CALCULATION AND ANALYSIS OF THE ELECTRON-IMPACT IONIZATION CROSS SECTIONS FOR AI~(M+)

Electron-impact ionization cross sections for the 1s22s, 1s22p state of lithium-like aluminium are calculated by using distorted wave package, the inner-shell-exci-Cation-autoionization contribution is included in the final results. In this paper the electron-impact excitation cross sections and photoionization cross sections of the above two states are also given. It is shown that the ionization cross sections near threshold can joint smoothly with the corresponding excitation cross section and also meet the integrals of photoionization cross sections as the energy of the incidental electron become infinite.