A light source has been developed for photochemical studies which emits the 2062 A line of iodine. This lamp has been used to study reactions of CO excited in the a 3Π level. Carbon monoxide was irradiated in an experimental lamp incorporating an arrangement of concentric cylinders. The output of this lamp was 2 · 1018 quanta per second. The CO a3Π molecules react to form CO2 with a quantum efficiency between a few tenths and unity.
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Harteck et al. (1964) studied this question.