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用分子束和飞行时间技术测量了248nm激光光解过程C_2H_5I→C_2H_5+I°(~2p_(1/2))和C_2H_5I→C_2H_5+I(~2p_(3/2))裂解碎片的平动能和内能分布。测得通道比I~*/I为2.37。根据实验结果,对光解过程中电子激发态特性,产生I(~2p_(3/2))通道的机理以及乙基自由基的振动激发作了讨论。
The kinetic energy of 248 L laser photolysis was measured by molecular beam and time-of-flight technique and the translational energy of the cleaved fragments of C_2H_5I → C_2H_5 + I ° (~ 2p_ (1/2)) and C_2H_5I → C_2H_5 + I (~2p_ (3/2) Internal distribution. Measured channel ratio I ~ * / I is 2.37. According to the experimental results, the mechanism of I (~ 2p_ (3/2)) channels and the vibrational excitation of ethyl radicals during photolysis are discussed.