Photodetachment of negative ion in a gradient electric field near a metal surface

被引：7

作者：

Liu Tian-Qi ^{[1
]}

Wang De-Hua ^{[1
]}

Han Cai ^{[1
]}

Liu Jiang ^{[1
]}

Liang Dong-Qi ^{[1
]}

Xie Si-Cheng ^{[1
]}

机构：

[1] Ludong Univ, Sch Phys, Yantai 264025, Peoples R China

来源：

CHINESE PHYSICS B | 2012年 / 21卷 / 04期

基金：

中国国家自然科学基金;

关键词：

photodetachment; metal surface; gradient electric field; closed orbit theory; CROSS-SECTION; QUANTUM MANIFESTATIONS; CLASSICAL ORBITS; MAGNETIC-FIELDS; BIFURCATIONS; SPECTRA;

D O I：

10.1088/1674-1056/21/4/043401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on closed-orbit theory, the photodetachment of H- in a gradient electric field near a metal surface is studied. It is demonstrated that the gradient electric field has a significant influence on the photodetachment of negative ions near a metal surface. With the increase of the gradient of the electric field, the oscillation in the photodetachment cross section becomes strengthened. Besides, in contrast to the photodetachment of H- near a metal surface in a uniform electric field, the oscillating amplitude and the oscillating region in the cross section of a gradient electric field also become enlarged. Therefore, we can use the gradient electric field to control the photodetachment of negative ions near a metal surface. We hope that our results will be useful for understanding the photodetachment of negative ions in the vicinity of surfaces, cavities, and ion traps.

引用

页数：5

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