Volume 67, 1971

Studies of ground-state 2P[fraction three-over-two] halogen atoms using atomic resonance absorption

Abstract

Known concentrations of ground-state Br, Cl and I 2P[fraction three-over-two] atoms can be formed by the rapid stoichiometric reactions: [graphic omitted] k1, defined by –½[Br2]–1d ln[O]/dt, is reported as (8.7 ± 3.0)× 10–12 cm3 molecule–1 s–1 at 298 K. These reactions provide simple absolute calibrations for resonance line absorption intensities with Br, Cl and I 2P[fraction three-over-two] atoms in discharge-flow systems. Photolysis of Br2 and of ICl by H λ 121.6 nm radiation present in the atom resonance lamps leads to the formation of excited Br and I atoms. The effects of these phenomena on measurements of atom concentrations by resonance absorption are considered.

Article information

Article type
Paper

Trans. Faraday Soc., 1971,67, 2869-2885

Studies of ground-state 2P[fraction three-over-two] halogen atoms using atomic resonance absorption

M. A. A. Clyne and H. W. Cruse, Trans. Faraday Soc., 1971, 67, 2869 DOI: 10.1039/TF9716702869

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