Photodetachment of Di-atomic Negative Ion H₂⁻ near a Surface

We describe the effects of plane surface on the photo-detached electron spectra from H₂⁻. A z−polarized laser is used for the detachment of electrons. The detached electron flux and photodetachment cross section are derived. There exists strong dependence on the distance of the H₂^- from the surface and also on the separation of atomic centers of H₂⁻. The results show strong oscillations for smaller values of distances, whereas for larger values the oscillating structure disappears.