Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..101....1e&link_type=abstract
Astronomy and Astrophysics Supplement, Vol.101, NO.1/OCT.I, P. 1, 1993
Astronomy and Astrophysics
Astrophysics
46
Atomic Data, Fe Iii, Wavelengths, Transition Probabilities
Scientific paper
The three lowest configurations of the third spectrum of iron have been analyzed by using a low voltage sliding spark discharge and the 10.7-m normal incidence spectrograph at the National Institute of Standards and Technology, Washington, D.C. About 3200 lines, of which more than 1500 are new, have been observed as transitions between levels of 3d6, 3d54s and 3d54p. Almost all new lines are in the wavelength region 598 Å to 2105 Å. In these configurations 29 new levels have been found leaving only seven unidentified levels. From the obtained level energies wavelengths have been predicted with an uncertainty less than 0.005 Å for wavelengths shorter than 2100 Å. Theoretical transition probabilities have been calculated for these wavelengths and are presented.
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