Electron excitation of hydrogenlike ions in the Coulomb Born approximation

We investigate the excitation of positive ions by charged-particle impact in the Coulomb Born approximation. We obtain closed-form expressions for the 1s-2s and 1s-2p amplitudes and present numerical results for the corresponding excitation cross sections. We also indicate how the matrix elements may be used to calculate excitation and ionization cross sections for many-electron ions.