Abstract
Absorption by the Schumann—Runge B3Σu−←X3Σg− system of O2 was measured in order to identify the products of the O(1D)+O3 reaction. These products are found to be O3+O(1D)→ 2O(3P)+O2, O3+O(1D)→2O2† with k2a′≳10k2a′ ′. The O2† product is observed in states v′ ′≤ 30 and is apparently formed in all levels up to the dissociation limit. The formation and disappearance of vibrationally excited O2† are correlated with measurements of changes in ozone absorbance that are usually attributed to vibrational excitation. Under marginally isothermal and nonisothermal conditions ozone is excited to a nonequilibrium energy distribution, probably by vibration→vibration energy transfer from O2†. The rates of all processes having an activation energy are enhanced by this excitation.
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