Optical-stimulated luminescence properties of undoped and Eu-doped LiCl transparent ceramics synthesized by spark plasma sintering method

Kensei Ichiba; Hiromi Kimura; Yuma Takebuchi; Takumi Kato; Daisuke Nakauchi; Noriaki Kawaguchi; Takayuki Yanagida

doi:10.1016/j.apradiso.2024.111528

Optical-stimulated luminescence properties of undoped and Eu-doped LiCl transparent ceramics synthesized by spark plasma sintering method

Appl Radiat Isot. 2024 Dec:214:111528. doi: 10.1016/j.apradiso.2024.111528. Epub 2024 Sep 24.

Authors

Kensei Ichiba¹, Hiromi Kimura², Yuma Takebuchi³, Takumi Kato⁴, Daisuke Nakauchi⁴, Noriaki Kawaguchi⁴, Takayuki Yanagida⁴

Affiliations

¹ Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan. Electronic address: ichiba.kensei.if7@ms.naist.jp.
² National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, Ibaraki, 305-8568, Japan.
³ Development of Fundamental Engineering, 7-1-2,Youtou, Utsunomiya, Tochigi 7-12, Japan.
⁴ Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan.

PMID: 39332266
DOI: 10.1016/j.apradiso.2024.111528

Abstract

The undoped and Eu-doped LiCl transparent ceramics were synthesized, and their photoluminescence (PL) and optical stimulated luminescence (OSL) properties were evaluated. The PL properties of the undoped sample revealed as emission band due to a defect center. Additionally, the Eu-doped samples exhibited an emission band due to the 5d-4f transitions of Eu²⁺ ions. The OSL phenomenon was observed only in the Eu-doped samples and was not present in the undoped sample. The OSL spectra of the Eu-doped samples showed as emission band at 430 nm under stimulated at 490 nm, which was due to the 5d-4f transitions of Eu²⁺ ions. Based on the dose response functions, the lower detection limits of the Eu-doped samples were indicated as 10 mGy (0.1% Eu) and 1 mGy (0.5% and 1.0% Eu), and the 0.5% Eu-doped sample exhibited the highest OSL intensity among the Eu-doped samples.