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利用蒙特卡罗程序EGS4的最新版本EGSnrc ,在Linux操作系统平台上计算了在 1.5- 3.0MeV能量范围内电子在聚乙烯材料和水中的剂量深度分布 ;比较了在两种不同厚度的聚乙烯板的底部加上不同材料 (铝、铜、铅 )衬底情况下剂量深度分布的变化 ;计算了电子束在入射到聚乙烯材料之前经过的空气层的厚度对剂量损失的影响及不同电子束射野大小对剂量分布的影响。计算的结果以绝对剂量的形式给出 ,误差在 2 %以内。该方法是优化电子束辐射加工工艺的一种实用、高效的理论估算方法。
Using the latest version EGSnrc of Monte Carlo program EGS4, the dose depth distribution of electrons in polyethylene material and water in the 1.5-3.0 MeV energy range was calculated on the Linux operating system platform. Comparisons were made between two different thicknesses of polyethylene plate The effects of the thickness of the air layer that the electron beam passes before entering the polyethylene material on the dose loss and the influence of different electron beam radiation Effect of field size on dose distribution. Calculated results are given in absolute doses with an error of less than 2%. The method is a practical and efficient theoretical estimation method for optimizing the electron beam radiation processing technology.