Synthesis of MgB4O7:Dy3+and Thermoluminescent Characteristics at Low Doses of Beta Radiation

  • O Legorreta-Alba Institute of Nuclear Sciences, National Autonomous University of Mexico (UNAM), PO Box 70-543, 04510 Mexico City, Mexico; Chemistry Faculty, National Autonomous University of Mexico (UNAM), 3000 Universidad avenue, 04510 Mexico City, México
  • E Cruz-Zaragoza Institute of Nuclear Sciences, National Autonomous University of Mexico (UNAM), PO Box 70-543, 04510 Mexico City, Mexico
  • D Díaz Chemistry Faculty, National Autonomous University of Mexico (UNAM), 3000 Universidad avenue, 04510 Mexico City, México
  • J Marcazzó "Arroyo Seco” Institute of Physics (Uncpba) and Cificen (Uncpba-Cicpba Conicet), Pinto 399, 7000 Tandil, Argentina
Keywords: Magnesium tetraborate, Dysprosium, Thermoluminescence, Beta-radiation, Dosimeter

Abstract

The synthesis and thermoluminescent characteristics of dysprosium-doped MgB4O7 are analyzed. The phosphor at different concentrations (0, 0.1, 0.5, 1, 2 and 4 mol%) of the dopant was prepared by the solution-assisted method. The magnesium borate compound was confirmed by X-ray diffraction. The annealing and dopant concentrations effects on the crystalline matrix were investigated. The highest thermoluminescent sensitivity was found with 450°C of annealing temperature and at high Dy3+ concentration too. The un-doped MgB4O7 phosphor shows a broad glow curve which peaked at 199°C and about 306 °C. Introducing Dy3+ dopant in the matrix that behavior was strongly changed. The wide glow curve shows three glow peaks; two small shoulders at 124 and 195 °C, and a highest peak between 323 and 336 °C temperature range. A large linear dose-response (5 – 2000 mGy) beta dose was obtained. The complex glow curves were deconvolved and the kinetics parameters were determined considering the general order kinetics model.

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Published
2018-08-06
How to Cite
O Legorreta-Alba, E Cruz-Zaragoza, D Díaz, & J Marcazzó. (2018). Synthesis of MgB4O7:Dy3+and Thermoluminescent Characteristics at Low Doses of Beta Radiation. Journal of Nuclear Physics, Material Sciences, Radiation and Applications, 6(1), 71-76. https://doi.org/10.15415/jnp.2018.61012
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Articles