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pp. 553-558
S&M4320 Research paper https://doi.org/10.18494/SAM6019 Published: February 6, 2026 Evaluation of Scintillation Properties of LiBr:Yb for Thermal Neutron Detection [PDF] Keiichiro Miyazaki, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, and Takayuki Yanagida (Received October 21, 2025; Accepted December 16, 2025) Keywords: scintillator, neutron detection, Bridgman-Stockbarger method, α/γ ratio
Scintillation properties of LiBr:Yb synthesized by the vertical Bridgman–Stockbarger method were investigated. Two emission peaks were observed at 415 and 450 nm under X-ray irradiation, which would be attributed to spin-allowed and spin-forbidden 5d–4f transitions of Yb2+, respectively. According to pulse height spectra, the highest light yield values (LY) were 3500 photons/neutron and 1900 photons/MeV under 252Cf neutron and 137Cs γ-ray irradiation, respectively, and the α/γ ratio was 0.38. Although the LY was lower than that of the commercial Li-glass scintillator (GS20), the α/γ ratio was comparable to or higher than that of GS20.
Corresponding author: Keiichiro Miyazaki![]() ![]() This work is licensed under a Creative Commons Attribution 4.0 International License. Cite this article Keiichiro Miyazaki, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, and Takayuki Yanagida, Evaluation of Scintillation Properties of LiBr:Yb for Thermal Neutron Detection, Sens. Mater., Vol. 38, No. 2, 2026, p. 553-558. |