Selective infrared multiphoton dissociation of molecules in a gas-dynamic flow of small extension

Isotopically selective IR multiphoton dissociation of molecules (using CF3I by way of example) in a pulsed gas dynamic flow of small extension (the flow length in space being ≤ 1 cm) under conditions) when the flow was subjected to irradiation by high-intensity. IR laser radiation, was studied, the results are presented. The small extension flow permits attaining high values of dissociation yield of resonance excited molecules over the whole volume of the flow and, as a result, obtaining highly enriched residual gas after one irradiation cycle. The method described permits attaining approximately 400 - fold enrichment of residual gas by 13C isotope during irradiation of pulse molecular flow of CF3I featuring natural isotopic composition by solely one laser impulse. Dissociation yield actually equal to 1 was attained, whereas selectivity was α ≥ 10