The preparation and characterization of silicon-based composites doped with BaSO4, WO3, and PbO nanoparticles for shielding applications in PET and nuclear medicine facilities

IF 1.4 Q4 NANOSCIENCE & NANOTECHNOLOGY
R. Malekzadeh, Vahid Sadeghi Zali, O. Jahanbakhsh, M. Okutan, A. Mesbahi
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引用次数: 11

Abstract

Objective(s): The present study aimed to design new nanoparticle-based shielding materials for photons used in single-photon emission computed tomography and positron emission tomography facilities. Materials and Methods: Initially, the mass attenuation coefficients and half value layer (HVL) of the composites were comprehensively investigated based on a silicon rubber containing various ratios of micro- and nano-barium sulfate (BaSO4), lead oxide (PbO), and tungsten oxide (WO3) particles at 60, 80, 100, 150, 200, 300, 400, 500, and 600 keV photon energies using the MCNP-X6 Monte Carlo (MC) code and WinXCOM software. In the second stage, the composites composed of 10 wt% and 20 wt% WO3 and PbO particles were constructed in a liquid silicone rubber-based matrix. The mass attenuation coefficients and HVL of the designed shields were experimentally assessed using Cs-137 and Am-241 radioactive sources.Results: The particles sizes of PbO and WO3 were within the range of 50-200 nanometers. The MC and measurement results indicated that the linear attenuation coefficients of the composites were augmented with the addition of all the studied nano- and micro-particles. However, the PbO composites had more significant shielding properties compared to the BaSO4 and WO3 composites. Conclusion: According to the results, the nanocomposites had better ability to shield γ-rays at both energies compared to the micro-composites.
掺杂BaSO4、WO3和PbO纳米颗粒的硅基复合材料的制备和表征,用于PET和核医学设施的屏蔽
目的:本研究旨在设计用于单光子发射计算机断层扫描和正电子发射断层扫描设备的新型纳米粒子光子屏蔽材料。材料与方法:首先,利用MCNP-X6蒙特卡罗(MC)程序和WinXCOM软件,在含有不同比例的微/纳米硫酸钡(BaSO4)、氧化铅(PbO)和氧化钨(WO3)粒子的硅橡胶中,对60、80、100、150、200、300、400、500和600 keV光子能量下复合材料的质量衰减系数和半值层(HVL)进行了全面研究。在第二阶段,在液态硅橡胶基基体中构建由10% wt%和20% wt% WO3和PbO颗粒组成的复合材料。采用Cs-137和Am-241放射源对设计的屏蔽层的质量衰减系数和HVL进行了实验评估。结果:PbO和WO3的粒径在50 ~ 200纳米之间。MC和测量结果表明,复合材料的线性衰减系数随着所研究的纳米和微粒子的加入而增大。然而,与BaSO4和WO3复合材料相比,PbO复合材料具有更显著的屏蔽性能。结论:纳米复合材料对两种能量的γ射线的屏蔽能力均优于微复合材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nanomedicine Journal
Nanomedicine Journal NANOSCIENCE & NANOTECHNOLOGY-
CiteScore
3.40
自引率
0.00%
发文量
0
审稿时长
12 weeks
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