Development of Dy-doped CaHfO3 single crystal scintillator for X-ray detectors

Dy:CaHfO3 single crystals were synthesized by the floating zone technique and examined for their photoluminescence and scintillation properties. Under excitation at 350 nm, the 3.0 % Dy:CaHfO3 showed the highest quantum yield of 72.5 % among all the samples. Under X-ray irradiation, all the samples...

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Bibliographic Details
Published in:Optical materials 2024-11, Vol.157, p.116276, Article 116276
Main Authors: Endo, Yusuke, Ichiba, Kensei, Nakauchi, Daisuke, Okazaki, Kai, Watanabe, Kenichi, Kato, Takumi, Kawaguchi, Noriaki, Yanagida, Takayuki
Format: Article
Language:English
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Summary:Dy:CaHfO3 single crystals were synthesized by the floating zone technique and examined for their photoluminescence and scintillation properties. Under excitation at 350 nm, the 3.0 % Dy:CaHfO3 showed the highest quantum yield of 72.5 % among all the samples. Under X-ray irradiation, all the samples showed multiple emission peaks at 480, 575, and 670 nm associated with the 4f–4f transitions of Dy3+. Pulse height spectra of 137Cs as a γ-ray source revealed 3.0 % Dy:CaHfO3 showed the highest light yield of 20,000 photons/MeV among the samples. •Scintillation properties of Dy:CaHfO3 single crystals synthesized by the floating zone technique were investigated.•The light yield values were 13,000 for 1.0 %, 17,000 for 2.0 %, and 20,000 for 3.0 %, 14,000 for 4.0 %, 11,000 photons/MeV for 10 % Dy:CaHfO3.•The light yield values of 2.0 % and 3.0 % Dy:CaHfO3 were higher than that of CdWO4 which is a common scintillator.
ISSN:0925-3467
DOI:10.1016/j.optmat.2024.116276