Unified description for the nuclear equation of state and fragmentation in heavy-ion collisions.
Unified description for the nuclear equation of state and fragmentation in heavy-ion collisions.
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DOI：
10.1103/physrevc.51.1384
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发表时间：
1995-01
期刊：
影响因子：
--
通讯作者：
Jicai Pan;Subal Das Gupta
中科院分区：
文献类型：
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作者：
Jicai Pan;Subal Das Gupta
我们提出了一个模型，提供了一个统一的描述核状态方程和碎裂。在Bragg-Williams近似和Bethe-Peierls近似下对状态方程进行了计算，并与Skyrme相互作用下的平均场理论进行了比较。该模型显示了液体-气体型相变。研究了有限温度下不同密度核碎片的分布。在临界点处观察到碎片的幂律行为。碎片分布和二阶矩[italS][sub 2]的研究表明，在临界密度下，热临界点与渗流点重合。模型的高温行为表现出化学平衡的特征。
We propose a model that provides a unified description of the nuclear equation of state and fragmentations. The equation of state is evaluated in the Bragg-Williams as well as in the Bethe-Peierls approximations and compared with that in the mean field theory with Skyrme interactions. The model shows a liquid-gas type phase transition. The nuclear fragment distributions are studied for different densities at finite temperatures. Power law behavior for fragments is observed at the critical point. The study of the fragment distribution and the second moment [ital S][sub 2] shows that the thermal critical point coincides with the percolation point at the critical density. High temperature behavior of the model shows characteristics of chemical equilibrium.