Radiophotoluminescence properties of silver-doped lithium–aluminum borate glasses

Radiophotoluminescence (RPL) is a phenomenon in which luminescence is emitted from radiation-induced luminescent centers, known as RPL centers. Upon optical excitation, these centers are promoted to excited states and subsequently emit photoluminescence. This property has been utilized in passive dosimetry. However, only a limited number of RPL-active materials have been reported to date, making the development of new materials an important challenge. In this study, we investigated the RPL properties of silver-doped lithium–aluminum borate glasses as a potential novel RPL material. After X-ray irradiation, the glasses exhibited dose-dependent luminescence and characteristic ESR signals, indicating the formation of Ag-related centers. The detectable dose range extended from 53.7 to 1000 Gy. Thermal annealing affected both the luminescence and ESR responses. These results suggest that Ag-doped Li–Al borate glass is a promising candidate for a reusable RPL material. • We investigated the RPL properties of silver-doped lithium–aluminum borate glasses as a potential novel RPL material. • The glass exhibited a broad emission band around 550 nm and showed dose-dependent PL and ESR responses up to 1000 Gy. • ESR spectra revealed signals attributed to Ag 0 , Ag 2 + and BOHC, indicating the formation of multiple silver-related species upon irradiation • Post-irradiation annealing reduced both PL and ESR signals, suggesting thermal instability of the radiation-induced species.