Charge transfer in F2+ ions colliding with He atoms below keV energies andits reverse process - art. no. 052720

Charge transfer processes in collisions of F2+ ions with He atoms were stud ied by using the molecular representation below 600 eV energies. The ground F2+(S-4) State and one excited F2+(D-2) state are considered as the initia l channels in order to examine the effect of the excited state. We have als o investigated charge transfer processes in the reverse ion-ion collisions. Cross sections for nonradiative charge transfer in the ground quartet stat e F2++He collisions are found to increase gradually with the impact energy and reach around 2 x 10(-16) cm(2) at 558 eV, while those from the doublet state also show a gradual increase and stay nearly constant with 1.2 x 10(- 16) cm(2) at the same energy. Cross sections for the reverse processes for both symmetries are found to be very small with a magnitude less than 10(-1 9) cm(2) due to the strong Coulomb repulsion between two ions, but rapidly increase as the collision energy increases to reach 3 x 10(-17) and 10(-17) cm(2) for the quartet and doublet manifolds, respectively, at the highest energy studied.