碱金属碘化物分子的光离解及碱金属原子的共振电离研究

Study of resonant ionization of Alkali metal atom produced by photodissociation of Alkali metal iodide molecule

利用脉冲激光束与分子的相互作用 ,对KI和CsI分子进行了光离解。同时 ,用另一束可调谐激光对离解后产生的中性碱金属原子K和Cs进行共振激发 ,然后把处在激发态的碱金属原子进行光电离。获得了碱金属离子的飞行时间质谱。另外 ,对光离解及光电离过程中可能存在的多光子电离 (MPI)

In this paper,Photodissociation of Alkali Metal Iodide Molecule,Such as KI and CsI,with pulse laser was reported,and then dissociated products,K and Cs,was ionized by using resonant ionizstion method.By analysing time of flight mass spectra (TOFMS) of Alkali Metal Atom ion,the feature of the ion mass spectra was studied and the possible multiphoto ionization (MPI) process was discussed.