Experimental study of the D + H₂ (<i>v</i> = 1) reaction by CARS spectroscopy

Abstract

Abstract The reactions D + H 2 ( v = 0, 1) → HD ( v = 0, 1) + H have been studiedin a discharge flow reactor by CARS‐spectroscopy. For H 2 ( v = 0) molecules a rate constant of (4, 0 ± 1, 0) 10 −16 cm 3 s −1 is obtained at 310 K from measured HD ( v = 0, 1) product yields. Keeping the degree of vibrational excitation of H 2 in the microwave discharge in the range of 1% from the increase of the HD ( v = 0, 1) CARS signals a rate of k 2a, b = (1, 0 ± 0, 4) 10 −13 cm 3 s −1 is derived. The total consumption of H 2 ( v = 1) in the presence of D atoms gives a rate k 2 = (1, 9 ± 0, 2) 10 −13 cm 3 s −1 at 310 K. The resultsare discussed in regard to previous measurements and theoretical treatments.