Some experimental tests of the spectroscopic coupling scheme of C I

J. Musielok, G. Veres, W. L. Wiese

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Abstract

With a wall-stabilized arc source, we have measured the relative line strengths for various neutral carbon lines between electronic states with angular momentum quantum numbers l = 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. We 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.

Original languageEnglish
Pages (from-to)395-398
Number of pages4
JournalJournal of Quantitative Spectroscopy and Radiative Transfer
Volume57
Issue number3
DOIs
Publication statusPublished - Mar 1997

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ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy

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