Abstract
For the first time, transparent nanostructured polycrystalline scintillators were fabricated by sintering nanoparticle powders at high temperatures and their scintillation properties are reported. is a host material that has never been investigated as scintillators for radiation detection. Our observations found that has an intense scintillation luminescence, a detection efficiency higher than that of YAG:Ce and a comparable energy resolution to NaI and CsI scintillators. In addition, is stable and has luminescence decay lifetime in the picosecond range which is favorable for radiation detection. The luminescence of has a large Stokes-shift and a large emission bandwidth, and the luminescence is highly temperature dependent. Different from most doped scintillators, the luminescence of is most likely from the self-trapped excitons. The discovery of scintillators opens a new door for the research of new materials for radiation detection.
© 2014 Optical Society of America
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