Double-charge-transfer cross sections in inelastic collisions of bare ions with helium atoms

Double-charge-transfer cross sections into singly and doubly excited states for collisions of α particles with helium atoms have been studied in the energy range of 50 to 500 keV/amu. We have also studied the double electron capture cross sections into ground states for collisions of 7Li3+ and 10B5+ with helium atoms. In our study we have applied the four-body boundary corrected continuum intermediate state approximation. The intermediate continuum states of each electron and static correlations of the electrons have been taken into account in this formalism. Present calculated results for total charge transfer cross sections for the reaction α+He and Li3++He compare favorably well with the existing experimental and other theoretical predictions. Due to the nonavailability of any theoretical and experimental finding for the reaction B5++He, the energy variation of capture cross sections into the ground state of B5+ ion has been shown within the same energy range. However, charge transfer cross sections into singly and doubly excited states of He are compared with the available theoretical observations only due to nonavailability of any experimental result. In this case as well, agreement is very encouraging