Energy and charge transfer for Na+ ions scattered from a Ag(001) surface

SURFACE SCIENCE

卷:635

Article

Ray, M. P.¹  Lake, R. E.^1,3  Marston, J. B.²  Sosolik, C. E.¹ 

[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

[3] Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, POB 14100, Aalto 00076, Finland

关键词: Ion-solid interactions;    Scattering;    Charge exchange;   

DOI  :  10.1016/j.susc.2014.11.024

来源: Elsevier

【 摘 要 】

We present energy- and charge-resolved measurements of low and hyperthermal energy Na+ ions scattered from a Ag(001) surface. With the primary ion beam oriented along the [110] crystal direction, distinct peaks in the energy distributions of the scattered beam flux that correspond to single or multiple collisions with target atoms are observed. A classical trajectory simulation reveals that these collisions can occur either at the surface or within the [110] channels, depending on incident beam energy. Within the simulation we probe the role of finite temperature and thermally displaced atoms on specific scattering events and show that contributions to the scattered distributions from single and double collisions dominate within the [110] channels. We also report velocity dependent measurements of the neutral/ion ratio of the scattered beam flux. A deviation between the data and simulated charge transfer results is observed for Na trajectories which penetrate the surface. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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