WFRF:(Raassen A. J. J.)
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The FERRUM project: new experimental and theoretical f-values for 4p-4d transitions in FeII applied to HST spectra of chi Lupi
- Nilsson, H (author)
- Sikstrom, C. M (author)
- Li, Z. S (author)
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- Raassen, A. J. J (author)
- Johansson, S (author)
- Leckrone, D. S (author)
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- (creator_code:org_t)
- 2000
- 2000
- English.
- In: Astronomy & Astrophysics. - 0004-6361. ; 362:1, s. 410-418
- Journal article (peer-reviewed)
Abstract
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- Radiative lifetimes for six highly excited levels in Fe II have been measured at Lund Laser Centre applying the laser induced fluorescence technique and two-step excitation. The energy levels belong to the even-parity 3d(6)(D-5)(4)d subconfiguration at about 10 eV. Branching fractions (BF:s) of 29 transitions from these levels to the 3d(6)(D-5)4p subconfiguration at about 5 eV have been measured in the wavelength region 2000-3000 Angstrom with the Lund Fourier Transform Spectrometer. By normalizing the BF:s with the lifetimes we get experimental oscillator strengths for these 29 4p-4d lines. The oscillator strengths are compared with new theoretical calculations using the orthogonal operator technique and applied to high-resolution spectra of the star chi Lupi, recorded with the Hubble Space Telescope.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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- Nilsson, H
- Sikstrom, C. M
- Li, Z. S
- Lundberg, Hans
- Raassen, A. J. J
- Johansson, S
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- Leckrone, D. S
- Svanberg, Sune
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