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Sensors and Materials, Volume 38, Number 2(1) (2026)
Copyright(C) MYU K.K.

pp. 587-592
S&M4326 Research paper
https://doi.org/10.18494/SAM6001
Published: February 6, 2026

Characterization of Radiophotoluminescence Properties of Eu-doped Ca2P2O7 [PDF]

Miho Aoki, Hidehito Nanto, and Go Okada

(Received October 15, 2025; Accepted December 11, 2025)

Keywords: radiophotoluminescence, RPL, Eu, Ca2P2O7, dosimeter

Eu-doped Ca2P2O7 was synthesized by a solid-state reaction method, and its radiophotoluminescence (RPL) properties were evaluated. Upon X-ray irradiation, an emission from Eu2+, which is not present before irradiation, is observed. The latter photoluminescence (PL) intensity around 375–475 nm increases with dose, and the estimated lower detection limit of radiation dose using this signal is approximately 1 Gy. The dose response relationship follows the following equation: Response = 6519.5 Dose0.6. The signal is stable with only about 0.7% of deviation over 20 min after irradiation, indicating high stability. Furthermore, the signal is strongly affected by thermal treatment at high temperatures, which allows the Eu2+ signal to be partially eliminated.

Corresponding author: Miho Aoki

This work is licensed under a Creative Commons Attribution 4.0 International License.

Cite this article
Miho Aoki, Hidehito Nanto, and Go Okada, Characterization of Radiophotoluminescence Properties of Eu-doped Ca2P2O7, Sens. Mater., Vol. 38, No. 2, 2026, p. 587-592.