RELATIVISTIC EFFECTS ON ANGULAR-DISTRIBUTION OF AUGER ELECTRONS EMITTED FROM BE-LIKE IONS FOLLOWING ELECTRON-IMPACT EXCITATION

We have calculated the angular distribution functions for Auger electr ons emitted from Be-like Mg, Fe, and Mo following 1s-2p excitation by electron impact. The calculations were carried out in intermediate cou pling with configuration interaction using the relativistic distorted- wave and multiconfiguration Dirac-Fock methods. We found strong angula r asymmetry for many transitions. We also found that relativistic effe cts can completely change the characteristics of the angular distribut ion for transitions which have many contributing partial waves, even f or ions as light as Fe.