Yazar "Rammah, Y. S." seçeneğine göre listele
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Öğe Dual Impacts of Bi2O3/B2O3 Substitution on Mechanical and Attenuation Properties of Zinc-Bismuth-Borate Ternary Glasses for Diagnosis ?-Rays Shielding Materials Application(Springer, 2023) Zakaly, Hesham M. H.; Tekin, H. O.; Issa, A. M. Shams; Alrowaily, Albandari W.; Ene, Antoaneta; Rammah, Y. S.Investigations have been made on the mechanical and gamma-ray attenuation properties of the zinc bismuth-borate ternary glass system with the chemical formula (70-x)Bi2O3-xB(2)O(3)-30ZnO, where x = 20 (S1), 25 (S2), 30 (S3), 40 (S4), 45 (S5), and 50 (S6) mol%. Makishima-Mackenzie model and Phy-X/PSD software were used to accomplish this goal. Our research showed that the packing density (Vt) and dissociation energy (Gt) values reduced from S1 glass sample (with B2O3 = 20 mol% and Bi2O3 = 50 mol%) to S6 glass sample (with B2O3 = 50 mol% and Bi2O3 = 20 mol%), respectively, from 0.522 to 0.352 and from 31.53 kJ/cm(3) to 26.97 kJ/cm(3). By increasing the amount of B2O3 in the glasses, the efficiency of their mechanical features was reduced. The S1 glass sample's linear (mu) and mass attenuation (mu(m)) coefficients had the highest values among the glass materials examined, i.e., (mu, mu(m))(S6) < (mu, mu(m))(S5) < (mu, mu(m))(S4) < (mu, mu(m))(S3) < (mu, mu(m))(S2) < (mu, mu(m))(S1). The S1 glass sample exhibits the lowest values for half value layer (T-0.5) and mean free path (lambda) of all the examined glasses. Consequently, (T-0.5, lambda )(S6) > (T-0.5, lambda )(S5) > (T-0.5, lambda )(S4) > (T-0.5, lambda )(S3) > (T-0.5, lambda )(S2) > (T-0.5, lambda )(S1). The analyzed glasses' effective atomic numbers (Z(eff)) follow the same trend for mass and linear attenuation coefficients. Our results show that the values of exposure (EBF) and energy absorption (EABF) accumulation factors decreased with increasing Bi2O3 and lowering B2O3 reinforcement for all mean free path values (i.e., from 0.5 to 40 mfp). Results show that of all the glasses under study, the S1 glass sample has the best gamma-ray shielding properties.Öğe Fabrication, physical, structure characteristics, neutron and radiation shielding capacity of high-density neodymio-cadmium lead-borate glasses: Nd2O3/CdO/PbO/B2O3/Na2O(SPRINGER HEIDELBERG, 2022) Zakaly, Hesham M. H.; Tekin, Hüseyin Ozan; Issa, Shams A. M.; Henaish, A. M. A.; Ahmed, Emad M.; Rammah, Y. S.High-density glasses of neodymio-cadmium lead borate of chemical composition xNd(2)O(3)/20CdO/20PbO/(57-x)B2O3/3Na(2)O, where (0 (0Nd) <= x <= 5 (5Nd) wt%) have been fabricated by a melt quenching process. Physical, structure properties as well as gamma-radiation and neutron shielding effectiveness in wide photon energy range 0.015-15 MeV have been examined. The amorphous nature of xNd-glasses was confirmed, where there was a lack of their crystallinity. Density was gradually increased from 5.006 g/cm(3) for 0Nd-glass sample to 5.245 g/cm(3) for 5Nd-glass sample. In terms of the mass attenuation coefficient (MAC), introducing Nd3+ ions in the glass matrix has a direct constructive influence on the obtained values of MAC. Generally, the MAC trend follows the order (MAC)(5Nd) > (MAC)(4Nd) > (MAC)(3Nd) > (MAC)(2Nd) > (MAC)(1Nd) > (MAC)(0Nd). The linear attenuation coefficient (LAC) has a similar trend as MAC for all xNd-glasses. In terms of the half-value layer (T-1/2), the 5Nd-glasses possessed the minimum T-1/2 values (0.004 cm at 15 keV to 4.301 cm at 15 MeV). Therefore, the T-1/2 of the fabricated xNd-glasses has an inverse behavior of the MAC and LAC. Thus, (T-1/2)(0Nd) > (T-1/2)(1Nd) > (T-1/2)(2Nd) > (T-1/2)(3Nd) > (T-1/2)(4Nd) > (T-1/2)(5Nd). The effective atomic number (Z(eff)) parameter follows the order (Z(eff))(5Nd) > (Z(eff))(4Nd) > (Z(eff))(3Nd) > (Z(eff))(2Nd) > (Z(eff))(1Nd) > (Z(eff))(0Nd). In the energies preferred for radiation applications, 5Nd-glasses possess very low exposure (EBF) and energy absorption (EABF) buildup factor values. The fast neutron removal cross-section (FNRC) of the fabricated glasses is improved as the Nd3+ content increases in the glass matrix.Öğe Gamma-ray shielding evaluation of highly-dense PBSCCx-glasses: experimental and simulation study(Springer, 2024) Almousa, N.; Issa, Shams A. M.; Saudi, H. A.; Rammah, Y. S.; Mostafa, A. M. A.; Ene, Antoaneta; Saif, M. A.; Zakaly, Hesham M. H.In this study, comprehensive experimental measurements have been achieved to assess the gamma shielding properties of the five unique compositions and highly dense PBSCCx-glass (4.13-4.51 g/cm3) at selected gamma-ray energies (81-2614 keV). Several significant radiation shielding factors, such as mass attenuation coefficient, half value layer, and Radiation protection efficiency (RPE), have been determined. The experimental outcome data agrees with those obtained via FLUKA codes. The PBSCCx-glasses possessed mu values as: 0.2813, 0.2881, 0.2939, 0.2999, and 0.3065 cm2/g for PBSCC00, PBSCC2.5, PBSCC5.0, PBSCC7.5, and PBSCC10 at 0.662 MeV, respectively. At all selected energy, PBSCC10 glasses (10 wt%) reported the lowest T1/2 with a reduction of up to 92% at 2.614 MeV compared to PBSCC00 and recorded the. Furthermore, PBSCC10 has the highest RPE. These findings demonstrate that the PBSCC10 glass exhibits excellent attenuation properties when compared to other tested materials. Through systematic variation of CeO2 concentrations and comparison of experimental data with FLUKA simulation results, the study provided a comprehensive analysis of gamma shielding properties, validating findings and enhancing understanding of how different CeO2 levels impact radiation attenuation. That provides novel insights into the optimal composition for enhanced gamma-ray shielding.Öğe 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 notedÖğe Mechanical properties as well as gamma-ray attenuation competence: a wide-ranging examination into Tb3+ doped boro-germanate- aluminiophosphate (BGAP) glasses(ELSEVIER, 2022) Zakaly, Hesham M. H.; Tekin, Hüseyin Ozan; ALMisned, Ghada; Ahmed, Emad M.; Issa, Shams A. M.; Ene, Antoaneta; Rammah, Y. S.The mechanical properties and radiation attenuation competence of Tb3 thorn ions doped borogermanate-aluminiophosphate (BGAP) glasses with codes Tb15, Tb20, Tb25, Tb30, Tb35, and Tb40 have been investigated. Bond compression model (B-C) and Phy-X/PSD software are used to achieve these aims. All elastic moduli were reduced with increasing the Tb2O3 content in the BGAP glasses. Values of bulk (KB -C) elastic modulus were possessed decreasing from 86.676 GPa for Tb15 glass sample to 80.205 GPa for Tb40 sample. The values of Young's (EB-C) modulus were found to decrease from 118.197 to 115.641 Gpa and Poisson's ratio (sB-C) of the BGAP glasses were reduced from 0.272 to 0.259. The highest values of linear (m) and mass (mm) attenuation coefficients were possessed for the Tb40 glass sample. Therefore, (mass, linear)Tb40 > (mass, linear)Tb35 > (mass, linear)Tb30 > (mass, linear)Tb25 > (mass, linear)Tb20 > (mass, linear)Tb15. Half value layer parameter (T1/2) and mean free path (l) of BGAP glasses were have a similar trend; (l, T1/2)Tb40 < (l, T1/2)Tb35 < (l, T1/2)Tb30 < (l, T1/2)Tb25 < (l, T1/2)Tb20 < (l, T1/2)Tb15. Exposure (EBF) and energy absorption (EABF) buildup factors have a similar attitude for all BGAP glasses. However, the minimum values of EBF and EABF were recorded for the Tb40 sample. Results confirm that Tb40 sample can be considered as superior for radiation shielding among all studied glasses.(c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Öğe 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.Öğe Sodium metaphosphate-tungsten trioxide glasses: a characterization study on gamma-ray shielding properties and transmission factors (TFs)(Springer, 2023) Almisned, Ghada; Rammah, Y. S.; Zakaly, Hesham M. H.; Baykal, Duygu Sen; Issa, Shams A. M.; Ene, Antoaneta; Tekin, H. O.In the present study, gamma-ray attenuation properties as well as transmission factor values of high-density sodium metaphosphate-tungsten trioxide glasses with chemical composition of (40-x)NaPO3-xWO3-60Sb2O3: (x = 0 (S1), 5 (S2), 10 (S3), 15 (S4), 20 (S5), 30 (S6), and 40 (S7) mol%) have been investigated. MCNPX general purpose Monte Carlo code and Phy-X/PSD program were utilized for the calculation of transmission factor values and fundamental gamma-ray shielding parameters. Our findings suggest that the S7 sample (with the highest WO3 content mole%) has possessed the maximum mass attenuation coefficients (mu m) at all gamma-ray energies investigated. In terms of half value layer (HVL) and mean free path (MFP), the coded glass sample S7 has achieved the minimum values. The effective atomic number (Zeff) and equivalent atomic number (Zeq) of the investigated glasses have the same trend of mass attenuation coefficient. The raising of WO3 content in mole% in glasses leads to reducing both exposure and absorption buildup factor values for all mean free path values. The minimum transmission factor (maximum attenuation) quantities were verified at a thickness of 3 cm for all investigated glasses. It can be concluded that the S7 sample exhibits superior radiation shielding characteristics.
