A quantum chemical model for the study of the electronic structure of compressed atoms lends itself to a perturbation-theoretic analysis. It is shown, both analytically and numerically, that the increase of the electronic energy with increasing compression depends on the electronic configuration, as a result of the variable spatial extent of the atomic orbitals involved. The different destabilization of the electronic states may lead to an isobaric change of the ground-state electronic configuration, and the same first-order model paves the way to a simple thermodynamical interpretation of this process.

中文翻译：

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压缩原子中的各种电子构型：从原子轨道空间扩展的作用到作为等压转换的电子构型的变化。

用于研究压缩原子的电子结构的量子化学模型有助于进行扰动理论分析。从分析和数值上都表明，随着所涉及的原子轨道的空间范围的变化，随着压缩的增加，电子能量的增加取决于电子结构。电子态的不同不稳定可能导致基态电子构型的等压变化，并且相同的一阶模型为该过程的简单热力学解释铺平了道路。