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Collective Perspective on Advances in Dyson-Schwinger Equation QCD

ISSN号：0253-6102
期刊名称：Communications in Theoretical Physics
时间：2012.7.7
页码：79-134
分类：O4-33[理学—物理] U463.341[机械工程—车辆工程;交通运输工程—载运工具运用工程;交通运输工程—道路与铁道工程]
作者机构：[1]Department of Physics, Huzhou Teacher's College, Huzhou 313000, China
相关基金：Supported by the National Natural Science Foundation of China under Grant No. 11075052 and the Natural Science Foundation of Zhejiang Province under Grant No. KY6100135
相关项目：高温高密强相互作用物质性质的研究

关键词：结构演变, 演进, 相互作用模型, 实验数据, 同位素链, 形状相变, 同位素特征, 能量水平, ^124-134Xe , shape phase transition, Uπν （5）-SUπν^＊（3） transition, IBM2

中文摘要：

We have investigated the structure evolution of the124-134Xe isotopic chain in the framework of the proton-neutron interacting model IBM2. The positive parity spectra of the ground state, quasi-β and quasi-γ bands are reproduced well. The staggering in124-130Xe are almost completely removed and the γ band agree well with the experiment data, even for the high-spin quasi-γ states. The key quantities of the collective structure evolution, including level energies, the B(E2) transition branching ratios, and the M1 excitations to 1+1mixer-symmetry states are analyzed by comparing with the experimental data. The parameters for representation of the Oπν(6) and SU πν(3) features in isotopes are examined. Both experimental data and theoretical results show that the shape phase transition of124 134Xe isotopic chain is from the SU πν(3)(triaxial rotation) to the Uπν(5)(vibration motion) with a considerable constituent of the Oπν(6) symmetry(γ-unstable rotation), where the shape phase transition rapidly takes place between the neutron number N = 76 and N = 78.

英文摘要：

We have investigated the structure evolution of the ^124-134Xe isotopic chain in the framework of the proton-neutron interacting model IBM2. The positive parity spectra of the ground state, quasi-β and quasi-γ bands are reproduced well. The staggering in ^124-130Xe are almost completely removed and the ？ band agree well with the experiment data, even for the high-spin quasi-3 states. The key quantities of the collective structure evolution, including level energies, the B（E2） transition branching ratios, and the M1 excitations to 11^＋ mixer-symmetry states are analyzed by comparing with the experimental data. The parameters for representation of the Oπν（6） and SUπν^＊（3） features in isotopes are examined. Both experimental data and theoretical results show that the shape phase transition of ^124-134Xe isotopic chain is from the SUπν^＊（3）（triaxial rotation） to the Uπν（5）（vibration motion） with a considerable constituent of the Oπν（6） symmetry （γ-unstable rotation）, where the shape phase transition rapidly takes place between the neutron number N = 76 and N = 78.

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