The FERRUM project: new experimental and theoretical f-values for 4p-4d transitions in FeII applied to HST spectra of chi Lupi
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2259068
- author
- Nilsson, H ; Sikstrom, C. M ; Li, Z. S ; Lundberg, Hans LU ; Raassen, A. J. J ; Johansson, S ; Leckrone, D. S and Svanberg, Sune LU
- organization
- publishing date
- 2000
- 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}}, }