Abstract

Mn-doped CaF₂ is a widely used material in γ-ray dosimetry where emission is observed as thermoluminescence (TL) during the readout of a dosimeter. However, these dosimeters are known for a background problem in which high-dose readings may occur before exposure to γ radiation. This problem seems to originate from a TL peak observed^1,2 at a higher temperature than the dosimetric peak. In a dosimetric-grade CaF₃ that is doped with 3% Mn⁺² Mn⁺²-Mn⁺² pairing takes place. This may be the cause of the deeper trap and hence the background problem. In this paper, we report time-resolved fluorescence of paired and single Mn⁺² m CaF₂ excited by 337-nm light from a nitrogen laser.

© 1992 Optical Society of America