Yazar "Khattari, Z. Y." seçeneğine göre listele

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    Enhancing mechanical, physical, radiation attenuation properties in alumino-barium-titanium-calcium-lithium glasses for nuclear applications: The pivotal role of TiO2 additives
    (Pergamon-Elsevier Science Ltd, 2024) Sen Baykal, Duygu; Afaneh, F.; Susoy, Gulfem; Al-Omari, S.; Almisned, Ghada; Kilic, G.; Khattari, Z. Y.
    This study focused on enhancing key material properties of Alumino-Barium-Titanium-Calcium-Lithium glasses for nuclear applications, specifically by integrating increasing amounts of TiO2 additives. Utilizing the MCNPX general-purpose Monte Carlo code, version 2.7.0, the research aimed to ascertain Transmission Factor (TF) values across a spectrum of well-known radioisotope energies. This analysis was conducted for glass samples with varying thicknesses, ranging from 0.5 cm to 3 cm. The study also delved into the gamma-ray shielding characteristics of these glasses at energy levels between 0.015 and 15 MeV, uncovering notable findings. In exploring the T1 to T12 glass system, various physical and optical methods were employed to measure key parameters like glass density (rho glass), molar volume (Vm), oxygen molar volume (OMV), and oxygen packing density (OPD). A significant outcome of this research was the observation that with an increase in TiO2 content, there was a corresponding rise in glass density, from 3.727 g/cm3 to 3.825 g/cm3. Furthermore, the study noted alterations in the physical and mechanical properties of the glasses. Most notably, the T12 glass sample, which contained the highest concentration of TiO2, exhibited superior gamma-ray shielding properties compared to the other glass compositions analysed.
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    Mechanic-elastic properties and radiation attenuation efficiency of TeO2/WO3/K2O composite glass systems for nuclear and medical application
    (Cell Press, 2023) Alsaif, Norah A. M.; Khattari, Z. Y.; Zakaly, Hesham M. H.; Rammah, Y. S.; Ene, Antoaneta; Al-Buriahi, M. S.
    WO3 effects on neutron and ionizing radiation defending factors of ternary tellurite-based glass blocks with molecular formula 80TeO(2) -(20-x)WO3 - xK(2)O; x = 0-20 mol% (denoted as TKWglass) has been reported via Phy-X theoretical calculations and Geant4 simulation code. Correlations between shielding factors and kinetics properties of the investigated glasses at different photon energy have been examined. The highest values of mass (MAC) attenuation coefficient were noted at 15 keV of the examined TKW-glass materials with the values of 38.408, 44.388, 49.855, 54.872, 59.492 cm(2)/g for TKW-0, TKW-5, TKW-10, TKW-15, and TKW-20, respectively. Generally, these values of the TKW-glasses obey the sequence: (TKW-0)(MAC)< (TKW-5)(MAC) < (TKW-10)(MAC) < (TKW-15)(MAC) < (TKW-20)(MAC). The highest mean free path (MFP) values of TKWglasses were registered at 15 MeV with the values of 6.101, 5.591, 5.097, 4.647, and 4.302 cm for TKW-0, TKW-5, TKW-10, TKW-15, and TKW-20, respectively. The two parameters half value layer (HVL) and MFP follow the pattern: (TKW-0)HVL, MFP > (TKW-5)HVL,MFP > (TKW-10)(HVL,MFP) > (TKW-15)(HVL,MFP )> (TKW-20)(HVL,MFP). The maximum values of effective atomic number (EAN) took place at gamma energy of 15 keV corresponding to 44.35, 48.86, 52.63, 55.83, and 58.58 for TKW-0, TKW-5, TKW-10, TKW-15, and TKW-20, respectively. The trend of the buildup factors was similar for all of the glass specimens. The fast neutron removal cross-section (S-R) enhanced as WO3 content increased in the specimens. Thus, the peaked value of S-R is 0.1059 cm(-1) was noted
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    Probing the elasticity and radiation protection potential of neodymium(III) doped zinc and niobium tellurite glasses: An integrated simulated and applied physics perspective
    (Elsevier, 2023) Zakaly, Hesham M. H.; Nabil, Islam M.; Issa, Shams A. M.; Almousa, N.; Khattari, Z. Y.; Rammah, Y. S.
    The present work scrutinizes the radiation protection features and mechanical characteristics of neodymium zinc-tellurite of composition (TeO2)(75)-(ZnO)(10) - (Nb2O5)(15-x) - (Nd2O3)(x): x = 0-9 mol%. An MCNP Monte Carlo simulation code and Phy-X software were performed to evaluate the radiation shielding parameters (e.g., linear attenuation coefficient (mu), mass attenuation coefficient (mu(m)), half value layer (H-1/2), etc. of the investigated TZNNd(x) glasses. Results revealed that the increasing of Nd2O3 concentration in TZNNd-glasses from 1 to 9 mol% had a positive effect on their elastic parameters: Young's modulus increased from 52.949 to 55.44 GPa, bulk modulus changed from 31.189 to 34.411 GPa, and the PR varied from 0.217 to 0.228 for TZNNd1 to TZNNd5. Compared to prior research on similar compositions, our findings indicate a more pronounced enhancement in both mechanical and Radiation shielding properties, suggesting an optimized composition strategy. The linear attenuation coefficient (mu) increased in the order TZNNd0 < TZNNd3 < TZNNd5 < TZNNd7 < TZNNd9. The half-value layer varies inversely with the linear attenuation coefficient and varies from 0.004 to 3.600 cm for TZNNd0, 0.003-3.453 cm for TZNNd3, 0.003-3.346 cm for TZNNd5, 0.003-3.253 cm for TZNNd7, and 0.003-3.159 cm for TZNNd9. Throughout the considered energy spectrum, the range of Z(eff) for the glasses varied from 44.98 to 30.51, 46.31 - 31.51, 47.13 - 32.18, 47.89 - 32.85, and 48.61 - 33.53 for TZNNd0, TZNNd3, TZNNd5, TZNNd7, and TZNNd9, respectively. Also, the values of fast neutron removal cross-section Sigma(R) were calculated and showed a steady increase as the partial densities of Nd and oxygen of the TZNNd-glass systems increased. The FNRCS (Sigma(R)) of the TZNNd glass samples have FNRCS values of 0.093, 0.106, 0.107, 0.108, and 0.109 cm(-1) for TZNNd0, TZNNd3, TZNNd5, TZNNd7, and TZNNd9, respectively Generally, one can conclude that the additive of Nd2O3 to Nb2O5-TeO2-ZnO glasses enhances their mechanical properties and increases their ability to absorb neutrons and photons to apply in nuclear medicine applications.
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    Tailoring a correlation between fracture resistance improvement, elastic moduli, mechanical and nuclear radiation shielding properties for sodium-borate glasses through Gallium(III) oxide incorporation
    (Elsevier, 2023) Almisned, Ghada; Khattari, Z. Y.; Sen Baykal, Duygu; Susoy, Gulfem; Kilic, G.; Ene, Antoaneta; Tekin, H. O.
    In the event of unanticipated events or emergency situations, such as equipment malfunctions or accidents, it is crucial for radiation shielding materials to preserve their structural integrity. Enhancing the fracture resistance of glasses has a wide range of benefits that extend to safety, durability, cost savings, energy efficiency, environmental considerations, technological innovation, consumer confidence, manufacturing efficiency, and reduced downtime. This research examines the characteristics of sodium-borate glasses with a nominal composition of 25Na2O-xGa2O3-(75-x)B2O3, (where x: 5, 10, 15, 20, 25, 27.5, and 30 mol%). The aim is to enhance fracture resistant qualities and radiation absorption with the addition of Ga2O3 into the glass composition. In addition to elastic moduli and mechanical properties, gamma-ray and fast neutron removal cross section values are determined for each glass sample. In addition to enhancing mechanical characteristics and elastic moduli, the use of Ga2O3 reinforcement has shown notable improvements in the gamma-ray and fast neutron absorption properties of sodium-borate glass samples. The NGB31.4 sample demonstrated the highest level of improvement in gammaray and neutron absorption characteristics. For example, the mass attenuation coefficients were calculated as 1.86645 cm2/g, 1.92189 cm2/g, 1.98875 cm2/g, 2.04052 cm2/g, 2.10506 cm2/g, 2.16271 cm2/g, and 2.17266 cm2/g for NGB5, NGB10, NGB15, NGB20, NGB25, NGB30.5, and NGB31.4 at 15 MeV photon energy, respectively. This enhancement was accomplished by incorporating Ga2O3 into the baseline sample at a mole percentage of 31.4 %. Hence, it can be concluded that the incorporation of Ga2O3 into sodium-borate glasses has the potential to serve as a systematic mechanism, leading to enhancements in mechanical strength and radiation absorption characteristics, thereby making these glasses more suitable for their intended applications. Among these samples, the greatest level of integration observed was 31.4 % mole Ga2O3. The lack of ability to examine the behavioral alterations resulting from higher Ga2O3 content in sodium-borate glasses may be regarded as a limitation of the present study. However, it is very advisable to do more research among the scientific community to thoroughly explore the potential impact of Ga2O3 on sodium-borate glasses.