医用电子加速器中的光中子产额计算

计算了电子加速器中不同能量的电子垂直入射到钨靶和金靶上时的光中子产额。采用 Monte Carlo 程序EGS4对电子光子簇在靶中的输运进行模拟 ,计算出光子在靶中的径迹长度 ,从而求出光中子产额。对电子加速器钨靶和金靶中的光中子产额进行了计算 ,得到了电子加速器中光中子产额随打靶电子能量变化的规律及随靶厚度变化的规律 ,为加速器靶和屏蔽系统的设计提供依据 ,并为计算光中子的剂量分布和复合靶中的光中子产额奠定基础

Photoneutron yields in medical electron accelerators

Photoneutron yields are calculated for electrons from an accelerator with various energies vertically striking thick tungsten and aurum targets. EGS4, a Monte Carlo code, was used to simulate the transportation of electron photon clusters in the targets and the photon track lengthes were calculated by tracking the radiation photons to determine the photoneutron yields. This paper analyzes the photoneutron yields for tungsten and aurum targets in medical electron accelerators to determine the variation of photoneutron yields for various incident electron energies and target thicknesses. The results supply information for the design of targets and shielding systems and provide a basis for the analysis of photonentron yields and their distribution in composite targets.