Influence of calcium doping concentration on the performance of Ce, Ca:LuAG scintillation ceramics. Issue 13 (October 2022)

• Record Type: Journal Article
• Authors: Zhu, Danyang; Chen, Xiaopu; Beitlerova, Alena; Kucerkova, Romana; Li, Xiaoying; Liu, Ziyu; Xie, Tengfei; Chen, Haohong; Chewpraditkul, Weerapong; Nikl, Martin; Li, Jiang
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 13(2022)
• Page Start: 6075
• Page End: 6084
• Publication Date: 2022-10
• Subjects: Ce, Ca:LuAG ceramics -- Microstructure -- Scintillation performance -- Luminescence decay; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2022.06.023
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Ce, Ca:LuAG scintillation ceramics with different Ca 2+ co-doping concentrations were prepared by the solid-state reaction method. The concentration of Ce 3+ was fixed at 0.3 at% and the concentration of Ca 2+ ranged from 0 to 1.2 at%. We systematically studied how the Ca 2+ concentration affects the optical quality of Ce, Ca:LuAG ceramics by influencing the microstructure in the vacuum sintering and HIP post-treatment. Good optical transmittance could be obtained with Ca 2+ concentrations between 0.05 and 0.8 at%, which reached 76.0–81.9 % at 520 nm. The PL and scintillation decay times decrease with increasing Ca 2+ concentration up to 0.6 at% with no clear trend above this value. The light yield (LY) values at different shaping times decrease with increasing Ca 2+ concentration but the fast scintillation component (LY0.5 μs / LY3.0 μs ) increases significantly from 79 % to 97 %. The co-doping of Ca 2+ also reduces the afterglow level by more than one order of magnitude. Highlights: Ce, Ca:LuAG scintillation ceramics were fabricated by the two-step sintering method. A wide range of Ca 2+ co-doping concentration was systemically investigated. Scintillation decay accelerate with increasing Ca 2+ concentration up to 0.6 at%. Ca 2+ co-doping optimizes the fast scintillation component from 79 % to 97 %.