Anisotropic ultrafast dissociation probed by the Doppler effect in resonant photoemission from CF4.
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.
Ueda
K
K
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan. ueda@tagen.tohoku.ac.jp
Kitajima
M
M
De Fanis
A
A
Furuta
T
T
Shindo
H
H
Tanaka
H
H
Okada
K
K
Feifel
R
R
Sorensen
S L
SL
Yoshida
H
H
Senba
Y
Y