Chin. Phys. Lett.  2001, Vol. 18 Issue (8): 1027-1029    DOI:
Original Articles |
The πh11/2 Band-Crossing and Possible Octupole Correlations in 122Ba
ZHU Sheng-Jiang1;M. Sakhaee1;YANG Li-Ming1;GAN Cui-Yun1;ZHU Ling-Yan1;XU Rui-Qing1;JIANG Zhuo1;ZHANG Zheng1;LONG Gui-Lu1;WEN Shu-Xian2;WU Xiao-Guang2
1Department of Physics, Tsinghua University, Beijing 100084 2China Institute of Atomic Energy, Beijing 102413
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ZHU Sheng-Jiang, M. Sakhaee, YANG Li-Ming et al  2001 Chin. Phys. Lett. 18 1027-1029
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Abstract High-spin states in 122Ba have been investigated in the 107Ag(19F, 4n) reaction by in-beam γ-ray spectroscopic methods. The ground-state band has been observed with spin up to 20ħ and a negative-parity band is identified with spin state up to 19ħ. A band-crossing in the yrast band is observed at a rotational frequency of ħω ≈ 0.36 MeV and, in accordance with cranked shell model calculations, is interpreted as arising from the alignment of two h11/2 protons. Strong E1 transitions between the negative-parity and the yrast bands have been observed, which are proposed as possible evidence for octupole correlations.
Keywords: 21.10.Re      23.20.Lv      21.60.Ev      27.60.+j     
Published: 01 August 2001
PACS:  21.10.Re (Collective levels)  
  23.20.Lv (γ-transitions and level energies)  
  21.60.Ev (Collective models)  
  27.60.+j (90 ≤ A ≤ 149)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I8/01027
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ZHU Sheng-Jiang
M. Sakhaee
YANG Li-Ming
GAN Cui-Yun
ZHU Ling-Yan
XU Rui-Qing
JIANG Zhuo
ZHANG Zheng
LONG Gui-Lu
WEN Shu-Xian
WU Xiao-Guang
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