Time-resolved soft X-ray absorption spectroscopy in transmission mode on liquids at MHz repetition rates

We present a setup combining a liquid flatjet sample delivery and a MHz laser system for time-resolved soft X-ray absorption measurements of liquid samples at the high brilliance undulator beamline UE52-SGM at Bessy II yielding unprecedented statistics in this spectral range. We demonstrate that the efficient detection of transient absorption changes in transmission mode enables the identification of photoexcited species in dilute samples. With iron(II)-trisbipyridine in aqueous solution as a benchmark system, we present absorption measurements at various edges in the soft X-ray regime. In combination with the wavelength tunability of the laser system, the set-up opens up opportunities to study the photochemistry of many systems at low concentrations, relevant to materials sciences, chemistry, and biology. (C) 2017 Author(s).

Metadaten
Author details:	Mattis Fondell ORCiD, Sebastian Eckert ORCiD GND, Raphael Martin Jay ORCiD GND, Christian Weniger, Wilson Quevedo, Johannes Niskanen, Brian Kennedy, Florian Sorgenfrei ORCiD GND, Daniel Schick, Erika Giangrisostomi, Ruslan Ovsyannikov, Katrin Adamczyk ORCiD GND, Nils Huse ORCiD, Philippe Wernet, Rolf Mitzner ORCiD GND, Alexander Föhlisch ORCiD GND
DOI:	https://doi.org/10.1063/1.4993755
ISSN:	2329-7778
Pubmed ID:	https://pubmed.ncbi.nlm.nih.gov/28852689
Title of parent work (English):	Structural dynamics
Publisher:	American Institute of Physics
Place of publishing:	Melville
Publication type:	Article
Language:	English
Year of first publication:	2017
Publication year:	2017
Release date:	2020/04/20
Volume:	4
Number of pages:	11
Funding institution:	Helmholtz Association via the Helmholtz Postdoc Programme [PD-142]; ERC-ADG under Horizon EU Framework Programme for Research and Innovation [669531 EDAX]
Organizational units:	Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer review:	Referiert