Title :
Fading in CaF2(Tm/Dy) TL phosphors used in environmental radiation monitoring
Author :
Bacci, C. ; Draghi, V. ; Furetta, C. ; Rispoli, B.
Author_Institution :
Dept. of Phys., Rome Univ., Italy
fDate :
2/1/1989 12:00:00 AM
Abstract :
The TL (thermoluminescence) stability of CaF2:Dy (TLD-200) and CaF2:Tm (TLD-300) has been investigated over a maximum of 900 hours of storage. The experiments were carried out in different climatic conditions of storage: storage in dry air at 30, 40 and 46°C; and storage in humid conditions at 30°C and 80% RH, 40°C and 80% RH, and 46°C and 80% RH. Among other findings, it is shown that CaF2:Tm is suitable as an environmental dosimeter material because of its insensitivity to the ambient conditions
Keywords :
calcium compounds; dosimeters; environmental degradation; phosphors; thermoluminescence; thulium; 30 degC; 40 degC; 46 degC; 900 h; CaF2:Dy; CaF2:Tm; TL phosphors; TL stability; TLD-200; TLD-300; dry air; environmental dosimeter material; fading; humid conditions; Annealing; Detectors; Dosimetry; Electron traps; Fading; Humidity; Phosphors; Physics; Radiation monitoring; Temperature sensors;
Journal_Title :
Nuclear Science, IEEE Transactions on
