INFRARED SPECTRA OF HYDROGEN - RARE GAS VAN DER WAALS MOLECULES
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Date
1988
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Ohio State University
Abstract
Spectra of $H_{2}(D_{2})$- rare gas van der Waals molecules are being studied using long absorption paths (110-160 m) at low temperatures and a Bomem DA3.02 spectrometer. Among the Interesting results are: 1.) New spectra of $H_{2}-Ne$, obtained at about 25 K, are much cleaner and better resolved than previously available results. 2.) Spectra of $D_{2}-Ar$ accompanying the $Q_{1}(1)$ transition are observed for the first time. 3.) The first observed manifestation of the excited van der Waals stretching state (n=1) in this class of molecules is noted in the $Q_{1}(0)$ region of $H_{2}-Ar$. 4.) Excellent spectra of $H_{2}-Ar$ and $H_{2}-Kr$ in the $S_{0}(0) (350 cm^{-1})$ and $S_{0}(1) (590 cm^{-1})$ regions have been obtained. Detailed analysis of these results will result in improved 3-dimensional potential energy surfaces for the hydrogen-rare gas systems. Some new results on the $H_{2}-N_{2}$ and $H_{2}-C0$ molecules will also be presented.
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Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada