Neutron detection via thermoluminescence of Tb3+-doped Li2O–Al2O3–B2O3 glasses. (15th February 2021)

• Record Type: Journal Article
• Authors: Kawamura, Ichiro; Kawamoto, Hiroki; Fujimoto, Yutaka; Koshimizu, Masanori; Okada, Go; Wakabayashi, Genichiro; Nogami, Mitsuhiro; Hitomi, Keitaro; Watanabe, Kenichi; Yanagida, Takayuki; Asai, Keisuke
• Is Part Of: Japanese journal of applied physics. Volume 60:Number 3(2021)
• Publication Date: 2021-02-15
• Subjects: Neutron detector -- Dosimeter -- Thermoluminescence -- 6Li(n -- t)4He reaction -- 10B(n -- α)7Li reaction; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/abdf7d
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: We fabricated Tb 3+ -doped Li2 O–Al2 O3 –B2 O3 glasses using 6 Li or n Li and 10 B or 11 B ( 6 Li– 10 B glass, 6 Li– 11 B glass, n Li– 10 B glass, and n Li– 11 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 6 Li– 10 B glass, 6 Li– 11 B glass, and n Li– 10 B glass after neutron irradiation were higher than that of n Li– 11 B glass, suggesting that the particles generated in 6 Li( n, t ) 4 He and 10 B( n, α ) 7 Li reactions efficiently induce TL. We observed neutron-induced TL in the range 1 × 10 7 –5 × 10 8 neutrons cm −2, and the detectable minimum thermal neutron fluence of this glass was estimated to be approximately 4 × 10 6 neutrons cm −2 .