Fyzikální ústav Akademie věd ČR

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.

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

¹Institute of Physics AS CR, Cukrovarnicka 10, 16253 Prague, Czech Republic
² New Industry Creation Hatchery Center (NICHe), Tohoku University, 6-6-10 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, Japan
³ Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19 Prague, Czech Republic
⁴ Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577 Japan