Some experimental tests of the spectroscopic coupling scheme of C I.

Details Some experimental tests of the spectroscopic coupling scheme of C I. Some experimental tests of the spectroscopic coupling scheme of C I.

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jqsrt..57..395m&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 57, issue 3, pp. 395-398

Physics

9

Carbon: Atomic Processes, Carbon: Line Intensities, Carbon: Laboratory Spectra

Scientific paper

With a wall-stabilized arc source, the authors have measured the relative line strengths for various neutral carbon lines between electronic states with angular momentum quantum numbers I = 0, 1, 2 (s, p, d) and principal quantum numbers 3, 4 and 5, in order to provide some experimental data on the spectroscopic coupling situation for this spectrum. C I is of interest because it is the first element in the periodic table for which calculations have predicted significant departures from LS-coupling line strengths for prominent transitions, while lighter atoms and ions adhere quite closely to the LS-coupling scheme. The authors have found indeed that for 3p-4d and 3p-5s lines the deviations of the measured line strengths from LS-coupling values become large, while the agreement with recent intermediate coupling calculations is very good.

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