Erlangen 2018 – scientific programme
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MO: Fachverband Molekülphysik
MO 13: Posters 1: Ultrafast Spectroscopy
MO 13.20: Poster
Tuesday, March 6, 2018, 16:15–18:15, Orangerie
All-XUV transient-absorption spectroscopy on the ultrafast dissociation of small molecules — •Marc Rebholz1, Thomas Ding1, Lennart Aufleger1, Maximilian Hartmann1, Alexander Magunia1, David Wachs1, Kristina Meyer1, Veit Stooß1, Paul Birk1, Gergana Borisova1, Carina da Costa Castanheira1, Patrick Rupprecht1, Andrew Attar2, Zhi Heng Loh3, Thomas Gaumnitz4, Sebastian Roling5, Marco Butz5, Helmut Zacharias5, Stefan Düsterer6, Rolf Treusch6, Victor Despré7, Alexander Kuleff7, Christian Ott1, and Thomas Pfeifer1 — 1Max-Planck Institut für Kernphysik, Heidelberg, Germany — 2University of California Berkeley, Berkeley, USA — 3Nanyang Technological University Singapore, Singapore — 4Eidgenössische Technische Hochschule Zürich, Zürich, Switzerland — 5Westfälische Wilhelms-Universität Münster, Münster, Germany — 6Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany — 7Universität Heidelberg, Heidelberg, Germany
We present first results of a transient-absorption experiment using only extreme ultraviolet (XUV) light. The XUV laser pulses with photon energies near 50 eV and pulse durations of ∼ 50 fs are provided by the free-electron laser FLASH. This allows us to pump a core-electron transition (4d → σ*) in the target molecules methyl iodide (MEI) and diiodomethane (DIM) with high-intensity (estimated 1014 W/cm2) XUV light. We investigate the subsequent ultrafast dissociation by tracing changes in the absorption spectrum of an identical XUV probe pulse.