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

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 k_O–HF=3.1±0.6×10⁻¹², k_Cl–HF=7.4±1.6×10⁻¹³, k_F–HF=2.8±0.6×10⁻¹³; for DF(v=1) they are k_O–DF=7.8±2.2×10⁻¹², k_Cl–DF=2.0±0.3×10⁻¹², k_F–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.