摘要
在４７３～４８３ｎｍ波长范围内对碘乙烷分子共振增强多光子电离（ＲＥＭＰＩ）飞行时间（ＴＯＦ）质谱（ＭＳ）作了研究。分析结果表明在该波段碘乙烷（Ｃ２Ｈ５Ｉ）分子吸收双光子激光能量跃迁激发至Ａ带的３Ｅ，２Ａ１及１Ａ２态，激发态分子碎裂成中性碎片，中性碎片再吸收光子电离，产生了Ｃ２Ｈ＋５和Ｉ＋离子。Ｃ２Ｈ＋５离子进一步吸收光子并碎裂形成了碘乙烷分子ＲＥＭＰＩ－ＭＳ中其他的碎片离子。
The multiphoton ionization spectra of ethyl iodide are obtained by a time of flight mass spectrometer in the 473～483 nm region. It is found that parent molecules are firstly 2 photon resonantly excited to intermediate states of 3E, 2A 1 and 1A 2 in the A band, and then dissociated. C 2H + 5 and I + ions are produced by ionization of the neutral fragments. C 2H + 5 ions dissociate to a certain degree when absorbing photons further.
出处
《中国激光》
EI
CAS
CSCD
北大核心
1999年第2期176-180,共5页
Chinese Journal of Lasers
基金
国家自然科学基金
关键词
碘乙烷
飞行时间质谱
卤代烷烃
REMPI
ethyl iodide, multiphoton ionization, time of flight mass spectrum
