Issue |
Astron. Astrophys. Suppl. Ser.
Volume 137, Number 1, May II 1999
|
|
---|---|---|
Page(s) | 165 - 173 | |
DOI | https://doi.org/10.1051/aas:1999243 | |
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
1
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
Received:
10
December
1998
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
© European Southern Observatory (ESO), 1999