Freiburg 2024 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 14: Atomic Clusters (joint session A/MO)

MO 14.5: Vortrag

Mittwoch, 13. März 2024, 15:30–15:45, HS 1015

Extreme shift of Auger cascade energies after deep inner-shell ionization in rare-gas clusters — •Niklas Golchert¹, Nils Kiefer¹, Catmarna Küstner-Wetekam¹, Lutz Marder¹, Minna Patanen², Christina Zindel¹, Arno Ehresmann¹, and Andreas Hans¹ — ¹Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — ²Nano and Molecular Systems Research Unit, Faculty of Science, P.O. Box 3000, FI-90014, University of Oulu, Oulu, Finland

Closing the gap between isolated atoms and macroscopic objects, clusters serve as ideal prototype systems for fundamental research of local and non-local processes in dense media. By investigating their electron emission spectra after photoionization, detailed insights about the interactions between the constituents of a medium are gained.

Here, we present recent experimental results obtained by multielectron coincidence spectroscopy showing the strong dependence of Auger cascade energies in clusters on the charge state of the emitting ion caused by the polarization of its surrounding. These findings will deliver valuable information for future spectroscopic experiments on dense media such as clusters or liquids using high-energetic light sources.

Keywords: Cluster; Auger decay; Polarization screening; Coincidence spectroscopy