High-resolution V.U.V. spectroscopy of argon recoil ions induced by an ion beam

Spectra of argon recoil ions in the 9-85 nm wavelength range have been measured by impact of a heavy-ion beam on a neutral target. These spectra were analyzed by comparison with experimentally observed transitions, interpolations or extrapolations in isoelectronic sequences, theoretically calculated energy levels and quantum defect calculations. This led to identification of 417 lines and to determination of 75 new transitions, especially in argon VI and VII.