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<p>High-density glass has emerged as a viable alternative for next-generation scintillation applications owing to its exceptional physical and chemical stability, in addition to its cost-effectiveness. A series of Ce<sup>3+</sup>-activated gadolinium gallium borosilicate (GGBS<sub><i>x</i></sub>) glass scintillators was synthesized via vacuum melt-quenching. With the Gd<sub>2</sub>O<sub>3</sub> content increases, both the density (5.86 to 6.05 g/cm<sup>3</sup>) and molar volume (36.43 to 39.79 cm<sup>3</sup>/mol) exhibit a steady increase. The structural characteristics of the glass system were elucidated through extended X-ray absorption fine structure (EXAFS) analysis. GGBS<sub>1</sub> glass exclusively includes Ce<sup>3+</sup>, which adopts a hexahedral [CeO<sub>6</sub>] configuration, whereas Gd exhibits both hexahedral and octahedral coordination configurations, characterized by a bond length of 2.35±0.1 Å and a <i>σ</i><sup>2</sup> of 0.0122±0.0015 Å<sup>2</sup>. In addition, as the Gd<sub>2</sub>O<sub>3</sub> content grows, the shallow trap depth escalates from 0.804 to 0.858 eV, whereas the deep trap depth initially ascends from 0.948 to 1.434 eV before subsequently declining to 1.010 eV. The GGBS<sub>1</sub> glass exhibits a high transmittance of around 80% in the visible range and a photoluminescence quantum yield of 78.4%. Under X-ray irradiation, GGBS<sub>1</sub> glass demonstrates a maximum X-ray excited luminescence intensity of 128.5% compared with the Bi<sub>4</sub>Ge<sub>3</sub>O<sub>12</sub> (BGO) crystal, while its spatial resolution attains 29.1 lp/mm, nearing the greatest value recorded for glass scintillators. Furthermore, the glass exhibits a light yield of 1058 photons/MeV with an energy resolution of 23.7% at 662 keV under <i>γ</i>-ray excitation. These studies indicate that GGBS<sub>1</sub> glass scintillator warrants further advancement for potential applications.</p>

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Novel Ce3+-activated gadolinium-based glass prepared in vacuum: structure and scintillation

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Zhehao Hua,
  • Dandan Zhang,
  • Yuecheng Lai,
  • Hua Cai,
  • Haizheng Tao,
  • Sen Qian,
  • Jifeng Han,
  • Lili Hu,
  • Jinsheng Jia,
  • Weichang Li,
  • Xvsheng Qiao,
  • Jing Ren,
  • Xin-Yuan Sun,
  • Gao Tang,
  • Yinsheng Xu,
  • Shenghua Yin,
  • Huiping Yuan,
  • Lirong Zheng

摘要

High-density glass has emerged as a viable alternative for next-generation scintillation applications owing to its exceptional physical and chemical stability, in addition to its cost-effectiveness. A series of Ce3+-activated gadolinium gallium borosilicate (GGBSx) glass scintillators was synthesized via vacuum melt-quenching. With the Gd2O3 content increases, both the density (5.86 to 6.05 g/cm3) and molar volume (36.43 to 39.79 cm3/mol) exhibit a steady increase. The structural characteristics of the glass system were elucidated through extended X-ray absorption fine structure (EXAFS) analysis. GGBS1 glass exclusively includes Ce3+, which adopts a hexahedral [CeO6] configuration, whereas Gd exhibits both hexahedral and octahedral coordination configurations, characterized by a bond length of 2.35±0.1 Å and a σ2 of 0.0122±0.0015 Å2. In addition, as the Gd2O3 content grows, the shallow trap depth escalates from 0.804 to 0.858 eV, whereas the deep trap depth initially ascends from 0.948 to 1.434 eV before subsequently declining to 1.010 eV. The GGBS1 glass exhibits a high transmittance of around 80% in the visible range and a photoluminescence quantum yield of 78.4%. Under X-ray irradiation, GGBS1 glass demonstrates a maximum X-ray excited luminescence intensity of 128.5% compared with the Bi4Ge3O12 (BGO) crystal, while its spatial resolution attains 29.1 lp/mm, nearing the greatest value recorded for glass scintillators. Furthermore, the glass exhibits a light yield of 1058 photons/MeV with an energy resolution of 23.7% at 662 keV under γ-ray excitation. These studies indicate that GGBS1 glass scintillator warrants further advancement for potential applications.