论文标题
激发核在能量扩散状态下可变摩擦下的裂变率
Fission rate of excited nuclei at variable friction in the energy diffusion regime
论文作者
论文摘要
目前，众所周知，激发核的裂变是一个动态过程，是波动和耗散的主题。在文献中，有迹象表明，在紧凑的核形状下，与一体方法的预测相比，核摩擦的强度显着降低。因此，可以预期，在小变形下，核裂变过程发生在所谓的“能量扩散状态”中。我们目前的工作的目的是比较该制度中裂变率的近似分析公式与统计误差内的准确数值率。我们的计算表明，只要摩擦参数独立于变形，这两个速率之间的一致性相对较好。如果一个人占其变形依赖性，则该协议将变得明显差。
Presently, it is well established that fission of excited nuclei is a dynamical process being a subject of fluctuations and dissipation. In the literature, there are indications that, at the compact nucleus shapes, the strength of nuclear friction is significantly reduced in comparison with the prediction of the one-body approach. Thus, one can expect that at small deformations the nuclear fission process occurs in the so-called "energy diffusion regime". The purpose of our present work is to compare an approximate analytical formula for the fission rate in this regime with the quasistationary numerical rate which is exact within the statistical errors. Our calculations demonstrate relatively good agreement between these two rates provided the friction parameter is deformation independent. If one accounts for its deformation dependence, the agreement becomes significantly poorer.
