Understanding charge transfer of Li+ and Na+ ions scattered from metal surfaces with high work function
Understanding charge transfer of Li+ and Na+ ions scattered from metal surfaces with high work function
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了解从高功函数金属表面散射的 Li 和 Na 离子的电荷转移
DOI：
10.1088/1674-1056/25/8/083401
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发表时间：
2016
影响因子：
1.7
通讯作者：
Chen Xi-Meng
中科院分区：
文献类型：
--
作者：
Chen Lin;Wu Wen-Bin;Liu Pin-Yang;Xiao Yun-Qing;Li Guo-Peng;Liu Yi-Ran;Jiang Hao-Yu;Guo Yan-Ling;Chen Xi-Meng
对于Li+和Na+离子从高功函数金属表面散射，观察到有效的中和，并且它不能用传统的自由电子模型来解释。为了解释这些实验数据，我们研究了速度依赖的中性分数与修改的Brako-Newns（BN）模型。计算结果与实验数据吻合较好。我们发现，平行速度效应在中和Li+和Na+离子的大角度散射中起着重要的作用。中性分数的非单调速度行为与原子能级与金属态之间依赖距离的耦合强度密切相关。
For Li+ and Na+ ions scattered from high work function metal surfaces, efficient neutralization is observed, and it cannot be explained by the conventional free electron model. In order to explain these experimental data, we investigate the velocity-dependent neutral fraction with the modified Brako–Newns (BN) model. The calculated results are in agreement with the experimental data. We find that the parallel velocity effect plays an important role in neutralizing the Li+ and Na+ ions for large angle scattering. The nonmonotonic velocity behavior of neutral fraction is strongly related to the distance-dependent coupling strength between the atomic level and metal states.