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Preparation and characterization of bismuth-filled high-density polyethylene composites for gamma-ray shielding

机译：γ射线屏蔽铋高密度聚乙烯复合材料的制备与表征

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摘要

An attempt has been made to prepare the nonlead-based gamma shielding materials by adding different weight percentages (0%, 10%, 20%, and 40%) of bismuth in high-density polyethylene (HDPE) matrix. Gamma shielding parameters such as linear attenuation coefficient (μ), mass attenuation coefficient (μ_m half-value layer, tenth value layer relaxation length (λ), and percentage attenuation were determined for all synthesized samples using 3"x 3" Nal (Tl) detector for 59.54 keV energy. The results obtained from attenuation studies have shown that the shielding efficiency of synthesized HDPE+Bi composites increases with an increase in the weight percentage of bismuth. The experimentally obtained mass attenuation coefficient values are compared with Monte Carlo simulation using Monte Carlo N-particle code and XCOM code and are in good agreement with each other. The mechanical parameters such as tensile strength, tensile modulus, and elongation at the break were also determined for synthesized composites. Among the prepared composites, HDPE containing 40 wt% of bismuth (HDPE+40% Bi) has shown good radiation shielding property for 59.54 keV gamma rays along with good mechanical properties. Therefore, HDPE+40% Bi can be considered as a better lead-free shielding material for low-energy gamma rays.
机译：尝试通过在高密度聚乙烯（HDPE）基质中添加不同重量百分比（0％，10％，20％和40％）的铋来制备非铅基伽马屏蔽材料。使用3“ x 3” Nal（Tl）确定所有合成样本的伽玛屏蔽参数，例如线性衰减系数（μ），质量衰减系数（μ_m半值层，十分值层弛豫长度（λ）和衰减百分比）衰减研究结果表明，合成的HDPE + Bi复合材料的屏蔽效率随铋的重量百分比的增加而增加，并将实验获得的质量衰减系数值与采用Monte的Monte Carlo模拟进行比较Carlo N-粒子编码和XCOM编码相互吻合，还确定了合成复合材料的力学参数，如拉伸强度，拉伸模量和断裂伸长率，在制备的复合材料中，HDPE的含量为40 wt％的铋（HDPE + 40％Bi）对59.54 keVγ射线具有良好的辐射屏蔽性能，并具有良好的机械性能。因此，HDPE + 40％Bi可以被认为是用于低能伽马射线的更好的无铅屏蔽材料。

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