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- W2016235943 abstract "In a discharge flow study, N(4S) and O(3P) have been shown to quench and enhance the intensities of NO β chemiluminescence associated with their combination. Rate constants of ∼1.5 × 1010 1. mol–1 s–1 and (6.1 ± 0.6)× 1010 1. mol–1 s–1 are obtained for direct removal of NO(B2Π) by N and O atoms respectively.N is ∼80 times more efficient than N2 in removal of precursors of NO(B2Π)(v′= 0,1) and (15 ± 3) times for (v′= 2,3), suggesting that each pair of levels has a different common precursor. O removes precursors of (v′= O)(11 ± 4) times more efficiently than N2. These quenching effects on (v′= 0) emission are more and less pronounced in He and CO2 carriers respectively, when the much greater variations of the O atom effect indicate that N and O do not act on one precursor only.A considerable enhancement effect shows that O(3P) is ∼350 times more efficient than N2 at 296 K in inducing crossing into NO(B2Π)(v′= 2), strongly supporting NO(b4∑–) as the immediate precursor. Unlike the quenching effects above, this enhancement is temperature dependent; at 196 K O is ∼1400 times more effective than N2. Concurrent superimposed O atom quenching shows that collision induced crossing into NO(B2Π)(v′= 2) is a major depopulation route for the immediate precursor, which cannot be removed significantly by N atoms. CO2 is more efficient than N2 or He in inducing the crossing." @default.
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- W2016235943 title "Enhancement and quenching effects of N(4S) and O(3P) atoms on nitric oxide β emission. Part 1.—The major effects" @default.
- W2016235943 doi "https://doi.org/10.1039/dc9725300072" @default.
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