Chinese Physics C > 2004, Vol. 28 > Issue(S1): 5-10

High Spin-States and Shape Driving Effects in A=130 Nuclear Region

Department of Physics, Tsinghua University, Beijing 100084，China2 China Institute of Atomic Energy, Beijing 102413, China

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Through ¹²²Sn( ¹⁶O,4n), ¹³⁰Te( ¹¹B,5n)and ¹⁰⁷Ag( ¹⁹F,1p3n) heavy-ion nuclear reactions and in-beam γ-ray spectroscopy technique, high spin states of ¹³⁴Ce, ¹³⁶La and ¹²²Cs have been studied. The previous level schemes have been extended. The observed results show that the collective band structures in these three nuclear were affected by the shape-driving effects. The shape coexistence with different γ deformations has been observed in ¹³⁴Ce. In ¹³⁶La, the πh _11/2⊙νh _11/2band was updated and its character has been discussed while two oblate bands with γ≈－60° have been established. In ¹²²Cs chiral doublet bands were proposed. The magnetic rotational bands reported in a recent paper in ¹³⁴Ce were not confirmed by our experiment.

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ZHU Sheng-Jiang, U Yong-Nan, XIAO Shu-Dong, CHE Xing-Lai, LI Ming-Liang, GAN Cui-Yun, XU Rui-Qing, CHEN Yong-Jing, ZHU Li-Hua, WEN Shu-Xian, WU Xiao-Guang, High Spin-States and Shape Driving Effects in A=130 Nuclear Region[J]. Chinese Physics C, 2004, 28(S1): 5-10.

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Received: 2004-12-30
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

High Spin-States and Shape Driving Effects in A=130 Nuclear Region

Corresponding author:ZHU Sheng-Jiang,

Department of Physics, Tsinghua University, Beijing 100084，China2 China Institute of Atomic Energy, Beijing 102413, China

Received Date:2004-12-30
Accepted Date:1900-01-01
Available Online:2004-04-02

Abstract:Through¹²²Sn(¹⁶O,4n),¹³⁰Te(¹¹B,5n)and¹⁰⁷Ag(¹⁹F,1p3n) heavy-ion nuclear reactions and in-beam γ-ray spectroscopy technique, high spin states of¹³⁴Ce,¹³⁶La and¹²²Cs have been studied. The previous level schemes have been extended. The observed results show that the collective band structures in these three nuclear were affected by the shape-driving effects. The shape coexistence with different γ deformations has been observed in¹³⁴Ce. In¹³⁶La, the πh_11/2⊙νh_11/2band was updated and its character has been discussed while two oblate bands with γ≈－60° have been established. In¹²²Cs chiral doublet bands were proposed. The magnetic rotational bands reported in a recent paper in¹³⁴Ce were not confirmed by our experiment.