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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
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
2012-02-17 22:50:01
date last changed
2016-10-13 04:25:59
@misc{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    = {ARRAY(0x980af38)},
  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},
  volume       = {362},
  year         = {2000},
}