4 / 2026-02-18 17:17:26

Radiation Shielding Performance of TeO2-Based Boro-Tellurite Glass Systems

Keywords: Glasses, MCNPX, PHY-X/PSD, Radiation Shielding, Simulation, Mass Attenuation Coefficient, Half Value Layer

极端条件下的基础物理 > 极端条件下的原子物理、核物理与等离子体物理

Abstract

The shielding properties of three glass samples, 50B₂O₃-20Bi₂O₃-15TeO₂-15BaO (S1), 50B₂O₃-20Bi₂O₃-10TeO₂-20BaO (S2), and 50B₂O₃-20Bi₂O₃-5TeO₂-25BaO (S3), were investigated using MCNPX simulations and PHY-X/PSD software in the energy range of 0.015-15 MeV. The densities of the glasses increased with higher Bi₂O₃ and BaO content, enhancing compactness. The mass attenuation coefficient (MAC) and linear attenuation coefficient (LAC) decreased with increasing photon energy, as higher energies allow greater radiation penetration. The MAC of S1 varies from 110.572 to 0.036 cm²/g, S2 from 110.118 to 0.045 cm²/g, and S3 from 96.164 to 0.03cm²/g, reflecting the higher photon attenuation of S1 due to its high-Z element content (Bi, Te, Ba). The LAC shows a slight absorption edge around 0.10 MeV, with values of 5.48231, 5.19374, and 5.96862 cm^-1 for S1, S2, and S3, respectively. The half-value layer (HVL) ranges from 0.02610 to 2.78005 cm, and the tenth-value layer (TVL) ranges from 0.00429 to 8.00682 cm, with S1 exhibiting the lowest TVL due to its higher density. At lower energies, the mean free path (MFP) indicates more efficient radiation absorption, while in the 0.4-1 MeV range, the effective atomic number (Zeff) remains nearly constant, showing Compton scattering dominates photon interactions. These results confirm that the investigated glasses, especially S1, are effective shielding materials for x-rays and γ-rays in medical, nuclear, and space applications.