在570-620nm波长范围内用交叉束激光诱导荧光技术研究了F原子与C_2H_5I,C_2F_5I和C_3H_5I的反应,获得了反应产物IF的振功和转功激发谱;测得了反应产物IF在v=3,4和5能级中的初生相对振动布居密度,和部分的相对细致振动速率常数,转动温度和振功能级中转动能量的平均部分数;并对反应机制进行了讨论。 The reaction of F atoms with C_2H_5I, C_2F_5I and C_3H_5I was studied by using cross-beam laser-induced fluorescence in the wavelength range of 570-620nm, and the excitation and transfer excitation spectra of the reaction product IF were obtained. The reaction products IF were obtained at v = 3 , 4 and 5 energy levels in the relative density of relative population dynamics, and part of the relative fine vibrational rate constant, rotation temperature and vibrational level of energy in the average of the number of parts; and the reaction mechanism was discussed.