Mn2+-doped glass scintillators with anti-thermal quenching for high-temperature X-ray imaging

Glass scintillators with high X-ray excited luminescence (XEL) intensity, superior thermal stability, and excellent spatial resolution are expected to be applied in high-temperature X-ray imaging applications.In this study, Mn 2+ -doped fluoroaluminosilicate glass scintillators with excellent scintillating performance and anti-thermal quenching behavior were successfully prepared.The optimal sample has excellent XEL intensity [83.9% of that of commercial Bi 4 Ge 3 O 12 (BGO) scintillators] and good irradiation resistance and reusability.Notably, due to the thermal compensation effect, the optimal sample exhibits anti-thermal quenching behavior (XEL intensity at 393 K is 104% of that at 303 K) and excellent thermal stability (XEL intensity at 573 K maintains 61% of that at 303 K), which has superior thermal stability to that of BGO (XEL intensity at 393 K is 19% of that at 303 K).In addition, the optimal sample is applied to X-ray imaging, and its spatial resolution reaches 20 lp/mm.High-temperature X-ray imaging reveals that imaging clarity enhances with increasing temperature.In summary, Mn 2+ -doped fluoroaluminosilicate glass scintillators exhibit superior high-temperature stability and imaging performance, and provide, to our knowledge, a new type of scintillating material with potential applications in the field of radiation detection.