Polyethylene composite doped with cadmium and tungsten oxide for neutron-gamma multilayer shielding

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2024-12-31 DOI:10.1016/j.radphyschem.2024.112506

Chin Lok Sheng, Muhammad Arif Sazali, Asyraf Arif Abu Bakar, Ahmad Hambali Ismail, Roslan Yahya, Muhammad Syahir Sarkawi, Nur Syazwani Mohd Ali, Khairulnadzmi Jamaluddin

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引用次数: 0

Abstract

Radiation shielding is crucial to ensuring the safety of the people and the environment. Concrete and lead are common materials with great shielding properties against gamma and neutron radiation, yet they have drawbacks such as being harmful to human health, high cost, and seismic vulnerability. Therefore, the aim of this study is to develop polyethylene (PE)-based composites doped with cadmium (Cd) and tungsten oxide (WO3), to determine the neutron-gamma shielding properties of the composites, and to compare the radiation shielding performance of multilayer shielding of the composites and the base PE. The composites were fabricated using the melt-mixing and hot-pressing methods. They were characterized using X-ray diffraction, micro-computed tomography scanning, and field emission scanning electron microscopy to observe the dispersion of filler particles in the PE matrix. Results show that the filler elements have good distribution in the composite. Their shielding performance was evaluated using the 241Am/Be neutron and 137Cs gamma sources at the Malaysian Nuclear Agency. The results show that the PE+20% WO3 has the highest values of neutron removal macroscopic cross-section and gamma linear attenuation coefficient for single-layer shielding. For multilayer configuration, PE+10%Cd with PE+10% WO3 (Cd10/W10) has the best mixed neutron-gamma radiation attenuation performance. The results will help in the development of alternative materials for better radiation protection.

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掺杂镉和氧化钨的聚乙烯复合材料用于中子- γ多层屏蔽

辐射屏蔽是保障人类和环境安全的关键。混凝土和铅是常见的材料，对伽马和中子辐射具有良好的屏蔽性能，但它们存在对人体健康有害、成本高、易受地震影响等缺点。因此，本研究的目的是研制掺杂镉（Cd）和氧化钨（WO3）的聚乙烯（PE）基复合材料，确定复合材料的中子- γ屏蔽性能，并比较复合材料多层屏蔽与基PE的辐射屏蔽性能。采用熔融混合和热压法制备了复合材料。利用x射线衍射、微计算机断层扫描和场发射扫描电镜对其进行了表征，观察了填料颗粒在PE基体中的分散情况。结果表明，填充元素在复合材料中分布良好。在马来西亚原子能机构使用241Am/Be中子和137Cs伽马源评估了它们的屏蔽性能。结果表明，PE+20% WO3具有最高的单层屏蔽中子去除宏观截面和γ线性衰减系数；对于多层结构，PE+10% cd和PE+10% WO3 （Cd10/W10）具有最佳的混合中子-伽马辐射衰减性能。研究结果将有助于开发更好的辐射防护替代材料。

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

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.