Abstract
IT is a remarkable fact that of the three transitions of an electron in a mercury atom represented by 1S2p1, 1S 2p2 and 1S 2p3, we see optically only 1S2p2 (2536), while the other two, namely, 1S2p1 (2270) and 1S2p3 (2055), have not been observed at all except by the indirect method of measuring the ionisation by impacts of electrons on atoms by Franck and Einsporn (Zeit. f. Physik, ii. p. 18, 1920).
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TAKAMINE, T., FUKUDA, M. On the Mercury Line 2270 A. Nature 114, 382 (1924). https://doi.org/10.1038/114382a0
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DOI: https://doi.org/10.1038/114382a0
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