Influence of the size of nano- and microparticles and photon energy on mass attenuation coefficients of bismuth–silicon shields in diagnostic radiology

摘要: Recent studies have shown that the particle size of shielding material and photon energy has significant effects on efficiency radiation-shielding materials. The purpose current study was to investigate properties bismuth–silicon (Bi–Si) composite containing varying percentages micro- nano-sized Bi particles for low-energy X-rays. Radiation shields composed nano- micro-sized in Si-based matrix were constructed. mass attenuation coefficients designed experimentally assessed diagnostic radiology range. In addition, comprehensively investigated using MCNPX Monte Carlo (MC) code XCOM. X-ray two different composites radii 50 µm 0.50 µm showed enhancement range 37–79% 5–24%, respectively, mono-energy photons (60–150 keV). Furthermore, experimental MC results indicated nano-structured had higher (approximately 11–18%) than those samples poly-energy photons. amount radiation lower energies more energies. Thus, it found considerably strengthened by adding nano-particles