ANALYSIS OF THE NU-4 (615 CM-1) REGION OF THE FOURIER-TRANSFORM AND DIODE-LASER SPECTRA OF SF6

A detailed analysis of the ν4 fundamental band in SF6 is presented. Both from the intermediate resolution (0.04 cm-1) FT-IR and high resolution (∼1 × 10-4 cm-1) diode laser measurements the frequencies of the rotational transitions as well as the fine splitting parameters of the individual rotational manifolds have been determined. Well-resolved rotational sublevels of several extremely high angular momentum states (J > 100) have been recorded using a kilometer optical path diode laser spectrometer, and the observed pattern of Coriolis substructures is shown to be in good agreement with the theory. © 1979.