Evidence for the incoming-velocity effect on negative fluorine ions scattering from a highly-oriented-pyrolytic-graphite surface
Evidence for the incoming-velocity effect on negative fluorine ions scattering from a highly-oriented-pyrolytic-graphite surface
复制标题
入射速度对高取向热解石墨表面散射负氟离子影响的证据
DOI：
10.1103/physreva.88.044901
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发表时间：
2013-10
影响因子：
2.9
通讯作者：
Chen, Ximeng
中科院分区：
文献类型：
--
作者：
Xiong, Feifei;Zhou, Hu;Guo, Yanling;Chen, Ximeng
已经测量了以 38 度的散射角在石墨表面上散射的 keV 能量氟负离子的负离子分数，该分数取决于入射能量和角度。对于镜面散射，该分数随着入射能量的增加而单调增加。一个具体特征是分数随入射角变化的非单调角度依赖性。它强烈地表明了相互作用与时间相关的电子转移过程。分析实验结果时考虑了入射速度效应，发现了指数缩放。
Negative-ion fractions depending on incident energies and angles have been measured for keV-energy fluorine negative ions scattering on a graphite surface at a scattering angle of 38 degrees. For specular scattering, the fraction increases monotonously with increasing incident energy. A specific feature is the nonmonotonic angular dependence of the fraction with the variation of incident angles. It strongly indicates the interaction-time-dependent electron transfer process. The incident-velocity effect has been taken into account to analyze the experimental results, in which an exponential scaling is found.