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MO: Fachverband Molekülphysik
MO 19: MO Poster 4
MO 19.9: Poster
Donnerstag, 12. März 2020, 17:00–19:00, Empore Lichthof
Multi-electron coincidence study on inner-shell ionized water clusters — •Christina Zindel1, Andreas Hans1, Arno Ehresmann1, Uwe Hergenhahn2, and André Knie1 — 1Institut für Physik und CINSaT, University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
Since the environment of a single atom or molecule plays an important role regarding its decay behavior, new possible relaxation processes emerge by changing from an isolated system to clusters of weakly bound particles. An example is the Intermolecular or -atomic Coulombic Decay (ICD), a non-local charge distribution process that recently gained attention due to its possible role in radiation damage in biological systems. In water clusters, ICD following inner valence ionization has already been observed experimentally. However, that is not the case for ICD following inner-shell ionization and subsequent Auger decay as theoretically predicted about 20 years ago.
We used a magnetic bottle type time-of-flight spectrometer to reveal different de-excitation pathways and to extract the characteristic electron signal. Three emitted electrons (expected to occur due to 1s-photoionization followed by Auger emission and subsequent Intermolecular Coulombic Decay) were detected in coincidence.