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<p>Thermoluminescent (TL) materials based on Mn<sup>2</sup>⁺-doped Li<sub>2</sub>O–CaO–P<sub>2</sub>O<sub>5</sub> glasses were developed for neutron detection. After X-ray irradiation, a distinct TL glow peak was observed at approximately 520&#xa0;K, and the TL intensities of the <sup>6</sup>Li-enriched and <sup><i>n</i></sup>Li samples were nearly identical, indicating that the X-ray sensitivity was essentially independent of the lithium isotopic composition. In contrast, following thermal neutron irradiation, the <sup>6</sup>Li-enriched glass exhibited a markedly higher TL intensity than the <sup><i>n</i></sup>Li glass, demonstrating that charged particles generated by the <sup>6</sup>Li(<i>n</i>, <i>α</i>)<sup>3</sup>H reaction efficiently induced TL. Moreover, the TL intensity attributable to the <sup>6</sup>Li(<i>n</i>, <i>α</i>)<sup>3</sup>H reaction increased linearly with neutron fluence in the range of 10<sup>6</sup>–10<sup>11</sup> neutrons cm<sup>−2</sup>. Overall, these results indicate that Mn<sup>2+</sup>-doped Li<sub>2</sub>O–CaO–P<sub>2</sub>O<sub>5</sub> glasses are promising candidates for simple, stable, and low-cost thermoluminescent neutron detectors.</p>

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Thermoluminescence response of Mn2+-doped Li2O–CaO–P2O5 glasses for neutron detection

  • 期刊论文

  • 发表日期：

    2026年5月26日

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  • Shogo Takatsu,
  • Hiroki Kawamoto,
  • Yutaka Fujimoto,
  • Masanori Koshimizu,
  • Genichiro Wakabayashi,
  • Keisuke Asai

摘要

Thermoluminescent (TL) materials based on Mn2⁺-doped Li2O–CaO–P2O5 glasses were developed for neutron detection. After X-ray irradiation, a distinct TL glow peak was observed at approximately 520 K, and the TL intensities of the 6Li-enriched and nLi samples were nearly identical, indicating that the X-ray sensitivity was essentially independent of the lithium isotopic composition. In contrast, following thermal neutron irradiation, the 6Li-enriched glass exhibited a markedly higher TL intensity than the nLi glass, demonstrating that charged particles generated by the 6Li(n, α)3H reaction efficiently induced TL. Moreover, the TL intensity attributable to the 6Li(n, α)3H reaction increased linearly with neutron fluence in the range of 106–1011 neutrons cm−2. Overall, these results indicate that Mn2+-doped Li2O–CaO–P2O5 glasses are promising candidates for simple, stable, and low-cost thermoluminescent neutron detectors.