Reaction dynamics study on multiple microscopic pathways of electronically excited O(1D) reaction

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The collision-energy controlled crossed molecular beam experiment by using different combination of carrier gases for two molecular beams has been established and applied to the O(1D) + methane reaction. In this method, evaluation of the collision energy between two beams is quite important. For this purpose, the velocity map ion imaging of the chemical species in the beams was utilized. New insights into the chemical reaction dynamics of two microscopic reaction pathways, namely, insertion and abstraction, were obtained from the observed collision energy dependence and isotope effects.