柔性硅基聚合物-钨复合材料γ射线屏蔽性能研究

Research ofγ-Ray Shielding Properties of Flexible Silicon-Based Polymer-Tungsten Composite Materials

利用^(60)Co和^(137)Cs放射源对含钨量为0%,79.74%,92.12%,95.2%的柔性硅基聚合物-钨复合材料进行了γ射线屏蔽性能测试,得出了线性衰减系数、半值层信息;采用MC方法对该类复合材料的屏蔽性能进行了模拟分析,并与实验结果进行了比较.结论:(1)柔性硅基聚合物-钨复合材料对γ射线屏蔽性能随着含钨量的增加而增强,含钨量相同时,更易于屏蔽低能γ射线;(2)含钨量为92.12%、95.2%的柔性硅基聚合物-钨复合材料屏蔽性能介于铁和铅之间,均优于当前新型钨橡胶材料;(3)实验测量与MC计算结果偏差小于5.2%,能够较好符合,说明采用MC模拟方法代替实验方法开展新材料屏蔽性能研究是一种经济有效的途径,能促进新型屏蔽材料的研究进度.

The flexible silicon-based polymer-tungsten composite with tungsten content(0%,79.74%,92.12%,95.2%)were tested by using^(60)Co and^(137)Cs radioactive sources in laboratory respectively.Gives out the linear attenuation coefficient,half value layer information of each flexible silicon-based polymertungsten composite.On the other hand,the shielding properties of flexible silicon-based polymer-tungsten composites were simulated by using MC method.The result shows:(1)The shielding performance of flexible silicon-based polymer-tungsten composites to rays increases with the increase of tungsten content,and it is easier to shield low-energyγrays.(2)The shielding properties of flexible silicon-based polymertungsten composites with tungsten content(92.12%,95.2%)are between lead and iron,and superior to the current T-Flex composites.(3)The deviation between The experimental test results and MC simulation results is less than 5.2%,which means the results of MC simulation are reliable.Use MC simulation method instead of experimental method to study the shielding properties of new materials.This method is not only economical and effective,but also can promote the research progress of new shielding materials.