UNIGE document Scientific Article
previous document  unige:95400  next document
add to browser collection

Time-resolved x-ray absorption spectroscopy with a water window high-harmonic source

Pertot, Yoann
Matthews, Mary
Huppert, Martin
Svoboda, Vit
von Conta, Aaron
Tehlar, Andres
show hidden authors show all authors [1 - 11]
Published in Science. 2017, vol. 355, no. 6322, p. 264-267
Abstract Time-resolved X-ray absorption spectroscopy (TR-XAS) has so far practically been limited to large-scale facilities, to sub-picosecond temporal resolution and to the condensed phase. Here, we report the realization of TR-XAS with a temporal resolution in the low femtosecond range by developing a table-top high-harmonic source reaching up to 350 eV, thus partially covering the spectral region of 280 to 530 eV, where water is transmissive. We use this source to follow previously unexamined light-induced chemical reactions in the lowest electronic states of isolated CF+4 and SF+6molecules in the gas phase. By probing element-specific core-to-valence transitions at the carbon K-edge or the sulfur L-edges, we characterize their reaction paths and observe the effect of symmetry breaking through the splitting of absorption bands and Rydbergvalence mixing induced by the geometry changes.
Keywords Time-resolvedX-rayAbsorptionSpectroscopyTR-XASFemtosecondHigh-harmonicWater windowCF+4SF+6MoleculesCarbon K-edge
Full text
Research group Groupe Wolf
(ISO format)
PERTOT, Yoann et al. Time-resolved x-ray absorption spectroscopy with a water window high-harmonic source. In: Science, 2017, vol. 355, n° 6322, p. 264-267. https://archive-ouverte.unige.ch/unige:95400

29 hits



Deposited on : 2017-07-12

Export document
Format :
Citation style :