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The FERRUM Project: Experimental oscillator strengths of the UV 8 multiplet and other UV transitions from the y6P levels of Fe II
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- Pickering, J. C. (författare)
- Physics Department, Blackett Laboratory, Imperial College, London SW7 2BZ, UK
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- Donnelly, M. P. (författare)
- Department of Mathematics, Queen's University of Belfast, Northern Ireland
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- Nilsson, Hampus (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Atomic Astrophysics, Lund Observatory, Lund University, PO Box 43, SE-22100 Lund, Sweden
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- Hibbert, A. (författare)
- Department of Mathematics, Queen's University of Belfast, Northern Ireland
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- Johansson, Sveneric (författare)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science,Atomic Astrophysics, Lund Observatory, Lund University, PO Box 43, SE-22100 Lund, Sweden
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(creator_code:org_t)
- 2002-12-03
- 2002
- Engelska.
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Ingår i: Astronomy & Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 396:2, s. 715-722
- Relaterad länk:
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We report on experimental branching fractions (BFs) for 19 transitions from the three 3d 5( 6S)4s4p( 3P) y6P levels in Fe II, measured in Fourier transform spectra of a Penning discharge lamp and a hollow cathode lamp. The transition wavelengths span the interval between 1600 and 2850 Å. Absolute oscillator strengths ( f-values) have been derived by combining the BFs with experimental radiative lifetimes recently reported in the literature. Theoretical f-values have been calculated using configuration interaction wavefunctions. The new experimental and theoretical f-values are compared with data available in the literature and in databases. The strongest lines measured belong to the UV 8 multiplet of Fe II, which has one ground state transition appearing as a prominent feature at 1608 Å in interstellar spectra. The line is accompanied by a satellite at 1611 Å due to a level mixing, which is discussed in the paper.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Nyckelord
- atomic data -- line: identification -- techniques: spectroscopic -- stars: abundances -- ISM: abundances
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