Charge Transfer and Electron Production inH−+H Collisions

The cross sections for charge transfer and electron production in collisions between hydrogen atoms and hydrogen negative ions (${\mathrm{H}}^{-}$) have been measured over the energy range 100 to 40 000 ev using modulated atomic-beam techniques in a crossed-beam experiment. Agreement of the experimental results with the perturbed-stationary-states calculation for charge transfer of Dalgarno and McDowell is quite satisfactory.