TEA CO2 laser-induced isotopically selective dissociation of SF6 in a coldshock wave

When a pulsed gas dynamically cooled supersonic molecular flow interacts wi th solid surface a cold shock wave is formed in front of it, non-equilibriu m conditions in which may be 'reverse' to those in the incident (unperturbe d) flow. Isotopically selective infrared multiphoton dissociation of SF, in the cold shock wave was studied. Anomalously a large increase (more than o ne order of magnitude) of the yield of products was found, as compared with the case of excitation of SF, in unperturbed flow, without essential decre ase of the selectivity of process. (C) 2000 Elsevier Science B.V. All right s reserved.