论文标题
裂变片段固有的旋转及其相关性
Fission fragments intrinsic spins and their correlations
论文作者
论文摘要
固有的旋转及其相关性是从理论和实验的观点均不理解裂变片段的特征。在许多核反应中，新出现的片段通常会激发，并根据反应和相互作用机制的类型获得内在的激发能和内在的自旋。固有的激发能和片段内在的旋转和平等均受到相互作用机制和保护定律的控制，这会导致它们的相关性并确定其去激发机制的特征。我们在这里概述了一个理论提取片段的固有自旋分布及其在完全显微镜实时密度功能理论形式上形式主义中的固有自旋分布的框架，并在诱导$^{236} $ u和$^{240} $ PU的诱导裂变的示例中进行了说明，并使用两个核能函数函数。这些裂变片段固有的自旋分布显示了以前在文献中未讨论的新定性特征。在这个完全的微观框架中，我们首次提取$^{236} $ u和$^{240} $ pu的裂变片段的内在自旋分布以及其内在旋转的相关性，这些旋转的相关性在文献中已经在文学中持续了六十多年，却没有确定的结论。
The intrinsic spins and their correlations are the least understood characteristics of fission fragments from both theoretical and experimental points of view. In many nuclear reactions the emerging fragments are typically excited and acquire an intrinsic excitation energy and an intrinsic spin depending on the type of the reactions and interaction mechanism. Both the intrinsic excitation energies and the fragments intrinsic spins and parities are controlled by the interaction mechanism and conservations laws, which lead to their correlations and determines the character of their de-excitation mechanism. We outline here a framework for the theoretical extraction of the intrinsic spin distributions of the fragments and their correlations within the fully microscopic real-time density functional theory formalism and illustrate it on the example of induced fission of $^{236}$U and $^{240}$Pu, using two nuclear energy density functionals. These fission fragment intrinsic spin distributions display new qualitative features previously not discussed in literature. Within this fully microscopic framework we extract for the first time the intrinsic spin distributions of fission fragments of $^{236}$U and $^{240}$Pu as well as the correlations of their intrinsic spins, which have been debated in literature for more than six decades with no definite conclusions so far.
