| 原子核液气相变的动力学研究 |
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| 引用本文： | 张英逊,吴锡真,李祝霞. 原子核液气相变的动力学研究[J]. 中国物理 C, 2002, 26(10): 1065-1071 |
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| 作者姓名： | 张英逊 吴锡真 李祝霞 |
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| 作者单位： | [1]中国原子能科学研究院,北京102413 [2]兰州重离子加速器国家重点实验室核理论中心,兰州730000 |
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| 基金项目： | 国家自然科学基金 (1 9975 0 73,1 0 1 75 0 89,1 0 1 75 0 93 ),核工业基金和国家重点基础研究发展规划项目 (G2 0 0 0 7740 0 )资助~~ |
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| 摘 要： | 应用量子分子动力学模型,从原子核发生碎化时的碎块质量分布、密度涨落以及混沌动力学中描述混沌程度的最大Lyapunov指数等3个方面,对原子核的液气相变及其在临界点附近的行为进行较为全面的探讨.通过研究,发现在临界温度附近原子核发生最大的液气共存、密度涨落达到极大以及产生最大混沌构型.
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| 关 键 词： | 相变 最大Lyapunov指数 碎块质量分布 密度涨落 |
| 收稿时间： | 2001-11-07 |
Dynamical Behaviors of Liquid-Gas Phase Transition in Nuclei |
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| ZHANG Ying Xun WU Xi Zhen , LI Zhu Xia ,. Dynamical Behaviors of Liquid-Gas Phase Transition in Nuclei[J]. High Energy Physics and Nuclear Physics, 2002, 26(10): 1065-1071 |
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| Authors: | ZHANG Ying Xun WU Xi Zhen LI Zhu Xia |
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| Affiliation: | ZHANG Ying Xun 1 WU Xi Zhen 1,2 LI Zhu Xia 1,2,3 1 |
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| Abstract: | Based on the quantum molecular dynamics model, the dynamical behaviors of the Liquid gas phase transition in nuclei are investigated. In order to explore the characters of the Liquid gas phase transition in the vicinity of the "critical point", the Maximum Lyapunov exponent (MLE) is employed and the method of calculation of the MLE is developed. The dependence of the mass distribution of fragments, density fluctuation and the MLE on temperature has been studied for nuclear systems 124 Sn and 208 Pb. As the main results, we have found that for heavy nuclear systems the MLE and the density fluctuation reach the maximum values at the same temperature, in which the maximum liquid gas coexistence region is also found from the mass distribution of fragments. |
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| Keywords: | phase transition maximum lyapunov exponent mass distribution of fragment density fluctuation |
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