2012/06/20 by Dehua Wang, De-hua Wang, Shao-Sheng Li +2 · 1 citation
Engineering · Physics and Astronomy · #Atomic physics #Experimental and Theoretical Physics Studies #Materials science #Metal #Nanotechnology #Physics #Quantum, superfluid, helium dynamics #Spacecraft and Cryogenic Technologies #Surface (topology)
paper · doi:10.1143/jpsj.81.074301
openalex publication_date 2012/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/26
We investigate the photodetachment of H - near a metallic nanosphere surface over a radius range of 5 to 280 nm. We present the electrostatic image potential of the detached electron caused by the metallic sphere surface, and then we study the classical motion of the photo-detached electron near a metallic sphere surface. The photodetachment cross-section of this system has been derived and calculated based on the closed orbit theory. The radius of the metallic sphere surface and the ion–surface distance have significant effects on the photodetachment of H - near a metallic sphere surface. For a certain ion–surface distance, the oscillating amplitude of the cross-section becomes strengthened as we increase the radius of the metallic sphere surface. In addition, for a given metallic sphere surface, the oscillation in the cross-section decreases with the increase in the ion–surface distance. Hence, we can control the photodetachment of H - near a metallic sphere surface by changing the radius of the sphere or the ion–surface distance. This study provides new understanding on the photodetachment process of negative ions in the presence of a sphere surface or cavities.