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    Coherent Excitation of Ar 4s'[1/2] and 4s[3/2] by Low Energy Electrons


    Wang, S. and van der Burgt, Peter J.M. and Corr, J.J. and McConkey, J.W. and Madison, D. (1994) Coherent Excitation of Ar 4s'[1/2] and 4s[3/2] by Low Energy Electrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 27 (2). pp. 329-339. ISSN 0953-4075

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    Abstract

    Electron-photon coincidence measurements are reported of the excitation of the 4s'[1/2]10 state of Ar at incident energies of 20 and 30 eV and scattering angles up to 80 degrees . All values of the rho 00 parameter obtained are very small and not distinguishable from zero within experimental uncertainty. The level of agreement with available perturbative theories is quite good but significant discrepancies are noted at some angles particularly at the lower impact energy. Previous measurements from this laboratory of the 4s[3/2]10 state are reanalyzed in terms of the ratio of the exchange to direct excitation cross sections.

    Item Type: Article
    Keywords: Electron-photon coincidence measurements; Low Energy Electrons;
    Academic Unit: Faculty of Science and Engineering > Experimental Physics
    Item ID: 9810
    Identification Number: g/10.1088/0953-4075/27/2/010
    Depositing User: Dr Peter van der Burgt
    Date Deposited: 22 Aug 2018 14:56
    Journal or Publication Title: Journal of Physics B: Atomic, Molecular and Optical Physics
    Publisher: IOP Publishing
    Refereed: Yes
    URI:

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