Rate coefficients for O(1D) + H2, D2, HD reactions and H atom yield in O(1D) + HD reaction

Rate coefficients, in units of 10−10 cm3 molecule−1 s−1, for the O(1D) reactions with H2, D2 and HD at 298 K were determined to be 1.2 ± 0.1, 1.1 ± 0.1, and 1.2 ± 0.1, respectively. The H atom yield in the O(1D) + HD reaction, relative to that in the O(1D) + H2 reaction, was measured to be 0.57 ± 0.03. The temporal profiles of O(3P) and H(2S), following pulsed photolytic generation of O(1D), were measured using cw resonance fluorescence detection to determine the rate coefficients and product yield.