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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。
KI molecules were dissociated by pulsed laser beam. At the same time, another K + laser was used to excite neutral K atoms generated by dissociation of KI molecules, then the K atoms in the excited state were photoionized. The time-of-flight mass spectra of K + were analyzed, and the possible photon ionization (MPI) in photodissociation and photoionization were discussed.