Investigation on Structural Properties of the πi13/2⊙νi13/22-qp Band in Odd-odd 184Au

ZHANG Yu-Hu; WANG Hua-Lei; LIU Min-Liang; ZHOU Xiao-Hong; GUO Wen-Tao; de Angelis; XU Fu-Rong

Chinese Physics C> 2004, Vol. 28> Issue(9) : 907-913

Investigation on Structural Properties of the πi_13/2⊙νi_13/22-qp Band in Odd-odd ¹⁸⁴Au

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Graduate School,Chinese Academy of Sciences,Beijing 100039,China3 INFN,Laboratori Nazionali di Legnaro,Legnaro,Italy4 Department of Technical Physics and MOE Key Laboratory,Peking University,Beijing 100871,China

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Abstract：
High-spin band structures in ¹⁸⁴Au have been re-investigated using the ¹⁵⁹Tb(²⁹Si,4nγ) ¹⁸⁴Au reaction and the multi-detector array of GASP.The rotational bands built on the πh_9/2⊙_{7/2- and πi_13/2⊙νi_13/2 2-quasiparticle configurations have been extended up to higher-spin states.Of most importance,linking transitions between the two bands and to the ground state have been established leading to firm spin and parity assignments for the πi_13/2⊙νi_13/2 band in ¹⁸⁴Au.This result provides a strong evidence for the prediction that the low-spin signature inversion could occur in the πi_13/2⊙νi_13/2 bands of odd-odd nuclei in the A≈180 mass region.The quasipartice alignments and the dynamical moment of inertia have been analyzed for the πi_13/2⊙νi_13/213/2 band in ^{184^{Au,the πi_13/2 and πh_9/2 bands in ¹⁸³Au,and the νi_13/2 band in ¹⁸³Pt.It is concluded that the first band-crossing observed in the πi_13/2⊙νi_13/2 band of ₁₈₄Au corresponds to a pair of h _9/2-proton alignment.This proton alignment may play important role in the πi_13/2 band of ¹⁸³Au,the νi_13/2 band of ¹⁸³Pt,as well as in the ground-state band of ¹⁸²Pt.}}}

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ZHANG Yu-Hu, WANG Hua-Lei, LIU Min-Liang, ZHOU Xiao-Hong, GUO Wen-Tao, de Angelis and XU Fu-Rong. Investigation on Structural Properties of the πi_13/2⊙νi_13/22-qp Band in Odd-odd ¹⁸⁴Au[J]. Chinese Physics C, 2004, 28(9): 907-913.

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Received: 2004-02-03
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Investigation on Structural Properties of the πi_13/2⊙νi_13/22-qp Band in Odd-odd ¹⁸⁴Au

Corresponding author: ZHANG Yu-Hu,

Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China2 Graduate School,Chinese Academy of Sciences,Beijing 100039,China3 INFN,Laboratori Nazionali di Legnaro,Legnaro,Italy4 Department of Technical Physics and MOE Key Laboratory,Peking University,Beijing 100871,China

Received Date: 2004-02-03

Accepted Date: 1900-01-01

Available Online: 2004-09-05

Abstract: High-spin band structures in ¹⁸⁴Au have been re-investigated using the ¹⁵⁹Tb(²⁹Si,4nγ) ¹⁸⁴Au reaction and the multi-detector array of GASP.The rotational bands built on the πh_9/2⊙_{7/2- and πi_13/2⊙νi_13/2 2-quasiparticle configurations have been extended up to higher-spin states.Of most importance,linking transitions between the two bands and to the ground state have been established leading to firm spin and parity assignments for the πi_13/2⊙νi_13/2 band in ¹⁸⁴Au.This result provides a strong evidence for the prediction that the low-spin signature inversion could occur in the πi_13/2⊙νi_13/2 bands of odd-odd nuclei in the A≈180 mass region.The quasipartice alignments and the dynamical moment of inertia have been analyzed for the πi_13/2⊙νi_13/213/2 band in ^{184^{Au,the πi_13/2 and πh_9/2 bands in ¹⁸³Au,and the νi_13/2 band in ¹⁸³Pt.It is concluded that the first band-crossing observed in the πi_13/2⊙νi_13/2 band of ₁₈₄Au corresponds to a pair of h _9/2-proton alignment.This proton alignment may play important role in the πi_13/2 band of ¹⁸³Au,the νi_13/2 band of ¹⁸³Pt,as well as in the ground-state band of ¹⁸²Pt.}}}

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Investigation on Structural Properties of the πi_13/2⊙νi_13/22-qp Band in Odd-odd ¹⁸⁴Au

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Investigation on Structural Properties of the πi_13/2⊙νi_13/22-qp Band in Odd-odd ¹⁸⁴Au

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