It discusses the use of narrow - beam single - energy γ - ray absorption coefficient determination unit to determine the aggregate experimental shielding performance. To reduce the heterogeneity of the aggregate im pact of the measurement results, the design may be making a multi - point and a measuring device to improve the repeatability of results. So the relative error can remain about 1% . Finally, experiments are shielded by the materials of the best ratio, so as to provide the theoretical basis for this new anti - radiation materials which add sludges of heavy metals .%讨论了利用窄束单能装置测定γ射线吸收系数实验来测定集料的屏蔽性能.为了减少集料不均匀性对测量结果的影响,设计制作了一台可多点及重复测量的装置来改善实验结果,使测量的相对误差控制在1％左右.通过实验,可以得到屏蔽性最佳的集料配比,从而为添加含重金属污泥添加剂的新型防辐材料提供抗辐射性能评价依据.
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