有限核多重碎裂中的临界行为与临界指数的提取

Critical Behavior of Multifragmentation in Finite Nuclei and Extraction of Critical Exponents

利用非对称核物质状态方程可以得到有限核112Sn的压强-密度等温线,并对其在坐标和动量空间中的分布进行了模拟,采用了并合模型对形成的核碎片进行了构造．通过碎片的关联分析,寻找出了临界行为的信号,提取了临界指数．

Using a phenomenological asymmetric nuclear equation of state, we obtained pressure-density isotherms of the finite nucleus ^112Sn simulated in r-space and in p-space and constructed the nuclear fragments by using the coalescence model. After correlatively analysing the fragments, the signal of critical behavior has been found and critical exponents were also extracted.