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    Université de Fribourg

    Dissociation of chloromethanes upon resonant σ* excitation studied by x-ray scattering

    Bohinc, R. ; Žitnik, M. ; Bučar, K. ; Kavčič, Matjaz ; Journel, L. ; Guillemin, R. ; Marchenko, T. ; Simon, M. ; Cao, Wei

    In: The Journal of Chemical Physics, 2014, vol. 139, no. 13, p. 134302

    The dissociation process following the Cl K-shell excitation to σ* resonances is studied by high resolution spectroscopy of resonant elastic and inelastic x-ray scattering on CH3Cl, CH2Cl2, CHCl3, and CCl4 molecules. Calculations employing the transition potential and Delta-Kohn-Sham DFT approach are in good agreement with the measured total fluorescence yield and show the presence of...

    Université de Fribourg

    Resonant inelastic x-ray scattering at the limit of subfemtosecond natural lifetime

    Marchenko, T. ; Journel, L. ; Marin, T. ; Guillemin, R. ; Carniato, S. ; Žitnik, M. ; Kavčič, Matjaz ; Bučar, K. ; Mihelič, A. ; Hoszowska, Joanna ; Cao, Wei ; Simon, M.

    In: The Journal of Chemical Physics, 2011, vol. 134, no. 14, p. 144308

    We present measurements of the resonant inelastic x-ray scattering (RIXS) spectra of the CH3I molecule in the hard-x-ray region near the iodine L2 and L3 absorption edges. We show that dispersive RIXS spectral features that were recognized as a fingerprint of dissociative molecular states can be interpreted in terms of ultrashort natural lifetime of ∼200 attoseconds in the case of the iodine...

    Université de Fribourg

    Separation of two-electron photoexcited atomic processes near the inner-shell threshold

    Kavčič, M. ; Žitnik, M. ; Bučar, K. ; Mihelič, A. ; Štuhec, M. ; Szlachetko, Jakub ; Cao, Wei ; Mori, R. Alonso ; Glatzel, P.

    In: Physical Review Letters, 2009, vol. 102, no. 14, p. 143001

    By means of a high resolution resonant inelastic x-ray scattering spectroscopy, we have for the first time separated spectral features pertaining to different two-electron atomic processes in the vicinity of an inner-shell threshold. Contributions of shakeoff, shakeup, and resonant 1s3p double excitations were extracted from the Ar KM-M2,3M...