Astron. Astrophys. Suppl. Ser.
Volume 137, Number 1, May II 1999
|Page(s)||165 - 173|
|Published online||15 May 1999|
Atomic data from the IRON Project*
XXXVIII. Electron impact excitation of the fine-structure transitions in the complex of Fe xv
Fakultät für Physik und Astronomie, Ruhr-Universität, D-44780 Bochum, Germany
2 Departamento de Física, Universidad Metropolitana, PO Box 76819, Caracas 1070A, Venezuela
3 UMR 8631 (associée au CNRS et à l'Université Paris 7) et DAEC, Observatoire de Paris, F-92195 Meudon, France
4 Centro de Física, Instituto Venezolano de Investigaciones Científicas (IVIC), PO Box 21827, Caracas 1020A, Venezuela
Send offprint request to: C.J. Zeippen
Accepted: 2 March 1999
As part of a systematic study of the collisional properties of Fe ions carried out by the IRON Project, electron excitation rates (effective collision strengths) are computed for all the fine-structure transitions within the complex of Fe xv in the electron temperature range . Configuration-interaction target wavefunctions are generated with the atomic structure code superstructure, and collision strengths are computed in the close-coupling approximation with a Breit–Pauli R-matrix package. Special care is taken to resolve the resonance structure and to ensure the convergence of the partial wave expansion, specially for dipole allowed transitions. By comparing with previously calculated collision strengths in the distorted wave approximation, a 20% accuracy rating is assigned to transitions with effective collision strengths .
Key words: atomic data / Sun: corona
A detailed Table 5 of the present effective collision strengths is only available in electronic form from the CDS via anonymous ftp 18.104.22.168 or via http://cdsweb.u-strasbg.fr/Abstract.html
© European Southern Observatory (ESO), 1999