Evaluation of radiation-induced luminescence properties of Tb-doped LiCaPO4. (August 2022)

• Record Type: Journal Article
• Authors: Takebuchi, Yuma; Koshimizu, Masanori; Shiratori, Daiki; Kato, Takumi; Nakauchi, Daisuke; Kawaguchi, Noriaki; Yanagida, Takayuki
• Is Part Of: Radiation physics and chemistry. Volume 197(2022)
• Publication Date: 2022-08
• Subjects: Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2022.110180
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: We have investigated photoluminescence (PL), scintillation, and dosimetric properties of the undoped and Tb-doped LiCaPO4 samples. The luminescence origin of the undoped and Tb-doped samples were ascribed to the self-trapped exciton (STE) and 4f-4f transitions of the Tb 3+, respectively. In Thermally stimulated luminescence (TSL) glow curves, undoped samples showed main peak at 220 °C, and Tb-doped samples showed main peak at 130 °C. The Tb-doped samples demonstrated the more than 50 times higher TSL intensity than that of undoped one. In addition, the lowest measurable dose (LMD) of the Tb-doped samples were estimated to exceed 1 μGy. Highlights: We synthesized undoped and Tb-doped LiCaPO4 by solid state reaction. The undoped and Tb-doped samples exhibited luminescence due to the STE and 4f-4f transitions of Tb 3+, respectively. Tb-doped samples showed higher TSL intensity than that of commercial dosimeter MSO-S.