期刊
MATERIALS
卷 15, 期 18, 页码 -出版社
MDPI
DOI: 10.3390/ma15186201
关键词
gamma-rays; nanoparticles; epoxy; MgO; attenuation coefficient; particle size effect
类别
资金
- Princess Nourah bint Abdulrahman University Researchers Supporting Project, princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia [PNURSP2022R111]
The study investigated the impact of introducing micro- and nanoparticle MgO as a filler into epoxy resin on the radiation shielding abilities of the samples. The results showed that nanoparticle MgO was more effective in shielding against incoming radiation than microparticle MgO, and smaller particles enhanced the shielding ability of the samples against radiation.
The aim of the current study is to investigate the impact of introducing micro- and nanoparticle MgO as a filler into epoxy resin on the radiation shielding abilities of the prepared samples. To this end, we performed a gamma-radiation spectroscopy experiment with the help of an HPGe detector and Am-241, Cs-137, and Co-60 sources. We evaluated the particle size effect (PSE) and detected the maximum PSE value with the addition of 50 wt% MgO particles, indicating that nanoparticle MgO was more successful in shielding against incoming radiation than microparticle MgO. We compared the half-value layer (HVL) for the samples with 10 wt%, 20 wt%, and 30 wt % micro-MgO and nano-MgO and found that the HVL values were lower for the nanoparticle samples than for the microparticles samples, confirming that smaller particle sizes enhanced the shielding ability of the samples against radiation. The MFP results showed that epoxy matrices containing micro-MgO, for all investigated energies, resulted in higher MFP values that those containing nano-MgO.
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