Ce-doped rare-earth orthosilicate of lutetium and gadolinium, chemical formula Lu_2xGd_2-2xSiO₅:Ce (LGSO:Ce), is a dense, fast scintillation material. It belongs to the family of rare earth silicates, which are known scintillators used in medical equipment, high energy physics, well-logging, x-ray radiography. The energy resolution (6.7–7%) is by 2-4 % better compared to the LSO:Ce and LYSO:Ce analogs. Afterglow in LGSO:Ce is by 2 orders of magnitude lower in comparison with lutetium orthosilicate (LSO:Ce).
Y₂SiO₅:Ce (YSO:Ce) is a bright and fast light scintillator with the emission peaked at 420 nm. The main component of scintillation decay is 45 ns, the contribution of slower component (>100 ns) not exceeds 5 %. Mechanical processing of YSO:Ce and LGSO:Ce scintillators is easier compared to other silicates.