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<p>The Li<sub>2</sub>O-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> glasses doped with Dy<sub>2</sub>O<sub>3</sub> were effectively produced using the melt quenching process. Furthermore, to examine their physical properties, including X-ray diffraction (XRD), differential thermal analysis (DTA), Fourier-transform infrared spectroscopy (FT-IR), mechanical properties, radiation shielding, dielectric properties, thermoluminescence, and spectroscopic features. XRD, DTA, and FT-IR were employed to analyse the structural properties of the glasses. These studies elucidate the amorphous characteristics of glasses, the transitions among glasses, and the diverse molecular vibrations occurring within the amorphous lattice. The Archimedes principle was utilized to evaluate glasses to ascertain the variations in density among them. The ultrasonic velocities of glasses were determined using an ultrasonic defect detector. The elastic properties of glasses were assessed by density measurements and ultrasonic velocity analysis of the test samples. These results furnish data concerning the requisite range of elastic modulus and micro-hardness for test glasses. The TL results were examined utilizing the peak-shape methodology integrated into the procedure. This indicates the frequency factor and activation energies of glasses required for the advancement of TL dosimeter applications. The Judd–Ofelt (J-O) intensity values were derived from absorption spectra, indicating a prominent yellow emission at 575&#xa0;nm when excited at 452&#xa0;nm. After measuring the experimental durations (τ<sub>r</sub>) for the luminescence transition from <sup>4</sup>F<sub>9/2</sub> to <sup>6</sup>H<sub>13/2</sub> at a wavelength of 575&#xa0;nm, calculations were conducted to ascertain emission cross-sections (σ<sub>se</sub>), branching ratios (β<sub>r</sub>), and quantum efficiency (η). The calculations revealed that lithium yttrium silicate glasses doped with Dy<sup>3+</sup> ions may function as effective gain media for yellow lasers. To further test the efficacy of these glasses for yellow laser applications, quantum efficiencies were assessed via decay curve analysis, and the CIE chromaticity coordinates were extracted from the emission spectra. It was determined that the YD-0.25 glass composition was especially appropriate for applications of this type. In conclusion, the Li<sub>2</sub>O-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> glasses doped with Dy<sub>2</sub>O<sub>3</sub> exhibited mechanical durability, thermoluminescent activity, and optical properties, rendering them suitable for many technological applications.</p>

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Investigations on thermoluminescence, photoluminescence and radiation shielding properties of Dy2O3 doped Li2O-Al2O3-SiO2-Y2O3 glasses for thermoluminescent dosimeter applications

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Ravi Kumar Guntu,
  • Padala Ashok,
  • K. Sivaram,
  • Poornima B. Shetty,
  • Satheesh Babu,
  • Mohammad Israr

摘要

The Li2O-Al2O3-SiO2-Y2O3 glasses doped with Dy2O3 were effectively produced using the melt quenching process. Furthermore, to examine their physical properties, including X-ray diffraction (XRD), differential thermal analysis (DTA), Fourier-transform infrared spectroscopy (FT-IR), mechanical properties, radiation shielding, dielectric properties, thermoluminescence, and spectroscopic features. XRD, DTA, and FT-IR were employed to analyse the structural properties of the glasses. These studies elucidate the amorphous characteristics of glasses, the transitions among glasses, and the diverse molecular vibrations occurring within the amorphous lattice. The Archimedes principle was utilized to evaluate glasses to ascertain the variations in density among them. The ultrasonic velocities of glasses were determined using an ultrasonic defect detector. The elastic properties of glasses were assessed by density measurements and ultrasonic velocity analysis of the test samples. These results furnish data concerning the requisite range of elastic modulus and micro-hardness for test glasses. The TL results were examined utilizing the peak-shape methodology integrated into the procedure. This indicates the frequency factor and activation energies of glasses required for the advancement of TL dosimeter applications. The Judd–Ofelt (J-O) intensity values were derived from absorption spectra, indicating a prominent yellow emission at 575 nm when excited at 452 nm. After measuring the experimental durations (τr) for the luminescence transition from 4F9/2 to 6H13/2 at a wavelength of 575 nm, calculations were conducted to ascertain emission cross-sections (σse), branching ratios (βr), and quantum efficiency (η). The calculations revealed that lithium yttrium silicate glasses doped with Dy3+ ions may function as effective gain media for yellow lasers. To further test the efficacy of these glasses for yellow laser applications, quantum efficiencies were assessed via decay curve analysis, and the CIE chromaticity coordinates were extracted from the emission spectra. It was determined that the YD-0.25 glass composition was especially appropriate for applications of this type. In conclusion, the Li2O-Al2O3-SiO2-Y2O3 glasses doped with Dy2O3 exhibited mechanical durability, thermoluminescent activity, and optical properties, rendering them suitable for many technological applications.