中国物理B ›› 2012, Vol. 21 ›› Issue (7): 73202-073202.doi: 10.1088/1674-1056/21/7/073202
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
唐田田, 王德华, 王姗姗
Tang Tian-Tian(唐田田), Wang De-Hua(王德华)†, and Wang Shan-Shan(王姗姗)
摘要: According to the semi-classical theory, we study the photodetachment microscopy of H- in the electric field near a metal surface. During the photodetachment, the electron is photo-detached by a laser and the electron is drawn toward a position-sensitive detector. The electron flux distribution is measured as a function of position. Two classical paths lead the ion to any point in the classically allowed region on the detector, and waves traveling along these paths produce an interference pattern. If the metal surface perpendicular to the electric field is added, we find that the interference pattern is related not only to the electron energy and the electric-field strength, but also to the ion--surface distance. Besides, the laser polarization also has a great influence on the electron flux distribution. We present calculations predicting the interference pattern that may be seen in experiment. We hope that our study can provide a new understanding of the electron flux distribution of negative ions in external field and surface, and can guide the future experimental research on the negative ion photo-detachment microscopy.
中图分类号: (Photodetachment of atomic negative ions)