Abstract
IN supplement to my letter in NATURE of Mar. 30, p. 488, under the above title, I have now made a series of experiments, starting with mercury resonance radiation under typical conditions at room temperature. As the temperature of the mercury is progressively raised, and a rapid stream of vapour is generated, the secondary source, originally symmetrical on either side of the primary beam, begins gradually to elongate on the down stream side, until finally it is wholly on this side, being traceable for a distance of about 3 cm. down stream.
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RAYLEIGH Excitation of Mercury Vapour by the Resonance Line. Nature 123, 569 (1929). https://doi.org/10.1038/123569a0
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DOI: https://doi.org/10.1038/123569a0
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