title: Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF4.
abstract: The resonant Auger spectrum from the decay of F 1s-excited CF4 is measured. Several lines exhibit a nondispersive kinetic energy as the exciting photon energy is tuned through the resonance region. The F 1s(-1) atomiclike Auger line is split into two components due to the emission of Auger electrons by a fragment in motion, when electron emission is observed along the polarization vector of the light. This Doppler splitting is direct evidence that the core excitation leads to T(d)-->C(3v) symmetry lowering, by elongation of a specific C-F bond preferentially aligned along the polarization vector of the incident photon.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan. ueda@tagen.tohoku.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Ueda
authors.forename: M
authors.initials: M
authors.lastname: Kitajima
authors.forename: A
authors.initials: A
authors.lastname: De Fanis
authors.forename: T
authors.initials: T
authors.lastname: Furuta
authors.forename: H
authors.initials: H
authors.lastname: Shindo
authors.forename: H
authors.initials: H
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Okada
authors.forename: R
authors.initials: R
authors.lastname: Feifel
authors.forename: S L
authors.initials: SL
authors.lastname: Sorensen
authors.forename: H
authors.initials: H
authors.lastname: Yoshida
authors.forename: Y
authors.initials: Y
authors.lastname: Senba