Abstract
Augerelectron emission from foil-excited Ne-ions (6 to 10 MeV beam energy) has been measured. The beam-foil time-of-flight technique has been applied to study electronic transitions of metastable states (delayed spectra) and to determine their lifetimes. To achieve a line identification for the complex structure observed in the prompt spectrum, the spectrum is separated into its isoelectronic parts by an Augerelectron-ion coincidence correlating the emitted electrons and the emitting projectiles of well defined final charge statesq f . Well resolved spectra were obtained and the lines could be identified using intermediate coupling Dirac-Fock multiconfiguration calculations.
From the total KLL-Augerelectron transition probabilities observed in the electron-ion coincidence experiment for Ne (10 MeV) the amount of projectiles with oneK-hole just behind aC-target can be estimated. For foil-excited Ne-projectiles in contrast to single collision results the comparison of transition intensities for individual lines with calculated transition probabilities yields a statistical population of Li- and Be-like configurations.
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Supported by Bundesministerium für Forschung und Technologie.
The authors appreciate M.H. Chen's and B. Crasemann's valuable calculations and thank them, P. Armbruster, C.P. Bhalla, and Gy. Szabó for stimulating comments and discussions.
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Schumann, S., Groeneveld, K.O., Nolte, G. et al. EquilibriumK-shell excitation of highly ionized neon. Z Physik A 289, 245–254 (1979). https://doi.org/10.1007/BF01415784
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DOI: https://doi.org/10.1007/BF01415784