SAMOP 2023 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 21: Molecular Physics with X-rays
MO 21.2: Vortrag
Freitag, 10. März 2023, 11:15–11:30, F102
Experimental investigation of solvated metal ions after X-ray-induced ionization — •Dana Bloß1, Florian Trinter2,3, Uwe Hergenhahn2, Arno Ehresmann1, and Andreas Hans1 — 1Institut für Physik und Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin — 3Institut für Kernphysik, Goethe-Universität, Max-von-Laue-Str.1, 60438 Frankfurt am Main
Exploration of the microscopic response of biological systems to ionizing radiation is a key to understanding radiation damage on a molecular level. Of special interest in this context are low-energy electrons (LEEs) with energies below 30 eV, which are known to be genotoxic. One source of these LEEs upon X-ray irradiation are secondary processes like the interatomic Coulombic decay (ICD) - an energy-transfer process - or the electron-transfer-mediated decay (ETMD) - a charge-transfer process. Both have attracted attention as a source of efficient localized emission of LEEs close to the site of ionization and been studied intensely throughout the last decades in clusters and solutions. A multi-step cascade of ICD and ETMD processes upon X-ray ionization of microsolvated metal ions, e.g., Mg2+, was predicted. We experimentally investigate this theoretically predicted LEE emission for Mg2+, Ca2+ and Al3+ solutions at different synchrotron facilities with a combination of liquid microjets and coincident electron detection.