Scintillation Properties of ${\rm Ce}^{3+}$- and ${\rm Pr}^{3+}$-Doped LuAG, YAG and Mixed ${\rm Lu}_{\rm x}{\rm Y}_{1-{\rm x}}{\rm AG}$ Garnet Crystals

We summarize the latest R&D state-of-art of Ce
³⁺
and Pr
³⁺
-doped mixed (Lu
_x
Y
_1-x
)
₃
Al
₅
O
₁₂
(LuYAG) garnet scintillator crystals and compare their properties with those of Lu
₃
Al
₅
O
₁₂
(LuAG) and Y
₃
Al
₅
O
₁₂
(YAG) single crystal analogues. Light yield, energy resolution and proportionality were studied under radioisotope excitation within 8-1300 keV energy range. The highest light yield of about 27000 ph/MeV is obtained in the newest prepared Ce
³⁺
-doped LuAG crystals while up to 17000 ph/MeV was measured in the Pr
³⁺
-doped ones. On the contrary, the energy resolution and proportionality are noticeably better in the Pr
³⁺
-doped crystals. Mixed Ce
³⁺
- or Pr
³⁺
-doped Lu
_x
Y
_1-x
AG (x=0.9-1) crystals show comparable light yield and energy resolution compared to those doped pure LuAG, but the content of slow components in scintillation pulses lower.