Tb:Gd9.33(SiO4)6O2 oxyapatite as an X-ray scintillator
Abstract
Gd9.33−xTbx(SiO4)6O2 (x = 0, 0.093, 0.467, 0.933, 1.866, 2.799, 3.732) oxyapatite single crystals were grown by the floating zone method, and their photoluminescence (PL) and scintillation properties were systematically investigated. Under UV and X-ray excitation, the samples exhibited emission peaks due to the 4f–4f transitions of Gd3+ and Tb3+. The decay times were on the milliseconds scale, consistent with Tb3+ emission. The PL quantum yields of the 1–30 % Tb-doped samples were approximately 70 %, and the light yield of the 10 % Tb-doped sample was 15400 photons/MeV, as calculated from the pulse height spectra under 137Cs γ-ray irradiation.
Fields of Study & Subjects
Luminescence Properties of Advanced Materials
Radiation Detection and Scintillator Technologies
Nuclear materials and radiation effects
Publication details
- Journal / source
- Journal of the Ceramic Society of Japan
- Publisher
- Ceramic Society of Japan
- Volume
- 134
- Issue
- 3
- Pages
- 133–139
- Publication date
- 28 February 2026
- Language
- EN