The deactivation of HF(v=1) and DF(v=1) by O, Cl, and F atoms

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Abstract
The relaxation of vibrationally excited HF and DF by O, Cl, and F atoms at T=300 °K has been measured by the laser induced fluorescence method. The rate constants in units of cm3 molecule−1⋅sec−1 for HF(v=1) are kO–HF=3.1±0.6×10−12, kCl–HF=7.4±1.6×10−13, kF–HF=2.8±0.6×10−13; for DF(v=1) they are kO–DF=7.8±2.2×10−12, kCl–DF=2.0±0.3×10−12, kF–DF=6.5±1.2×10−13. The results provide further evidence for the validity of a vibronic to translational energy transfer mechanism. Atom transfer reactions are shown to be of no importance.