Near-infrared scintillation properties of Nd-doped CaYAl3O7 single crystals

Akihiro Nishikawa; Kensei Ichiba; Takumi Kato; Daisuke Nakauchi; Noriaki Kawaguchi; Takayuki Yanagida

doi:10.1016/j.apradiso.2024.111559

Near-infrared scintillation properties of Nd-doped CaYAl₃O₇ single crystals

Appl Radiat Isot. 2024 Dec:214:111559. doi: 10.1016/j.apradiso.2024.111559. Epub 2024 Oct 22.

Authors

Akihiro Nishikawa¹, Kensei Ichiba², Takumi Kato², Daisuke Nakauchi², Noriaki Kawaguchi², Takayuki Yanagida²

Affiliations

¹ Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan. Electronic address: nishikawa.akihiro.nc6@ms.naist.jp.
² Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan.

PMID: 39454299
DOI: 10.1016/j.apradiso.2024.111559

Abstract

We prepared Nd-doped CaYAl₃O₇ single crystals with different Nd concentrations of 0.1, 0.5, 1.0, 5.0, 10, and 20% by the floating zone method. Photoluminescence (PL) and scintillation properties of all the samples were investigated, and the performance as near-infrared (NIR) scintillators was evaluated. All the samples exhibited some luminescence peaks of 4f-4f transitions of Nd³⁺ in PL and scintillation spectra at around 890, 1060, and 1300 nm. The 5.0% Nd-doped sample showed the highest PL quantum yield of 49.5%. In addition, the 5.0% Nd-doped sample had the highest scintillation intensity under X-ray irradiation among the samples, and the lowest detectable dose rate was 0.001 Gy/h.