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Chinese Physics C> 2000, Vol. 24> Issue(5) : 408-413 

Identification and Study of a High-Spin Isomer in 143Nd

  •  Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 RIKEN,Hirosawa 2—1, Wako,Saitama 351—01,Japan3 Department of Physics,Kyushu University,Hakozaki 6-10-1,Fukuoka812,Japan

  • The high spin states of 143Nd have been studied in 130Te(18O,5n) reaction at a beam energy of 80MeV. Based on delayed γ-γ coincidence,γ ray angular distribution,and γ ray linear polarization measurements,a high-spin isomer in 143Nd was identified for the first time with a measured half-life of (35±8) ns and Jπ=49/2+. The characteristic of the high-spin isomer in 143Nd was stressed with a deformed independent particle model. The model assigned a stretched configuration of [ν(f7/2h9/2i13/2)π(h2 11/2)] to the 49/2+ isomer in 143Nd As the isomers in the N=83 heavier isotones,the occurrence of the 49/2+ isomer in 143Nd can be interpreted to be caused by the sudden change in nuclear shape along the yrast line.
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    [1] Andre S et al. Z. Phys. ,1990, A337:349[2] Mcneill J et al. Z. Phys.,1986,A325:27[3] Pedetsen J et al. Phys. Rev. Lett. ,1977,39:990[4] Hr}t}nan D C J M et al. Phys. Lett. ,1979,B84;301[5] Borggreen J et al. Z. Phys. ,1980,A294;113[6] Ferragut A et al. J. Phys. Soc. Jpn. ,1993,62:3343[7] Murakami T et al. Z. Phys. ,1993,A350:123[8] Ideguchi E et al. Z. Phys.,1995,A352:363[9] Odahara A et al. Nucl. Phys,1997,A620:363[10] bussing T et al. Phys. Scr. ,1981, 24: 258[11] Hatuser O et al. Nucl. Phys. ,1982, A379:287[12] Dafni E et al. Nucl. Phys. ,1985, A443;135[13] Tekyi-Mertsah O J et al. Phys. Rev. ,1994,050:R1759[14] Aziz S M et al. Phys. Rev. ,1990,041:1268[15] Caussyn D D et al. Phys. Rev. ,1991, 043: 2098[16] Fauerhach M et al. Phys. Rev.,1998, C58;826

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ZHOU XiaoHong. Identification and Study of a High-Spin Isomer in 143Nd[J]. Chinese Physics C, 2000, 24(5): 408-413.
ZHOU XiaoHong. Identification and Study of a High-Spin Isomer in 143Nd[J]. Chinese Physics C, 2000, 24(5): 408-413. shu
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Received: 1999-04-16
Revised: 1900-01-01
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Identification and Study of a High-Spin Isomer in 143Nd

    Corresponding author: ZHOU XiaoHong,
  • Institute of Modern Physics,The Chinese Academy of Sciences,Lanzhou 730000,China2 RIKEN,Hirosawa 2—1, Wako,Saitama 351—01,Japan3 Department of Physics,Kyushu University,Hakozaki 6-10-1,Fukuoka812,Japan
  • Received Date: 1999-04-16
  • Accepted Date: 1900-01-01
  • Available Online: 2000-04-05

Abstract: The high spin states of 143Nd have been studied in 130Te(18O,5n) reaction at a beam energy of 80MeV. Based on delayed γ-γ coincidence,γ ray angular distribution,and γ ray linear polarization measurements,a high-spin isomer in 143Nd was identified for the first time with a measured half-life of (35±8) ns and Jπ=49/2+. The characteristic of the high-spin isomer in 143Nd was stressed with a deformed independent particle model. The model assigned a stretched configuration of [ν(f7/2h9/2i13/2)π(h2 11/2)] to the 49/2+ isomer in 143Nd As the isomers in the N=83 heavier isotones,the occurrence of the 49/2+ isomer in 143Nd can be interpreted to be caused by the sudden change in nuclear shape along the yrast line.

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