Luminescence and scintillation characterizations of cerium doped Cs ₂LiGdBr₆ single crystal

We report on the luminescence and scintillation characterizations of cerium doped Cs₂LiGdBr₆ (CLGB) single crystal. This is a new scintillation material and belongs to elpasolite family. Single crystals of CLGB: Ce³⁺ with dimensions up to â̂...10×5 mm ³ are successfully grown by the Bridgman technique. Under X-ray excitation, broad emission band between 370 to 478 nm wavelengths is obtained. Such emission is attributed to the cerium ion. At 662 keV γ-rays CLGB: Ce³⁺ shows energy resolutions of 7.1%, 9.4%, and 8.6% (FWHM) at 1%, 5%, and 10% Ce-concentrations, respectively. Light yield of CLGB depends on cerium concentration and maximum light yield of ~30,500 ph/MeV is measured for 10% Ce sample crystal. Under γ-ray excitation, CLGB: Ce³⁺ crystals showed three exponential decay time components.