畸变波法和$\boldsymbol{R}$矩阵法计算混浊度的定量比较
A Quantitative Comparison of Opacities Calculated Using the Distorted- Wave and $\boldsymbol{R}$-Matrix Methods
摘要：
随着桑迪亚国家实验室（Sandia National Laboratory）\citep{Bailey2015}最近在Z机上对Fe不透明度的测量，目前关于天体物理学不透明度可靠性的争论达到了一个新的高潮。为了理解理论结果与实验结果之间的差异，以及各种理论结果之间的差异，需要进行详细的比较。在计算不透明度时涉及许多因素;有必要解构整个过程并比较每个步骤的差异，以量化其重要性和对最终结果的影响。我们在这里提出这样的比较使用两种主要的方法来计算所需的原子数据，$R$矩阵和扭曲波的方法，以及组的配置和耦合方案，以量化的不透明度为$Fe\ XVII$和$Ni\ XIV$离子的影响。
英文摘要：
The present debate on the reliability of astrophysical opacities has reached a new climax with the recent measurements of Fe opacities on the Z-machine at the Sandia National Laboratory \citep{Bailey2015}. To understand the differences between theoretical results, on the one hand, and experiments on the other, as well as the differences among the various theoretical results, detailed comparisons are needed. Many ingredients are involved in the calculation of opacities; deconstructing the whole process and comparing the differences at each step are necessary to quantify their importance and impact on the final results. We present here such a comparison using the two main approaches to calculate the required atomic data, the $R$-Matrix and distorted-wave methods, as well as sets of configurations and coupling schemes to quantify the effects on the opacities for the $Fe\ XVII$ and $Ni\ XIV$ ions.
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