Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 37: Electron scattering and recombination

A 37.1: Hauptvortrag

Donnerstag, 20. März 2014, 10:30–11:00, BEBEL E42

Electron-impact ionization of highly-charged heavy ions relevant for plasma applications — •Alexander Borovik — Institut für Atom- und Molekülphysik, Universität Giessen

Accurate data on atomic processes are of crucial importance for the correct description and understanding of ionized-matter environments. The need for the huge amount of data on electron-impact ionization cross sections and plasma rate coefficients required for plasma modeling can only be met by theoretical calculations. However, for many-electron systems like heavy ions, an extremely complicated pattern of atomic processes makes the task to correctly predict the cross-sections and plasma-rate-coefficients challenging. An experimental approach, on the other hand, can give accurate data but only with a limited coverage of the required data amount and also has inherent limitations. We present a detailed study of electron-impact ionization cross-sections for highly-charged heavy ions involving both the measured results obtained from crossed-beam experiments and theoretical data calculated with the configuration-averaged distorted wave method. The combination of theory and experiment allows us to infer accurate plasma rate coefficients for plasma physics applications.