Single and double charge exchange collision spectroscopy of O⁶⁺+He at 3.8 keV amu^-1

Abstract

Single and double electron transfer from He into the ground state ion O6+(1s2)1S0 and the metastable ion O6+(1s2s)3S1 have been studied in collisions at v=0.39 v0. The single capture takes place dominantly into the n=3 shell for both ions; for O6+(1s2s)3S1 the transfer excitation ending in O5+(1s2p3l) represents of the order of 10% of the core conserving capture. The single capture main features are similar for both ion configurations. The double capture into the ground state and the metastable ion is discussed, assuming that its main features (energy gain and thus binding energy) are also similar.