atomic data, ISM, atoms, abundances, ultraviolet
We report accurate experimental absorption oscillator strengths (f-values) for transitions out of the ground level of Fe II to the z4Do7/2 and z4Do9/2 levels at 224.918 and 226.008 nm (air wavelengths) to be 0.00182(14) and 0.00244(19), respectively. The number in parenthesis is the uncertainty in the last digits. These two lines are important for studying Fe abundances and grain depletions in the interstellar medium. These f-values are determined by combining emission branching fractions with radiative lifetimes. Branching fractions are measured using classical spectroradiometry on an optically thin source. Radiative lifetimes are from the literature.
Original Publication Citation
S. D. Bergeson, K. L. Mullman, and J. E. Lawler. Oscillator strengths for Fe II transitions at 224.918 and 226.008 nanometers. Astrophys. J. 435 (2), L157-L159 (1994).
BYU ScholarsArchive Citation
Bergeson, Scott D.; Mullman, K. L.; and Lawler, J. E., "Oscillator Strengths for Fe II Transitions at 224.918 and 226.008 Nanometers" (1994). All Faculty Publications. 1827.
American Astronomical Society
Physical and Mathematical Sciences
Physics and Astronomy
© 1994 American Astronomical Society. This article is the Version of Record published by the American Astronomical Society in Astrophysical Journal in 1994, available online at
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