Infrared saturation in sulfur hexafluoride

I. Burak, J. I. Steinfeld, D. G. Sutton

Research output: Contribution to journalArticlepeer-review


The saturation of absorption of a CW infrared laser beam by SF6 has been measured as a function of pressure of SF6 and added buffer gases (He, Kr, and C2H6). The results are interpreted by means of a four-state linear kinetic model for saturation of vibrational energy levels by intense infrared radiation, which predicts equalization of upper and lower level populations at power densities of approximately 10 W/cm2. Vibrational and rotational deactivation cross sections are derived from these data with the aid of this model, which suggests that previously observed pulse transparency effects may be interpreted in terms of this same model.

Original languageEnglish
Pages (from-to)959-980
Number of pages22
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Issue number7
StatePublished - Jul 1969
Externally publishedYes


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