Effects of Na ,M g ,C a ,S r and Ba Doping on the Scintillation Properties of CeBr

The effects of Na ,M g ,C a ,S r and Ba doping on the scintillation properties of CeBr are evaluated in this paper. Ca and Sr doped CeBr show different scintilla- tion properties as compared to undoped CeBr , i.e. an additional perturbed Ce site with emission maxima red-shifted by 30 nm comparedtounperturbedCe sitesasevidencedbyX-rayexcited emissionandphotoluminescencemeasurements.Alsoanearlycon- stant light yield at temperatures below 300 K, an increased decay time and the appearance of multiple glow peaks in thermolumi- nescence measurements are observed for Ca and Sr doped CeBr . These effects on the scintillation properties of CeBr are explained using a single trap model where Br vacancies, formed as charge compensation for the aliovalent dopants, act as electron traps.