J/A+A/514/A40 IRON project. LXVIII (Del Zanna+, 2010)
Atomic data from the IRON project. LXVIII. Electron impact excitation of FeXI.
Del Zanna G., Storey P.J., Mason H.E.
<Astron. Astrophys., 514, A40-40 (2010)>
=2010A&A...514A..40D 2010A&A...514A..40D (SIMBAD/NED BibCode)
ADC_Keywords: Atomic physics
Keywords: atomic data - line: identification - techniques: spectroscopic
Abstract:
A new R-matrix scattering calculation for electron collisional
excitation of Fe XI is presented and compared to earlier calculations.
The calculation includes 145 LS terms and 465 fine-structure levels
and uses the intermediate-coupling frame transformation method (ICFT).
We discuss the strong interactions that exist between three J=1 levels
in the 3s2 3p3 3d electron configuration. These levels give rise to
strong lines in the EUV spectrum and their energies and
identifications have been the source of much confusion in the
literature. We show that the oscillator and collision strengths
linking these levels to the ground levels of the ion are very
sensitive to the choice of configuration basis and argue that most
earlier calculations have failed to represent these levels adequately.
Description:
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* Sorry, but the author(s) never supplied the tabular material *
* (detailed tables) as announced in the paper. *
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Author's address:
Giulio Del Zanna,
(End) Patricia Vannier [CDS] 12-Jul-2010