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    Inelastic collisions of CaH with He at cryogenic temperatures

    192475_192475.pdf (575.1Kb)
    Access Status
    Open access
    Authors
    Singh, V.
    Hardman, K.
    Lu, M.
    Ellis, Aja
    Morrison, M.
    Weinstein, J.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Singh, Vijay and Hardman, Kyle S. and Lu, Mei-Ju and Ellis, Aja and Morrison, Muir J. and Weinstein, Jonathan D. 2013. Inelastic collisions of CaH with He at cryogenic temperatures. Molecular Physics: An International Journal at the Interface Between Chemistry and Physics. 111 (12-13): pp. 1711-1715.
    Source Title
    Molecular Physics
    DOI
    10.1080/00268976.2013.772668
    ISSN
    0026-8976
    Remarks

    This is an Author's Accepted Manuscript of an article published in the Molecular Physics: An International Journal at the Interface Between Chemistry and Physics, (2013), copyright Taylor & Francis, available online at: <a href="http://www.tandfonline.com/">http://www.tandfonline.com/</a>. doi: 10.1080/00268976.2013.772668

    URI
    http://hdl.handle.net/20.500.11937/29030
    Collection
    • Curtin Research Publications
    Abstract

    Using helium buffer gas cooling, we have prepared dense samples of ground-state molecular calcium monohydride (CaH X 2Σ) at cryogenic temperatures. We have used optical pumping to polarise the spin state of the CaH molecules and we have measured the inelastic collisions of molecular CaH with atomic helium at temperatures from 2 to 7 K. The measured CaH electronic spin depolarisation rate coefficient increases rapidly with increasing temperature, increasing from 2 × 10−13 cm3 s−1 to over 10−11 cm3 s−1. The strong dependence of rate coefficient on temperature is attributed to the CaH population in the first excited rotational state.

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