Ce-doping effect on dosimetric properties of mullite single crystals synthesized by the floating zone method

Kensei Ichiba; Yuma Takebuchi; Hiroyuki Fukushima; Takumi Kato; Daisuke Nakauchi; Noriaki Kawaguchi; Takayuki Yanagida

doi:10.1016/j.apradiso.2022.110521

Ce-doping effect on dosimetric properties of mullite single crystals synthesized by the floating zone method

Appl Radiat Isot. 2022 Dec:190:110521. doi: 10.1016/j.apradiso.2022.110521. Epub 2022 Oct 20.

Authors

Kensei Ichiba¹, Yuma Takebuchi², Hiroyuki Fukushima², Takumi Kato², Daisuke Nakauchi², Noriaki Kawaguchi², Takayuki Yanagida²

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 Division of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan.

PMID: 36283329
DOI: 10.1016/j.apradiso.2022.110521

Abstract

We synthesized the 0.1, 0.5, 1.0, and 1.5% Ce-doped mullite single crystals by the floating zone method and evaluated their photoluminescence (PL) and thermally stimulated luminescence (TSL) properties. The single-phase orthorhombic structure was confirmed in all the samples from powder X-ray diffraction patterns. The transmittance spectra of all the samples showed the absorption related to the 4f-5d transitions of Ce³⁺ ions and optical band gap of mullite. The Ce-doped mullite single crystals had the PL attributed to the 5d-4f transitions of Ce³⁺ ions. In TSL properties, TSL glow curves had the glow peaks at 250 and 370 °C, and TSL spectra heated at 250 and 370 °C had the peak at around 390 nm owing to the Ce³⁺ ions. TSL dose response functions showed linear response from 0.01 mGy to 10 Gy for the 1.0% Ce-doped mullite single crystal and from 0.1 mGy to 10 Gy for the 0.1, 0.5, and 1.5% Ce-doped ones. The 1.0% Ce-doped mullite single crystal could be used multiple times for dosimetry. In addition, the TSL intensity of the 1.0% Ce-doped mullite single crystal after 7 days from X-ray irradiation was about 82.4% from immediately one after X-ray irradiation.