Precipitation-induced photostimulated luminescence in CsBr:Eu2+

This article concerns the unusual storage mechanism in the x-ray storage phosphor CsBr:Eu2+. Data are presented and discussed regarding the identification of x-ray diffraction patterns and the photostimulated luminescence (PSL) intensity as a function of the annealing temperature for various Eu concentrations of CsBr:Eu2+ powder crystals and the spatial correlation of trapped electrons and holes. These results together with an analysis of previous literature data enable us to propose a model explaining the formation of phases which are active in the PSL-process of the CsBr:Eu2+ storage phosphor. (C) 2003 American Institute of Physics.