Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 7: Poster: Spectroscopy
MO 7.12: Poster
Dienstag, 12. März 2024, 17:00–19:00, Tent C
Resonant double core hole spectroscopy of ultrafast decay dynamics in Fe complexes — •Julius Schwarz1, Matz Nissen1, Alberto De Fanis2, Aljoscha Rörig2, Karolin Baev5, Florian Trinter4, Tim Laarmann1,6, Nils Huse1, Philippe Wernet3, Michael Meyer2, Thomas Baumann2, Simon Dold2, Tommaso Mazza2, Yevheniy Ovcharenko2, Sergey Usenko2, Markus Ilchen1,2, Andreas Przystawik1,6, Hampus Wikmark3, and Michael Martins1 — 1Universität Hamburg, Germany — 2European XFEL, Hamburg, Germany — 3Uppsala University, Sweden — 4Fritz-Haber-Institut, Berlin, Germany — 5DESY, Hamburg, Germany — 6The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany
Resonant double core hole (DCH) spectroscopy allows for the observation of ultrafast dynamic processes in small 3d-metal compounds in the gas phase with enhanced sensitivity. Using the intense X-Ray pulses of the European XFEL, electron and ion spectroscopy was used to reveal the signature of iron 2p2 resonant DCH excitation in iron pentacarbonyl and ferrocene. Comparing the experimental results to theoretical calculations reconstructs single core hole (SCH) and DCH photon-matter interactions in the two targets. The DCH Auger-Meitner electron signals offer insight to the electron dynamics during the core hole lifetime and their dependence on the chemical environment. The product ions show evidence for DCH processes in multiply charged iron cations.