Relative yield and rate constants for deactivation of electronically excited iodine atoms produced by methyl iodide photolysis

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Abstract
We have determined the fraction of iodine atoms produced in the electronically excited 2P1/2 state by broadband flash photolysis of methyl iodide. Rate constants for the deactivation of electronically excited iodine by methyl iodide and by methyl radicals have also been evaluated. In addition, an upper limit for the rate constant for the reaction of electronically excited iodine with methyl iodide to produce molecular iodine and methyl radicals has been determined. These measurements have been made by monitoring the gain of an iodine laser amplifier as a function of time.