Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 25: Poster Session I

A 25.3: Poster

Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal

Condensation effects and interatomic processes in noble gases investigated by cathodoluminescence — •Catmarna Küstner-Wetekam, Andreas Hans, Xaver Holzapfel, Philipp Schmidt, Christian Ozga, Gregor Hartmann, Arno Ehresmann, and André Knie — Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

The condensation behaviour and properties of electronic decay processes of noble gases sensitively depend on their atomic number. The grade of condensation strongly impacts the radiative properties of these systems such as line width and spectral shapes. Therefore the luminescence spectra acts as a fingerprint of these systems. Here, we present luminescence spectra from helium, neon, and argon jets produced by supersonic expansion from a cryogenic cluster source after electron impact excitation. As an outlook, we compare them with emission after site-selective photo-excitation and suggest the investigation of various interatomic processes by cathodoluminescence. Finally, we envision our method to be of importance for many schemes, in which electrons are emitted by any means in large clusters, because they can subsequently induce emissions comparable to direct cathodoluminescence.