Progress in electron-ion collisions studies

Some recent measurements of excitation of ions by electrons studied in beam-beam experiments are highlighted. The emphasis is on the study of the regularities of electron-ion scattering dynamics related to the excitation and decay of atomic autoionizing states both in electron and radiative channels. Some results are presented in comparison with the data obtained by other scientific groups and with existing theoretic calculations. The significant role of relativistic and correlation effects on dynamics of excitation process has been established.