Mainz 2026 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
MO: Fachverband Molekülphysik
MO 27: Molecular Spectroscopy II
MO 27.2: Talk
Thursday, March 5, 2026, 14:45–15:00, P 204
First Observation of Resonant Auger-Driven Intermolecular Coulombic Decay in Aqueous Solutions — •Dana Bloß1, Rémi Dupuy2, Florian Trinter3, Noelle Walsh4, Gunnar Öhrall4, Niklas Golchert1, Gabriel Klassen1, Adrian Krone1, Yusaku Terao1, Johannes H. Viehmann1, Lorenz S. Cederbaum5, Uwe Hergenhahn3, Olle Björneholm6, Arno Ehresmann1, and Andreas Hans1 — 1Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2Laboratoire de Chimie Physique - Matière et Rayonnement, CNRS, LCP-MR, Sorbonne Université — 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany — 4MAX IV Laboratory, Lund University, Box 118, 22100 Lund, Sweden — 5Theoretische Chemie, Institut für Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany — 6Department of Physics and Astronomy, Uppsala University, Box 516, 75120 Uppsala, Sweden
Over the last decades, non-local ionization mechanisms such as interatomic Coulomb decay (ICD) have attracted considerable interest, primarily due to their potential significance for radiation biology. Here, we report the first experimental observation of resonant Auger decay-induced ICD (RA-ICD) in a liquid environment. The process was identified in solvated Ca ions using a combination of high-resolution and coincident electron spectroscopy on liquid microbeams. RA-ICD enables the site-specific and energy-specific generation of low-energy electrons, which are known for their genotoxicity.
Keywords: Intermolecular Coulombic Decay (ICD); Photoelectron spectroscopy on liquids; Electron coincidence spectroscopy