Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster Session I
A 25.26: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
Accurate modeling of Auger cascades and its applications — •Sebastian Stock1,2, Randolf Beerwerth1,2, and Stephan Fritzsche1,2 — 1Helmholtz-Institut Jena, 07743 Jena, Germany — 2Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
Inner-shell excitation or ionization of atoms and ions usually leads to a cascade of autoionization processes. In the past decade, advances in experimental techniques such as modern UV and X-ray sources as well as ultrafast time-resolved spectroscopy have fueled considerable interest in the study of complex decay cascades. Our approach to an accurate description of these decay cascades is based on extensive multiconfiguration Dirac–Fock calculations on a fine-structure level. In order to achieve good results within the limits of todays computational power, we employ models of varying sophistication, including important electron correlation effects and higher-order effects such as shake processes [1, 2]. Apart from showing our theoretical modeling in general, we here present our recent results on Auger cascades in singly-charged silicon and neutral krypton [3] which have been conducted in collaboration with different experimental groups.
[1] S. Schippers et al., Phys. Rev. A 94, 041401 (2016).
[2] S. Stock, R. Beerwerth, and S. Fritzsche, Phys. Rev. A 95, 053407 (2017).
[3] K. Hütten et al., submitted 2017.