Vibronic coupling of short-lived electronic states

The interaction of short-lived electronic states through the nuclear motion is investigated. Particular attention is paid to the impact of this interaction on differential and integrated cross sections for resonant electron--molecule scattering. A vibronic coupling model which has been successfully applied to study vibronic interactions in bound electronic states is extended to resonance states. Calculations of the nuclear dynamics in the nonlocal potential of the coupled resonance states are presented and discussed for several examples including up to two vibrational modes