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题名: Connection between the largest Lyapunov exponent, density fluctuation, and multifragmentation in excited nuclear systems
作者: Zhang, YX ;  Wu, XZ ;  Li, ZX
刊名: PHYSICAL REVIEW C
出版日期: 2004
卷号: 69, 期号:4, 页码:-
关键词: QUANTUM MOLECULAR-DYNAMICS ;  HEAVY-ION COLLISIONS ;  GAS PHASE-TRANSITION ;  FRAGMENT FORMATION ;  ENERGY FLUCTUATIONS ;  DROPS ;  MODEL ;  CHAOS ;  STATE
学科分类: Physics
通讯作者: Zhang, YX , Inst Atom Energy, POB 275 18, Beijing 102413, Peoples R China.
部门归属: Inst Atom Energy, Beijing 102413, Peoples R China; Natl Lab Heavy Ion Accelerator, Ctr Nucl Theory, Lanzhou 730000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: Within a quantum molecular dynamics model we calculate the largest Lyapunov exponent (LLE), the density fluctuation, and the mass distribution of fragments for a series of nuclear systems at different initial temperatures. It is found that the LLE peaks at the temperature ("critical temperature") where the density fluctuation reaches a maximal value and the mass distribution of fragments is best fitted by the Fisher's power law from which the critical exponents for mass and charge distribution are obtained. The time-dependent behavior of the LLE and density fluctuation is studied. We find that the time scale of the density fluctuation is much longer than that of the inverse LLE, which indicates that chaotic motion can be well developed during the process of fragment formation. The finite-size effect on "critical temperature" for nuclear systems ranging from calcium to superheavy nuclei is also studied.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000221427500044
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14104
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Zhang, YX,Wu, XZ,Li, ZX. Connection between the largest Lyapunov exponent, density fluctuation, and multifragmentation in excited nuclear systems[J]. PHYSICAL REVIEW C,2004,69(4):-.
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