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MO: Fachverband Molekülphysik
MO 14: Atomic Clusters (joint session A/MO)
MO 14.1: Vortrag
Mittwoch, 13. März 2024, 14:30–14:45, HS 1015
Experimental studies on core-level interatomic Coulombic decay in heterogeneous rare gas clusters — •Catmarna Küstner-Wetekam1, Lutz Marder1, Dana Bloß1, Christina Zindel1, Uwe Hergenhahn2, Arno Ehresmann1, Přemysl Kolorenč3, and Andreas Hans1 — 1Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany — 3Institute of Theoretical Physics, Charles University, V Holesovickach 2, 180 00 Prague, Czech Republic
To understand the fundamental mechanisms of radiation chemistry in realistic environments, it is crucial to examine prototypical systems where molecules or atoms interact with their surroundings. Weakly bound van der Waals clusters serve as promising model systems for investigating novel relaxation pathways. In contrast to isolated atoms, electronically excited states may now decay via different interatomic processes such as interatomic Coulombic decay (ICD) or radiative charge transfer (RCT). Due to the relatively low probability of ICD following inner-shell ionization in rare gas clusters, multicoincidence spectroscopy is essential for its detection. Here, we present the observation of changes in branching ratios when going from homogeneous Ar and Kr clusters to heterogeneous ArKr clusters. This transition effectively introduces a distinct environment for the excited atom in each cluster, providing valuable insights into the influence of cluster composition on interatomic decay pathways.
Keywords: rare gas clusters; Auger decay; interatomic Coulombic decay (ICD); Coincidence spectroscopy; Branching ratios