Acetylacetone photodynamics at a seeded free-electron laser (CROSBI ID 252212)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Squibb, R. J. ; Sapunar, Marin ; Ponzi, A. ; Richter, R. ; Kivimäki, A. ; Plekan, O. ; Finetti, P. ; Sisourat, N. ; Zhaunerchyk, V. ; Marchenko, T. ; Journel, L. ; Guillemin, R. ; Cucini, R. ; Coreno, M. ; Grazioli, C. ; Di Fraia, M. ; Callegari, C. ; Prince, K. C. ; Decleva, P. ; Simon, M. ; Eland, J. H. D. ; Došlić, Nađa ; Feifel, R. ; Piancastelli, M. N.
engleski
Acetylacetone photodynamics at a seeded free-electron laser
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.
Acetylacetone ; photodynamics ; seeded free electron laser
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