Ar17+离子掠射钨靶表面的沟道效应研究  

Channeling Effect in Grazing Incidence Ar 17+Ions Scattering From Tungsten Surface

作　　者：谢尊 罗先文 XIE Zun;LUO Xianwen(College of Physics and Electronic Information Engineering,Guilin University of Technology,Guilin,Guangxi Province 541004,China)

机构地区：[1]桂林理工大学物理与电子信息工程学院,桂林541004

出　　处：《现代应用物理》2024年第6期110-121,共12页Modern Applied Physics

基　　金：广西科技计划资助项目(桂科AD20238068);国家自然科学基金资助项目(11405166);桂林理工大学研究基金资助项目(GUTQDJJ 2019177)。

摘　　要：利用蒙特卡罗模拟方法探究了离子掠射钨晶体表面时的轴向和平面沟道效应。选择Ar^(17+)离子作为入射离子,重点关注离子在W(111)面掠射时沿着不同方位角的轨迹、阻止本领及能损谱之间的联系。研究发现,当Ar^(17+)离子沿着面沟道掠射时,相互作用轨迹类型更集中,能损谱表现为单峰结构且阻止本领分布更加无序;而当Ar^(17+)离子沿着轴沟道掠射时,轨迹类型呈现多样性,能损谱表现为多峰结构且阻止本领分布呈现更加规律的周期性波动。此外,比较了Ar^(17+)离子掠射不同晶面(W(111),W(100)和W(110))时的阻止本领周期性波动现象,揭示了晶面结构对离子运动的影响规律。In this paper,the axial and planar channeling effects in grazing incidence ions scattering from tungsten surface are investigated by using the Monte Carlo simulation method.Ar^(17+)ions are selected as incident ions.The aim is to explore the correlations in trajectories,stopping power and energy loss spectrums produced by grazing incidence ions scattering from W(111)surface at different azimuthal angles.The study shows that the planar channeling trajectories are more concentrated,the energy loss spectrums show single-peak structure,and the stopping power distributions show more disorder.By comparison,the axial channeling trajectories displayed diversity,the energy loss spectrums show multi-peak structure,and the stopping power distributions show periodic waveforms more obviously.Furthermore,comparisons are made regarding the periodic waveforms of stopping power distributions when grazing incidence Ar^(17+)ions scattering from different surfaces(W(111),W(100)and W(110)),unveiling the influence law of surface structures to ions motion.

关 键 词：轴沟道效应 面沟道效应 电子密度 阻止本领 掠角散射 

分 类 号：O571[理学—粒子物理与原子核物理] TL99[理学—物理]