Abstract
The level population is found to contain anomalously high populations of displaced levels below the ionization limit, especially 4p′4Po. This is considered to be due to electron-ion combination. Some aspects of the excitation of copper ion lines in helium and argon are reported. Possible excitation mechanisms are discussed.
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I am indebted to Professor V. S. Rossikhin for interest in the work and useful discussions.
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Ostroumenko, P.P. Some aspects of the excitation of copper lines in a hollow-cathode discharge. J Appl Spectrosc 5, 426–428 (1966). https://doi.org/10.1007/BF00608866
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DOI: https://doi.org/10.1007/BF00608866