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arXiv 0908.1687physics.atom-phphysics.chem-ph
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场发射共振对表面负离子光剥离的调制

Modulation of Field Emission Resonance on photodetachment of negative ions on surface

Yan Han, Lifei Wang, Ningyu Yang, Shiyong Ran, Guangcan Yang

摘要:

用半经典理论研究了电场中场发射共振态与光致剥离电子的相互作用。在此框架下推导出了光剥离截面的解析表达式。发现斯塔克位移像态通过在光谱中增加不规则阶梯或平滑振荡来调制光剥离截面。当光脱附电子被捕获在斯塔克位移像势阱中时,脱附谱呈现不规则的阶梯结构,对应于修正的里德伯级数。当光剥离电子不受表面势阱束缚时,由于电子波被场或表面反射,截面只包含一个平滑的振荡。

英文摘要:

The interaction between the field emission resonance states and the photodetached electron in an electric field is studied by semiclassical theory. An analytical expression of the photodetachment cross section is derived in the framework. It is found that the Stark shifted image state modulates the photodetachment cross section by adding irregular staircase or smooth oscillation in the spectrum. When the photodetached electron is trapped in Stark shifted image potential well, the detachment spectrum displays an irregular staircase structure which corresponds to the modified Rydberg series. While the photodetached electron is not bound by the surface potential well, the cross secton contains only a smooth oscillation due to the reflection of electronic wave by the field or the surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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