闪烁晶体用高纯无水稀土卤化物的制备与表征

Preparation and Characterization of High Purity Anhydrous Rare Earth Halides for Scintillation Crystal Growth

LaBr3:Ce、LuI3:Ce、SrI2:Eu等新型卤化物闪烁晶体因其高光输出、高能量分辨率等优异的闪烁特性而引起人们的广泛关注。高纯无水稀土卤化物是生长上述闪烁晶体所必需的原料,但其制备困难和高昂成本,严重制约了这些晶体的发展和应用。本文报道了无水LaBr3、CeBr3、LaCl3、CeCl3、LuI3、GdI3、YI3、CeI3、EuI2等常用稀土卤化物的制备方法,并对其有效表征手段进行了介绍。

Novel halide scintillation crystals such as LaBr3∶ Ce,LuI3： Ce and SrI2： Eu have been attracting enormous interests in recent years due to their excellent scintillation properties including high light yield and energy resolution. High purity anhydrous rare earth halides are essential raw materials for crystal growth of these scintillators. However, they are difficult to prepare due to their extremely hygroscopic nature and the high cost of them restrains future development and application of the scintillators. This paper introduces the preparation and characterization of the most oftenly used rare earth halides including LaBr3,CeBr3,LaCl3,CeCl3,Lu I3,GdI3,YI3,CeI3 and EuI2.