A-band methyl halide dissociation via electronic curve crossing as studied by electron energy loss spectroscopy

H Kato, H Masui, M Hoshino, H Cho, O Ingolfsson, Michael Brunger, P Limao-Vieira, H Tanaka

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    14 Citations (Scopus)

    Abstract

    Excitation of the A -band low-lying electronic states in the methyl halides, CH 3 I, CH 3 Br, CH 3 Cl, and CH 3 F, has been investigated for the (n→ σ * ) transitions, using electron energy loss spectroscopy (EELS) in the range of 3.5-7.5 eV. For the methyl halides, CH 3 I, CH 3 Br, and CH 3 Cl, three components of the Q complex ( 3 Q 1 , 3 Q 0 , and 1 Q 1 ) were directly observed, with the exception of methyl fluoride, in the optically forbidden EELS experimental conditions of this investigation. The effect of electronic-state curve crossing emerged in the transition probabilities for the 3 Q 0 and 1 Q 1 states, with spin-orbit splitting observed and quantified against results from recent ab initio studies.

    Original languageEnglish
    Article number054304
    Pages (from-to)054304-1-054304-7
    Number of pages7
    JournalJournal of Chemical Physics
    Volume133
    Issue number5
    DOIs
    Publication statusPublished - 7 Aug 2010

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