Differential cross sections for the production of H atoms in collisional electron detachment ofH−ions on He, H, andH2targets

The differential cross sections for collisional electron detachment of ${\mathrm{H}}^{-}$ ions by He, H, and ${\mathrm{H}}_2$ targets in the 100-keV-10-MeV energy region is investigated. The summation over all the final states which contribute to electron detachment is carried out in the closure approximation using the concept of the average energy loss at a fixed scattering angle. In the Born approximation, the differential cross section for electron-detachment collisions is strongly peaked in the forward direction. We have also studied nondetachment collisions in the Born approximation. One of the interesting features associated with nondetachment collisions is the zero in the differential cross section near the forward direction. Results for the total electron-detachment cross section are also presented and compared with experiment where measurements are available.