PHOTO-DISSOCIATION OF HNCO AT 193 NM - NH(A 1DELTA) INTERNAL ENERGY-DISTRIBUTION AND REACTION-RATE WITH O2

An analysis of the primary photodissociation products resulting from the 193 nm photolysis of HNCO is reported. The major fragments are NH(a 1Δ, υ′ = 0) and CO(X 1Σ+). Reaction of NH(a 1Δ) with O2 and with HNCO produces only non-emissive products, A rapid E-E, V energy transfer occurs for collisions with O2. The time-resolved fluorescence rise of NH(X 3Σ-, υ′' = 0) resulting from NH(a 1Δ) collisions with O2 yields an energy transfer rate constant of 1.55 × 10-11 cm3 molecule-1 s-1. © 1979.