TRANSFER AND STORAGE OF VIBRATIONAL ENERGY IN LIQUIDS: COLLISIONAL UP-PUMPING OF CARBON MONOXIDE ON LIQUID ARGON
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Date
1987
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Ohio State University
Abstract
Isotopically enriched carbon monoxide (88\% $^{13}C{^{16}}O, 12\% {^{13}}C{^{18}}O$) dissolved in liquid argon was optically pumped to the $v = 1$ level by a cw CO laser. This energy is redistributed by collisional up-pumping to higher vibrational levels. Fluorescence from vibrational levels up to $u = 37$ of the heavier isotope was observed from the steady-state distribution. A discontinuity in the fluorescence at $v = 28$ is observed which happens to be isoenergetic with the excited $a^{3}\Pi$ electronic state of CO. The $X^{1}\Sigma\to a^{3}\Pi$ intersystem crossing behavior and reactions which form isotopic carbon dioxide will be discussed.
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Author Institution: Department of Chemistry, Indiana University