Investigation of Spin-Orbit Effects in the Excitation of Noble Gases by Spin-Polarized Electrons
We have measured the integrated Stokes parameters of the light emitted following the impact excitation by polarized electrons of the np5 (n+1)p[5/2]3 states in Ne (n=2), Ar (n=3), Kr (n=4), Xe (n=5), and the np5 (n+1)p[5/2]2 state in Kr. The near-threshold linear-polarization fractions 1 were consistent with zero for all of the J=3 states measured, providing no evidence of Mott scattering. For J=2 excitation, 1 shows the clear influence of the intermediately coupled nature of the state. At threshold, the measured circular polarization 2 and linear polarization 3 for the J=3 states agree well with the LS-coupled threshold predictions. These results provide the basis for optical measurements of electron polarization.
J. E. Fürst et al., "Investigation of Spin-Orbit Effects in the Excitation of Noble Gases by Spin-Polarized Electrons," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 47, no. 5, pp. 3775-3787, American Physical Society (APS), May 1993.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevA.47.3775
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