Abstract
The quantum yield of the photolysis of ozone at λ = 2537 Å has been determined in the presence of water vapour, hydrogen, methane, hydrogen chloride and ammonia. In each case, the quantum yield determined was greater than that for pure ozone, and it is suggested that1Doxygen atoms formed in the primary photolytic step are able to react with the added gas to form a hydroxyl radical which is then able to propagate a chain reaction. A general kinetic scheme, consistent with the experimental findings, is presented, and the secondary reactions in the several cases are discussed.
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