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Acetylacetone photodynamics at a seeded free-electron laser
Univ Gothenburg, Dept Phys, Origovagen 6B, SE-41296 Gothenburg, Sweden..
Inst Ruder Boskov, Bijenicka Cesta 54, Zagreb 10000, Croatia..
Inst Ruder Boskov, Bijenicka Cesta 54, Zagreb 10000, Croatia..
Elettra Sincrotrone Trieste, Str Statale 14 Km 163-5, I-34149 Trieste, Italy..
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2018 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, article id 63Article in journal (Refereed) Published
Abstract [en]

The first steps in photochemical processes, such as photosynthesis or animal vision, involve changes in electronic and geometric structure on extremely short time scales. Time-resolved photoelectron spectroscopy is a natural way to measure such changes, but has been hindered hitherto by limitations of available pulsed light sources in the vacuum-ultraviolet and soft Xray spectral region, which have insufficient resolution in time and energy simultaneously. The unique combination of intensity, energy resolution, and femtosecond pulse duration of the FERMI-seeded free-electron laser can now provide exceptionally detailed information on photoexcitation-deexcitation and fragmentation in pump-probe experiments on the 50-femtosecond time scale. For the prototypical system acetylacetone we report here electron spectra measured as a function of time delay with enough spectral and time resolution to follow several photoexcited species through well-characterized individual steps, interpreted using state-of-the-art static and dynamics calculations. These results open the way for investigations of photochemical processes in unprecedented detail.

Place, publisher, year, edition, pages
2018. Vol. 9, article id 63
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Physical Sciences
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URN: urn:nbn:se:uu:diva-341497DOI: 10.1038/s41467-017-02478-0ISI: 000419404200013PubMedID: 29302026OAI: oai:DiVA.org:uu-341497DiVA, id: diva2:1183814
Available from: 2018-02-19 Created: 2018-02-19 Last updated: 2018-02-19Bibliographically approved

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Piancastelli, Maria Novella

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