Neutron detection via thermoluminescence of Tb3+-doped Li2O–Al2O3–B2O3glasses

Ichiro Kawamura, Hiroki Kawamoto, Yutaka Fujimoto, Masanori Koshimizu, Go Okada, Genichiro Wakabayashi, Mitsuhiro Nogami, Keitaro Hitomi, Kenichi Watanabe, Takayuki Yanagida, Keisuke Asai

doi:10.35848/1347-4065/abdf7d

<jats:title>Abstract</jats:title><jats:p>We fabricated Tb<jats:sup>3+</jats:sup>-doped Li<jats:sub>2</jats:sub>O–Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–B<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>glasses using<jats:sup>6</jats:sup>Li or<jats:italic><jats:sup>n</jats:sup></jats:italic>Li and<jats:sup>10</jats:sup>B or<jats:sup>11</jats:sup>B (<jats:sup>6</jats:sup>Li–<jats:sup>10</jats:sup>B glass,<jats:sup>6</jats:sup>Li–<jats:sup>11</jats:sup>B glass,<jats:sup>n</jats:sup>Li–<jats:sup>10</jats:sup>B glass, and<jats:sup>n</jats:sup>Li–<jats:sup>11</jats:sup>B glass) to develop a new thermoluminescent (TL) material for neutron detection and investigated the TL properties of these glasses after X-ray, He ion, and neutron irradiation. TL glow peaks were observed at 350 and 550 K after X-ray irradiation, at 390 and 550 K after He ion irradiation, and at 400 and 600 K after neutron irradiation. The TL intensities around 400 K for<jats:sup>6</jats:sup>Li–<jats:sup>10</jats:sup>B glass,<jats:sup>6</jats:sup>Li–<jats:sup>11</jats:sup>B glass, and<jats:italic><jats:sup>n</jats:sup></jats:italic>Li–<jats:sup>10</jats:sup>B glass after neutron irradiation were higher than that of<jats:italic><jats:sup>n</jats:sup></jats:italic>Li–<jats:sup>11</jats:sup>B glass, suggesting that the particles generated in<jats:sup>6</jats:sup>Li(<jats:italic>n</jats:italic>,<jats:italic>t</jats:italic>)<jats:sup>4</jats:sup>He and<jats:sup>10</jats:sup>B(<jats:italic>n</jats:italic>,<jats:italic>α</jats:italic>)<jats:sup>7</jats:sup>Li reactions efficiently induce TL. We observed neutron-induced TL in the range 1 × 10<jats:sup>7</jats:sup>–5 × 10<jats:sup>8</jats:sup>neutrons cm<jats:sup>−2</jats:sup>, and the detectable minimum thermal neutron fluence of this glass was estimated to be approximately 4 × 10<jats:sup>6</jats:sup>neutrons cm<jats:sup>−2</jats:sup>.</jats:p>

Neutron detection via thermoluminescence of Tb<sup>3+</sup>-doped Li<sub>2</sub>O–Al<sub>2</sub>O<sub>3</sub>–B<sub>2</sub>O<sub>3</sub>glasses

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