Is there a light collision partner effect in vibrational energy transfer? Relaxation of p-difluorobenzene by He and Ar

Mudjijono, Warren D. Lawrence

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    8 Citations (Scopus)

    Abstract

    State-to-state branching ratios are reported for vibrational energy transfer (VET) from the 302 and 82 vibrational levels in S1 (1B2u) p-difluorobenzene by the collision partners He and Ar in the collision region of a supersonic free-jet expansion. For VET from the 82 level, He removes more energy than does Ar. This is the expected light collision partner effect. For the 302 level, however, Ar unexpectedly removes more energy than He. The opposing behaviour observed for relaxation by He and Ar from two vibrational levels of the same molecule is inconsistent with a universal 'light collision partner effect'.

    Original languageEnglish
    Pages (from-to)173-180
    Number of pages8
    JournalChemical Physics Letters
    Volume223
    Issue number3
    DOIs
    Publication statusPublished - 17 Jun 1994

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