Diode-laser radiation absorption of CF2Cl2 around 921 cm−1 in a supersonic jet

With a diode laser we have studied the spectral region around 921 cm^–1 of the CF₂Cl₂ molecule cooled in a free jet. Accurate studies of the intensity of two vibrorotational bands have enabled us to determine their assignment. In addition, the rotational structure has been partially resolved, and approximate fitting parameters have been deduced. The simultaneous use of a diode laser and a free jet has proved to be useful in correctly identifying the origin of the absorption bands.