This article explores the effectiveness of gamma rays attenuation of various N95 respirator samples by analysing several theoretical parameters such as the Effective Atomic Numbers (Zeff), Half Value Layer (HVL), Mean Free Path (MFP), Mass Attenuation Coefficients (MAC), Tenth Value Layer (TVL), Exposure Build Up Factors (EBF) and Energy Absorption Build Up Factors (EABF). For the selected N95 mask samples, the MAC values corresponding to the energy levels between 0.015-20 MeV are measured using the WinXCOM software and the MATLAB code. The parameters including Zeff, TVL, HVL, and MFP are computed using the MAC values derived from the WinXCOM program. EBF and EABF are computed in relation to the penetration depth and incident photon energy by using the (G-P) fitting approximation in estimating the photon build-up factor. The findings showed that having the lowest TVL, HVL, and MFP, the N2 sample has the best output in terms of radiation attenuation purposes. In conclusion, the N2 sample which outperforms other samples is the most promising mask sample when it comes to gamma-ray attenuation features.

中文翻译：

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N95口罩聚合物添加剂对伽马射线衰减特性的影响

本文通过分析有效原子序数 (Zeff)、半值层 (HVL)、平均自由程 (MFP)、质量衰减系数 (MAC)、第十价值层 (TVL)、暴露累积因子 (EBF) 和能量吸收累积因子 (EABF)。对于选定的 N95 掩模样本，使用 WinXCOM 软件和 MATLAB 代码测量与 0.015-20 MeV 之间的能量水平对应的 MAC 值。包括 Zeff、TVL、HVL 和 MFP 在内的参数是使用从 WinXCOM 程序导出的 MAC 值计算得出的。EBF 和 EABF 是通过使用 (GP) 拟合近似来估计光子积聚因子，计算与穿透深度和入射光子能量相关的。研究结果表明，就辐射衰减目的而言，N2 样品具有最低的 TVL、HVL 和 MFP，具有最佳的输出。总之，在伽马射线衰减特征方面，优于其他样本的 N2 样本是最有前途的掩膜样本。