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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials, Volume 38, Number 2(1) (2026)
Copyright(C) MYU K.K.
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


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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.



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