Scintillation properties of LuI3:Ce

Abstract Lutetium iodide (LuI 3 ) is a new addition to the family of Ce-doped lanthanide trihalide scintillating materials. Crystals of this material show hexagonal structure with density of 5.6 g/cm 3 and have been grown by the Bridgman method. Under X-ray excitation this material exhibits broad, cerium based emission that peaks at 475 and 520 nm. The fastest and major component of scintillation time profile of LuI 3 :Ce emission decays with a 31 ns time constant. The light yield of LuI 3 :Ce for thin samples (∼0.2 mm) was estimated to be ∼50,000 photons/MeV.