Freiburg 2024 – scientific programme

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MO: Fachverband Molekülphysik

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

MO 14.3: Talk

Wednesday, March 13, 2024, 15:00–15:15, HS 1015

Disentangling the decay cascade of inner-shell vacancies in krypton clusters — •Lutz Marder, Catmarna Küstner-Wetekam, Niklas Golchert, Johannes Viehmann, Emilia Heikura, Nils Kiefer, Arno Ehresmann, and Andreas Hans — Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

Noble gas clusters represent prototype systems well-suited for the investigation of fundamental atomic and molecular processes; their van der Waals bonds enable new relaxation pathways not available in isolated systems. Many of these have been studied during the recent years, often using coincidence measurement techniques.

Our state-of-the-art experiment, where electrons and photons are detected in coincidence, allows for investigation of multi-particle decay pathways after ionization with synchrotron radiation. Upon introduction of an inner-shell vacancy in a homogeneous Kr cluster, the well-known atomic relaxation pathways – consisting of Auger-Meitner decays and fluorescence – is altered significantly by the opening of new interatomic relaxation mechanisms such as interatomic Coulombic decay (ICD), electron-transfer mediated decay (ETMD) and radiative charge transfer (RCT), all of which have been observed and are presented here.

Keywords: noble gas clusters; Auger-Meitner decay; interatomic Coulombic decay (ICD); electron-transfer mediated decay (ETMD); radiative charge transfer (RCT)