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Study of △I=2 staggering by perturbed particle-rotor model

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Science China Mathematics 1996年第12期39卷 1296-1303页

作者：邢正王晓春陈星蕖 (Department of Modern Physics Lanzhou University Lanzhou 730000 China)

AI=2 staggering in superdefonned nuclei has been investigated by a perturbed particle-rotor model, of which all observed features are reproduced in the calculations. It is pointed out that the C4symmetry in Hamiltonian is not the only cause of AI=2 staggering. This model can be used to make a fit to the experimental data in odd-A superdeformed nuclei.

关键词： nuclear structure superdeformation particle-rotor model C4 symmetry △I=2 staggering.

Properties of the 3/2^-[521] band in the odd-N rare-earth nuclei

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Science China(Physics,Mechanics & Astronomy) 2011年第S1期54卷 37-43页

作者： CHEN Liang1,2, ZHOU XiaoHong1,2, ZHANG YuHu1, ZHANG ShuangQuan3 & ZHU LiHua4 1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China 4China Institute of Atomic Energy, Beijing 102413, China Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Graduate University of Chinese Academy of Sciences Beijing China State Key Laboratory of Nuclear Physics and Technology School of Physics Peking University Beijing China China Institute of Atomic Energy Beijing China

High-spin states in 161Er have been studied experimentally via the 150Nd(16O, 5n) reaction at a beam energy of 86 MeV. Three rotational bands built on the 5/2+[642], 3/2-[521], and 11/2-[505] configurations have been extended up to high-spin states, and particularly, the α = -1/2 branch of the ground state 3/2-[521] band has been revised significantly. It is found that signature inversion occurs in the 3/2-[521] band after the band crossing in 161Er. The systematics of the signature inversion associated with the 3/2-[521] configuration in the rare-earth region is discussed. The band properties are analyzed within the framework of a triaxial particle-rotor model, and a triaxial deformation is proposed to the 3/2-[521] band.

关键词： high-spin states signature inversion triaxial particle-rotor model

Band structure of superdeformed bands in odd-A Hg nuclei

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Science China Mathematics 1997年第4期40卷 400-407页

作者：陈星渠邢正 Department of Modern Physics Lanzhou University Lanzhou 730000 China

Through particle-rotor model, band structure of superdeformed bands in odd-A Hg nuclei is analysed. An overall and excellent agreement between the calculated and observed kinematic and dynamic moments of inertia is obtained. The electromagnetic transition properties of SD bands can be used to identify the configuration with certainty.

关键词： nuclear structure superdeformed bands particle-rotor model electromagnetic transition.

Configuration Assignment of Superdeformed Bands in Odd-A Hg nuclei

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Chinese journal of nuclear physics 1994年第2期16卷 133-138页

作者： Chen, Xingqu Xing, Zheng Lanzhou Univ Lanzhou China

-By using particle-rotor model,the configuration of the superderformed(SD)bands in odd-A Hg nuclei is *** is shown that the electromagnetic transitionproperties of the SD bands can be used to further identify the conf... 详细信息

关键词： Nuclear structure Superdeformed bands particle-rotor model Configuration assignment

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Analysis of *** Bands

Chinese journal of nuclear physics 1995年第1期17卷 40-42页

作者： Chen, Xingqu Xing, Zheng Lanzhou Univ Lanzhou China

Identical superdeformed bands in 191Au and 191Hg have been investigated byusing particle-rotor model within the framework of the BCS （Bardeen-Cooper-Schrieffer） pairing *** identity in the γ-transition energies in ... 详细信息

关键词： Superdeformed bands Identical bands particle-rotor model

Calculations of Superdeformed Bands in j_(15/2^-)Model

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Chinese journal of nuclear physics 1994年第3期 233-238页

作者： Chen Xing-qu Xing Zheng (Department of Modern Physics,Lanzhou University,Lanzhou 730000)

Using the particle-rotor model,some features of superdeformed bands builtupon j15 orbitals have been *** excellent agreement between the caleu-lated and observed transition energies,kinematic and dynamic moments of in... 详细信息

关键词： Nuelear structure Superdeformed bands particle-rotor model Electromagnetic transition

Analysis of Superdeformed Band of ^(193)TI

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Chinese journal of nuclear physics 1994年第1期 50-54页

作者： Chen Xingqu Xing Zheng (Department of Modern Physics Lanzhou University.Lanzhou 730000)

Superdeformed bands of 193TI are analyzed by using particle-rotor model inconnection with experimental data,considering the possible occurrence of *** is investigated that γ-transition energies and dynamic moments of... 详细信息

关键词： Superdeformed bands particle-rotor model Triaxial deformation