title: Mass resolved MPI spectra of methyl iodide in the 430-490 nm region.
abstract: The mass resolved multiphoton ionization (MPI) spectra of methyl iodide were obtained in the 430-490 nm region using a time-of-flight (TOF) mass spectrometer. They have the same vibrational structure, which testifies that the fragment species, in the wavelength region under study, are from the photodissociation of multiphoton ionized molecular parent ions. Some features in the spectra are identified as three-photon excitations to 6p and 7s Rydberg states of methyl iodide. Two new vibrational structures of some Rydberg states are observed. The mechanism of ionization and dissociation is also discussed.
authors.affiliation: State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, People's Republic of China. blzhang@dicp.ac.cn
authors.forename: B
authors.initials: B
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Wang
authors.forename: N
authors.initials: N
authors.lastname: Lou
authors.forename: B
authors.initials: B
authors.lastname: Zhang
authors.forename: J
authors.initials: J
authors.lastname: Wei
mesh_terms: D006847:Hydrocarbons, Iodinated / Q000737:chemistry*; D007834:Lasers; D013058:Mass Spectrometry / Q000379:methods*; D017785:Photons; D014732:Vibration
chemical_list: D006847:Hydrocarbons, Iodinated; C014055:methyl iodide