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- 저자 : E. El Sayed Massoud (검색결과 1 건)
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Enhancement and optimization of gamma radiation shielding by doped nano HgO into nanoscale bentonite
Elhassan A. Allam,Rehab M. El-Sharkawy,Atef El-Taher,E.R. Shaaban,RedaElsaman,E. El Sayed Massoud,Mohamed E. Mahmoud 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.6
In this study, nano-scaled shielding materials were assembled and fabricated by doping different weightpercentages of Nano-mercuric oxide (N-HgO) into Nano-Bentonite (N-Bent) based on using (100-x% NBent þ x% N-HgO, x ¼ 10, 20, 30, and 40 wt %). The fabricated N-HgO/N-Bent nanocomposites werecharacterized by FT-IR, XRD, and SEM and evaluated to evaluate their shielding properties toward gammaradiation by using four different g-ray energies form three point sources; 356 keV from 133Ba, 662 keVfrom 137Cs as well as 1173, and 1332 keV from 60Co. The g-rays mass attenuation coefficients were plottedas a function of the doped N-HgO concentrations into N-HgO/N-Bent nanocomposites. The computedvalues of mass attenuation coefficients (mm), effective atomic number (Zeff) and electron density (Nel) bythe as-prepared samples were found to increase, while the half value layer (HVL) and mean free path(MFP) were identified to decrease upon increasing the N-HgO contents. It was concluded also that theincrease in N-HgO concentration led to a direct increase in the mass attenuation coefficient from 0.10 to0.17 cm2/g at 356 keV and from 0.08 to 0.09 cm2/g at 662 keV. However, a slight increase was observed inthe identified mass attenuation coefficients at (1172 and 1332 keV).
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