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

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Sensors and Materials, Volume 34, Number 2(2) (2022)
Copyright(C) MYU K.K.
pp. 699-705
S&M2844 Research Paper of Special Issue
Published: February 21, 2022

Positron-induced Radiophotoluminescence in Ag-doped Glasses [PDF]

Hirokazu Masai, Yuka Yanagida, Hiroki Kawamoto, Yasuhiro Koguchi, Masanori Koshimizu, and Masato Yamawaki

(Received October 13, 2021; Accepted November 30, 2021)

Keywords: positron, glass, silver, radiophotoluminescence, electron spin resonance

Positron annihilation spectroscopy (PAS) is used for the quantification of cavities in a matrix. Although PAS is sometimes considered a nondestructive measurement method, it is worth investigating the interaction of positrons with the matrix during PAS. Here, we have demonstrated that defects are generated in silver-doped phosphate glasses during positron annihilation measurement and that radiophotoluminescence (RPL) is observed after irradiation. There is a linear correlation between the irradiation duration and the observed RPL intensity of the glasses. We observed RPL after a high irradiation dose even after conventional thermal annealing at 360 °C for 1 h. The formation of Ag2+ species detectable by electron spin resonance (ESR) was confirmed. From the concentration of ESR-active Ag2+ and Ag2+ species, it is expected that approximately 0.1% of Ag+ cations were changed after 5 days of positron irradiation.

Corresponding author: Hirokazu Masai

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Cite this article
Hirokazu Masai, Yuka Yanagida, Hiroki Kawamoto, Yasuhiro Koguchi, Masanori Koshimizu, and Masato Yamawaki, Positron-induced Radiophotoluminescence in Ag-doped Glasses, Sens. Mater., Vol. 34, No. 2, 2022, p. 699-705.

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