ELECTRON-PHOTON COINCIDENCE EXPERIMENT AFTER POLARIZED-ELECTRON IMPACT ON XENON

Light-polarization measurments have been performed after polarized-ele ctron impact excitation of the xenon resonance levels. Both electron-p hoton coincidence experiments as well as measurements of the integrate d Stokes parameters have been carried out with a vacuum-ultraviolet an alyser of the reflection type. A complete set of integrated Stokes par ameters is given, which partly depend on the electron polarization and allow one to draw conclusions on spin effects involved in the scatter ing process. At a scattering energy of 25 eV and angles between 10-deg rees and 20-degrees a spin up-down symmetry was measured using the coi ncidence technique. A comparison of our experimental data with a DWBA calculation shows good agreement.