TY - JOUR
T1 - On the physical, chemical, and neutron shielding properties of polyethylene/boron carbide composites
AU - Uddin, Zaheer
AU - Yasin, Tariq
AU - Shafiq, Muhammad
AU - Raza, Asif
AU - Zahur, Awais
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2020/1
Y1 - 2020/1
N2 - Monte Carlo methods are used for solving difficult stochastic problems in radiation shielding applications. The aim of this paper is to show the possibility of using the Monte Carlo code (MCBEND®) for evaluation and optimization of polyethylene with high boron loadings (for up to 40%) to reach better neutron shielding against fast neutrons (Am-Be neutron source). Boron is incorporated in polyethylene as boron carbide (B4C). MCBEND® (Monte Carlo code developed by ANSWERS) is used to simulate neutron transport through the developed borated polyethylene composites. In order to verify the computer simulations, neutron detection and data acquisition systems have been assembled, modified, and thoroughly tested for shielding efficiency. It is shown that borated composite with 10% of boron content showed the highest experimental mass removal cross section. Moreover, composite formulation with 10% of boron shows optimum density, morphology, mechanical attributes, and thermal stability than that of the neat polyethylene matrix. A comparison of experimental and simulation mass removal cross sections shows that the geometry and physics models proposed in this work are in close agreement, with maximum relative difference of not more than 15%.
AB - Monte Carlo methods are used for solving difficult stochastic problems in radiation shielding applications. The aim of this paper is to show the possibility of using the Monte Carlo code (MCBEND®) for evaluation and optimization of polyethylene with high boron loadings (for up to 40%) to reach better neutron shielding against fast neutrons (Am-Be neutron source). Boron is incorporated in polyethylene as boron carbide (B4C). MCBEND® (Monte Carlo code developed by ANSWERS) is used to simulate neutron transport through the developed borated polyethylene composites. In order to verify the computer simulations, neutron detection and data acquisition systems have been assembled, modified, and thoroughly tested for shielding efficiency. It is shown that borated composite with 10% of boron content showed the highest experimental mass removal cross section. Moreover, composite formulation with 10% of boron shows optimum density, morphology, mechanical attributes, and thermal stability than that of the neat polyethylene matrix. A comparison of experimental and simulation mass removal cross sections shows that the geometry and physics models proposed in this work are in close agreement, with maximum relative difference of not more than 15%.
KW - Borated polyethylene
KW - Boron carbide
KW - Fast neutrons
KW - Monte Carlo simulation
KW - Neutron shielding
KW - Polymer composite
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U2 - 10.1016/j.radphyschem.2019.108450
DO - 10.1016/j.radphyschem.2019.108450
M3 - Article
AN - SCOPUS:85070862014
VL - 166
JO - Radiation Physics and Chemistry
JF - Radiation Physics and Chemistry
SN - 0969-806X
M1 - 108450
ER -