Abstract: Single crystals of SrI2∶Eu∶Cs with sizes up to Φ25 mm×70 mm were successfully grew in evacuated quartz ampoules via the Bridgman technique using the domestic raw materials. A transparent and crackless 10 mm×10 mm×10 mm SrI2∶Eu∶Cs single crystal was machined.The XRD results proved that the crystal was SrI2 orthogonal phase and the space group was Pbca. Fluorescence spectra showed that the emission and excitation peaks of the crystals were at 440 nm and 419 nm, respectively, ascribed to 5d→4f transition of Eu2+. The X-ray excited emission spectra showed that SrI2∶Eu∶Cs presented one peak at 440 nm. The decay time, under 370 nm excitation, was found to be about 1.3 μs. The energy resolutions was 5.5% under 137Cs gamma rays. This crystal already satisfies some application needs.
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2018, Vol. 32 
