Reaction of O( 1 D ) with N 2 O

O( 1 D ), produced from the photolysis of N 2 O at 2139 Å, reacts with N 2 O in accord with:\documentclass{article}\pagestyle{empty}\begin{document} $$ \begin{array}{*{20}c} {(2)} & {{\rm O}(^1 D) + N_2 {\rm O} \to {\rm N}_2 + {\rm O}_2 } \\ \end{array} $$ \end{document}\documentclass{article}\pagestyle{empty}\begin{document} $$ \begin{array}{*{20}c} {(3)} & { \to 2{\rm NO}} \\ \end{array} $$ \end{document} We have used the method of chemical difference to obtain an accurate measure of k 2 / k 3 = 0.59 ± 0.01. Furthermore, the quantum yield of production of O( 3 P ), either on direct photolysis or on deactivation of O( 1 D ) by N 2 O, is less than 0.02 and probably zero.