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MO: Fachverband Molekülphysik
MO 6: Electronic Spectroscopy II
MO 6.9: Vortrag
Dienstag, 10. März 2020, 16:00–16:15, f102
Time-resolved soft x-ray photoelectron spectroscopy on 2-thiouracil at FLASH2 — •Dennis Mayer1, Jan Metje1, Fabiano Lever1, Axel Heuer1, Mario Niebuhr1, Matthew S. Robinson1, Skirmantas Alisauskas2, Francesca Calegari2, Stefan Duesterer2, Bastian Manschwetus2, Andrea Trabattoni2, Tommaso Mazza3, Raimund Feifel4, Richard Squibb4, Måns Wallner4, Thomas J. A. Wolf5, and Markus Gühr1 — 1University of Potsdam, Germany — 2Deutsches Elektronen-Synchrotron, Hamburg, Germany — 3European XFEL GmbH, Hamburg, Germany — 4University of Gothenburg, Sweden — 5Stanford PULSE Institute, Menlo Park, USA
Sulfur-substituted nucleobases show an interesting photophysical and photochemical behavior attributed to their efficient relaxation to long living triplet states [1,2].
We performed ultrafast UV pump - x-ray probe spectroscopy at the FLASH 2 free electron laser in Hamburg to monitor the ultrafast relaxation processes of 2-thiouracil into the triplet states. In this talk, we present delay-dependent core level photoelectron and Auger electron spectra taken at and close to the sulfur L-edges. We use the spectra to elucidate the dynamics from an element specific point of view.
We used the newly built URSA-PQ instrument, which is now open for users and compatible with beamlines at FLASH1 and FLASH2 in Hamburg.
[1] Arslancan et al. Molecules 22, 998 (2017)
[2] Ashwood et al. Photochem. Photobiol. 95, 33-58 (2019)