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<p>The influence of particle size on the thermoluminescence (TL) characteristics of the newly prepared La<sub>2</sub>O<sub>3</sub>-doped boro-phosphate glasses was explored. La<sub>2</sub>O<sub>3</sub> was added in different concentrations to the glass structure. A reasonable response was obtained for that contains 0.7&#xa0;mol. % La<sub>2</sub>O<sub>3</sub>. To study the grain-size effect for glass structure with dopant 0.7% La<sub>2</sub>O<sub>3</sub>, the prepared sample was ground, sieved and divided into grain sizes (80, 160, 200, 315&#xa0;µm). X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the produced fractions of different grain sizes. The highest integrated TL intensity was obtained for grains 80 and 160&#xa0;µm. Linear dose–response curve up to 20&#xa0;Gy is obtained for all grain sizes from 80 to 315&#xa0;µm. Deconvolution was made for 80&#xa0;µm and 160&#xa0;µm grain-size samples to obtain the other dosimetric characteristics; trap parameters and fading, using the PeakFit program. Fading was studied for 80 and 160&#xa0;µm grain-size samples and found that for the 80&#xa0;µm sample, there is extraordinarily little fading from 9 and 14&#xa0;days for peaks 1 and 2 at (100–180 ºC) (120–200 ºC), respectively. The residual was more than ~ 80% after 22&#xa0;days for peak 3 (140–225 ºC). For the 160&#xa0;µm sample, there is a negligible fading from the second day up to 25&#xa0;days for peak 3, and for peak 4, there is insignificant fading for more than a week. The high dependence of the dosimetric properties on the grain size of the prepared glass samples was recorded.</p>

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Impact of grain size on the thermoluminescence properties of La2O3-doped boro-phosphate glasses

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • I. A. El-Mesady,
  • M. M. Abd-Elsamea,
  • A. E. Hussein,
  • W. M. Abd-Allah,
  • Huda. A. Alazab

摘要

The influence of particle size on the thermoluminescence (TL) characteristics of the newly prepared La2O3-doped boro-phosphate glasses was explored. La2O3 was added in different concentrations to the glass structure. A reasonable response was obtained for that contains 0.7 mol. % La2O3. To study the grain-size effect for glass structure with dopant 0.7% La2O3, the prepared sample was ground, sieved and divided into grain sizes (80, 160, 200, 315 µm). X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the produced fractions of different grain sizes. The highest integrated TL intensity was obtained for grains 80 and 160 µm. Linear dose–response curve up to 20 Gy is obtained for all grain sizes from 80 to 315 µm. Deconvolution was made for 80 µm and 160 µm grain-size samples to obtain the other dosimetric characteristics; trap parameters and fading, using the PeakFit program. Fading was studied for 80 and 160 µm grain-size samples and found that for the 80 µm sample, there is extraordinarily little fading from 9 and 14 days for peaks 1 and 2 at (100–180 ºC) (120–200 ºC), respectively. The residual was more than ~ 80% after 22 days for peak 3 (140–225 ºC). For the 160 µm sample, there is a negligible fading from the second day up to 25 days for peak 3, and for peak 4, there is insignificant fading for more than a week. The high dependence of the dosimetric properties on the grain size of the prepared glass samples was recorded.