Original Articles |
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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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Cite this article: |
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.
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Keywords:
21.10.Re
23.20.Lv
21.60.Ev
27.60.+j
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Published: 01 August 2001
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