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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 ; Sikstrom, C. M ; Li, Z. S ; Lundberg, Hans LU ; Raassen, A. J. J ; Johansson, S ; Leckrone, D. S and Svanberg, Sune LU (2000) In Astronomy & Astrophysics 362(1). p.410-418
Abstract
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... (More)
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. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Astronomy & Astrophysics
volume
362
issue
1
pages
410 - 418
publisher
EDP Sciences
external identifiers
  • scopus:0008546659
ISSN
0004-6361
language
English
LU publication?
yes
id
2018179e-c52d-432c-bb83-18aeb6a5512e (old id 2259068)
alternative location
http://dare.uva.nl/document/35398
date added to LUP
2016-04-04 09:12:20
date last changed
2022-01-29 08:44:36
@article{2018179e-c52d-432c-bb83-18aeb6a5512e,
  abstract     = {{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.}},
  author       = {{Nilsson, H and Sikstrom, C. M and Li, Z. S and Lundberg, Hans and Raassen, A. J. J and Johansson, S and Leckrone, D. S and Svanberg, Sune}},
  issn         = {{0004-6361}},
  language     = {{eng}},
  number       = {{1}},
  pages        = {{410--418}},
  publisher    = {{EDP Sciences}},
  series       = {{Astronomy & Astrophysics}},
  title        = {{The FERRUM project: new experimental and theoretical f-values for 4p-4d transitions in FeII applied to HST spectra of chi Lupi}},
  url          = {{https://lup.lub.lu.se/search/files/5260322/2297485.pdf}},
  volume       = {{362}},
  year         = {{2000}},
}