SAMOP 2023 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Poster I
A 12.25: Poster
Dienstag, 7. März 2023, 16:30–19:00, Empore Lichthof
Search for double core-hole states in Xe clusters — •Niklas Golchert1, Nils Kiefer1, Lutz Marder1, Catmarna Küstner-Wetekam1, Emilia Heikura1, Johannes Viehmann1, Francis Penent2, Jérôme Palaudoux2, Christophe Nicolas3, Arno Ehresmann1, and Andreas Hans1 — 1Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2Sorbonne Université, CNRS, Laboratoire de Chimie Physique-Matière et Rayonnement, LCPMR, F-75005 Paris Cedex 05, France — 3Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP 48, F-91192 Gif-sur-Yvette Cedex, France
Excited or ionized loosely bound atomic or molecular systems like clusters may undergo new interatomic and intermolecular relaxation processes being impossible in isolated systems. Noble-gas clusters are, due to their low chemical reactivity, well suited to investigate such fundamental relaxation processes. In the present work, the formation and decay of double core-holes (DCHs) in the 4d shell of xenon clusters upon photoionization is investigated. DCHs can enhance the chemical shift in molecules, which makes them important in ESCA (Electron Spectroscopy for chemical analysis). Two different paths were used to create the double core-holes, namely single-photon double ionization, and via M4,5N4,5N4,5 Auger after single-photon 3d-electron photoionization. Measurements were performed with a multi-electron coincidence technique using a magnetic-bottle-type time-of-flight spectrometer and synchrotron radiation. Here, we present first results of the outlined processes.