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.
Resume : Les spectres his par les ions de recul d'argon contiennent des raies provenant de la capture Slectronique due aux collisions secondaires entre ion de recul et atome neutre. Dans ce travail nous btudions 1'~volution de leur intensit6 en presence d'hel ium dans la cible gazeuse d'argon. Par ail leurs, une btude risolue dans le temps de l'imission nous a permis une analyse plus fine des spectres obtenus.
Radiation from argon with wavelength 8-85 nm has been measured with a grazing incidence spectrometer after excitation by 0.7 MeV/amu Cl11+ and 0.35 Mev/amu Cl9+ and Br14+. 417 lines have been identified. With a pulsed beam the radiation has been sorted into prompt and delayed fractions. Decay time analysis for separate peaks is correlated to charge state of the recoil ion. This leads especially to good assignment of Ar VII and Ar VIII lines. Delayed spectra do not depend much on projectile charge and velocity
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