Abstract
THE sudden heating of a gas in a shock wave has often been used to study relaxation effects1–3. Most experiments on relaxation times for ionization have been carried out with inert gases, which have first ionization potentials in the range 12–24 V. These measurements have suggested1,4,5 that the atoms are ionized via excited states; but the results may have been influenced by the unknown effect of impurities.
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HILL, R., CAPP, B. Ionization Times in Shock-heated Potassium Vapour. Nature 208, 176–177 (1965). https://doi.org/10.1038/208176a0
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DOI: https://doi.org/10.1038/208176a0
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