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Sequential two-photon photoexcitation of SO2 at 248 nm is found to lead to a number of primary fragments including S(3P) and SO(X 3Σ−). Further excitation of some of these photoproducts was also observed, occurring by both linear and two-quantum mechanisms. The resulting molecular X←B (v\,2) ultraviolet fluorescence from SO and the atomic 3P←3S vacuum ultraviolet emission from S atoms were detected and an analysis of the energy flow patterns was made.
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Wilson et al. (1982) studied this question.
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