中国物理B ›› 2014, Vol. 23 ›› Issue (2): 23402-023402.doi: 10.1088/1674-1056/23/2/023402
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
李绍晟, 王德华
Li Shao-Sheng (李绍晟), Wang De-Hua (王德华)
摘要: According to the closed-orbit theory, we study the influence of elastic interface on the photodetachment of H- near a metallic sphere surface. First, we give a clear physical description of the detached electron movement between the elastic interface and the metallic sphere surface. Then we put forward an analytical formula for calculating the photodetachment cross section of this system. Our study suggests that the photodetachment cross section of H- is changed with the distance between the elastic interface and H-. Compared with the photodetachment cross section of H- near a metallic sphere surface without the elastic interface, the cross section of our system oscillates and its oscillation is strengthened with the decrease of the distance from the elastic interface to H-. In additon, our calcuation results suggest that the influence of the elastic interface becomes much more significant when it is located in the lower half space rather than in the upper half space. Therefore, we can control the photodetachment of H- near a metallic sphere surface by changing the position of the elastic interface. We hope that our work is conducive to the understanding of the photodetachment process of negative ions near interfaces, cavities and ion traps.
中图分类号: (Interactions of atoms and molecules with surfaces)