Gd3+and Tb3+luminescence quenching by the Auger effect in CdF2crystals

Abstract
The evidence of the free-electron Auger effect for the intra-impurity transitions 6P7/2 to 8S7/2 and 6I to 6P in Gd3+ and 5D4 to 7F in Tb3+ in conducting CdF2 crystals is presented.