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It is shown experimentally that none of the alkali metals will allow radio-frequency oscillations to be generated across an arc in hydrogen, but that the alkaline earths will do so: a confirmation and extension of previous work. Spectra have been photographed of the two groups of elements when burned in the hydrogen arc, and the intensification and reduction of the lines of various elements is described. The effect of a minute quantity of Mg in large amounts of Rb and Na is described in detail, as well as the method by a quantitative estimate of the amount might be reached. No satisfactory explanation for the complicated phenomena of the oscillating arc has yet been found.
Physical Review – American Physical Society (APS)
Published: Oct 15, 1930
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