Abstract

A velocity-variable highly intense pulsed supersonic CH (X 2Π) radical beam source was newly developed for the study on the collision energy dependent reaction dynamics of the state-selected CH radical. CH radicals were state-selected by an electrostatic hexapole field. The focusing curves and the CH flux intensities for the ∣ J, F i, M〉 states were measured by a saturated laser-induced fluorescence spectroscopy. As a demonstration, the rotational state dependence of the reaction cross section of CH + O 2 → OH(A) + CO reaction was determined at the collision energy of 0.06 eV.

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