Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26as...52...37m&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 52, April 1983, p. 37-62.
Astronomy and Astrophysics
Astrophysics
77
Astronomical Spectroscopy, Electron Transitions, Iron, Line Spectra, Transition Probabilities, Arc Heating, Carbonyl Compounds, Data Reduction, Plasma Diagnostics, Spectrum Analysis
Scientific paper
Relative oscillator strengths for 494 Fe II lines in the wavelength range 2550-5300 Å have been experimentally determined by use of a wall-stabilized arc operated in argon with a small admixture of iron carbonyl. Plasma temperature and electron density were about 9000K and 4.75×1015 cm-3 respectively. The relative gf-values were brought onto an absolute scale by use of the Saha equation and by comparing the intensity of a given Fe II line with those of neighbouring Fe I lines that are known rather precisely. The results are compared with available literature data. The author could derive additional Fe II gf-values, thus extending the wavelength range on both sides to 2030-7700 Å.
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