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用表面处理稀土氧化物Er2O3的方法制备了Er2O3/环氧树脂辐射防护材料。采用X射线衍射仪(XRD),扫描电镜(SEM),能量色散型X射线能谱仪(EDAX)等方法研究了材料的微观结构;对材料的力学性能进行了测试和分析;用多道γ谱仪和GammaVision软件测试并分析了材料的辐射防护能力;运用基于蒙特卡罗方法的EGSnrc程序模拟了射线在材料中的输运过程,讨论了射线通过材料前后注量的变化。结果表明,制得的材料致密无间隙,Er2O3粒子在材料中分布均匀,力学性能得到了改善,材料防护射线的效果明显,稀土元素Er防护低能射线的能力强于传统的屏蔽元素Pb。
Er2O3 / epoxy radiation protection material was prepared by surface treatment of rare earth oxide Er2O3. The microstructure of the material was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray photoelectron spectroscopy (EDAX). The mechanical properties of the material were tested and analyzed. Spectrometer and GammaVision software were used to test and analyze the radiation protection ability of the material. The EGSnrc program based on Monte Carlo method was used to simulate the transport of the radiation in the material. The changes of the fluence before and after the radiation was discussed. The results show that the prepared material is dense and without gaps. The Er2O3 particles distribute uniformly in the material and the mechanical properties are improved. The protective effect of the material is obvious. The ability of the rare earth element Er to protect the low energy ray is stronger than that of the traditional shielding element Pb.