Fig. 1. (a) XRD patterns of all specimens; (b) FT-IR spectra of G-host and G-6Tb specimens.

Fig. 2. (a) Transmittance spectra of all samples; (b) relationship between α² and hν for G-host and G-6Tb samples.

Fig. 3. Photos of all samples (a) under daylight and (b) under 365 nm light irradiation.

Fig. 4. (a) PL spectra (λ_ex = 378 nm) of all samples; (b) PLE spectra (λ_em = 542 nm) of all samples.

Fig. 5. (a) IQE spectra of G-xTb specimens; (b) decay curves (λ_ex = 378 nm) of 542 nm emission of G-xTb specimens.

Fig. 6. (a) XEL spectra of BGO crystal and G-xTb specimens; (b) relationship between XEL intensity and X-ray dose rate.

Fig. 7. Photos of G-6Tb sample for (a) X-ray imaging, (c) encapsulated chip, (e) ballpoint pen, and (g) standard X-ray test pattern plate; X-ray images of (b) sample, (d) encapsulated chip, (f) ballpoint pen, and (h) standard X-ray test pattern plate.

Fig. 8. Mechanism of Tb³⁺-doped BSG scintillators.

Fig. 9. (a) Transmittance spectra of G-6Tb sample before radiation, after being irradiated by X rays with different input powers for 5 min, and after subsequent heat treatment; inset (i) is photo of G-6Tb sample after X-ray irradiation (10 W, A-I) and inset (ii) is photo of G-6Tb sample after subsequent heat treatment (H-T); (b) transmittance spectra of G-6Tb sample before irradiation, after X-ray irradiation (10 W), and their difference.

Fig. 10. (a) XEL spectra of G-6Tb specimen with different X-ray irradiation time (7 W); (b) relative XEL intensity of G-6Tb sample after different irradiation time; (c) transmittance spectra of G-6Tb sample before irradiation, after 100 min X-ray irradiation, and their difference.