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    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.
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    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/).