Understanding charge transfer of Li+ and Na+ ions scattered from metal surfaces with high work function

doi:10.1088/1674-1056/25/8/083401

Abstract 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.

Keywords: neutralization alkali-metal ion metal surface scattering

Received: 13 February 2016
Revised: 25 April 2016
Accepted manuscript online:

PACS:	34.35.+a	(Interactions of atoms and molecules with surfaces)
	34.70.+e	(Charge transfer)
	78.70.-g	(Interactions of particles and radiation with matter)
	34.10.+x	(General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.))

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11405078 and 11474140), the Fundamental Research Funds for the Central Universities, China (Grant Nos. lzujbky-2014-169 and lzujbky-2015-244), the Project sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, the State Education Ministry, and the National Students' Innovation and Entrepreneurship Training Program (Grant Nos. 201410730069 and 201510730078).

Corresponding Authors: Xi-Meng Chen
E-mail: chenlin@lzu.edu.cn

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Lin Chen(陈林), Wen-Bin Wu(武文斌), Pin-Yang Liu(刘品阳), Yun-Qing Xiao(肖云青), Guo-Peng Li(李国朋), Yi-Ran Liu(刘亦然), Hao-Yu Jiang(江浩雨), Yan-Ling Guo(郭艳玲), Xi-Meng Chen(陈熙萌) Understanding charge transfer of Li⁺ and Na⁺ ions scattered from metal surfaces with high work function 2016 Chin. Phys. B 25 083401

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Understanding charge transfer of Li+ and Na+ ions scattered from metal surfaces with high work function

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Understanding charge transfer of Li⁺ and Na⁺ ions scattered from metal surfaces with high work function