Hannover 2020 – scientific programme
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A: Fachverband Atomphysik
A 13: Clusters II (joint session MO/A)
A 13.2: Talk
Tuesday, March 10, 2020, 14:15–14:30, f142
Competition between inter- and intra-atomic ionization phenomena: Observation of Electron-Transfer-Mediated decay and Auger decay in Xenon-doped water clusters — •Aaron Ngai1, Rupert Michiels1, Nora Berrah2, Carlo Callegari3, Edwin Chapman1, Raimund Feifel4, Michele Di Fraia3, Jakob Krull1, Aaron C. LaForge2, Paolo Piseri5, Oksana Plekan3, Kevin Prince3, Richard J. Squibb4, Vit Svoboda6, Daniel Uhl1, Hans-Jakob Wörner6, Andreas Wituschek1, and Frank Stienkemeier1 — 1Insititute of Physics, University of Freiburg — 2Department of Physics, University of Connecticut — 3Elettra-Sincrotrone Trieste — 4Department of Physics, University of Gothenburg — 5Dipartimento di Fisica and CIMaINa — 6Laboratorium für Physikaliche Chemie, ETH Zürich
Electron-transfer-mediated decay (ETMD) is a subset of the more general inter-coulombic decay (ICD). In condensed-matter or cluster systems, ETMD competes with other ionization processes such as autoionization (e.g. Auger decay). Using XUV-XUV pump-probe spectroscopy, we observe the competition between ETMD and Auger decay of Xe+ (4d3/2 and 4d5/2) embedded in water clusters. In particular, we can distinguish between these two similar processes by observing the resulting XeN+ ions in addition to time-resolving their femtosecond dynamics. In our experiment using the FERMI FEL at Elettra, two main features differentiating these decays are expected: the charges of the final XeN+ ions, and kinetic energy broadening of Auger electrons through post-collision interactions (PCI).