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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...