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<p>Advanced radiation-shielding glasses are essential for ensuring safety in environments exposed to ionizing radiation. In this study, the gamma (γ) irradiation effects on the structural, optical, luminescent, and shielding properties of 5La<sub>2</sub>O<sub>3</sub>+15PbO + 49.5B<sub>2</sub>O<sub>3</sub>+30TeO<sub>2</sub>+0.5Er<sub>2</sub>O<sub>3</sub> glasses were systematically investigated. γ-irradiation induced notable structural modifications, as confirmed by Raman spectroscopy, indicating network depolymerization and increased NBOs formation. Optical analysis revealed a significant reduction in the indirect band gap (2.62–1.58&#xa0;eV) and an increase in Urbach energy (0.256–1.01&#xa0;eV) with increasing dose up to 90&#xa0;kGy. Photoluminescence studies showed dominant green emissions from Er<sup>3+</sup> transitions, with gradual intensity reduction at higher doses due to radiation-induced defect centers. Despite these changes, lifetime values exhibited only slight variation, demonstrating good radiation stability. Shielding performance evaluated using Phy-X software (in the energy range from 0.015&#xa0;MeV to 15&#xa0;MeV) revealed superior attenuation parameters compared to commercial concretes and standard shielding glasses. These results demonstrate that the developed glass system is a promising multifunctional material for radiation-resistant photonic and optoelectronic devices, including smart shielding windows, optical amplifiers, and luminescent components operating in high-radiation environments.</p>

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Impact of γ-irradiation on luminescence and structural features of Er3+-doped lanthanum-lead-boro-tellurite glasses

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • S. Hemalatha,
  • Areej S. Alqarni,
  • Upendra Kumar Kagola,
  • N. Suriyamurthy,
  • R. Rajaramakrishna,
  • A. Anto Jeffery,
  • N. Srinatha,
  • A. Madhu

摘要

Advanced radiation-shielding glasses are essential for ensuring safety in environments exposed to ionizing radiation. In this study, the gamma (γ) irradiation effects on the structural, optical, luminescent, and shielding properties of 5La2O3+15PbO + 49.5B2O3+30TeO2+0.5Er2O3 glasses were systematically investigated. γ-irradiation induced notable structural modifications, as confirmed by Raman spectroscopy, indicating network depolymerization and increased NBOs formation. Optical analysis revealed a significant reduction in the indirect band gap (2.62–1.58 eV) and an increase in Urbach energy (0.256–1.01 eV) with increasing dose up to 90 kGy. Photoluminescence studies showed dominant green emissions from Er3+ transitions, with gradual intensity reduction at higher doses due to radiation-induced defect centers. Despite these changes, lifetime values exhibited only slight variation, demonstrating good radiation stability. Shielding performance evaluated using Phy-X software (in the energy range from 0.015 MeV to 15 MeV) revealed superior attenuation parameters compared to commercial concretes and standard shielding glasses. These results demonstrate that the developed glass system is a promising multifunctional material for radiation-resistant photonic and optoelectronic devices, including smart shielding windows, optical amplifiers, and luminescent components operating in high-radiation environments.