ArticleScientific reports2025
A Monte Carlo simulation of gamma-ray backscattering from concrete shields coated with nanoparticle layers.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In recent years, nanocomposite shields have emerged as a promising alternative to conventional lead ones, with rapidly growing applications in medical and industrial sectors. Although the scattering characteristics of nanocomposite shielding materials have been widely investigated, their backscattering behavior remains unexplored in scientific studies. Therefore, obtaining accurate measurements of gamma photon backscattering is essential for evaluating the effectiveness of nanomaterials in radiation shielding. This study investigates the influence of nanoparticles on gamma photon backscattering in low-density polyethylene (LDPE)-based composite radiation shields, using Monte Carlo simulations. Following the validation with available experimental and simulation results, the photon backscattering of LDPE composites doped with W, Ti, Zn, Pb, and Bi particles layered over concrete were analyzed at weight percentages (wt%) of 5%, 10%, 15%, and 20%, and particle sizes ranging from bulk and microscale (10 µm) to nanoscale (100 nm) via the MCNPX code. For comparison purposes, the reflection coefficient (RC) was calculated for 0.1-15 MeV gamma-rays at reflection angles of 92° to 165
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