AN ANGLE-RESOLVING CYLINDRICAL MIRROR ANALYZER FOR MEASUREMENTS OF PHOTOELECTRONS AND AUGER ELECTRONS

An apparatus is described that allows angular distribution measurement s of photo- and Auger electrons with high energy resolution. This appa ratus is well suited to the investigation of inner-shell processes req uiring photon energies from 100 to 1000 eV. Its proper functioning is tested by measuring the resonant Auger spectrum of argon, which is kno wn for its unusually large anisotropy. Two preliminary results are pre sented for the asymmetry parameter of Ar3s photoelectrons at 244.4 eV photon energy (1.95 +/- 0.15) and of Ar2p photoelectrons at 450 eV pho ton energy (1.57 +/- 0.15). Both values agree well with those from the literature.