Premium
Thermoluminescent properties of some phosphor glasses based on aluminum oxide
Author(s) -
El Mesady I.,
Khaled N.,
Hussein A.,
El Samman H.,
Alawsh S.
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3125
Subject(s) - thermoluminescence , reproducibility , repeatability , materials science , analytical chemistry (journal) , phosphor , dosimeter , figure of merit , doping , aluminum oxide , oxide , luminescence , thermoluminescent dosimetry , aluminium , nuclear chemistry , thermoluminescent dosimeter , chemistry , nuclear medicine , dosimetry , composite material , optoelectronics , metallurgy , medicine , chromatography
The transparent thermoluminescent aluminum oxide‐based glass of 15Al 2 O 3 –35P 2 O 5 –25CaO–25Na 2 CO 3 , abbreviated as APCN (all in mol%) doped with different concentrations of SiO 2 from 0.0–500 ppm was prepared using a conventional melt‐quenching technique. The TL sensitivities of the prepared glasses were investigated at 3 Gy γ‐dose using a 60 Co source and measured at a heating rate 10 C/sec. The highest TL intensity of the material doped with SiO 2 was found at a concentration of 500 ppm (APCNSi 5 ). Deconvolution of the glow curve from APCNSi 5 resulted in four peaks at about 161, 194, 237 and 293 C with a Figure Of Merit (FOM) of 1.28%. The APCNSi 5 specimen had the best dosimetric properties when compared with the other samples. Reproducibility, repeatability, dose–response curve and fading effect were checked for peak 3, which appeared at about 237 C. The results displayed that the APCNSi 5 glass system was a low‐Z material (Z eff ≈ 10), and had good reproducibility and good repeatability. Peak 3 showed good linearity over a dose range up to 20 Gy (R 2 = 0.999) and sublinearity behaviour was found. The signal from APCNSi 5 faded by about 11% after 2 days post irradiation, therefore it showed almost no significant loss. Such properties make the newly prepared glasses suitable for and highly recommended for use in γ‐dosimeters. Copyright © 2016 John Wiley & Sons, Ltd.