Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Enhancement and optimization of gamma radiation shielding by doped nano HgO into nanoscale bentonite

  • Allam, Elhassan A. (Alexandria University, Faculty of Science, Chemistry Department) ;
  • El-Sharkawy, Rehab M. (Chemistry Department, Faculty of Dentistry, Pharos University in Alexandria) ;
  • El-Taher, Atef (Physics Department, Faculty of Science, Al-Azhar University) ;
  • Shaaban, E.R. (Physics Department, Faculty of Science, Al-Azhar University) ;
  • RedaElsaman, RedaElsaman (Physics Department, Faculty of Science, Al-Azhar University) ;
  • Massoud, E. El Sayed (Biology Department, Faculty of Sciences and Arts, King Khalid University) ;
  • Mahmoud, Mohamed E. (Alexandria University, Faculty of Science, Chemistry Department)
  • Received : 2021.06.20
  • Accepted : 2021.12.20
  • Published : 2022.06.25
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Abstract

In this study, nano-scaled shielding materials were assembled and fabricated by doping different weight percentages of Nano-mercuric oxide (N-HgO) into Nano-Bentonite (N-Bent) based on using (100-x% N-Bent + x% N-HgO, x = 10, 20, 30, and 40 wt %). The fabricated N-HgO/N-Bent nanocomposites were characterized by FT-IR, XRD, and SEM and evaluated to evaluate their shielding properties toward gamma radiation by using four different γ-ray energies form three point sources; 356 keV from 133Ba, 662 keV from 137Cs as well as 1173, and 1332 keV from 60Co. The γ-rays mass attenuation coefficients were plotted as a function of the doped N-HgO concentrations into N-HgO/N-Bent nanocomposites. The computed values of mass attenuation coefficients (µm), effective atomic number (Zeff) and electron density (Nel) by the 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 the increase in N-HgO concentration led to a direct increase in the mass attenuation coefficient from 0.10 to 0.17 cm2/g at 356 keV and from 0.08 to 0.09 cm2/g at 662 keV. However, a slight increase was observed in the identified mass attenuation coefficients at (1172 and 1332 keV).

Keywords

Acknowledgement

The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work through Research Groups Project under grant number (R.G.P1./229/1442).

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