Samy A. Dwidar, Wageeh Ramadan, Mohamed Soliman, A. M. Abdelmonem
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Detailed analysis of gamma-shielding characteristics of poly methyl methacrylate reinforced with micro/nano zirconium oxide and tungsten carbide
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.
期刊介绍：
An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.
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