Abstract
xCeF3-doped (30-x)SrF2-20Al2O3-50B2O3 glasses (x = 0.1, 1.0, 5.0 and 10 mol%) were synthesized by the conventional melt quenching method, and then characterizations for scintillator applications were performed. Regarding the photoluminescence (PL) properties, the glasses show a broad emission band around 360 nm under excitation of approximately 325 nm, and the decay time constant is several tens of nano-seconds. From the results, the origin is attributed to the 5d → 4f transitions of Ce3+. As scintillation properties, the X-ray induced scintillation spectra and decay time constants are reasonably consistent with the PL. Among the present glass samples, the scintillation intensity is the highest when doped with 1% Ce. The light yields of the 1% Ce-doped glass shows 240 photons/MeV under 57Co 122 keV γ-ray exposure. The light yields were derived as relative values to that of commercial GS20 glass scintillator. This is the first report on the scintillation light yields of Ce-doped SrF2-Al2O3-B2O3 glasses. Furthermore, the materials also exhibit thermally stimulated luminescence (TSL) properties with a major glow peak around 80 °C, and the sensitivity to radiation dose is as low as 0.1 mGy for the 0.1% and 1.0% Ce-doped glasses with a good linearity confirmed to 100 mGy.
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