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利用飞行时间质谱仪研究了CH3I分子在440—510nm波段的多光子电离(MPI)机理.在该波段,CH3I分子吸收三光子激光能量与(5pπ,6p)里德伯态高频端发生共振,然后继续吸收光子电离解离成最终产物离子.The multiphoton ionization spectrum of methyl iodide is studied in the 440—510nm region.Three-photon is just resonant with the high-frequency tail of the (5pπ,6p) Rydberg state of methyl iodide.Then the excited methyl iodide continually absorbs another photon to be ionized and dissociated into fragment ions.
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