Abstract

Millimeter-wave spectroscopic techniques have been used to study the effects of buffer gases (helium and hexane) on the ¹³CH₃F optically pumped far-infrared laser. The continuous tunability over a wide spectral region and absolute frequency reference of this technique, coupled with the accurately known rotational transition moments, have made possible a number of new measurements and calculations. In this work the diagnostic probe was coprop-agated with the CO₂-laser pump beam through the ¹³CH₃F. The model that we have previously described, which distinguishes among different kinds of rotational transitions, also accounted for these new experimental results. Also reported in this paper are the results of a spectroscopic study of ¹³CH₃F in its ground and υ₃ = 1 excited vibrational states.

© 1985 Optical Society of America

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