Neutralization of low energy Na plus ions in grazing scattering on clean and water covered Cu(110) surfaces

作者：Wang, Lei; Sun, Guangzhi; Liu, Xuan; Guo, Xinyue; Wei, Mingxuan; Qiu, Shunli; Yin, Liyuan; Zhang, Zheng; Chen, Ximeng; Guo, Yanling^*; Luo, Wei^*; Chen, Lin^*

来源：Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms , 2021, 497: 10-14.

DOI：10.1016/j.nimb.2021.03.022

• Resonant charge transfer
• Neutralization
• Alkali-metal ions
• Metal surfaces
• Free-electron-gas model
• Ion surface scattering

keV-energy Na+ ions are scattered from clean and water covered Cu(1 1 0) surfaces in grazing incidence. For both surfaces the pronounced Na+ fractions decrease with incident energy. In particular, the lower Na+ fraction has been observed for the water covered Cu(1 1 0) surface. The simple calculations using rate equation are presented to compare with the experimental data. The calculation is in agreement with the experimental data. It indicates that the water covered Cu(1 1 0) surface has the slightly higher work function due to water molecules dissociation and forming hydroxyl groups, so that the neutral fraction on water covered Cu(1 1 0) is lower than that on the clean surface.

• 单位
  武汉第二船舶设计研究所; 兰州大学; 三峡大学