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The aim of this paper is to investigate the gamma radiation shielding properties of P2O5-SiO2-K2O-MgO-CaO-MoO3 glasses. The mass attenuation coefficients (µm) have been computed via Photon Shielding and Dosimetry (Phy-X/PSD) software in the energy range 0.015-15 MeV. The other shielding factors are also computed as the effective atomic number (Zeff), electron density (Ne), and mean free path (MFP) values, exposure (EBF) and energy absorption (EABF) buildup factors for a penetration depths 20 mfp. The values of the shielding parameters are strongly dependent on energy and chemical composition. The PSKMCM6 possesses the lowest value of MFP and highest value of µm and Zeff, among the glasses. The glass sample PSKMCM6 has minimum value of EBF and EABF as compared to other samples. [ABSTRACT FROM AUTHOR]

In this paper, the role of TeO 2 in radiation attenuating characteristics of xTeO 2 -10CaF 2 -(60–0.6x) B 2 O 3 -(30–0.4x) CaO glass system with x = 20, 25, 30, 35 and 40 wt% was investigated. The gamma radiation studies were carried out by utilizing Geant4 simulations and the newly developed Phy-X/PSD program. The gamma-shielding characteristics of the present glass samples were examined in terms of mass attenuation coefficient (μ/ρ), and some other related factors such as the effective atomic number (Z eff), and mean free path (MFP). The electron radiation-shielding characteristics were tested by determining the stopping power (ψ e) and CSDA range for each glass specimen. The neutron radiation-shielding characteristics were explored by evaluating the removal cross section (RCS) for the tested glasses. Moreover, the G-P method was employed to investigate the exposure buildup factor (EBF) for photon energies up to 15 MeV. The results showed that the TeO 2 content had a significant influence on the shielding ability of the investigated glasses against gamma and neutron radiations. In contrast, the TeO 2 content had an insignificant influence on the electron radiation-shielding capacity of the glasses involved. Additionally, the nuclear-shielding properties of the studied samples were compared with those of standard nuclear radiation shields. It can be concluded that the present calcium boro-tellurite glasses have a promising future to be used as a shielding material against gamma, electron and neutron radiation, wherein the TeO 2 concentration can be balanced according to the desired application. [ABSTRACT FROM AUTHOR]

This paper focuses on examining the radiation shielding features of seven boro-tellurite glasses in the form of TeO2–B2O3–SrCl2–LiF–Bi2O3. Gamma rays and neutrons shielding features of these glasses have been tested in terms of mass attenuation coefficient (μ/ρ), half value layer (HVL), mean free path (MFP), effective atomic number (Zeff), and removal cross section (∑R). The μ/ρ values of the present glasses were simulated by Geant4 Monte Carlo simulations over an extended energy range of 0.015 − 20 MeV and then the generated data were verified using the calculated values of WinXCOM software. Additionally, geometric progression (G–P) method was used to estimate gamma ray exposure buildup factor (EBF) for the prepared glasses. It is noted that μ/ρ and Zeff values increase, while MFP and HVL values decrease as TeO2 content increases in the glass sample. The EBF values would be useful to design or develop the present glasses for gamma shielding applications. Results reveal that the present glasses have good capability for gamma rays shielding compared with some commercial radiation shielding materials. [ABSTRACT FROM AUTHOR]

This paper evaluates the γ-radiation shielding traits of some new types of borate glasses of composition (70–x)B 2 O 3 –10Bi 2 O 3 –10BaO–10CdO–xPbO (where 0 ≤ x ≤ 20 mol%) prepared using melt quenching method. As-quenched samples were characterized to determine the effects of various PbO contents on their γ-radiation shielding properties. XRD patterns of the samples verified their amorphous nature. The Phy-X and XCOM was used to compute the mass attenuation coefficients of the glasses and then compared with the experimental data. The γ-radiation shielding performance of the proposed glasses were evaluated in terms of diverse attenuation parameters like mean free path, half and tenth value layer, atomic cross-section, electronic cross-section, effective atomic number and effective electron density. The γ-radiation shielding performance of the glasses were significantly improved with the increase of PbO contents. This new borate glass system is established to be advantageous for the radiation shielding applications. • The borate glass samples with different PbO content were prepared by the standard melt-quenching method. • The μ/ρ values of the glasses were increased with the increase of the PbO content. • The relatively higher Zeff at lower energies due to the dominance of PE effect. • Promising HVT and TVL achieved with the new prepared glasses. • The proposed glass improves the efficiency of IR shielding material. [ABSTRACT FROM AUTHOR]