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<p>This research analyzes polymeric composites based on polymethyl methacrylate loaded with micro/nano particles of zirconium oxide (ZrO<sub>2</sub>) and tungsten carbide (WC) for gamma-ray protection. The PMMA matrix was reinforced with 15%, 30%, and 45% ZrO<sub>2</sub> and 20%, 40%, and 60% WC. An assessment employed <sup>137</sup>Cs, <sup>60</sup>Co, and <sup>152</sup>Eu point gamma sources using a NaI(Tl) detector. Key parameters—including the linear attenuation coefficient (LAC), half value layer (HVL), effective atomic number (Z<sub>eff</sub>), specific gamma constant (GC), gamma dose rate (Dr)were analyzed across a wide energy range (0.015–15&#xa0;MeV). Additionally, the relative KERMA (K<sub>air</sub>) in air was calculated using PAGEX software over a broad energy range varied from 0.0015 to 20&#xa0;MeV. Measured LAC values reasonable agreement with that calculated by Phy-X/PSD software. Notably, the composite with 60 wt% nano WC provided the most effective gamma-ray attenuation, outperforming ZrO<sub>2</sub> at similar loadings.</p>

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Detailed analysis of gamma-shielding characteristics of poly methyl methacrylate reinforced with micro/nano zirconium oxide and tungsten carbide

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Samy A. Dwidar,
  • Wageeh Ramadan,
  • Mohamed Soliman,
  • A. M. Abdelmonem

摘要

This research analyzes polymeric composites based on polymethyl methacrylate loaded with micro/nano particles of zirconium oxide (ZrO2) and tungsten carbide (WC) for gamma-ray protection. The PMMA matrix was reinforced with 15%, 30%, and 45% ZrO2 and 20%, 40%, and 60% WC. An assessment employed 137Cs, 60Co, and 152Eu point gamma sources using a NaI(Tl) detector. Key parameters—including the linear attenuation coefficient (LAC), half value layer (HVL), effective atomic number (Zeff), specific gamma constant (GC), gamma dose rate (Dr)were analyzed across a wide energy range (0.015–15 MeV). Additionally, the relative KERMA (Kair) in air was calculated using PAGEX software over a broad energy range varied from 0.0015 to 20 MeV. Measured LAC values reasonable agreement with that calculated by Phy-X/PSD software. Notably, the composite with 60 wt% nano WC provided the most effective gamma-ray attenuation, outperforming ZrO2 at similar loadings.