Electron detachment from negative ions by charged particle collision. I. Proton impact

A theory is derived which accounts for the asymptotic effects of all Coulomb potentials occurring in the process of electron detachment from singly charged negative ions when olliding with charged particles. The T-matrix element of this process is redefined in a way which makes initial and final channel states asymptotically identical to the outgoing and ingoing scattering wavefunctions respectively. Calculations of doubly differential, simply differential and total cross sections with proton impact are compared with the results given by the Born approximation.