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<p>Undoped and Eu-doped CaCl<sub>2</sub> transparent ceramics were successfully fabricated for the first time, and their optical and scintillation properties were systematically investigated. The PL quantum yields of the 0.1, 0.25, 0.5, and 1.0% Eu-doped CaCl<sub>2</sub> transparent ceramics were 51, 46, 42, and 53%, respectively. Photoluminescence and scintillation spectra showed a broad emission peak at 430&#xa0;nm, attributed to the 5d–4f transitions of Eu<sup>2+</sup>, with decay times of 0.56–1.2&#xa0;μs. The 1.0% Eu-doped CaCl<sub>2</sub> transparent ceramic exhibited a scintillation light yield of 400 ph/5.5&#xa0;MeV under <sup>241</sup>Am α-ray irradiation. The afterglow level of this sample was measured to be 30&#xa0;ppm.</p>

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Effect of Eu-doping on optical and scintillation properties of CaCl2 transparent ceramics

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Takeshi Ubukata,
  • Shota Otake,
  • Hiromi Kimura,
  • Takumi Kato,
  • Daisuke Nakauchi,
  • Noriaki Kawaguchi,
  • Takayuki Yanagida

摘要

Undoped and Eu-doped CaCl2 transparent ceramics were successfully fabricated for the first time, and their optical and scintillation properties were systematically investigated. The PL quantum yields of the 0.1, 0.25, 0.5, and 1.0% Eu-doped CaCl2 transparent ceramics were 51, 46, 42, and 53%, respectively. Photoluminescence and scintillation spectra showed a broad emission peak at 430 nm, attributed to the 5d–4f transitions of Eu2+, with decay times of 0.56–1.2 μs. The 1.0% Eu-doped CaCl2 transparent ceramic exhibited a scintillation light yield of 400 ph/5.5 MeV under 241Am α-ray irradiation. The afterglow level of this sample was measured to be 30 ppm.