cw CO2 laser-induced and SF6-sensitized decomposition of methyl iodide-d3

Abstract

The decomposition of CD3I initiated by the irradiation of a cw CO2 laser was studied in the presence of the SF6 sensitizer. The first reaction step of the decomposition produces CD3 radical that yields either methane-d4 (the abstraction reaction of „hot" radicals), or ethane-d6 (the recombination reaction of „cold" radicals). The effect of the total pressure and the composition of the reaction mixture, that of the laser excitation line and output and that of the irradiation time upon the decomposition rate and the product distribution was examined.