Volume 372, Number 3, June IV 2001
|Page(s)||1083 - 1087|
|Section||Catalogs and data|
|Published online||15 June 2001|
Atomic data from the IRON Project*
L. Electron impact excitation of Fe xix
Institut für Astronomie und Astrophysik, Scheinerstr. 1, 81679 München, Germany
2 UMR 8631 (associée au CNRS et à l'Université Paris 7) et DAEC, Observatoire de Paris, 92195 Meudon, France
Corresponding author: K. Butler, firstname.lastname@example.org
Accepted: 11 April 2001
Collision strengths and collisional rate parameters have been calculated for transitions among 92 and levels of O-like Fe xix. The method used is the Breit-Pauli R-matrix formalism in which most prominent relativistic effects are accounted for. Partial wave contributions up to are included explicitly while "top-up" procedures complete the sum to infinity. Several thousand energy points were used to fully incorporate the effect of resonances in the collisional cross sections when estimating the collisional rate parameters. This is particularly important at lower temperatures where the resonant contributions dominate. The present results are expected to be accurate to better than 20% for transitions among levels.
Key words: atomic and molecular data
© ESO, 2001
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