Insulating epoxy/barite and polyester/barite composites for radiation attenuation
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- 作者：M.A. El-Sarraf ; A. El-Sayed Abdo
- 关键词：Radiation shielding ; Composite ; Mechanical properties ; Physical Properties ; Attenuation parameters ; MCNP
- 刊名：Applied Radiation and Isotopes
- 出版年：2013
- 出版时间：September, 2013
- 年：2013
- 卷：79
- 期：Complete
- 页码：18-24
- 全文大小：900 K
文摘
A trial has been made to create insulating Epoxy/Barite (EP/Brt) (¦Ñ=2.85 g cm?3) and Crosslinked Unsaturated Polyester/Barite (CUP/Brt) (¦Ñ=3.25 g cm?3) composites with radiation attenuation and shielding capabilities. Experimental work regarding mechanical and physical properties was performed to study the composites integrity for practical applications. The properties were found to be reasonable. Radiation attenuation properties have been carried out using emitted collimated beam from a fission 252Cf (100 ¦Ìg) neutron source, and the neutron-gamma spectrometer with stilbene scintillator. The pulse shape discriminating (P.S.D) technique based on the zero cross-over method was used to discriminate between neutron and gamma-ray pulses. Thermal neutron fluxes, measured using the BF3 detector and thermal neutron detection system, were used to plot the attenuation relations. The fast neutron macroscopic effective removal cross-section ¦²R, gamma ray total attenuation coefficient ¦Ì and thermal neutron macroscopic cross-section ¦² have been evaluated. Theoretical calculations have been achieved using MCNP-4C2 code to calculate ¦²R, ¦Ì and ¦². Also, MERCSF-N program was used to calculate macroscopic effective removal cross-section ¦²R. Measured and calculated results have been compared and were found to be in reasonable agreement.