TUNABLE DIODE LASER SPECTROSCOPY OF $CH_{3}F$ IN AN EQUILIBRIUM CELL MAINTAINED AT 7.5 KELVINS
Loading...
Date
1994
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
We report the infrared measurement of rotational and translational temperatures for $CH_{3}F$ in the gas phase with a temperature of 16 Kelvins. This is accomplished by extending the collisional cooling technique originally developed for the microwave spectral $region^{1}$ to the infrared. We measured an RQ(J,0) feature centered at approximately 1475 wavenumbers (in $cm^{-1}$) in the V2 and V5 bands of $CH_{3}F$. The rotational temperature was determined by measuring relative intensities of low J transitions and comparing these results to those predicted by the rotational partition function. We utilized measurements of the absorption line width to calculate the translational temperature.
Description
1. D.R. Willey, R.L. Crownover, D.N. Bittner and F.C. De Lucia, J. Chem. Phys. 89, 1923 (1988).
Author Institution: Department of Physics, Allegheny College; Department of Physics and Astronomy, Franklin and Marshall College
Author Institution: Department of Physics, Allegheny College; Department of Physics and Astronomy, Franklin and Marshall College