Prediction of mechanical and radiation parameters of glasses with high Bi2O3 concentration

This study aims to perform multidirectional characterizations on nuclear shielding efficiencies on some bismuth-based glasses. Accordingly, the γattenuation coefficients for xBi2O3-(75-x)B2O3–25Li2O (x = 0, 10, 20, 30, 40, 50, 60 the 70 mol%) were widely evaluated using simulations and theoretical methods. Linear attenuation coefficient (LAC) of the glasses was obtained by the Monte Carlo general-purpose simulation code FLUKA and compared with the XCOM database up to 15 MeV. Moreover, LAC values have been utilized to evaluate related parameters like mass attenuation coefficient (MAC), total molecular cross-section (σt), total atomic cross-section (σa), half-value layer (HVL), total electronic cross-section (σe), mean free path (MFP), effective atomic number (Zeff), and effective electron density (Neff). The results noted that the XCOM and FLUKA data of the shielding parameters are in great agreement. Relatively higher density (5.818 g/cm3), greater LAC, MAC, Zeff, and lower HVL, MFP values are achieved for 70Bi2O3-5B2O3–25Li2O glass. Accordingly, this glass sample is a better gamma shield. © 2021 The AuthorsTaif University Researchers Supporting Project number (TURSP-2020/45) Taif University, Taif, Saudi Arabia

Calculation of The Radiation Shielding Parameters in Long Ranges of Photon Energy: Bismuth Sodium Borate Glass

Abstract The theoretical calculations on radiation shielding parameters of glass systems in the composition(80-x) B2O3: 20Na2O: xBi2O3 (where x = 0,5,10,15 and 55 mol%) were inquired into using the WinXCom program. The characteristics of radiation shielding parameters for the glass systems had been examined for the mass attenuation coefficients, the effective atomic number, and the electron density in the energy ranges of 1 keV to 100 GeV. These are the glass systems at the different compositions of bismuth which were found that depend upon the energy regions. The results demonstrate that the mass attenuation coefficients, the effective atomic number, and the electron density have the same trend which those values increase with the increasing of the different compositions of bismuth. At the low-energy region, the mass attenuation coefficients show the several discontinuous jumps of the energies which correspond to the photoelectric absorption edges. At the medium-energy region, the Compton scattering process is the main interaction in these energy ranges. In the high-energy regions, pair production becomes the main interaction process and tends to be constant over energy.</jats:p

Radiation Shielding Properties of Bi&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-Na&lt;sub&gt;2&lt;/sub&gt;O-B&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; of 662 keV

The bismuth sodium borate glasses in formula xBi2O3:20Na2O:(80-x)B2O3 (x = 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 mol %) have been prepared by melt-quenching technique. The glass sample at x=0 mol% show the colorless and show the stronger yellow at the higher Bi2O3 content. The glasses’s colors are corespondening with the cutoff wavelength’s results. The shielding properties were measured at 662 keV by Cs-137 radiation source. The obtained results show that the mass attenuation coefficient increased with the increasing of Bi2O3 concentration. Half Value Layer (HVL) of glasses were determined and compared with the some standard shielding materials. The optical and physical properties were also investigated.</jats:p

Photon Interactions Study of Bi&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-Na&lt;sub&gt;2&lt;/sub&gt;O-CaO-SiO&lt;sub&gt;2&lt;/sub&gt;-B&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Glasses

The Bi2O3 doped with soda lime borosilicate glasses in composition xBi2O3 : 15Na2O : 10CaO : 20B2O3 : (55-x)SiO2 at different concentrations (x = 0, 5, 10, 15, 20, 25 mol%) were studied the photon interactions. The total mass attenuation coefficient, coherent, incoherent, photoelectric absorption and pair production of prepared were studies using WinXcom Program at 1keV to 2MeV. The result of total mass attenuation coefficient and photoelectric absorption were decreases but discontinue because of photoelectric absorption edge at low energy. The photoelectric effect shows the main interaction at the low energy and decrease with increasing of photon energy. The higher photon energy the incoherent scattering found to be the main interaction. But at the photon energy 1.022 MeV, the pair production will be occurs and found to be the main interaction at the photon energy higher than 1.022 MeV.</jats:p

The Barium Borosilicate Glass on Neutron/Gamma Rays Shielding from Theoretical Values Computation at 1 keV to 100 GeV of the Energy Range

Abstract The inspection of radiation shielding specimens in the composition xBaO : (40-x)SiO2 : 25ZnO : 30B2O3 : 5Al2O3, where x = 10, 15, 20, 25, 30, 35, and 40 mol % of borosilicate glasses went on to radiation shielding parameters, found that the MAC, the Zeff, the atomic cross-section, and the electronic cross-section have the same trends when added BaO increase, but when the energy increases, all values of the four parameters decreased with increasing of the energy ranges. The result of Ne was described as the atomic radius of BaO that affects the probability of interactions in the Compton scattering ranges. The results of HVL and MFP demonstrated that the lower both parameters affected volume requirement and decreased the average distance when photon traveled in the material, which can design the physical characteristic of the radiation shielding specimens.</jats:p

Radiation shielding properties of BaO:WO₃:Na₂O:B₂O₃ glass system using WinXCom program in the range of 1 keV to 100 GeV: Theoretical calculation

Abstract The research aimed to study the radiation shielding properties of xBaO-5WO3-15Na2O-(80-x)B2O3 glass system where x = 5, 10, 15, 20, 25, 30 and 35 mol%. The theoretical values calculated using WinXCom program in the range of 1 keV to 100 GeV energy regions. The results of calculation found that the mass attenuation coefficients were increased with increase in BaO concentration and decreased with the increasing energy. Moreover, these glass system at low energies show discontinuities corresponding to photoelectric absorption edges of tungsten and barium. For the partials interaction at the low energies range the photoelectric absorption is the main interaction in these energy regions. At the medium energy regions, the radiation shielding parameters are almost constants dominated by Compton scattering process. In the high energy regions, pair production becomes the main interaction process over the energy. It can also be concluded that the characteristics of radiation shielding parameters for the glasses system depend on different barium in this concentration and the energy regions. The lead equivalent thickness of glass samples show that glass samples increasing trend with increase in concentration of BaO and the experimental are good agreement with theoretical value.</jats:p