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

Identification and Study of a High-Spin Isomer in¹⁴³Nd

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

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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 J ^π=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(f _7/2h _9/2i _13/2)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.

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

Identification and Study of a High-Spin Isomer in¹⁴³Nd

ZHOU XiaoHong^,

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 of¹⁴³Nd have been studied in¹³⁰Te(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 in¹⁴³Nd was identified for the first time with a measured half-life of (35±8) ns and J^π=49/2⁺. The characteristic of the high-spin isomer in¹⁴³Nd was stressed with a deformed independent particle model. The model assigned a stretched configuration of [ν(f_7/2h_9/2i_13/2)π(h2 11/2)] to the 49/2⁺isomer in¹⁴³Nd As the isomers in the N=83 heavier isotones,the occurrence of the 49/2⁺isomer in¹⁴³Nd can be interpreted to be caused by the sudden change in nuclear shape along the yrast line.