Study of elementary reactions by atomic resonance absorption with a non-reversed source. Part 1.—The reaction Cl + O3→ ClO + O2

Abstract

The rate constant k₁ for the reaction Cl ²P+ O₃→ ClO + O₂(1) has been measured over the temperature range 221–629 K. Atomic resonance absorption with a metastable Ar lamp, which emits non-reversed thermal Cl atom lines, was used to follow the pseudo first order decay of [Cl] in excess of O₃. The Arrhenius expression is given as log₁₀(k₁/cm³ molecule^–1 s^–1)=–(10.286 ± 0.039)–[(181 ± 12)/T]. Comparisons with other recent measurements are made.