Photodissociation of H₂⁺: Vibrational trapping (VT) vs
dynamical dissociation quenching (DDQ) effect

Catherine Lefebvre

Département de chimie, Université Laval, Québec G1K 7P4 CANADA

In continuation of our studies of the Dynamical Dissociation Quenching (DDQ) effect, a control mechanism that relies on the synchronization of the molecular vibrational motion with the oscillations of the laser induced force field, we investigate the specific role played by this effect in the photodissociation of H2+ submitted to a UV-Vis field modulated by an IR periodic envelope. We illustrate how this effect works in conjunction with the usual Bond-softening (BS) and Vibrational Trapping (VT) processes associated with the molecular dressing by a UV- Vis field. We show that for a situation where the VT is certainly not operational, a DDQ-type effect can quench the dissociation, i.e. cause a molecular trapping.