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Öğe Corrigendum to “Exploring the potential of BBNCo glasses: Physical, optical, and radiation shielding analysis”(Elsevier B.V., 2023) Uosif, M.A.M.; Issa, S.A.M.; Abouhaswa, A.S.; Mostafa, A.M.A.; Atta, A.; Zakaly, H.M.H.The authors regret < M.A.M. Uosif a,*, Shams A.M. Issa b,c,* *, A.S. Abouhaswa d,e, A.M.A. Mostafa a, Ali Atta a, Hesham M.H. Zakaly c,f,g,*** > * Corresponding author. Physics Department, College of Science, Jouf University, P.O. Box: 2014, Sakaka, Saudi Arabia ** Corresponding author. Department of Physics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia *** Corresponding author. Physics Department, Faculty of Science, Al-Azhar University, Assiut, 71452, Egypt The authors would like to apologise for any inconvenience caused. © 2023 Elsevier B.V.Öğe Dielectric, structural, optical and radiation shielding properties of newly synthesized CaO–SiO2–Na2O–Al2O3 glasses: experimental and theoretical investigations on impact of Tungsten(III) oxide(Springer Science and Business Media Deutschland, 2022) Zhukovsky, M.; Koubisy, M.S.I.; Zakaly, H.M.H.; Ali, Ahmed S.; Issa, Shams A.M.; Tekin, Hüseyin OzanThrough experimental and modeling techniques, this research sought to investigate the reflections of partial replacement of CaO–SiO2 with Tungsten(III) oxide and its effect on structural, optical, and physical properties. The melt quenching technique was used to produce several glass samples with a nominal composition of 5Na2O–10Al2O3–(42.5 ? x)SiO2–(42.5 ? x)CaO–xWO3 system (where x = 0, 0.2, 0.4, and 0.6 wt.&). The amorphous structure of calcium-silicon glasses was determined experimentally using the XRD technique. UV and density studies were also performed to determine optical and material properties. To determine the effect of this replacement on nuclear radiation shielding improvement, the linear attenuation coefficient was computed across a broad energy range of 0.015–15 MeV using narrow beam geometry and the simulated gamma-ray transmission technique. The radiation parameters were simulated using sophisticated Monte Carlo simulations using the FLUKA general-purpose radiation transport algorithm and compared using the NIST XCOm theoretical computation. To maximize the substitution's synergistic impact, the present investigation's findings were correlated with each other for the purpose of determining availability for nuclear shielding purposes. It was discovered that when the WO3 content rises from 0 to 20% wt— percent, both direct and indirect bandgaps reduce, resulting in increased transparency. In addition, the Urbach energy (Eu) yields a rise in proportion to the amount of doping elements in the samples. On the other hand, gamma-ray attenuation measurements revealed that shielding parameters are directly proportional to the WO3-wt percent concentration; furthermore, the addition of WO3 substantially enhances the shielding capacity of the investigated glasses against gamma radiation. It is observed that when additional WO3 is added, both the real and imaginary components of the dielectric constant increase. The most effective shield was determined to be the NSCW20 sample. As a result, a WO3-calcium-silicon glass containing 20% WO3 was selected as the optimum radiation filter. © 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.Öğe An experimental evaluation of CdO/PbO-B2O3 glasses containing neodymium oxide: Structure, electrical conductivity, and gamma-ray resistance(Elsevier Ltd, 2022) Zakaly, H.M.H.; Issa, S.A.M.; Tekin, Hüseyin Ozan; Badawi, A.; Saudi, H.A.; Henaish, A.M.A.; Rammah, Y.S.A comprehensive set of experimental measurements was carried out to investigate the influence of Nd3+ ions on the structure, electrical conductivity, and gamma-ray protection of CdO/PbO-B2O3 glasses containing neodymium oxide with the chemical formula 20CdO/20PbO/(60-x)B2O3/xNd2O3 (0 ? x ? 4 wt%) (5.034-5.232 g/cm3). Raman spectra have been obtained over a range of 1600-180 cm?1, and electrical conductivity (?) has been measured at frequencies of 0.120, 1, 10, and 100 KHz, as well as at other frequencies. In this study, gamma-ray attenuation has been studied at various gamma-ray energies (ranging from 0.081 to 2.614 MeV). The results revealed that the PbO in the investigated glass networks fills the interspaces of [BO3] units with Pb2+ ions, therefore serving as a network member. In general, it was found that (?) of the examined glasses falls as temperature increases, reaching its lowest value at the composition's transition temperature. Above this transition temperature, conductivity rises. Using 0.662 MeV, the studied samples exhibited experimental linear attenuation coefficients (?exp.) of 0.3369 cm?1, 0.3401 cm?1, 0.3434 cm?1, 0.3467 cm?1, and 0.3501 cm?1 (for the Nd-0.0, Nd-1.0, Nd-0.2, Nd-0.3, and Nd-4.0 glasses, respectively). With respect to the half value thickness (T1/2) and mean free path (?), the Nd-4.0 sample has the lowest values at all of the gamma-ray energies tested. According to these results, the Nd-4.0 glass sample exhibits higher attenuation capabilities against ionizing radiation when compared to the other samples. © 2022Öğe Exploring elastic mechanics and radiation shielding efficacy in neodymium(III)-enhanced zinc tellurite glasses: a theoretical and applied physics perspective(Islamic Azad University, 2023) Zakaly, H.M.H.; Rammah, Y.S.; Issa, S.A.M.; Almousa, N.; El-Refaey, A.M.; Shams, M.S.The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition [(TeO2)70-(ZnO)30]1?x-(Nd2O3)x: x = 0 ? 5 mol% in steps of 1 (TZNd1 – 5). The Makishima–Mackenzie’s model was adopted for the computation of the Poisson’s ratio (PR) and elastic moduli. WinXcom and EXABCal software’s were performed to evaluate the radiation shielding parameters and buildup factors, respectively of TZNd-glasses. Results revealed that the increasing of Nd2O3 concentration in TZNd-glasses from 1 to 5 mol% had a positive effect on their elastic parameters: Young’s modulus increased from 53.13 to 54.81 GPa, bulk modulus changed from 31.95-33.65 GPa, and the PR varied from 0.222 to 0.228 for TZNd1 to TZNd5. There was a small increase in the Z/A as the Nd content increased, which leads to slight increase in TMSP of the particles. The mass attenuation coefficient (µm) increased in the order TZNd1 < TZNd2 < TZNd3 < TZNd4 < TZNd5. The maximum value of LAC obtained at 15 keV were 246, 249, 253, 257, and 260 cm?1 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The HVT varies inversely with the linear attenuation coefficient. Throughout the considered energy spectrum the range of Ze f f for the glasses varied from 22.65 ?40.22, 22.64 ?40.25, 22.64 ?40.29, 22.63 ?40.32, and 22.63 ?40.36 for TZNd1, TZNd2, TZNd3, TZNd4, and TZNd5, respectively. The values of fast neutron removal cross section ?R showed a steady increase as the partial densities of Nd and oxygen of the TZNd-glass systems increased. Generally, one can conclude that the additive of Nd2O3 to TeO2-ZnO glasses leads to enhance their mechanical properties and increase their ability to absorb neutron and photon to apply in nuclear medicine applications. © 2023, Islamic Azad University. All rights reserved.Öğe Investigation of borate glasses reinforced with iron (III) oxide(Elsevier B.V., 2024) Alfryyan, N.; Alsaif, N.A.M.; Al-Ghamdi, H.; Issa, S.A.M.; Zakaly, H.M.H.; El-Hamalawy, A.A.; Sadeq M.S.Five samples of borate glasses reinforced with various ratios of Fe3+ ions with chemical formula (60-X)B2O3–10ZnO–10CdO–5Li2O–15Na2O-XFe2O3: (0.0 (Fe-0.0) ? X ? 1 (Fe-1.0) mol%) were prepared using the melt-quenching technique. The structure, physical, optical characteristics, and ?-ray attenuation properties of the prepared Fe-X glasses have been investigated. The amorphous state of Fe-X glasses confirmed by XRD observations. Density (?glass) of the Fe-X glasses increased from 3.21 g cm?3 to 3.91 g cm?3. Molar volume (Vm) gradually reduced from 18.87 cm3/mol to 15.35 cm3/mol with increasing Fe2O3 content in the glass network from 0.0 to 1.0 mol%. The color of Fe-X glasses changed from yellow to brown according to the absorption bands located at around 385–412 nm and 407–429 nm within the visible spectrum. The indirect optical band gap (Eg) decreased from 3.37 eV to 2.78 eV, while the linear refractive index (no) increased from 2.31 to 2.45. Mass- (MAC) and linear- (LAC) attenuation coefficients increased as Fe3+ ions increased in the glass network. The Fe-1.0 sample with highest Fe2O3 content possessed the lowest values of half-value layer (HVL) and mean free path (MFP) shielding parameters. Results revealed that the suggested glass compositions can be applied in optical and radiation protection fields. © 2024 Elsevier B.V.Öğe Pollution and health risk assessment of heavy metals in the surface sediments of Timsah Lake, Suez Canal, Egypt(Elsevier B.V., 2023) Nasr, R.A.; Shetaia, S.A.; Lasheen, E.S.R.; Dar, M.A.; Zakaly, H.M.H.Urbanization and industrial activities around Timsah Lake have led to discharging of pollutants into the lake. The heavy metals pollution level in the lake sediments and implications for living organisms and human health were estimated using several ecological indices. The spatial variations of metals (Cd, Cu, Pb, Mn, Zn, Ni, and Fe) and organic matter content demonstrate that most concentrations increase toward the western part of the lake. The geoaccumulation index (Igeo) arranged the metals as next; Cd > Pb > Zn > Cu > Mn > Fe > Ni, where the lake sediments are extended between moderately-to-extremely contaminated by Cd. Moreover, the contamination factor (CF) for Cd and Pb indicates very high contamination for 100 % of stations and moderate contamination for 58.3 % of the stations, respectively. Spatially, the degree of contamination (Cd) classified lake sediments into three categories; moderately, considerable and very highly contaminated, distributed in the lake's eastern, middle and western parts, respectively. Regarding ecological risk, the potential ecological risk factor (Eri) arranged the metals risks as follows: Cd > Pb > Cu > Ni > Zn, where Cd concentrations suggest high and very high risk for 16.7% and 83.3 % of stations, respectively. The potential ecological risk index (RI) divided lake sediments into moderate, considerable (most of the eastern part), and very high risk (most of the western part). According to sediment quality guidelines (SQGs), Cd values indicate that there have been negative effects on the biota ranging between occasional and frequent. A dermal exposure-based health risk evaluation revealed no non-carcinogenic impact on human health, while Cd indicated a tolerable risk of cancer for children. Moreover, 58.3 and 83.3 % of the stations indicated a tolerable risk of cancer by Ni for adults and children, respectively. The study recommended necessary proactive measures to monitor and manage heavy metal pollution, especially Cd, Pb, and Ni caused by human activities in the Lake. © 2023 Elsevier B.V.Öğe The role of Ag2O incorporation in nuclear radiation shielding behaviors of the Li2O-Pb3O4-SiO2glass system: A multi-step characterization study(De Gruyter Open Ltd, 2023) Almisned, G.; Susoy, G.; Zakaly, H.M.H.; Rabaa, E.; Kilic, G.; Ilik, E.; Sen Baykal D.We report the gamma-ray shielding properties of five different lithium silicate glasses based on the (40 - x) Li2O-10Pb3O4-50SiO2 nominal composition. Transmission factor values and some basic shielding parameters such as linear (?) and mass attenuation coefficients (?/?), half-value layer, tenth value layer, and mean free path (MFP) values of the investigated glass samples are determined in a large photon energy range. Using the G-P fitting method at various MFP values, the exposure buildup factor and energy absorption buildup factor values of the examined glasses are also calculated. Based on the findings, it can be concluded that the S5 glass specimen, which exhibits the greatest Ag2O additive and density among the various glass samples, represents a favorable choice for the purpose of shielding against gamma radiation. © 2023 the author(s), published by De Gruyter.Öğe Synthesis and characterization of Bi2O3–B2O3–SiO2–MgO glasses: Structural, optical, and shielding properties(Elsevier B.V., 2024) Alsafi, K.; Aloraini, D.A.; Issa, S.A.M.; Zakaly, H.M.H.; Assem, E.E.; Shaaban, K.S.The systematic investigation of the impact of Bi2O3 on the structural, spectroscopic, and radiation features of 15SiO2 - 75B2O3 - (10-x) MgO - xBi2O3, x= (0 ? x ? 10) glasses were studied. The increase in glass density as Bi2O3 content increase is due to the incorporation of Bi2O3 into the glass network. XRD patterns indicate an amorphous, glassy nature of the glasses. The optical absorption spectra suggest that as the content of Bi2O3 increases, the optical band gap (Eopt.) widens and the Urbach energy (Eu) decreases. It has been observed that the opposite trend between the (Eopt.) and (Eu). The radiation shielding characteristics of MgBi glasses have been evaluated through the assessment of several fundamental radiation attenuation variables. As Bi2O3 content increases would enhance properties like (HVL), (MFP), and (Zeq), especially at lower energy ranges. Adding Bi2O3 to the glassy system has a positive impact on enhancing its neutron attenuation ability. The MgBi-10 glass has the best shielding performance against fast neutrons. The MgBi-10 glass sample shows promising properties for optical and radiation shielding purposes. © 2024 Elsevier B.V.Öğe Thermal and optical characteristics of synthesized sand/CeO2 glasses: Experimental approach(Springer, 2022) Henaish, A.M.A.; Zakaly, H.M.H.; Saudi, H.A.; Issa, S.A.M.; Tekin, Hüseyin Ozan; Hessein, M.M.; Rammah, Y.S.In this study, glass samples of composition 20PbO-20CaO-20Sand-(40 ? x)B2O3-xCeO2, where x = 0, 2.5, 5, 7.5, and 10 in wt.% and sand = SiO2 (90.4%) + CaO (2.8%) + ZrO2 (2.3%) + Fe2O3 (2.1%), were fabricated via the ordinary melt quenching technique. The thermal and optical properties of the glasses were experimentally investigated using differential scanning calorimetry (DSC) analysis, which is measured as a function of temperature based on the difference in the amount of heat needed to raise the temperature of a sample and reference. All glasses were found to be thermally stable up to 550°C. The glass transition temperature (Tg) varied from 211°C to 219°C, crystallization temperature (Tc) varied from 303°C to 310°C, and melting point (Tm) was 577°C. The values of the indirect optical energy band gaps (EOptical, Indirect) reduced from 2.63 eV to 2.28 eV, while the direct gaps (EOptical, Direct) reduced from 5.07 eV to 4.17 eV. Urbach’s energy (EU) was changed from 0.42 eV to 0.46 eV. The dielectric constant behaved similarly to the refractive index and absorption coefficient of the proposed glasses. The refractive index data were analyzed to obtain important optical information and the corresponding derivative electrical parameters, namely, the oscillator energy, dispersion energy, dielectric constant at high frequency, the dielectric loss, and the energy-loss functions. There was a remarkable increase in the optical conductivity (?opt) with increasing CeO2 content, with peaks appearing in all samples doped by CeO2 and reaching a peak maxima of about 2.72–3.10 eV. Volume energy loss (VELF) and surface energy loss (SELF) functions were increased with increasing CeO2 content, with a characteristic peak at around 3.47 eV for all proposed samples. © 2022, The Minerals, Metals & Materials Society.
