【摘要】 在交叉分子束装置上,进行了F和N原子同时与卤代甲烷CH_mX_4-m（X=Cl,Br,m≤4）反应的化学发光实验研究,得到可见及紫外波段内较强的CN（A²Ⅱ→X²∑^-）和CN（B²∑^-→X²∑^-）发射光谱,其中CN（A²Ⅱ）态具有较高的振动激发.分析反应机理后认为:F原子的存在对CN（A²Ⅱ,B²∑^-）的形成起着重要的作用,高振动激发态CN（A²Ⅱ）产生于基态N原子与CF的原子重排反应,CN（B²∑^-）则由CX（A²Ⅱ）与背景分子的碰撞传能产生.更多还原

【Abstract】 The chemiluminescence produced by the reactions of F and N atoms with halomethanes CHmX4-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 (B2∑+ →X2∑-) and CN (A2∏→X2∑-) transitions. The (A2∏) 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(A2∏,B2∑-) and that CN(A2∏) is formed from an atom recombination process . CN (B2∑+ ) is populated by energy transfer collision of CN(A2∏) with background molecules.更多还原