# VIBRATIONAL ENERGY TRANSFER OF CO BY $CH_{4}, CD_{4},$ AND $CF_{4}$ IN LIQUID Ar

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 Title: VIBRATIONAL ENERGY TRANSFER OF CO BY $CH_{4}, CD_{4},$ AND $CF_{4}$ IN LIQUID Ar Creators: Abdel-Halim, H. M.; Ewing, George E. Issue Date: 1983 Abstract: The rate constant for the vibrational relaxation of CO(v=1) by $CH_{4}, CD_{4},$ and $CF_{4}$ were measured in liquid Ar. A comparison has been made with the gas phase results measured at the same $temperature^{1}$, Which enables us to test the validity of the Isolated Binary Collision (IBC) model. A blackbody source was used to excite CO to the $v=1$ level. The fluorescence emission from which the excited CO was used to monitor the transfer of vibrational energy in the system. Several concentrations of CO and its collision partner were studied, from the rate constant could be extracted. Our results show that the liquid phase rate constant ($k_{l}$) is almost equal to the gas phase one $(k_{g})$, where the IBC model predicts $k^{1}$ to be several times larger than $k_{g}$. However, within an order of magnitude accuracy the IBC model is still valuable."" $^{1}$ J.M. Jackson, P.A. Lewis, M.P. Skirrow, and C.J.S.M. Simpson, Trans. Faraday Soc. II, 75, (1979) 1341. URI: http://hdl.handle.net/1811/12052 Other Identifiers: 1983-WH-06