聚变α粒子对第一壁辐照损伤的蒙特-卡罗研究(Ⅲ)——固体中位移原子深度分布

本文用基于两体碰撞的蒙特-卡罗方法研究α粒子轰击固体靶的位移原子深度分布,并分析了位移原子深度分布与固体中能量沉积的关系。文中给出入射α粒子能量、入射角及靶材料的改变对位移原子深度分布的影响。结果表明,位移原子数与轰击离子在靶中的弹性能量损失密切相关。聚变α粒子在SiC中产生的位移损伤远小于它在不锈钢材料中的位移损伤。关键词：

MONTE-CARLO STUDIES OF RADIATION DAMAGE CAU-SED BY FUSION a-PARTICLES IN THE FIRST WALL(Ⅲ)——DEPTH DISTRIBUTION OF DISPLACED ATOMS IN SOLIDS

By means of the Monte-Carlo method based on the binary collision approximation, we investigate the depth distribution of displaced atoms in solids induced by fusion α-particles. The relations between the distribution of displaced atoms and the energy deposition profiles in solids are studied. The dependence of the incident energy and angle of a-particles, as well as the component of the target element on the depth distribution of displaced atoms are presented. It is shown that the displacement damage has close relation with the deposition energy caused by ion-bombardment. Also, the displacement damage created by fusion α-particles is stainless steel (Fe_0.73Cr_0.18Ni_0.09) is less than that in SiC.