Year: 2025
Type: article
Abstract: We fabricated 0.1, 0.3, 1.0, and 3.0 % Tb-doped SrTa2O6 single crystal samples using the floating zone method to evaluate their photoluminescence and scintillation properties. The XRD measurement results showed no impurity phases and retained a single-phase structure for all samples. In addition, no clear peak shift was observed, which was thought to be due to a small amount of Tb3+ substituted on the Sr2+ site or the substitution of Tb4+ with a close ionic radius on the Ta5+ site. The photoluminescence measurements of all the samples confirmed luminescence due to the 4f–4f transitions of Tb3+ ions at an excitation wavelength of 280 nm, and the maximum internal quantum yield of 25.5 % was observed in the 0.1 % sample. The scintillation spectra were obtained under X-ray irradiation, and several emission peaks were observed in all the samples, originating from 4f–4f transitions of Tb3+ ions. The maximum scintillation integral intensity was obtained in the 0.3 % sample, which was about 47 % of the values of BGO set to 100 %.
Institutions: Fukuoka University, Nara Institute of Science and Technology
Language: English
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: Foundation for Nara Institute of Science and Technology, Research Center for Biomedical Engineering, Ministry of Education, Culture, Sports, Science and Technology, Iwatani Naoji Foundation, Iketani Science and Technology Foundation, Tokuyama Science Foundation, Japan Society for the Promotion of Science
OpenAlex ID: W4408805218