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分别以黄色和蓝色氧化钨微粉为细集料,采用水泥基集料掺混方法制备了?10.5 cm×6.0 cm规格圆柱形样品,并通过PTW UNDOS标准计量仪和~(60)Co-γ、~(137)Cs-γ源组成的实验系统测试了材料对1.25,0.66 MeV射线的屏蔽性能。结果表明:同样6 cm厚度规格,普通样品~(60)Co-γ射线穿透率为54.3%,~(137)Cs-γ射线穿透率为42.5%;而掺混体积分数为30%黄色氧化钨样品的~(60)Co-γ射线穿透率下降为37.0%,~(137)Cs-γ射线穿透率下降为26.9%;掺混体积分数为20%蓝色氧化钨样品的~(60)Co-γ穿透率则下降为41.5%,~(137)Cs-γ射线穿透率下降为29.7%。因此,掺加氧化钨可以增强水泥基材料对γ射线的屏蔽性能。
The samples of 10.5 cm × 6.0 cm cylindrical samples were prepared by the cement-based aggregate mixing method using yellow and blue tungsten oxide powders as fine aggregate respectively. The samples were characterized by PTW UNDOS standard meter and ~ (60) Co-γ , ~ (137) Cs-γ source was used to test the shielding properties of the materials at 1.25,0.66 MeV. The results show that the same 6 cm thickness of Co-γ ray of ~ (60) Co (superscript +) is 54.3% and that of 137 Cs-γ ray is 42.5% The γ-ray transmittance of ~ (60) Co-γ reduced to 37.0% and that of ~ (137) Cs-γ decreased to 26.9% for tungsten oxide samples; (60) Co-γ transmittance decreased to 41.5%, ~ (137) Cs-γ ray transmittance decreased to 29.7%. Therefore, the incorporation of tungsten oxide can enhance the shielding performance of cement-based materials on γ-rays.