title: Resonant inelastic x-ray scattering at the limit of subfemtosecond natural lifetime.
abstract: We present measurements of the resonant inelastic x-ray scattering (RIXS) spectra of the CH(3)I molecule in the hard-x-ray region near the iodine L(2) and L(3) 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 L-shell core-hole. Our results demonstrate the capacity of the RIXS technique to reveal subtle dynamical effects in molecules with sensitivity to nuclear rearrangement on a subfemtosecond time scale.
authors.affiliation: Laboratoire de Chimie Physique-Matière et Rayonnement, Université Pierre et Marie Curie, UMR 7614, 11 rue Pierre et Marie Curie, F-75231 Paris Cedex 05, France. tatiana.marchenko@upmc.fr
authors.forename: T
authors.initials: T
authors.lastname: Marchenko
authors.forename: L
authors.initials: L
authors.lastname: Journel
authors.forename: T
authors.initials: T
authors.lastname: Marin
authors.forename: R
authors.initials: R
authors.lastname: Guillemin
authors.forename: S
authors.initials: S
authors.lastname: Carniato
authors.forename: M
authors.initials: M
authors.lastname: Žitnik
authors.forename: M
authors.initials: M
authors.lastname: Kavčič
authors.forename: K
authors.initials: K
authors.lastname: Bučar
authors.forename: A
authors.initials: A
authors.lastname: Mihelič
authors.forename: J
authors.initials: J
authors.lastname: Hoszowska
authors.forename: W
authors.initials: W
authors.lastname: Cao
authors.forename: M
authors.initials: M
authors.lastname: Simon