Abstract
The present paper concerns the effects of various impurities present in specimens on the conditions of sulfur, chlorine, and bromine spectrum excitation in a low-voltage discharge with graphite electrodes. The spectral line intensities of these elements increase with increasing atomic weights and decreasing ionization potentials of the impurities. The observed effect can be attributed to temperature changes, the influence of plasma composition on the excitation spectra by way of ionization processes, and the reduced rate of discharge channel expansion.
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Berezin, I.A. Effect of impurities on the excitation of sulfur and halogen spectra in a low-voltage spark. J Appl Spectrosc 3, 376–379 (1965). https://doi.org/10.1007/BF00614639
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DOI: https://doi.org/10.1007/BF00614639