Scintillation Properties of ${\rm Ce}^{3+}$ - and ${\rm \Pr}^{3+}$ -Doped LuAG, YAG and Mixed

We summarize the latest R&D state-of-art of Ce³⁺ and Pr³⁺-doped mixed (Lu_xY_1-x)₃Al₅O₁₂ (LuYAG) garnet scintillator crystals and compare their properties with those of Lu₃Al₅O₁₂ (LuAG) and Y₃Al₅O₁₂ (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 Ce³⁺ -doped LuAG crystals while up to 17000 ph/MeV was measured in the Pr³⁺-doped ones. On the contrary, the energy resolution and proportionality are noticeably better in the Pr³⁺ -doped crystals. Mixed Ce³⁺- or Pr³⁺-doped Lu_xY_1-xAG (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.