title: Thermoluminescence properties of lithium magnesium borate glasses system doped with dysprosium oxide.
abstract: We report the impact of dysprosium (Dy(3+)) dopant and magnesium oxide (MgO) modifier on the thermoluminescent properties of lithium borate (LB) glass via two procedures. The thermoluminescence (TL) glow curves reveal a single prominent peak at 190 °C for 0.5 mol% of Dy(3+). An increase in MgO contents by 10 mol% enhances the TL intensity by a factor of 1.5 times without causing any shift in the maximum temperature. This enhancement is attributed to the occurrence of extra electron traps created via magnesium and the energy transfer to trivalent Dy(3+) ions. Good linearity in the range of 0.01-4 Gy with a linear correlation coefficient of 0.998, fading as low as 21% over a period of 3 months, excellent reproducibility without oven annealing and tissue equivalent effective atomic numbers ~8.71 are achieved. The trap parameters, including geometric factor (μg), activation energy (E) and frequency factor (s) associated with LMB:Dy are also determined. These favorable TL characteristics of prepared glasses may contribute towards the development of Li2O-MgO-B2O3 radiation dosimeters.
authors.affiliation: Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Skudai Johor, Malaysia.|Radiation Protection Directorate, Energy and Minerals Regulatory Commission, 11183, Amman, Jordan.
authors.forename: M H A
authors.initials: MH
authors.lastname: Mhareb
authors.affiliation: Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Skudai Johor, Malaysia.
authors.forename: S
authors.initials: S
authors.lastname: Hashim
authors.affiliation: Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Skudai Johor, Malaysia.
authors.forename: S K
authors.initials: SK
authors.lastname: Ghoshal
authors.affiliation: Department of Medical Radiography, Al-Azhar University, Gaza Strip, Palestine.
authors.forename: Y S M
authors.initials: YS
authors.lastname: Alajerami
authors.affiliation: Nuclear Engineering Programme, Faculty of Petroleum and Renewable Energy Engineering, Universiti Teknologi, Malaysia.
authors.forename: M A
authors.initials: MA
authors.lastname: Saleh
authors.affiliation: Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Skudai Johor, Malaysia.
authors.forename: N A B
authors.initials: NA
authors.lastname: Razak
authors.affiliation: Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Skudai Johor, Malaysia.
authors.forename: S A B
authors.initials: SA
authors.lastname: Azizan
mesh_terms: D001881:Borates / Q000737:chemistry*; D004419:Dysprosium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry*; D017616:Magnesium Compounds / Q000737:chemistry*
chemical_list: D001881:Borates; D017616:Magnesium Compounds; D004419:Dysprosium; C034034:magnesium borate; D008094:Lithium; C030582:dysprosium oxide
keywords: dysprosium oxide; lithium magnesium borate glass; thermoluminescence