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![]() ![]() This work is licensed under a Creative Commons Attribution 4.0 International License. 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. |