title: Thermoluminescent properties of some phosphor glasses based on aluminum oxide.
abstract: The transparent thermoluminescent aluminum oxide-based glass of 15Al2O3-35P2O5-25CaO-25Na2CO3, abbreviated as APCN (all in mol%) doped with different concentrations of SiO2from 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 a60Co source and measured at a heating rate 10 C/sec. The highest TL intensity of the material doped with SiO2was found at a concentration of 500 ppm (APCNSi5). Deconvolution of the glow curve from APCNSi5resulted in four peaks at about 161, 194, 237 and 293 C with a Figure Of Merit (FOM) of 1.28%. The APCNSi5specimen 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 APCNSi5glass 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 (R2= 0.999) and sublinearity behaviour was found. The signal from APCNSi5faded 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.
authors.affiliation: Department of Physics, Faculty of Science, Menoufiya University, Egypt.
authors.forename: I
authors.initials: I
authors.lastname: El Mesady
authors.affiliation: Department of Ionizing Radiation, National Institute of Standards (NIS), Tersa, Giza, Egypt.
authors.forename: N
authors.initials: N
authors.lastname: Khaled
authors.affiliation: Department of Physics, Faculty of Science, Menoufiya University, Egypt.
authors.forename: A
authors.initials: A
authors.lastname: Hussein
authors.affiliation: Department of Physics, Faculty of Science, Menoufiya University, Egypt.
authors.forename: H
authors.initials: H
authors.lastname: El Samman
authors.affiliation: Department of Physics, Faculty of Science, Ibb University, Yemen.
authors.forename: S
authors.initials: S
authors.lastname: Alawsh
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D010758:Phosphorus / Q000737:chemistry*; D011874:Radiometry; D013819:Thermoluminescent Dosimetry
chemical_list: D010758:Phosphorus; D000537:Aluminum Oxide
keywords: aluminum oxide; heating rate; γ-dosimeters