Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004head....8.0605g&link_type=abstract
American Astronomical Society, HEAD meeting #8, #06.05; Bulletin of the American Astronomical Society, Vol. 36, p.916
Astronomy and Astrophysics
Astrophysics
Scientific paper
A combined relativistic configuration interaction and second order many-body purterbation theory is applied to calculate the wavelengths of 3-> 2 transitions of L-shell Fe and Ni ions. A comparison of calculated n=2 level energies with experimental results indicates that these levels are accurate to within ˜± 0.1 eV. The calculated 3->2 transition wavelengths of L-shell Fe ions are compared with the expiremental measurements from Lawrence Livermore electron beam ion traps. It is found that the second order many-body purterbation corrections improve the wavelengths significantly over the standard relativistic configuration interaction calculations. A complete table of 3-> 2 line list is presented for L-shell ions of Fe and Ni, with estimated wavelength uncertainties of < 10 m{Å}. Such a table is expected to be useful in X-ray spectral analysis of a wide variety of astrophysical sources.
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