We applied a relativistic configuration-interaction (CI) framework to the stabilization method as an approach for obtaining the autoionization resonance structure of heliumlike ions. In this method, the ion is confined within an impenetrable spherical cavity, the size of which determines the radial space available for electron wave functions and electron-electron interactions. By varying the size of the cavity, one can obtain the autoinization resonance position and width. The applicability of this method is tested on the resonances of He atom while comparing with benchmark data available in the literature. The present method is further applied on the determination of the resonance structure of heliumlike uranium ion, where a relativistic framework is mandatory. In the strong-confinement region, the present method can be useful to simulate the properties of an atom or ion under extreme pressure. An exemplary application of the present method to determine the structure of ions embedded in dense plasma environment is briefly discussed.

中文翻译：

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相对论构型-相互作用计算的稳定化方法应用于二电子共振

我们将相对论构型-相互作用（CI）框架应用于稳定化方法，作为获得类氦离子的自电离共振结构的方法。在这种方法中，离子被限制在不可渗透的球形腔内，球形腔的大小决定了可用于电子波功能和电子-电子相互作用的径向空间。通过改变空腔的尺寸，可以获得自动共振的位置和宽度。将该方法的适用性在He原子的共振上进行了测试，同时与文献中的基准数据进行了比较。本方法还用于确定像氦一样的铀离子的共振结构，其中相对论框架是强制性的。在强禁区，本方法可用于模拟极端压力下的原子或离子的性质。简要讨论了本方法确定在密集等离子体环境中嵌入的离子的结构的示例性应用。