Defect Engineering in Ce-Doped Aluminum Garnet Single Crystal Scintillators

Mg-codoped Lu₃Al₅O₁₂:Ce single crystal garnet scintillators were prepared with a wide concentration range 0–3000 ppm of Mg²⁺. Luminescence and scintillation characteristics were measured revealing the beneficial effect of Mg codoping which consists in stabilization of Ce⁴⁺ center. We propose a model explaining the mechanism of material improvement; the stable Ce⁴⁺ center provides an additional fast radiative recombination pathway in the scintillation mechanism. 

Description

Monocrystals prepared by "micropulling-down" method with marked level of Mg2+ additional dose.