VIBRATION TO VIBRATION ENERGY TRANSFER IN $H_{2}$-ADDITIVE MIXTURES USING A STIMULATED RAMAN-IR FLUORESCENCE TECHNIQUE
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Date
1976
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Ohio State University
Abstract
We have studied rates of vibrational energy transfer in $H_{2}$-additive gas mixtures using a stimulated Raman-ir fluorescence technique. The doubled output of a $Nd^{+3}$:YAG laser focused through a high pressure cell of $H_{2}$ (at 5 atm) produced stimulated Stokes radiation. The laser and Stokes beams were then refocused into a second cell containing a low pressure $H_{2}$-additive gas mixture. A small percentage of $H_{2}$ ground state molecules were pumped to the $H_{2}(v = 1)$ level, thus allowing vibration to vibration energy transfer rates to be obtained by monitoring the rise and fall of the additive gas ir-fluorescence. The additive gas we have studied are HCl, DCl, DBr, $^{13}CO$, $^{12}CO$, NO, $CO_{2}$, and $N_{2}O$. The pressures of the additive gases studied ranged, from 0.4 to 200 Torr with $H_{2}$ pressures varying between 75 and 700 Torr. Results for some of the above mentioned gases mixtures will be presented in detail.
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Author Institution: Naval Research Laboratory