Selective IR multiphoton dissociation of CF3I in a nonequilibrium pressure shock

The isotopically selective IR multiphoton dissociation of CF₃I is studied in a nonequilibrium pressure shock formed in the interaction of a pulsed gas-dynamically cooled molecular flow with a solid surface. The yield of a C₂F₆ product and its enrichment factor by the ¹³C isotope were measured experimentally. The time-of-flight spectra of CF₃I were obtained in the flow interacting with the surface and in an unperturbed flow. The spectral dependences of the yield of a C₂F₆ product in an unperturbed flow and in a pressure shock were studied along with the process selectivity. It was shown that the efficiency of isotopically selective molecule dissociation can be significantly increased due to the formation of a pressure shock. The origin of the results observed are discussed.