Bonn 2025 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 20: Poster – Atomic Clusters
A 20.5: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Disentangling hard x-ray induced relaxation mechanisms in atomic clusters using multiparticle coincidence spectroscopy — •Niklas Golchert1, Yusaku Terao1, Emilia Heikura1, Madhusree Roy-Chowdhury1, Minna Patanen2, Oksana Travnikova3, 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, University of Oulu, PO Box 3000, Oulu 90014, Finland — 3Sorbonne Université, CNRS, UMR 7614, Laboratoire de Chimie Physique-Matière et Rayonnement, F-75005 Paris, France
Understanding the response of dense media to high-energetic photons, explicitly in the context of biological radiation damage, is essential for the targeted use of radiation therapy and the fundamental knowledge on electron correlations alike. Noble gas clusters often serve as prototype systems for fundamental research on dense media. For the analysis of the involved processes, electron spectroscopy is a sensitive tool, which is, however, challenged by the increasing number of possible mechanisms that accompany large amounts of stored energy. We employed multielectron-photon coincidence spectroscopy to investigate the behavior of prototypical argon clusters upon deep inner-shell ionization with hard x-rays to disentangle the consecutive relaxation mechanisms that may or may not involve neighboring constituents of a conglomerate of particles.
Keywords: Clusters; Coincidence spectroscopy; HAXPES; Auger-decay; ICD