Conclusion
Using the methods of high resolving power spectroscopy, we established the existence of additional Doppler broadening of roughly 12% of the actual sodium spectral line contour of the Na I 589.0-nm line in the presence of cadmium vapors due to an increase in the kinetic energy of the radiating atoms caused by second-order collisions with metastable cadmium atoms in a hollow cathode discharge.
The estimates show that under the conditions of the given experiment, the share of second-order collisions is roughly 7% of all the collisions.
In association with the results cited in [1–5], the obtained data permit us to conclude that the increase in the intensity of certain spectral lines of the studied elements in a discharge with a hollow cathode and the decrease in their detection limits related to it with the introduction of cadmium atoms into the discharge can be caused by the effect of secondorder collisions of metastable cadmium atoms with atoms of impurity elements.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 46, No. 5, pp. 715–719, May, 1987.
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Rudnevskii, A.N., Cherednik, V.I. & Balykina, L.Y. The effect of cadmium vapors on the spectral line width of sodium in a hollow cathode discharge. J Appl Spectrosc 46, 427–430 (1987). https://doi.org/10.1007/BF00657360
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DOI: https://doi.org/10.1007/BF00657360