Optical Absorption and Thermoluminescence in Calcium Fluoride Doped with Manganese and Cerium

Abstract

Abstract Optical absorption curves of CaF2 singly doped with Mn or Ce, and doubly doped with both Mn and Ce, show complex arrays of absorption bands after irradiation. In the Mn-only doped samples the absorption can be clearly related to Mn, whereas various forms of Ce centre dominate the radiation-induced absorption in the Ce-doped samples. However, in the doubly doped speciments only the Ce related absorptions can be seen. From these observations, along with thermal and optical bleaching measurements, we suggest that the Mn-related centres are Mn/F centre complexes. These are believed to be the centres responsible for the TL in dosimetry grade CaF2:Mn. Possible mechanisms for the TL production process are discussed.