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<p><sup>3</sup>He gas, which is the raw material of <sup>3</sup>He proportional counter widely used in neutron detection, is nearly depleted. Therefore, scintillators containing <sup>6</sup>Li have recently emerged as abundant neutron detection alternatives to those using <sup>3</sup>He. In this study, we developed LiPO<sub>3</sub>–Al(PO<sub>3</sub>)<sub>3</sub>–CeCl<sub>3</sub> glasses with different Ce concentrations as novel glass scintillators and investigated their photoluminescence and scintillation properties. The photoluminescence and X-ray-induced radioluminescence spectra of the fabricated samples showed emissions from Ce<sup>3+</sup> ions. In addition, the photoluminescence quantum yield exceeded 80%. The <sup>252</sup>Cf neutron-induced pulse-height spectra showed a thermal neutron-generated peak for all samples, and the highest light yield estimated from the pulse-height spectra was 1100 photons per thermal neutron. Furthermore, all samples had a short scintillation decay time of approximately 30 ns from the emission of Ce<sup>3+</sup> ions. The successful measurement of the luminescence signals caused by thermal neutrons indicates that the synthesized samples can be used as neutron detectors.</p>

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Photoluminescence and scintillation properties of LiPO3‒Al(PO3)3‒CeCl3 glass scintillators for neutron detection

  • 期刊论文

  • 发表日期：

    2025年4月10日

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  • Ko Hasegawa,
  • Yusuke Nakabayashi,
  • Akito Watanabe,
  • Hiroki Kawamoto,
  • Yutaka Fujimoto,
  • Keisuke Asai

摘要

3He gas, which is the raw material of 3He proportional counter widely used in neutron detection, is nearly depleted. Therefore, scintillators containing 6Li have recently emerged as abundant neutron detection alternatives to those using 3He. In this study, we developed LiPO3–Al(PO3)3–CeCl3 glasses with different Ce concentrations as novel glass scintillators and investigated their photoluminescence and scintillation properties. The photoluminescence and X-ray-induced radioluminescence spectra of the fabricated samples showed emissions from Ce3+ ions. In addition, the photoluminescence quantum yield exceeded 80%. The 252Cf neutron-induced pulse-height spectra showed a thermal neutron-generated peak for all samples, and the highest light yield estimated from the pulse-height spectra was 1100 photons per thermal neutron. Furthermore, all samples had a short scintillation decay time of approximately 30 ns from the emission of Ce3+ ions. The successful measurement of the luminescence signals caused by thermal neutrons indicates that the synthesized samples can be used as neutron detectors.