A procedure for measuring photoelectron angular distributions from gas-phase targets using an angle- and energy-dispersive spectrometer

Angular distributions of the electrons emitted during photoionisation have been obtained using synchrotron radiation and a toroidal photoelectron spectrometer containing a position-sensitive detector. The distributions of the 2P1/2 and 2P3/2 states in krypton in the 24.8-25.3 eV photon energy range have been measured. A high statistical accuracy was maintained throughout that energy range by recording a pre-set number of counts - covering a wide range of emission angles - at each photon energy. The β parameters of the two states have been extracted. (Copyright (c) 1998 Elsevier Science B.V., Amsterdam. All rights reserved.)