载能团簇离子诱发的非线性二次离子发射  

Non-linear Effect of Secondary Ion Emission Induced by Energetic Clusters

作　　者：史平[1] 丁富荣[1] 王尧[1] 聂锐[1] 马宏骥[1] 

机构地区：[1]北京大学物理学院技术物理系,北京100871

出　　处：《原子核物理评论》2005年第2期193-197,共5页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(10175005);北京大学重离子物理研究所资助项目~~

摘　　要：载能团簇离子进入固体时,由于集体相互作用,在入射路径上产生非常高的能量沉积密度。实验发现,载能团簇离子的作用结果并不等于团簇中各原子独立作用的总和,而是具有非线性效应。就二次离子发射而言,这种非线性通常与团簇的能量、团簇的大小、离子的电荷态以及靶物质的结构有关。通过研究二次离子发射有助于理解载能团簇离子与物质相互作用过程中的能量沉积与释放机制。Using energetic cluster as projectile is a unique way to produce simultaneous impacts of several atoms and deposit extremely high energy density in a very small area. The cluster impingement on solids has exhibited some non-linear effects not presented in collisions of individual atoms with those solids. The study of the secondary ion emissions can give insight into the energy deposition and relaxation steps of the cluster-solid interaction. The dependence of the yields of secondary ion emission induced by clusters on the energy of clusters, cluster sizes, charge states and material structures of the targets was reviewed in this paper.

关 键 词：团簇 二次离子发射 非线性效应 能量损失 电荷态 

分 类 号：O571.33[理学—粒子物理与原子核物理]