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Issue 16, 1997

Quantum yields for Cl(2P3/2,1/2), ClO and O(3P) in the photolysis of chlorine nitrate at 308 nm

Abstract

Quantum yields have been measured for chlorine nitrate photolysis at 308 nm using resonance fluorescence to detect Cl and O( 3 P). The addition of NO allowed ClO to be detected as Cl atoms. The quantum yields were determined to be: Cl 0.80±0.20, O( 3 P) ⩽0.05 and ClO 0.28±0.12. Approximately one third of the chlorine atoms are formed in the excited spin–orbit state Cl( 2 P 1/2 ). A large proportion of the ClO radicals were found to be formed in excited vibrational states which react more slowlywith NO than ground-state ClO, and are quenched slowly by N 2 . The yields of Cl and ClO were found to be independent of totalpressure up to 100 Torr. Rate coefficients were also measured for the reactions of chlorine nitrate with Cl atoms, k 3 =(9.1±1.2) ×10 -12 cm 3 molecule -1 s -1 and O atoms, k 4 =(2.4±0.4)×10 -13 cm 3 molecule -1 s -1 .

Article information


J. Chem. Soc., Faraday Trans., 1997,93, 2675-2682
Article type
Paper

Quantum yields for Cl(2P3/2,1/2), ClO and O(3P) in the photolysis of chlorine nitrate at 308 nm

G. S. Tyndall, C. S. Kegley-Owen, J. J. Orlando and J. G. Calvert, J. Chem. Soc., Faraday Trans., 1997, 93, 2675 DOI: 10.1039/A701585B

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