Radiation-induced valence changes in Eu-doped phosphors

Abstract

Europium impurities can be incorporated in two forms: divalent and trivalent. Phosphors activated by or find important applications. Exposure to ionizing radiations is known to cause conversion. This conversion is important in understanding thermoluminescence and radiophotoluminescence applications. However, there have been no systematic studies on conversion. Data on conversion in a large number of europium-doped phosphors are presented in this paper. It is concluded that efficient phosphors are suitable hosts for studying conversion.