Analysis of the ν4 (615 cm −1) region of the Fourier transform and diode laser spectra of SF 6

Abstract

A detailed analysis of the ν 4 fundamental band in SF 6 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.