Abstract

An apparatus is described that allows angular distribution measurements of photo- and Auger electrons with high energy resolution. This apparatus is well suited to the investigation of inner-shell processes requiring photon energies from 100 to 1000 eV. Its proper functioning is tested by measuring the resonant Auger spectrum of argon, which is known for its unusually large anisotropy. Two preliminary results are presented for the asymmetry parameter of Ar3s photoelectrons at 244.4 eV photon energy (1.95±0.15) and of Ar2p photo-electrons at 450 eV photon energy (1.57 ± 0.15). Both values agree well with those from the literature.

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