中文摘要：

常温大气压下，在电子能量为0．35～0．65eV的范围内，使用氮气负电晕放电一电子吸附一离子迁移谱，测量了CH2Br２，CH２BrCl，CHBr3的电子吸附速率常数，得到电子吸附速率常数的大小关系为七（CH2Br2）〉南（CH2Brcl），七（CH2Br2）〉南（CHBr3），并根据电子亲和势对CH2Br2和CH2BrCl的大小关系进行理论分析。首次对CHBrs的电子吸附过程进行了定性分析，发现样品蒸汽在迁移区通入迁移管时，溴离子会与CHBr3分子络合成团簇离子Br-（H2O）ｎ（CHBr3）ｍ。

英文摘要：

Using atmospheric pressure nitrogen negative corona discharge electron attachment ion mobil- ity spectrometry, the rate constants of electron attachment to CH2Br2, CH2BrC1 and CHBrs were mea- sured at ambient temperature as a function of average electron energy in the range from 0.35 eV to 0.65 eV. The rate constants for electron attachment to CH2Br2, CH2BrC1, CHBr3 follow the relations of k（CI-I2Br2）〉k（CH2BrC1）, k（CH2Br2）〉k（CHBr3）, and the relations between CH2Br2 and CH2BrC1 are discussed in theory according to the electron affinity. In addition, the process of electron attachment toCHBr3 is firstly qualitative analyzed. It＇s found that when the sample vapor is introduced into the drift region, the bromine ion will cluster with the molecule of CHBr3 to be Br-（H20）n （CHBr3）m.