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本文利用质量分析离子动能谱（ＭＩＫＥＳ）和电子捕获诱导解离（ＥＣＩＤ）技术，研究了邻、间、对甲基苯酚分子在电子轰击质谱（ＥＩＭＳ）中产生的双电荷离子［Ｃ_７Ｈ_８Ｏ］~（２＋）和［Ｃ_７Ｈ_７Ｏ］~（２＋），根据测定电荷分离反应的动能释放值Ｔ和由此计算出的两电荷间距Ｒ，推测出过渡态的结构，双电荷离子的ＥＣＩＤ谱对三种异构体的区分提供了一定的信息。
In this paper, the mass spectra of double charged ions [C_7H_8O] ~ (H_2O_4) produced by electron impact mass spectrometry (EIMS) have been studied by mass spectrometry ion kinetic spectroscopy (MIKES) and electron capture induced dissociation (ECID) According to the determination of the kinetic energy release value T of the charge separation reaction and the two charge spacings R calculated therefrom, the structure of the transition state is deduced, and the ECID spectra of the doubly charged ions reflect the three kinds of isomerization Body distinction provides some information.