Temperature-dependent quantum yields for O(3P) and O(1D) production from photolysis of O3 at 248 nm
Literature Information
Edward J. Dunlea, J. Michael Nicovich
A pulsed laser photolysis–resonance fluorescence technique was employed independently by two laboratories to measure ΦO3P, the quantum yield for production of O(3P) from O3 photolysis at 248 nm, between 196 and 427 K. The agreement between the two studies is very good, and the combined results are adequately represented by the function ΦO3P= (0.115 ± 0.030) × exp((35 ± 60)/T) where the uncertainties are 2σ. Within experimental uncertainties, the new results are in agreement with previously reported room temperature results as well as with the single previous temperature dependence study, and greatly reduce the uncertainties in ΦO3P(T) and ΦO1D(T) (=1− ΦO3P(T)) especially at temperatures other than room temperature. The yield of O(3P) in the reaction of O(1D) with O3 is shown to be greater than unity at room temperature and below, and to increase slightly with decreasing temperature.
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