title: X-ray absorption measured in the resonant Auger scattering mode.
abstract: We report both experimental and theoretical studies on x-ray absorption measured in the resonant Auger scattering mode of gas phase carbon monoxide near the O1s-->2pi region. Both experiment and theory display a crucial difference between the x-ray absorption profiles obtained in the conventional and resonant scattering modes. Lifetime vibrational interference is the main source of the difference. It is demonstrated that such interference, which arises from a coherent excitation to overlapping intermediate levels, ruins the idea for obtaining x-ray absorption spectra in a lifetime broadening free regime.
authors.affiliation: UVSOR Facility, Institute for Molecular Science, Okazaki 444-8585, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hikosaka
authors.forename: Y
authors.initials: Y
authors.lastname: Velkov
authors.forename: E
authors.initials: E
authors.lastname: Shigemasa
authors.forename: T
authors.initials: T
authors.lastname: Kaneyasu
authors.forename: Y
authors.initials: Y
authors.lastname: Tamenori
authors.forename: J
authors.initials: J
authors.lastname: Liu
authors.forename: F
authors.initials: F
authors.lastname: Gel'mukhanov