Abstract
Rare earth (Dy3+ and Sm3+)-doped sodium magnesium borate (NaMgBO3) is synthesized by solution combustion synthesis method keeping their thermoluminescence properties in mind. The reaction produced very stable crystalline NaMgBO3:RE (RE = Dy3+, Sm3+) phosphors. The phosphors are exposed to 60Co gamma-ray radiations dose of varying rate from 5 to 25 Gy, and their TL characteristics with kinetic parameters are studied. NaMgBO3:Dy3+ phosphor shows two peaks for lower doping concentration of Dy3+ while it reduced to single peak for the higher concentrations of activator Dy3+. NaMgBO3:Dy3+ shows the major glow peak around 200 °C while NaMgBO3:Sm3+ phosphors show two well-separated glow peaks at 200 and 332 °C respectively. The thermoluminescence intensity of these phosphors was compare with the commercially available TLD-100 (Harshaw) phosphor. The TL responses for gamma-ray radiations dose were found to be linear from 5 to 25 Gy for both phosphors while the fading in each case is calculated for the tenure of 45 days.
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ZSK is grateful to the UGC-New Delhi, for financial support, and to the Head, Department of Physics, SGB Amravati University, for providing necessary facilities
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Khan, Z.S., Ingale, N.B. & Omanwar, S.K. Synthesis and thermoluminescence properties of rare earth-doped NaMgBO3 phosphor. Environ Sci Pollut Res 23, 9295–9302 (2016). https://doi.org/10.1007/s11356-015-4993-6
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DOI: https://doi.org/10.1007/s11356-015-4993-6