ANALYSIS THE CHARACTERIZATION OF SCINTILLATION AND CRYSTAL GROWTH OF HALIDES

For X-ray and -ray detector applications, Elpasolite halides scintillation crystals have shown to be critical materials. This family of Chloro-elpasolite crystals includes Cs2KLaCl6:4 percentCe (CKLC) and Cs2KCeCl6 (CKCC), both of which exhibit new scintillation characteristics. We describe the use of vertical Bridgman techniques to grow CKLC and CKCC crystals. The PXRD patterns show that both crystals have a cubic crystal structure, as shown by the shapes. In terms of their photoluminescence excitation and emission spectrum, the fluorescence decay time of the CKLC and CKCC crystals was about 49.7 and 33.8 ns, respectively, for these two types of crystals. It was found that the 662 keV -rays that were excited by the source 137Cs had an energy resolution of 6.6 percent and 5.2 percent. Scintillation decay times for CKLC crystal were 33 percent slower than for CKCC crystal and 67 percent slower than for the latter. The former's were only 5 percent slower and only 81 nanoseconds slower (95 percent ).