In this work, the γ-ray attenuation properties of some thermoplastic polymers as widely used materials in nuclear medical diagnosis and treatment have been studied. The mass attenuation coefficient (μ_m) of all selected polymer samples have been measured using NaI (Tl) detector, WinXCom Program and MCNPX simulation at photon energies 122-1332 keV. Further, μ_m values were used to estimate other related parameters including linear attenuation coefficient, total molecular, atomic, and electronic cross-sections, effective atomic number, effective electron density, relaxation length, HVL and TVL. Results show that the theoretical and simulation values of attenuation parameters are in satisfactory agreement with experimental results. However, the experimental values of μ_m have been found to be closer to those calculated by MCNPX than the values obtained by WinXCom. In addition, the effectiveness of well-known thermoplastic polymer materials in nuclear medicine application at different photon energies has been compared and discussed.

在这项工作中，已经研究了一些热塑性聚合物作为核医学诊断和治疗中广泛使用的材料的γ射线衰减特性。使用NaI（Tl）检测器，WinXCom程序和MCNPX模拟在光子能量122-1332 keV下测量了所有选定聚合物样品的质量衰减系数（_μm）。此外，_μm值用于估计其他相关参数，包括线性衰减系数，总分子，原子和电子截面，有效原子序数，有效电子密度，弛豫长度，HVL和TVL。结果表明，衰减参数的理论和模拟值与实验结果吻合良好。然而，μ的实验值_米已经发现，与WinNPCom获得的值相比，MCNPX计算的结果更接近于MCNPX计算的结果。另外，已经比较并讨论了已知热塑性聚合物材料在核医学应用中在不同光子能量下的有效性。