论文标题
非平衡信息熵方法用于肌动剂的三元裂变
A Nonequilibrium Information Entropy Approach to Ternary Fission of Actinides
论文作者
论文摘要
actinides的三元裂变可在细胞时探测细胞核的状态。光簇在空间和时间上产生非常接近分离点的时间。在非平衡统计运算符方法中，根据观察到的同位素的产量给出的信息构建了广义的Gibbs分布。使用此相关的统计运算符，根据状态方程的病毒扩展，计算出收益率，以激发状态和连续相关性。使用温度和化学电位的非平衡概括，具有质量数$ a \ le 10 $的群集被很好地描述。改善病毒式扩张，中等效应可能在确定弱结合状态和连续体相关性对内在分区函数的贡献方面可能变得重要。较大的簇的产量未能达到相关分布的这种准平衡形式，由成核动力学描述，并且推断出大约7000 fm/c的鞍形弛豫时间。因此，通过反应动力学和病毒膨胀描述的光带电颗粒发射可以被视为探测裂变过程中肌动蛋白核的非平衡时间演变的非常重要的工具。
Ternary fission of actinides probes the state of the nucleus at scission. Light clusters are produced in space and time very close to the scission point. Within the nonequilibrium statistical operator method, a generalized Gibbs distribution is constructed from the information given by the observed yields of isotopes. Using this relevant statistical operator, yields are calculated taking excited states and continuum correlations into account, in accordance with the virial expansion of the equation of state. Clusters with mass number $A \le 10$ are well described using the nonequilibrium generalizations of temperature and chemical potentials. Improving the virial expansion, in-medium effects may become of importance in determining the contribution of weakly bound states and continuum correlations to the intrinsic partition function. Yields of larger clusters, which fail to reach this quasi-equilibrium form of the relevant distribution, are described by nucleation kinetics, and a saddle-to-scission relaxation time of about 7000 fm/c is inferred. Light charged particle emission, described by reaction kinetics and virial expansions, may therefore be regarded as a very important tool to probe the nonequilibrium time evolution of actinide nuclei during fission.
