人体模型内中子剂量分布的研究

Study for Use in the Neutron Dose Distributions in An Man Model

单能中子束垂直入射到人体模型内中子剂量的分布,假定模型主要由氧、碳、氢和氮四种元素组成。计算中考虑了弹性散射、非弹性散射、带电粒子发射和辐射俘获。采用蒙特—卡罗方法进行计算,对~1H(n,r)~2D 的剂量用扩散理论处理。文中给出了单能中子和俘获γ的剂量当量与贯穿深度分布。

The neutron dose distributions have been calculated in a given cylindrical phantom simulating the human body.Itis assumed that the phantom is composed of homogeneously mixed hydrogen,carbon,oxygen,nitrogen elements,and several parallel ineident beams of monoenergetic neutrons are perpendicular to the axis of the cylindrical phantom.In computation,the elastic scattering,inelastic scattering,charged particle emission and radiation capture are under consideration.The doses from ^(14)(n,p)^(14)C and ~1H(n,r)~2D reactions of monoenergetic neutrons are treated by analytical method from the diffusion theory,in this paper,the calculated depth-dose distributions contributed from neutrons and inducedgamma rays are presented.