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Radiological Physics and Technology
Published in: Radiological Physics and Technology 3/2019

01-09-2019 | Silicone

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

Authors: Reza Malekzadeh, Parinaz Mehnati, Mohammad Yousefi Sooteh, Asghar Mesbahi

Published in: Radiological Physics and Technology | Issue 3/2019

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Abstract

Recent studies have shown that the particle size of the shielding material and photon energy has significant effects on the efficiency of radiation-shielding materials. The purpose of the current study was to investigate the shielding properties of the bismuth–silicon (Bi–Si) composite containing varying percentages of micro- and nano-sized Bi particles for low-energy X-rays. Radiation composite shields composed of nano- and micro-sized Bi particles in Si-based matrix were constructed. The mass attenuation coefficients of the designed shields were experimentally assessed for diagnostic radiology energy range. In addition, the mass attenuation coefficients of the composite were comprehensively investigated using the MCNPX Monte Carlo (MC) code and XCOM. The X-ray attenuation for two different micro-sized Bi composites of radii of 50 µm and 0.50 µm showed enhancement in the range of 37–79% and 5–24%, respectively, for mono-energy photons (60–150 keV). Furthermore, the experimental and MC results indicated that nano-structured composites had higher photon attenuation properties (approximately 11–18%) than those of micro-sized samples for poly-energy X-ray photons. The amount of radiation attenuation for lower energies was more than that of higher energies. Thus, it was found that the shielding properties of composites were considerably strengthened by adding Bi nano-particles for lower energy photons.
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Metadata
Title
Influence of the size of nano- and microparticles and photon energy on mass attenuation coefficients of bismuth–silicon shields in diagnostic radiology
Authors
Reza Malekzadeh
Parinaz Mehnati
Mohammad Yousefi Sooteh
Asghar Mesbahi
Publication date
01-09-2019
Publisher
Springer Singapore
Published in
Radiological Physics and Technology / Issue 3/2019
Print ISSN: 1865-0333
Electronic ISSN: 1865-0341
DOI
https://doi.org/10.1007/s12194-019-00529-3

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