Thermoluminescent properties of some phosphor glasses based on aluminum oxide. (14th March 2016)

• Record Type: Journal Article
• Authors: El Mesady, I.; Khaled, N.; Hussein, A.; El Samman, H.; Alawsh, S.
• Is Part Of: Luminescence. Volume 31:Number 8(2016)
• Page Start: 1433
• Page End: 1437
• Publication Date: 2016-03-14
• Subjects: aluminum oxide -- heating rate -- γ‐dosimeters; Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.3125
• Languages: English
• ISSNs: 1522-7235

Abstract

Abstract: The transparent thermoluminescent aluminum oxide‐based glass of 15Al2 O3 –35P2 O5 –25CaO–25Na2 CO3, abbreviated as APCN (all in mol%) doped with different concentrations of SiO2 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 SiO2 was found at a concentration of 500 ppm (APCNSi5 ). Deconvolution of the glow curve from APCNSi5 resulted in four peaks at about 161, 194, 237 and 293 C with a Figure Of Merit (FOM) of 1.28%. The APCNSi5 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 APCNSi5 glass system was a low‐Z material (Zeff ≈ 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 APCNSi5 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.