The visible chemiluminescence of the reaction F + CH3F

By using molecular beam apparatus the visible (450–900 nm) chemiluminescence of the reaction F + CH₃F was investigated. Seven vibronic bands of HCF (Ã₁A-XA') and four vibrational bands of HF ground state overtone transitions were obtained. The relative vibrational state distributions of HF (V'=4,5,6) states and the rotational temperature of HF (V'=3) state were obtained. The analyses show that the two kinds of spectra were caused by the secondary reaction F+CH₃F. The results may be helpful to explain the contradictory results of the experiments in F+CH₃F system.