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Hyperfine structure and isotope shift in Tl II with astrophysical applications

Johansson, Sveneric LU ; Kalus, Gabriele LU ; Brage, Tomas LU ; Leckrone, DS and Wahlgren, Glenn LU (1996) In Astrophysical Journal 462(2). p.943-947
Abstract
Fourier transform (FT) spectra of Tl II with resolved hyperfine structure (hfs) have been analyzed in the region 1790-3400 Angstrom. Measured isotope shifts (IS) for two transitions, including the S-1-P-3 intercombination line to the ground state at 1908.6 Angstrom are reported. Accurate Ritz wavelengths for isotope and hyperfine components of the S-1-P-1 resonance line at 1321.6 Angstrom are given. The accuracy is better than 0.3 m Angstrom for measured wavelengths and better than 0.4 m Angstrom for the Ritz wavelengths. Theoretical multi-configuration Dirac-Fock (MCDF) calculations, including core polarization, show that the LS-allowed 1321.6 Angstrom transition is a factor of 30 stronger than the intercombination line at 1908.6... (More)
Fourier transform (FT) spectra of Tl II with resolved hyperfine structure (hfs) have been analyzed in the region 1790-3400 Angstrom. Measured isotope shifts (IS) for two transitions, including the S-1-P-3 intercombination line to the ground state at 1908.6 Angstrom are reported. Accurate Ritz wavelengths for isotope and hyperfine components of the S-1-P-1 resonance line at 1321.6 Angstrom are given. The accuracy is better than 0.3 m Angstrom for measured wavelengths and better than 0.4 m Angstrom for the Ritz wavelengths. Theoretical multi-configuration Dirac-Fock (MCDF) calculations, including core polarization, show that the LS-allowed 1321.6 Angstrom transition is a factor of 30 stronger than the intercombination line at 1908.6 Angstrom. The application of the new Tl II data to astrophysical spectra obtained with the Hubble Space Telescope is discussed. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
individual (chi Lupi), stars, atomic data, identification, line, ultraviolet
in
Astrophysical Journal
volume
462
issue
2
pages
943 - 947
publisher
University of Chicago Press
external identifiers
  • wos:A1996UH18700035
ISSN
0004-637X
DOI
10.1086/177207
language
English
LU publication?
yes
id
df38ac15-dbcd-4e23-a694-94c86340b499 (old id 3919595)
date added to LUP
2013-07-09 08:37:31
date last changed
2016-04-16 04:20:02
@article{df38ac15-dbcd-4e23-a694-94c86340b499,
  abstract     = {Fourier transform (FT) spectra of Tl II with resolved hyperfine structure (hfs) have been analyzed in the region 1790-3400 Angstrom. Measured isotope shifts (IS) for two transitions, including the S-1-P-3 intercombination line to the ground state at 1908.6 Angstrom are reported. Accurate Ritz wavelengths for isotope and hyperfine components of the S-1-P-1 resonance line at 1321.6 Angstrom are given. The accuracy is better than 0.3 m Angstrom for measured wavelengths and better than 0.4 m Angstrom for the Ritz wavelengths. Theoretical multi-configuration Dirac-Fock (MCDF) calculations, including core polarization, show that the LS-allowed 1321.6 Angstrom transition is a factor of 30 stronger than the intercombination line at 1908.6 Angstrom. The application of the new Tl II data to astrophysical spectra obtained with the Hubble Space Telescope is discussed.},
  author       = {Johansson, Sveneric and Kalus, Gabriele and Brage, Tomas and Leckrone, DS and Wahlgren, Glenn},
  issn         = {0004-637X},
  keyword      = {individual (chi Lupi),stars,atomic data,identification,line,ultraviolet},
  language     = {eng},
  number       = {2},
  pages        = {943--947},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {Hyperfine structure and isotope shift in Tl II with astrophysical applications},
  url          = {http://dx.doi.org/10.1086/177207},
  volume       = {462},
  year         = {1996},
}