Atomic Cascade Computations
Atomic Cascade Computations
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DOI：
10.3390/sym13030520
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发表时间：
2021-03-01
期刊：
影响因子：
2.7
通讯作者：
Schippers, Stefan
中科院分区：
文献类型：
--
作者：
Fritzsche, Stephan;Palmeri, Patrick;Schippers, Stefan
原子级联在自然界中无处不在，它们已经在非常不同的场景中进行了探索，从精确测量到天体物理光谱的建模，再到生物物质的辐射损伤。然而，到目前为止，这些级联的定量分析往往失败，因为其固有的复杂性。因此，除了利用原子的旋转对称性和适当区分不同的物理方案之外，还需要一系列有用的方法来保持级联计算的可行性。我们在这里提出了一个分类的原子级联，并演示了它们如何可以建模的框架内的耶拿原子计算器。作为一个例子，我们将在组态平均方法内计算原子镁的逐步衰变级联，遵循1s内壳层电离，并模拟相应的（最终）离子分布。我们的分类的物理方案（计划）和层次结构的计算方法都是灵活的，以进一步完善，以及复杂的壳结构的原子和离子，激发和衰变动力学需要建模的细节。
Atomic cascades are ubiquitous in nature and they have been explored within very different scenarios, from precision measurements to the modeling of astrophysical spectra, and up to the radiation damage in biological matter. However, up to the present, a quantitative analysis of these cascades often failed because of their inherent complexity. Apart from utilizing the rotational symmetry of atoms and a proper distinction of different physical schemes, a hierarchy of useful approaches is therefore needed in order to keep cascade computations feasible. We here suggest a classification of atomic cascades and demonstrate how they can be modeled within the framework of the Jena Atomic Calculator. As an example, we shall compute within a configuration-average approach the stepwise decay cascade of atomic magnesium, following a 1s inner-shell ionization, and simulate the corresponding (final) ion distribution. Our classification of physical scenarios (schemes) and the hierarchy of computational approaches are both flexible to further refinements as well as to complex shell structures of the atoms and ions, for which the excitation and decay dynamics need to be modeled in good detail.