Long-term fading study of the cooled optically stimulated luminescence in CaF2:Mn

Cooled optically stimulated luminescence (COSL) in CaF 2 :Mn has been recently demonstrated to be an interesting new dosimetric technique at the Pacific Northwest Laboratory (PNL). The COSL technique permits dosemeters to be re-read many times, annealed by either heat or light, and with a minimum detectable exposure of below 26 nC.kg −1 (100 μR). The present study was undertaken to determine the long-term fading characteristics of CaF 2 :Mn when analysed using the COSL dosimetry technique. Results of a one-year fading study have not revealed any measurable reduction in COSL intensity over the entire study period