Spectroscopy of Highly Charged Ions Using Complementary Techniques

Abstract

The far uv spectroscopy of highly ionised oxygen and argon has been studied with particular attention paid to core-excited metastable states. Emission from foil-excited MeV beams is compared with that following single- and double-electron capture into excited states during low-energy charge-exchange collisions of highly charged ions in helium and hydrogen targets. The use of complementary techniques aids in line identification through the high charge-state selectivity of the charge-exchange process, the use of lifetime measurements, and consideration of the different excitation and cascade processes involved, as well as systematics along isoelectronic sequences, and model-potential and multiconfigurational Dirac-Fock (MCDF) calculations. A number of new lines are reported.