State-to-state scattering of oriented OH

K.R.A.M. Schreel, J.J. Meulen, ter

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    51 Citations (Scopus)


    Hexapole state selection of OH molecules and subsequent orientation in an electric field is performed to study orientational effects in rotational excitation of OH in molecular collisions. Laser-induced fluorescence spectroscopy of OH is used to determine the orientational probability distribution function and to measure the cross sections for excitation. For the collisionally induced transitions of OH in the rotational ground state the steric asymmetry is determined for collisions with He, Ar, n-H2, and p-H2 (n = normal, p = para). The results show that for He excitation is preferential at the H-end of the molecule, whereas for Ar and H2 a preference for the O-end is shown in transitions to the lowest rotational states.
    Original languageEnglish
    Pages (from-to)7639-7647
    Number of pages9
    JournalJournal of Physical Chemistry A
    Issue number41
    Publication statusPublished - 1997


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