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使用点核积分方法计算6711型~(125)I籽粒源参数,根据美国医学物理学家协会(American Association of Physicists in Medicine,AAPM)TG-43U1号报告推荐的剂量参数计算公式,可以获得6711型~(125)I籽粒源各参数。与AAPM TG-43U1推荐值比较,剂量常数相差6.76%,径向剂量函数值(不包括0.1 cm、0.15 cm、0.25 cm)最大相差2.27%,最小相差0.02%;与MCNP5(A General N-Particle Transport Code,Version 5)方法计算结果比较,剂量常数相差6.19%,径向剂量函数值(不包括0.1 cm、0.15 cm、0.25 cm)最大相差6.65%,最小相差0.06%。结果与推荐值符合较好,证明点核积分能够应用于籽粒源剂量参数计算。
The kernel source parameters of 6711 ~ (125) I seeds were calculated by using the kernel-point integration method. According to the calculation formula of dose parameters recommended by American Association of Physicists in Medicine (AAPM) TG-43U1 report, ~ (125) I seed source parameters. Compared with the recommended value of AAPM TG-43U1, the difference of the dose constants was 6.76%. The maximum difference of radial dose function (excluding 0.1 cm, 0.15 cm and 0.25 cm) was 2.27% and the minimum difference was 0.02% Transport Code, Version 5). The difference of the dose constants was 6.19%. The maximum difference of radial dose function (excluding 0.1 cm, 0.15 cm and 0.25 cm) was 6.65% and the minimum difference was 0.06%. The result is in good agreement with the recommended value, which proves that the kernel integral can be applied to calculate the dose parameters of grain source.