Yazar "Mhareb, M. H. A." seçeneğine göre listele

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  • Küçük Resim
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    Structural, magnetic and gamma-ray shielding features of cerium doped Mg2FeTiO6 double perovskite
    (Elsevier, 2023) Saleh, Noha A.; Alqahtani, Muna Y.; Mhareb, M. H. A.; Ercan, Filiz; Ghrib, Taher; Kayed, Tarek S.; Özçelik, Bekir
    The Mg2FeTi1-xCexO6 [ x = (0, 2, 4, 6, 8, 10)%] ceramics with different Ce concentrations have been pre-pared by solid-state technique. That compounds were doped with cerium dioxide (CeO2) to develop new material for gamma radiation shielding. The prepared nanomaterials were analyzed to investigate their structural and optical properties by XRD, FTIR, SEM, magnetic properties, and UV techniques. It was de-termined by the XRPD method that the atomic and molecular structures of Ce-doped compounds were in the tetragonal crystal system and crystallized in the P4/mmm (No: 123) space group. The refinement parameters of the compound Ce doped x = 8% were gof 2.4 and Rf 0.82. The effect of the Ce doping on the magnetization was measured in the magnetic field ranging at +/- 10 kOe for two temperatures (300 and 10 K) and showed that its Saturation Magnetization (Ms) was increased with the doping increase from 6.2 to 8.1 and from 14.7 to 18.7 for the temperatures 300 and 10 K, respectively. Various radiation shielding parameters for gamma-rays, neutron, and proton were evaluated using Phy-X and SRIM soft -wares. The linear attenuation coefficient (LAC) increases gradually with adding CeO2 to Mg2FeTiO6 from 54.290 to 92.032 cm -1 at 0.015 MeV. Also, fast neutron removal cross-section ( ER ) rises from 0.077 to 0.115 cm-1 for x = 0 and x = 10%. While the sample x = 10% shows the lowest projectile range for pro-tons. This sample considers the best sample to stop protons. The Analysis demonstrates that the sample with x = 10% shows the highest gamma, proton, and neutron shielding properties nominated it to use in radiation shielding field.(c) 2022 Elsevier B.V. All rights reserved.
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    Öğe
    Structural, optical, photoluminescence and radiation-shielding investigation of magnesium doped barium zirconate (BaZrO 3 ) ceramics
    (Pergamon-Elsevier Science Ltd, 2024) Ghrib, T.; Ben Ali, A.; Ercan, F.; Mhareb, M. H. A.; Al-muteliq, S. Y.; Ercan, I.; Kaygili, O.
    Magnesium-doped barium zirconate (BaZrO3) powders with various Mg atomic ratios (0.1, 0.2, 0.3, 0.4, and 0.5) have been synthesized by using the solid-state reaction method. The structure and microstructure were studied via scanning electron microscopy, X-ray powder diffraction (XRD), energy dispersive X-ray (EDX), Raman, and Fourier transform infrared (FTIR) spectroscopy. The optical properties were investigated using UV-Vis and photoluminescence spectroscopy. XRD results showed that the synthesized powders have a cubic crystal system with a grain size in the range of 23-27 nm. The band gap is estimated to be about 3.5-3.59 eV. The photoluminescence shows UV and visible emissions. The neutron and gamma shielding features were calculated and assessed based on Phy-X software of energies ranging from 0.015 to 15 MeV. The gamma shielding parameters were generally reduced by adding Mg instead of Ba. The neutron shielding parameter was enhanced gradually. Based on these results, the ability to use the synthesized samples in radiation and neutron shielding applications can be deduced.