Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 2: Attosecond Physics I (joint session A/MO)
A 2.7: Talk
Monday, March 11, 2024, 12:30–12:45, HS 1098
Interatomic Coulombic Decay from Auger final states in aqueous solution — •Andreas Hans1, Dana Bloß1, Rémi Dupuy2, Florian Trinter3, Uwe Hergenhahn3, Olle Björneholm4, and Arno Ehresmann1 — 1Universität Kassel und CINSaT, Kassel, Germany — 2Sorbonne Université, Paris, France — 3Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 4Uppsala University, Uppsala, Sweden
Interatomic Coulombic decay of resonant Auger final states (RA-ICD) has been discovered about a decade ago. Due to the site-selective character of the resonant excitation and the typically emitted slow electrons, RA-ICD has been envisioned to enhance the efficiency of radiation therapies. So far, the mechanism had only been observed experimentally in prototypical van der Waals dimers. Here, we present the transfer of the idea to the liquid phase. To this end we investigate the decay of 2p→ 3d resonantly excited solvated Ca2+ ions. We show, that using multi-electron coincidence spectroscopy increases the contrast for slow electrons drastically and that RA-ICD can be readily observed in the liquid phase.
Keywords: interatomic Coulombic decay; resonant Auger decay; aqueous solution; liquid microjet; coincidence techniques