Abstract γ-ray, fast and thermal neutrons shielding features for five Pb-free {[(TeO2)0.70(B2O3)0.30]0.7 (ZnO)0.30}(1-x)(La2O3)x (x = 0.01, 0.02, 0.03, 0.04, and 0.05 mol%) glasses have been inspected in this work. For all samples, within the photon energy range of 0.015–15 MeV, linear attenuation coefficients (μ) and mass attenuation coefficients (μ/ρ) were estimated using WinXCOM program (theoretical approach), and obtained μ/ρ values are in fine agreement with computed μ/ρ results of respective MCNP5, Geant4, and Penelope codes. By utilizing μ/ρ values of WinXCOM, γ-ray attenuation parameters like effective atomic number (Zeff), effective electron density (Neff), half-value layer (HVL), and mean free path (MFP) were assessed within 0.015–15 MeV photon energy range, for all samples. Additionally, exposure buildup factors (EBFs) and energy absorption buildup factors (EABFs) were calculated for all samples by applying a five parameter geometric progression (G‒P) fitting method as a function of various penetration depths (1, 5, 10, 15, 20, 25, 30, 35, and 40 mfp) within 0.015–15 MeV photon energy range. The derived radiation protection efficiency (RPE) results indicate all samples' effective attenuation competence for lower energy γ-rays. Among all glasses, 46.55TeO2-19.95B2O3-28.5ZnO–5La2O3 (mol%) sample, by having relatively bigger μ/ρ and Zeff, minimal HVL and MFP, and lowest EBF and EABF, endorse its' excellent γ-ray shielding effectiveness. Further, neutron shielding parameters such as macroscopic removal cross-section for fast neutrons (ΣR), coherent and incoherent scattering cross-sections (σcs & σics), absorption cross-section (σA), and total cross-section (σT) for thermal neutrons were explored. By using the Geant4 code, ‘σT’ values have been deduced within 10−4‒10−8 MeV neutron energy range. The 46.55TeO2-19.95B2O3-28.5ZnO–5La2O3 (mol%) glass owns relatively larger ΣR (0.1474 cm−1) for fast neutrons attenuation and ‘σT’ (10.1444 cm−1 at 0.0253 eV neutron energy, 15.9824 cm−1 → 0.551 cm−1 from 1 × 10−8 MeV →1 × 10−4 MeV neutron energy) for thermal neutrons absorption, respectively, revealing its' superior neutrons shielding ability.

中文翻译：

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TeO2–B2O3–ZnO–La2O3 玻璃：通过 WinXCOM 程序、MCNP5、Geant4 和 Penelope 模拟代码进行γ射线和中子衰减特性分析

五个无铅 {[(TeO2)0.70(B2O3)0.30]0.7 (ZnO)0.30}(1-x)(La2O3)x (x = 0.01, 0.02, 0.03) 的抽象γ射线、快中子和热中子屏蔽特性、0.04 和 0.05 mol%) 玻璃已在这项工作中进行了检查。对于所有样品，在0.015-15 MeV的光子能量范围内，使用WinXCOM程序（理论方法）估计线性衰减系数（μ）和质量衰减​​系数（μ/ρ），获得的μ/ρ值非常吻合使用各自 MCNP5、Geant4 和 Penelope 代码的计算 μ/ρ 结果。通过利用 WinXCOM 的 μ/ρ 值，γ 射线衰减参数如有效原子序数 (Zeff)、有效电子密度 (Neff)、半值层 (HVL) 和平均自由程 (MFP) 在 0.015-15 之间进行评估MeV 光子能量范围，适用于所有样品。此外，通过应用五参数几何级数 (G-P) 拟合方法作为各种穿透深度 (1, 5, 10, 15, 20 、25、30、35 和 40 mfp）在 0.015-15 MeV 光子能量范围内。导出的辐射防护效率 (RPE) 结果表明所有样品对低能 γ 射线的有效衰减能力。在所有玻璃中，46.55TeO2-19.95B2O3-28.5ZnO–5La2O3 (mol%) 样品具有相对较大的 μ/ρ 和 Zeff，最小的 HVL 和 MFP，以及最低的 EBF 和 EABF，证明其出色的 γ 射线屏蔽效果. 此外，中子屏蔽参数，例如快速中子的宏观去除截面 (ΣR)、相干和非相干散射截面 (σcs & σics)，研究了热中子的吸收截面 (σA) 和总截面 (σT)。通过使用 Geant4 代码，已在 10−4‒10−8 MeV 中子能量范围内推导出 'σT' 值。46.55TeO2-19.95B2O3-28.5ZnO-5La2O3 (mol%) 玻璃具有相对较大的 ΣR (0.1474 cm-1) 和 'σT' (10.1444 cm-1 at 0.02-53 eV cm-15.19 → 0.551 cm-1 从 1 × 10-8 MeV →1 × 10-4 MeV 中子能量）分别用于热中子吸收，揭示了其优越的中子屏蔽能力。