Large size single crystal growth of Lu3Al5O12:Pr and their uniformity of scintillation properties

Pr-doped Lu3Al5O12 (Pr:LuAG) single crystals were grown by the Czochralski method. The crystal was seeded-grown in the [100] direction. Dimensions up to 100 mm in length and 92 mm in diameter were achieved without cracking. Using 10×10×10 mm size sample coupled with photomultiplier (Hamamatsu R3998), energy resolution of 4.6% at 662 keV was achieved. Uniformity of light yield and energy resolution was also evaluated in whole crystal. The deviations of light output, energy resolution, and decay time were ±7.9%, 7.2%, and 4.8%, respectively.

► 92 mmϕ Pr:LuAG single crystal was grown by the Czochralski method.
► Energy resolution of 4.6% at 662 keV was achieved.
► Uniformity of light yield and decay time were also evaluated in whole crystal.
► Deviations of light output and decay time were ±7.9%, and 4.8%, respectively.
► We could established the growth technology of Pr:LuAG with uniform properties.