Laboratory identification of the 3S(2)3P(2) (3)P2,1-3S3P(3) (5)S2(0) intersystem lines of S III

Details Laboratory identification of the 3S(2)3P(2) (3)P2,1-3S3P(3) (5)S2(0) intersystem lines of S III Laboratory identification of the 3S(2)3P(2) (3)P2,1-3S3P(3) (5)S2(0) intersystem lines of S III

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277l..79s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 277, Feb. 15, 1984, p. L79-L81. Research supported

Astronomy and Astrophysics

Astronomy

23

Atomic Spectra, Line Spectra, Sulfur, Ultraviolet Astronomy, Ultraviolet Spectra, Atomic Energy Levels, Cosmic Plasma, Io, Iue, Plasma Diagnostics, Solar Spectra

Scientific paper

The spin-changing triple-quintet intersystem lines of S III have been identified in laboratory spectra for the first time. The wavelengths are 1728.939 and 1713.117 A with an uncertainty of plus-or-minus 5 mA. These values are about 250 times more precise than those from the IUE spectra of the Io torus where these lines were first detected. The 1728.939 line is coincident with strong, previously unidentified features in the spectrum of the sun, RR Tel, and V 1016 Cyg. The 1713.117 line and an Fe II line at 1712.997 A form barely resolvable doublets in the latter two spectra. The S III intersystem lines are likely to be density sensitive and therefore a potential new diagnostic for astrophysical plasmas.

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