Hannover 2016 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 17: Electronic Spectroscopy 2
MO 17.5: Vortrag
Donnerstag, 3. März 2016, 15:30–15:45, f102
A Flatjet System for Soft X-Ray Spectroscopy in the Liquid Phase — •Maria Ekimova1, Wilson Quevedo2, Manfred Faubel3, Philippe Wernet2, and Erik Nibbering1 — 1Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany — 2Institute for Methods and Instrumentation for Synchrotron Radiation Research, HZB, Berlin, Germany — 3Max Planck Institute for Dynamics and Self-Organization, Goettingen, Germany
Recent progress in soft-X-ray absorption spectroscopy (XAS) has led to new insights into the local molecular interactions in liquid water, alcohols and in solutions. The methods used to measure XAS typically involve either standing sample cells with silicon nitride(Si3N4) membranes or single liquid jets. Signal contribution of the Si3N4 membrane, or possible radiation damage may complicate the sample cell approach. Single liquid jets on the other hand have limited diameter, preventing a proper XAS measurement in transmission mode. Here, we present [1] a *free-windows* flatjet system as a new approach to perform solution-phase soft X-ray spectroscopy directly in transmission mode. The collision of two single jets with a diameter of 50 um under an impact angle of 48° leads to double sheet formation, of which the first sheet is 6 mm long, 1 mm wide and with a thickness of 1,4-3 um. We demonstrate the feasibility of N and O K-edge transmission XAS of salt solutions. Our results pave the way of using liquid flatjets both in steady-state and ultrafast soft X-ray spectroscopy.
References:
[1] M. Ekimova et al., Struct.Dyn. 2, 054301 (2015)