A Helium Series in the Extreme Ultra-Violet

Details A Helium Series in the Extreme Ultra-Violet A Helium Series in the Extreme Ultra-Violet

Dec 1919

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1919natur.104..393h&link_type=abstract

Nature, Volume 104, Issue 2616, pp. 393 (1919).

Astronomy and Astrophysics

Astronomy

Scientific paper

IN NATURE for November 20 Prof. Lyman reports his observation of a helium line at 1640.1, as well as a weak one at 1215.1, close to the strong one 1216, and refers them to orders 3, 4 in the series 4N{1/22-1/m2}. If the correct reading for the strong line is nearer the 1215.1, the whole series m=4 ... 8 is found in his list of ultra-violet lines given in the Astro. Journ. (vol. xliii., p. 89, 1916). The following is the list of observed lines with deviations (obs.-calc.) from the calculated values, with N = 109720:-

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