HIGH-RESOLUTION SPECTROSCOPY OF $SF_{6}$ USING A TUNABLE DIODE LASER
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Date
1970
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Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Using conventional infrared spectrometers, no fine structure is discernible in the $v_{3}$ band of $SF_{6}$ at $940 cm^{-1}$, even at the highest resolution. This makes a problem such as assigning the rotational levels of this molecule which are pumped by $CO_{2}$ laser radiation an exceedingly difficult one. The recent $development^{1-3}$ of the $Pb_{0, 88}$ $Sn_{0-12}Te$ laser, which emits radiation in the $940 cm^{-1}$ range, is tunable quasi-continuously over a $40 cm^{-1}$ range in 1-$2 cm^{-1}$ bands, and has an intrinsic linewidth of the order of $2\times 10^{-6}$ $cm^{-1}$, promises to enable a complete analysis of this band to be carried out. Portions of this band have been examined with the diode laser, and an exceedingly rich fine structure observed. These spectra will be shown and correlated with band contour calculations and estimates of second-order Coriolis splitting effects.
Description
This work has been supported in part by the Department of the Air Force, $^{1}$E. D. Hinkley, T. C. Harman, and C. Freed, Appl. Phys. Letters 18, 49 (1968). $^{2}$E. D. Hinkley and C. Freed, Phys. Rev. Letters 23, 277 (1969). $^{3}$E. D. Hinkley, Appl. Phys. Letters 16, 351 (1970).""
Author Institution: Lincoln Laboratory and Department of Chemistry, Massachusetts Institute of Technology
Author Institution: Lincoln Laboratory and Department of Chemistry, Massachusetts Institute of Technology