Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...354..755j&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 354, May 10, 1990, p. 755-762. Research supported by the Naturvetenskapliga
Astronomy and Astrophysics
Astrophysics
26
Absorption Spectra, Fourier Transformation, Infrared Radiation, Line Spectra, Solar Spectra, Fraunhofer Lines, Hollow Cathodes, Iron, Tables (Data), Atomic Processes Infrared: Spectra Laboratory Spectra Line Identifications Sun: Spectra
Scientific paper
The subconfiguration 3d64s(6D)4f of Fe I has been established by means of 360 combinations with 3d64s(6D)4d, observed in infrared Fourier transform spectra (1. 2.1 μm) of a hollow-cathode lamp. The level structure of the 4f configuration is best described in JK coupling, which is illustrated by the application of the quadrupolic approximation.
Nearly all of the newly identified infrared lines that are not obscured by telluric absorption appear in the Fraunhofer spectrum of the Sun. A comparison between the laboratory intensity and the solar absorption depth of the 4d-4f lines yields a sensitive test of the line identifications.
Johansson Sveneric
Learner Richard C. M.
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