THE SPECTRUM OF Fe II

Journal Article · Tue Jan 15 04:00:00 EST 2013 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/204/1/1· OSTI ID:22089733

Nave, Gillian ^[1]; Johansson, Sveneric ^[2]

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1. National Institute of Standards and Technology, Gaithersburg, MD 20899-8422 (United States)
2. Lund Observatory, University of Lund, Box 43, SE-22100 Lund (Sweden)

The spectrum of singly ionized iron (Fe II) has been recorded using high-resolution Fourier transform (FT) and grating spectroscopy over the wavelength range 900 A to 5.5 {mu}m. The spectra were observed in high-current continuous and pulsed hollow cathode discharges using FT spectrometers at the Kitt Peak National Observatory, Tucson, AZ and Imperial College, London and with the 10.7 m Normal Incidence Spectrograph at the National Institute of Standards and Technology. Roughly 12,900 lines were classified using 1027 energy levels of Fe II that were optimized to measured wavenumbers. The wavenumber uncertainties of lines in the FT spectra range from 10{sup -4} cm{sup -1} for strong lines around 4 {mu}m to 0.05 cm{sup -1} for weaker lines around 1500 A. The wavelength uncertainty of lines in the grating spectra is 0.005 A. The ionization energy of (130,655.4 {+-} 0.4) cm{sup -1} was estimated from the 3d{sup 6}({sup 5}D)5g and 3d{sup 6}({sup 5}D)6h levels.

• OSTI ID: 22089733
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 1 Vol. 204; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
79 ASTRONOMY AND ASTROPHYSICS
ABSORPTION SPECTRA
ABSORPTION SPECTROSCOPY
ASTROPHYSICS
EDUCATIONAL FACILITIES
ENERGY LEVELS
FOURIER TRANSFORMATION
HOLLOW CATHODES
HYDROGEN 6
IONIZATION
IRON IONS
RESOLUTION
WAVELENGTHS