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    Analysis of radiation shielding, physical and optical qualities of various rare earth dopants on barium tellurite glasses: A comparative study
    (Elsevier Ltd, 2023) Boodaghi Malidarre, Roya; Akkurt, İskender; Koçar, Oğuz; Ekmekçi, İsmail
    In the present study, the barium tellurite glasses with the compositions of 60TeO2– 20ZnO– 4BaF2-(16-x) BaCO3- xREEs2O3 (Rare Earth Elements) where x = 0, 1, and 2 of Tm2O3, Er2O3, and Ho2O3 in mol% have been studied via MCNPX simulation code in terms of radiation shielding, physical, and optical qualities. Seven various glasses coded as TeZnBB, TeZnBBTm1.0 (Tm1.0), TeZnBBEr1.0 (Er1.0), TeZnBBHo1.0 (Ho1.0), TeZnBBTm2.0 (Tm2.0), TeZnBBEr2.0 (Er2.0), and TeZnBBHo2.0 (Ho2.0) in this work. The radiation shielding features have been derived using BLL. In addition, N, VM, VS, ri, rp, and F are extracted analytically. The optical properties have been obtained using Tauc’s Plot, Mott and Davis, and Lorentz –Lorentz equations. Findings show that the addition of various REEs to barium tellurite glasses improves the radiation shielding capacity of the base glass. Furthermore, the physical features of preferred glasses are enhanced remarkably and as a result, a tight glass structure is created. Moreover, M has small values near zero, showing a narrow bandgap in relevant optical glasses. Also, RLoss and ? increase which is owing to the increase in the number of Non-Bridging Oxygens and causes the locking up of the free movement of the electrons in preferred glasses.
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    The role of La2O3 rare earth (RE) material in the enhancement of the radiation shielding, physical, mechanical and acoustic properties of the tellurite glasses
    (Taylor and Francis Ltd., 2022) Boodaghi Malidarre, Roya; Akkurt, Iskender; Ekmekci, Ismail; Zakaly, Hesham M. H.; Mohammed, Haneen
    Understanding the influence of Rare-Earth Elements (REEs) in tellurite-rich glass is vital for developing the technology due to applications of REEs in various technologies like television displays, solid-state lasers, tunable waveguides, tunable fiber grating, etc. With this motivation, the present work analyzes the radiation shielding, physical, structural, mechanical and acoustic properties of the (1-x)TeO2-xLa2O3: x = 5, 7, 10, 15 and 20 (mol%) glass samples. For this purpose, using user-friendly MCNPX Monte Carlo code the LaTe1–LaTe5 glass samples are irradiated, and thus the radiation shielding competencies are obtained for wide energy spans ranging from 0 to 15 MeV. The derived Half Value Layer ((Formula presented.)) outcomes are compared with the theoretical studies namely, Phy-X:PSD results for some selected energies. In addition, the mechanical features are obtained by the (Makishima Mackenzie) Mak-Mac Model. Based on the mechanical characteristics, acoustic properties are extracted and reported in this paper. The structure and dimensionality of the preferred samples are derived based on the Bergman and Kantor model for fluid and compositions with the help of the Fractal Bond Connectivity (FBC). Findings show that La2O3 is an effective Rare Earth (RE) material to increase the shielding ability of the LaTe glass samples from LaTe1 to LaTe5. Furthermore, from the obtained results can be concluded that the La2O3 RE material is able to break the glass structure and increase the linkage, and thus, the acoustic properties will be improved.