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Vol. 32, No. 8(2), S&M2292

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Sensors and Materials, Volume 37, Number 2(1) (2025)
Copyright(C) MYU K.K.
pp. 533-538
S&M3929 Research Paper of Special Issue
https://doi.org/10.18494/SAM5440
Published: February 7, 2025

Radiophotoluminescence Properties of Bi-doped CaBPO5 [PDF]

Go Okada, Caroline Paschoal Fernandes, Hirozumi Ito, Yasuhiro Koguchi, Satoshi Ueno, Chiaki Sawai, Wataru Kada, Kenichi Watanabe, Kiyomitsu Shinsho, and Hidehito Nanto

(Received October 31, 2024; Accepted December 26, 2024)

Keywords: radiophotoluminescence, RPL, bismuth, Bi, CaBPO5

Bi-doped CaBPO5 was synthesized by the solid-state reaction method, and its radiophotoluminescence (RPL) properties were subsequently examined. Steady-state photoluminescence (PL) studies suggest that Bi2+ ions are generated upon X-ray irradiation, resulting in a PL emission band with a peak at 630 nm. The RPL-related PL signal is unstable at room temperature, decreasing to approximately 50% of its initial intensity within 20 min. Heat treatment accelerates the signal decay, with the signal minimized after heating to 500 ℃. Following signal erasure via heat treatment at 500 ℃, the material sensitivity to X-ray irradiation shows a slight increase with repeated cycles, rising by approximately 40% of the original sensitivity after 10 cycles.

Corresponding author: Go Okada


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Cite this article
Go Okada, Caroline Paschoal Fernandes, Hirozumi Ito, Yasuhiro Koguchi, Satoshi Ueno, Chiaki Sawai, Wataru Kada, Kenichi Watanabe, Kiyomitsu Shinsho, and Hidehito Nanto, Radiophotoluminescence Properties of Bi-doped CaBPO5, Sens. Mater., Vol. 37, No. 2, 2025, p. 533-538.



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