Unraveling the Critical Role of Site Occupancy of Lithium Codopants in LuSiO:Ce Single-Crystalline Scintillators.

Lithium codoping has emerged as an effective strategy to enhance the light yield of oxide scintillators for radiation detection applications, but the understanding of the actual role played by Li remains unclear. In this work, we comprehensively study the effects of Li codoping on optical and scintillation properties of LuSiO:Ce (LSO:Ce) single crystals and reveal the critical role of site occupancy of Li. High-quality LSO:Ce single crystals codoped with 0.