EGS4 Monte Carlo determination of the beta dose kernel in water.
EGS4 Monte Carlo determination of the beta dose kernel in water.
复制标题
EGS4 蒙特卡罗测定水中的 β 剂量内核。
DOI：
10.1118/1.596565
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发表时间：
1990
期刊：
影响因子：
3.8
通讯作者：
Mackie,TR
中科院分区：
文献类型：
--
作者：
Simpkin,DJ;Mackie,TR
EGS4 蒙特卡罗代码已用于模拟 H2O 中有关放射免疫治疗中潜在用途的单能电子和放射性核素的点源的发射和能量沉积。研究的辐射为0.05、0.1、0.5、1.0、2.0和3.0MeV单能电子和32P、67Cu、90Y、105Rh、131I、153Sm、186Re和188Reβ粒子以及转换电子和俄歇电子。十批 10 000 个电子（或 10 000 个放射性核素衰变）每批均在无限均质 H2O 体模中的一点处各向同性地启动。 EGS4 蒙特卡洛代码的参数减少电子步传输算法 (PRESTA) 版本用于跟踪这些及其后代，对沉积在薄球壳中的能量进行评分。计算缩放剂量内核并与文献中可用的内核进行比较。这些先前发布的内核要么完全忽略二次电子，要么基于蒙特卡罗代码，该代码对朗道能量离散分布进行了不正确的采样。
The EGS4 Monte Carlo code has been used to simulate the emission and energy deposition in H2O about point sources of monoenergetic electrons and radionuclides of potential use in radioimmunotherapy. The radiations studied were 0.05, 0.1, 0.5, 1.0, 2.0, and 3.0 MeV monoenergetic electrons and32P,67Cu,90Y,105Rh,131I,153Sm,186Re, and188Re β particles and conversion and Auger electrons. Ten batches of 10 000 electrons (or 10 000 radionuclide decays) each were started isotropically at a point in an infinite homogeneous H2O phantom. The parameter–reduced electron–step transport algorithm (PRESTA) version of the EGS4 Monte Carlo code was used to follow these and their progeny, scoring the energy deposited in thin spherical shells. The scaled dose kernels are calculated and compared to kernels available in the literature. These previously published kernels either completely ignore secondary electrons or are based on a Monte Carlo code which improperly sampled the Landau energy straggling distribution.