Abstract

Strong fluorescence from SO(B 3Σ − ( v′ = 2) → X 3Σ − ( v″ = n)) has been observed following KrF laser (248 nm) excitation of SO 2. The SO radicals are initially formed in their ground electronic state by a sequential two-photon absorption mechanism involving the B 1B 1 state of SO 2 as an intermediate state and a high-lying Rydberg state as the dissociative state. The SO radicals then absorb a further photon at 248 nm which gives rise to the observed SO(B-X) fluorescence.

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