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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 28, Iss. 4 — Apr. 1, 2011
  • pp: 737–745

Wavelengths of the 3 d 6 ( D 5 ) 4 s a D 6 3 d 5 ( S 6 ) 4 s 4 p y P 6 multiplet of Fe II (UV 8)

Gillian Nave and Craig J. Sansonetti  »View Author Affiliations

JOSA B, Vol. 28, Issue 4, pp. 737-745 (2011)

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We investigate the wavenumber scale of Fe I and Fe II lines using new spectra recorded with Fourier transform spectroscopy and a reanalysis of archival spectra. We find that standards in Ar II, Mg I, Mg II, and Ge I give a consistent wavenumber calibration. We use the recalibrated spectra to derive accurate wavelengths for the a D 6 y P 6 multiplet of Fe II (UV 8) using both directly measured lines and Ritz wavelengths. Lines from this multiplet are important for astronomical tests of the invariance of the fine-structure constant on a cosmological time scale. We recommend a wavelength of 1608.45081 Å with one standard deviation uncertainty of 0.00007 Å for the a D 6 9 / 2 y P 6 7 / 2 transition.

OCIS Codes
(300.6210) Spectroscopy : Spectroscopy, atomic
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

ToC Category:

Original Manuscript: November 29, 2010
Revised Manuscript: January 18, 2011
Manuscript Accepted: January 18, 2011
Published: March 15, 2011

Virtual Issues
April 14, 2011 Spotlight on Optics

Gillian Nave and Craig J. Sansonetti, "Wavelengths of the 3d6(5D)4s a6D−3d5(6S)4s4p y6P multiplet of Fe II (UV 8)," J. Opt. Soc. Am. B 28, 737-745 (2011)

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