Monte Carlo方法在载人航天辐射安全性评价中的应用  

Monte Carlo method in estimating radiation safty for manned spaceflight

作　　者：贾向红[1] 许峰[1] 黄增信[1] 王根良[1] 李君利[2] 曾志[2] 

机构地区：[1]中国航天员科研训练中心,北京100094 [2]清华大学工程物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2007年第z1期1045-1047,共3页Journal of Tsinghua University(Science and Technology)

基　　金：总装备部重点试验技术课题(01100305)

摘　　要：为了评价航天员在外层空间的辐射危害,建立了载人航天辐射安全评价体系,该体系用于航天员个人剂量预估及辐射危害评价.该文利用Monte Carlo应用程序GEANT4,结合计算机化的三维人体模型,模拟质子在空间的各向同性条件,估算了单能质子造成航天员11个辐射敏感器官的吸收剂量值;并且利用某次神舟飞船所测得的质子各能量段注量数据,估算了此次飞行中各辐射敏感器官的剂量,其中皮肤剂量与飞船上所用的LiF剂量计所测得的剂量值拟合较好,与俄美所测量和计算值100～300μGy/d接近.The radiation estimating system of manned spaceflight and the application of Monte Carlo method for astronauts' dose assessment are discussed.A 3D anatomical human model was used with the Monte Carlo program GEANT4 to simulate the isotropic proton fields in space to evaluate the absorbed dose in the astronaut's 11 critical body organs caused by a single proton.The proton spectrum measured in the ShenZhou spacecraft were used to calculate the absorbed doses for a whole mission.The skin absorbed doses estimated by the programe is similar to the value 100-300 μGy/d measured by LiF.

关 键 词：载人航天 MONTE CARLO方法 空间辐射 

分 类 号：TL72[核科学技术—辐射防护及环境保护]