity levels have been proposed to be associated mainly with the πg7/2 configuration due to observations of several strong inter band transitions. Two weakly populated ΔI=2 positive parity levels and a high-lying ΔI=1 cascade have been newly identified and tentatively assigned as πd5/2 one-quasiparticle and three quasiparticle bands, respectively.

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