Electron capture in collisions of Li³⁺ ions with ground andexcited states of Li atoms

The electron capture processes in collisions of Li³⁺ ion with Li(1s²2s) and Li(1s²2p_0,1) are investigated by using the two-center atomic orbital close-coupling method in the energy range from 0.1 keV/u to 300 keV/u. The interaction of the active electrons with the target ion is represented by a model potential. The present results for the Li³⁺-Li(1s²2s) system are compared with the available theoretical data and general agreement is obtained for the high collision energies. It is also found that the total and partial electron capture cross sections are sensitive to the initial charge cloud alignment in the low energy region.