Yazar "Rammah, Yasser Saad" seçeneğine göre listele

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    A detailed investigation on highly dense CuZr bulk metallic glasses for shielding purposes
    (De Gruyter Open, 2022) Tekin, Hüseyin Ozan; Almisned, G.; Susoy, Gülfem; Zakaly, Hesham M.H.; Issa, Shams A.M.; Kılıç, Gökhan; Rammah, Yasser Saad; Lakshminarayana, Gandham; Ene, Antoaneta
    Gamma-ray shielding properties of eight different metallic glasses based on CuxZr100-x: x = 35 (Cu35Zr65) - 70 (Cu70Zr30) were determined using Monte Carlo simulations and Phy-X/PSD software. A typical gamma-ray transmission setup has been modeled in MCNPX Monte Carlo code. The general trend of the linear attenuation coefficients (?) was reported as (?)Cu35Zr65 < (?)Cu40Zr60 < (?)Cu45Zr55 < (?)Cu50Zr50 < (?)Cu55Zr45 < (?)Cu60Zr40 < (?)Cu65Zr35 [removed] (MFP,HVL)Cu40Zr60 > (MFP,HVL)Cu45Zr55 > (MFP,HVL)Cu50Zr50 > (MFP,HVL)Cu55Zr45 > (MFP,HVL)Cu60Zr40 > (MFP,HVL)Cu65Zr35 > (MFP,HVL)Cu70Zr30 for all photon energy range. The Cu70Zr30 sample showed maximum values of both the effective conductivity (C eff) and effective electron density (N eff). In addition, the Cu70Zr30 sample has minimum exposure and energy absorption buildup factor (EBF and EABF) values at all studied gamma-ray energies. The results revealed that the Cu70Zr30 sample has superior attenuation properties among all studied samples. © 2022 Huseyin Ozan Tekin et al., published by De Gruyter.
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    Mechanical properties, elastic moduli, transmission factors, and gamma-ray-shielding performances of Bi2O3-P2O5-B2O3-V2O5 quaternary glass system
    (DE GRUYTER POLAND, 2022) Tekin, Hüseyin Ozan; ALMisned, Ghada; Rammah, Yasser Saad; Susoy, Gulfem; Ali, Fatema T.; Şen Baykal, Duygu; Zakaly, Hesham M. H.; Issa, Shams A. M.; Ene, Antoaneta
    Mechanical properties, elastic moduli, transmission factors (TFs), and gamma-ray shielding performance of quaternary glass systems with chemical composition (0.25-x)Bi2O3-xB(2)O(3)-0.75(50%P2O5-50%V2O5), where x = 0.05 (S1), 0.10 (S2), 0.15 (S3), and 0.20 (S4) mol%, were comprehensively studied. The MCNPX code, Phy-X/PSD software, and the Makishima-Mackenzie model were utilized to achieve the mentioned purposes. The values of the packing density (V (t)) decreased from 0.634432 to 0.600611, while those of the dissociation energy (G (t)) increased from 51.6125 kJ/cm(3) for the S1 glass sample (with Bi2O3 = 5 mol%) to 56.7525 kJ/cm(3) for the S4 glass sample (with Bi2O3 = 20 mol%). This means that the mechanical properties were enhanced by increasing the Bi2O3 content in glasses. Linear (mu) and mass attenuation (mu (m)) coefficients for the S4 glass sample were the greatest compared to those for glass materials investigated, i.e., (mu, mu (m))(S1) < (mu, mu (m))(S2) < (mu, mu (m))(S3) < (mu, mu (m))(S4). Half- and tenth-value layers (HVL and TVL, respectively) follow the trend: (HVL, TVL)(S1) > (HVL, TVL)(S2) > (HVL, TVL)(S3) > (HVL, TVL)(S4). The effective atomic number (Z (eff)) of investigated glasses has the same trend as of linear and mass attenuation coefficients. Our findings indicate that increasing the amount of Bi2O3 reinforcement decreased the exposure buildup factor and energy absorption buildup factor values for all mean free path values (0.5-40 mfp). All glasses recorded the minimum TF values at a thickness of 3 cm. The findings would benefit the scientific community in determining the most appropriate additive bismuth(iii) oxide/diboron trioxide type and related glass composition to provide the shielding properties previously mentioned in terms of needs and utilization requirements, as well as the most suitable glass composition.
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    Mechanical properties, elastic moduli, transmission factors, and gamma-ray-shielding performances of Bi2O3-P2O5-B2O3-V2O5 quaternary glass system (vol 20, pg 314, 2022)
    (DE GRUYTER POLAND SP Z O O, 2022) Tekin, Hüseyin Ozan; Almisned, Ghada; Rammah, Yasser Saad; Susoy, Gülfem; Ali, Fatema T.; Şen Baykal, Duygu; Zakaly, Hesham M. H.; Issa, Shams A. M.; Ene, Antoaneta
    No Abstract Available.