Infrared multiphoton dissociation of¹³CF₃Cl induced by CO₂ laser pulses

Selective infrared multiphoton dissociation of¹³CF₃Cl induced by CO₂ laser pulses adjusted on {Mathematical expression} = 1071.9 cm^-1 has been studied in the energy range E between 0.5 and 2 J per laser pulse or fluence range between 5 and 25 J per cm², and in the pressure range between 0.10 and 60 Torr. The effect of these parameters on the isotopic selectivity of the dissociation gives information on the rotational relaxation constants. As for the dissociation probabilities, they vary exponentially with E^-1. The applicability of such an Arrhenius-type relation is discussed and semi-quantitatively justified.