In this work, the effect of the particle size range on dimethylpolysiloxane (DMPS) on the attenuation properties was investigated. The control sample was prepared consisting of 50% DMPS+50% BiO-MPs and referred (DMPS-BiO). Microparticles (MPs) were gradually replaced by Nanoparticles (NPs) to fabricate five samples coded by (DMPS-BiO), (DMPS-BiO), (DMPS-BiO), (DMPS-BiO), (DMPS-BiO), and (DMPS-BiO). The LAC “Linear attenuation coefficient” was determined at different energies including low and high energies for all prepared composites using an experimental gamma ray measurements and acquisition system. The HPGe detector and various point sources (Co, Cs and Am) was used in the experimental technique. The LAC of control sample was evaluated by XCOM-software and compared to the experimental values to verify the accuracy of the experimental results. The other attenuator parameters (Half (HVL) and Tenth (TVL) value layer and mean free path (MFP) as well as Radiation shielding efficiency (RSE)) have been calculated. The highest LAC of the prepared polymer composites was (DMPS-BiO) while the lowest LAC observed for control sample (DMPS-BiO) at all discussed energies. The HVL of (DMPS-BiO) < (DMPS-BiO) (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) at all discussed experimental energies.

中文翻译：

---

探索 Bi2O3 粒径对二甲基聚硅氧烷在医用伽马/X 射线屏蔽应用中的功效的影响

在这项工作中，研究了二甲基聚硅氧烷（DMPS）的粒径范围对衰减特性的影响。对照样品由 50% DMPS+50% BiO-MP 和参考 (DMPS-BiO) 组成。微米颗粒（MP）逐渐被纳米颗粒（NP）取代，以制造五个样品，编码为（DMPS-BiO）、（DMPS-BiO）、（DMPS-BiO）、（DMPS-BiO）、（DMPS-BiO）和（ DMPS-Bi2O）。使用实验伽马射线测量和采集系统在不同能量（包括低能和高能）下确定所有制备的复合材料的 LAC“线性衰减系数”。实验技术中使用了 HPGe 探测器和各种点源（Co、Cs 和 Am）。通过XCOM软件对对照样品的LAC进行评估，并与实验值进行比较，验证实验结果的准确性。其他衰减器参数（半值层 (HVL) 和第十值层 (TVL) 以及平均自由程 (MFP) 以及辐射屏蔽效率 (RSE)）均已计算。所制备的聚合物复合材料的最高 LAC 为 (DMPS-Bi2O)，而在所有讨论的能量下，对照样品 (DMPS-Bi2O) 观察到的最低 LAC。 (DMPS-BiO) < (DMPS-BiO) (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) < (DMPS-BiO) 在所有讨论的实验能量下的 HVL。