Positron-induced Radiophotoluminescence in Ag-doped Glasses

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)699-705
Number of pages7
JournalSensors and Materials
Issue number2
Publication statusPublished - 2022
Externally publishedYes


  • Electron spin resonance
  • Glass
  • Positron
  • Radiophotoluminescence
  • Silver

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation


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