Picon, A.Lehmann, C. S.Bostedt, C.Rudenko, ArtemMarinelli, A.Osipov, T.Rolles, DanielBerrah, N.Bomme, C.Bucher, M.Doumy, G.Erk, B.Ferguson, K. R.Gorkhover, T.Ho, P. J.Kanter, E. P.Krassig, B.Krzywinski, J.Lutman, A. A.March, A. M.Moonshiram, D.Ray, D.Young, L.Pratt, S. T.Southworth, S. H.2017-04-102017-04-102016-05-23http://hdl.handle.net/2097/35348Citation: Picon, A., Lehmann, C. S., Bostedt, C., Rudenko, A., Marinelli, A., Osipov, T., . . . Southworth, S. H. (2016). Hetero-site-specific X-ray pump-probe spectroscopy for femtosecond intramolecular dynamics. Nature Communications, 7, 6. doi:10.1038/ncomms11652New capabilities at X-ray free-electron laser facilities allow the generation of two-colour femtosecond X-ray pulses, opening the possibility of performing ultrafast studies of X-ray-induced phenomena. Particularly, the experimental realization of hetero-site-specific X-ray-pump/X-ray-probe spectroscopy is of special interest, in which an X-ray pump pulse is absorbed at one site within a molecule and an X-ray probe pulse follows the X-ray-induced dynamics at another site within the same molecule. Here we show experimental evidence of a hetero-site pump-probe signal. By using two-colour 10-fs X-ray pulses, we are able to observe the femtosecond time dependence for the formation of F ions during the fragmentation of XeF2 molecules following X-ray absorption at the Xe site.Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)Radiation-DamageIonizationTimeScience & Technology - Other TopicsArticle