论文标题
超重核中的水平密度参数
Level-density parameters in superheavy nuclei
论文作者
论文摘要
我们使用木材 - 撒克逊势对角线化获得的单粒子能量，系统地研究了包括奇系统的超重核的核水平密度，包括奇数系统。在许多变形的基态的许多变形参数和许多变形的水流技术上的许多变形参数上的最小化已应用于鞍点的许多变形能网格，包括违反形状。水平密度参数是通过将所获得的结果与标准费米气体表达拟合来计算的。分析水平密度参数的总势能和壳校正依赖性，并在基态和鞍点上进行比较。将这些参数与现象学表达的结果进行比较。如图所示，应为鞍点修改该表达，尤其是对于较小的激发能。鞍点处的水平密度参数与基态下的水平密度参数的比率对于重核的存活率至关重要。
We systematically study the nuclear level densities of superheavy nuclei, including odd systems, using the single-particle energies obtained with the Woods-Saxon potential diagonalization. Minimization over many deformation parameters for the global minima - ground states and the "imaginary water flow" technique on many deformation energy grids for the saddle points, including nonaxial shapes has been applied. The level density parameters are calculated by fitting the obtained results with the standard Fermi gas expression. The total potential energy and shell correction dependencies of the level-density parameter are analyzed and compared at the ground state and saddle point. These parameters are compared with the results of the phenomenological expression. As shown, this expression should be modified for the saddle points, especially for small excitation energy. The ratio of the level-density parameter at the saddle point to that at the ground state is shown to be crucial for the survival probability of the heavy nucleus.
