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实验获得了２４８ｎｍ激光光解ｎ－Ｃ_５Ｈ_（１１）Ｉ所产生的Ｉ和Ｉ碎片的飞行时间谱，从解离数据获得了解离碎片的平动能及内能分配情况，与过去碘代烷实验结果比较证明，随着烷基的增大，光解碎片的总平动能变小，烷基的内能增大。当烷基的分子量增大时，位能面交叉处的跃迁几率变大。
The time-of-flight spectra of I and I fragments generated by 248 nm laser photolysis of n-C_5H_ (11) I were obtained experimentally. The translational energy and internal energy distribution of the dissociated fragments were obtained from the dissociation data. It is proved by comparison that as the alkyl groups increase, the total kinetic energy of photolysis fragments becomes smaller and the internal energy of alkyl groups increases. When the molecular weight of alkyl increases, the probability of transition at the intersection of potential and energy surfaces becomes larger.