Abstract

The first successful detailed analysis of the high-resolution (0.005 cm −1) IR spectrum of the v 4 band of CF 3CI ( $ ̃ v 0= 1216.75843(20) cm −1 for 35Cl) is reported on the basis of a measurement in a supersonic free jet. The rotational and vibrational cooling in the jet is evaluated from the spectra of v 1 and v 4 and their hot bands. Rotational temperatures are 32 ± 7 K and vibrational temperatures of the hot band ( v 1+ v 6)- v 6 about 240 ±30 K. The results are important in relation to IR laser chemistry and to modelling the absorption of freons in the atmospheric window.

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