碘化钾分子的光离解及生成物钾原子的共振电离研究

Study of Resonant Ionization of Atom K Produced by Photodissociation of Potassium Iodide Molecule

利用脉冲激光束对KI分子进行了光离解；同时，用另一束可调谐激光对KI分子离解后产生的中性钾原子进行共振激发，然后把处在激发态的钾原子进行光电离。对K＋的飞行时间质谱进行了分析，并对光离解及光电离过程中可能存在的多光子电离（MPI）进行了讨论。

In this paper,Postassium iodide molecule dissociated with pulse laser was report-ed,and then one of dissociated products, K,was ionized by using resonant ionization method. Byanalysing time of flight rnass spectra (TOFMS) of Potassium ion K+, the feature of K+ massspectra was studied and the possible multiphotoionization (MPI) process was discussed.