Radiation attenuation properties of shields containing micro and Nano WO3 in diagnostic X-ray energy range

Design and fabrication of high density borated polyethylene nanocomposites as a neutron shield

“…The results of our previous investigations on photon shielding showed that using nano-sized materials in radiation shielding can provide better attenuation results only in very speci#ic circumstances (such a limited range of photon energy, or a limited concentration of nanomaterials in the matrix). It is worth mentioning that according to the results obtained in our previous study the smaller size of nano-structured WO3 particles could guarantee a better radiation shielding property only for low energy photons (13) .…”

“…Several investigators have proposed construction of multi-purpose shields by adding metal structures or synthesis mineral to these composites, so that they can be used in photon #ields (11)(12)(13) . The polyethylene composites containing boron can be used as effective neutron shields, because of the high neutron absorption cross section of boron (14) .…”

High-Efficiency, Flexibility and Lead-Free X-ray Shielding Multilayered Polymer Composites

“…Given the arrangement of atoms with different absorption edges and the high speci c surface area of nanoparticles, polymer composites lled with metallic nanoparticles exhibit greater shielding effectiveness than that of polymer composites lled with microparticles. [8][9][10] Noor Azman et al used bismuth or bismuth oxide, tungsten, tungsten carbide, tungsten oxide, bismuth tungstate, nanogold, nanosilver, and graphene as replacements for lead and lead-based compounds and fabricated polymer composites for shielding X-rays. [11][12][13] Importantly, the absorption blindness of these lead-based shielding materials in 70-90 keV range was offset in the case of the polymer composites by the compounding effect of the functional llers, which were of different types and whose particles were of different sizes.…”

Investigation of fast neutron shielding properties of new polyurethane-based composites loaded with B4C, BeO, WO3, ZnO, and Gd2O3 micro-and nanoparticles

“…However, the hazardous effects of ionizing radiation had been the main disadvantage for their medical and industrial utilizations. In accordance with the development of new techniques using ionizing radiation, the investigations on novel shielding materials such as concretes and flexible low weight materials have been conducted in recent years [1][2][3][4][5].…”

“…In recent years, the advent of nanoparticles as new materials in radiation shielding resulted in significant progress in fabrication of nano-based shields for photons and neutrons [1,2,[6][7][8]. The majority of the investigations indicated that the nanoparticles improved attenuation coefficients of composites.…”