Photodetachment of negative ion in a gradient electric field near a metal surface |
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Authors: | Liu Tian-Qi Wang De-Hua Han Cai Liu Jiang Liang Dong-Qi Xie Si-Cheng |
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Institution: | School of Physics, Ludong University, Yantai 264025, China |
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Abstract: | 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. |
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Keywords: | photodetachment metal surface gradient electric field closed orbit theory |
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