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    Calculating some nuclear properties of chromium isotopes in the shell model
    (Springer, 2025) Ali, Ahmed H.; Abbasi, Akbar; Akkoyun, Serkan; Korna A.H.; Hossain I.; Alshammari H.; Zakaly, Hesham M. H.
    The present study provides an in-depth theoretical examination of the shell model for a range of even-even Chromium (Z = 24) isotopes, encompassing neutron numbers both 22 and 36. The shell model calculations relied on assumptions about the disregarded core-polarization effects and the utilization of effective charges. We performed extensive theoretical calculations to determine the probability of reduced electric quadrupole transition, B(E2;0g.s+ → 2+), the intrinsic quadrupole moments (Q0), the deformation parameters (β2,δ), and the inclusion of effective interactions such as fpd6, fpv, fpbm, and kb3. Using the NuShellX@MSU algorithm, the one-body density matrix elements (OBDM) were computed for these isotopes. Various effective charges were utilized in these computations, including NU-E effective charges obtained from the Nushellx@MSU software, ST-E standard effective charges, and BM-E effective charges calculated using Bohr and Mottelson’s method. Comparative analysis was conducted between the theoretical values of transition rate B(E2), intrinsic quadrupole moments, deformation parameters and the available experimental data. The gained theoretical conclusions were subsequently contrasted with prior experimental data, which had similarly demonstrated the collapse of the magical property of the Cr isotope. The intrinsic quadrupole moment was optimal when employing the kb3 interaction, but the deformation parameter appeared optimal when using two interactions, fpbm and kb3. Furthermore, it has been demonstrated that the magical characteristic of the 52Cr (N = 28) isotope undergoes collapse. © Indian Association for the Cultivation of Science 2024.
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    Detailed investigation of mechanical and gamma-ray shielding capabilities of zinc, bismuth, and niobium-doped Tellurite glasses
    (Elsevier Ltd., 2025) Almousa, N.; Issa, Shams A.M.; El-Shamy, N.T.; Ali, Ahmed H.; Zakaly, Hesham M.H.
    This study presents a comprehensive examination of the glass systems consisting of TeO2, ZnO, Bi2O3, and Nb2O5. The objective is to assess their suitability as radiation shielding materials and analyze their mechanical characteristics. Analysis of TZBN1's mass attenuation coefficients (MAC) was conducted using FLUKA modeling and XCOM. The findings indicated that TZBN1 had the highest Mean Absolute Change (MAC) at low energy levels (0.02 MeV), measured 38.547 cm2/g. These findings suggest that TZBN1 has a more favorable photoelectric effect interaction. Over energies beyond 20 MeV, TZBN4 has exceptional performance in comparison to other samples, with a mass attenuation coefficient (MAC) of 0.043996 cm2/g. These findings suggest an improved capacity to provide protection against high-energy photons. The density of the glass substrates is an essential factor, and TZBN4 exhibits a peak density of 6.15 g/cm³. Consequently, it exhibits a reduced gamma-ray transmission factor (TF), thereby underscoring its efficacy in mitigating gamma radiation. Based on the Makishima and Mackenzie model, TZBN1 exhibits the greatest Young's Modulus, measured at around 814.67 kJ/mol per PD. These findings suggest that TZBN1 exhibits the highest level of mechanical strength and stiffness among the glasses examined. In contrast, TZBN4 exhibits the lowest Young's Modulus of 453.47 kJ/mol per PD, making it potentially appropriate for certain applications that need flexibility. The results underscore the importance of glass chemical composition in tailoring materials for radiation protection and mechanical robustness. The glasses composed of TeO2, ZnO, Bi2O3, and Nb2O5, namely TZBN4, are regarded as very promising for applications that need efficient shielding against high-energy photons, while also providing material flexibility and strength. This paper presents a substantial framework for selecting and creating glass materials for the goal of providing safe shielding in the domains of medicine, industry, and nuclear facilities. © 2024 Elsevier Ltd