Chemiluminescence and Dynamics of CN Produced by the Reactions of F and N Atoms with Halomethanes

The chemiluminescence produced by the reactions of F and N atoms with halomethanes CH_mX_4-m（X=Cl,Br,m≤4） was obtained in the visible region in crossed molecular beam apparatus operated in multi-collision condition. The spectra were assigned to CN（A²Ⅱ→X²∑^-） and CN（B²∑^-→X²∑^-） transitions. The CN（A²Ⅱ） was found to lie in highly excited vibrational states with a broad population distribution. A dynamics analysis proposed that the addition of F Atoms plays an important role in the formation of CN（A²Ⅱ,B²∑^-） and that CN（A²Ⅱ） is formed from an atom recombination process . CN（B²∑^-） is populated by energy transfer collision of CN（A²Ⅱ） with background molecules.