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  • Angular distribution of the fluorescence of helium doubly photo-excited statesconverging on the He[sup]+ (N=2) ionization treshold
    Lambourne, J. G. ...
    Abstract. The asymmetry parameter for fluorescence photons emitted during theradiative decay of the sp2,n+(1Po), sp2,n-(1Po), 2pnd(1Po) and 2pnd(3Do) series of helium doubly excited states, formed by ... the absorption of linearly polarized synchrotron radiation, has been measured. The results are compared with recent theoretical calculations (Zitnik et al 2002 Phys. Rev. A 65 032520). At high n the parameter is shown to increase and oscillate due to the excitation of triplet states, optically accessible from the helium ground state due to spinÉorbit effects.
    Source: Journal of physics. B, Atomic, molecular and optical physics. - ISSN 0953-4075 (Vol. 36, 2003, str. 4351-4359)
    Type of material - article, component part
    Publish date - 2003
    Language - english
    COBISS.SI-ID - 17885223

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