Astron. Astrophys. Suppl. Ser.
Volume 126, Number 1, November II 1997
|Page(s)||105 - 111|
|Published online||15 November 1997|
Atomic data from the IRON Project
XXIV. Electron excitation of Li-like Fe xxiv between the n = 2 and = 2, 3, 4 fine-structure levels
Department of Applied Mathematics & Theoretical Physics, The Queen's University of Belfast, Belfast BT7 1NN, UK
2 Département G.D. Cassini, Observatoire de la Côte d'Azur, BP. 4229, 06304 Nice Cedex 4, France
Accepted: 3 March 1997
Collision strengths for electron induced transitions in Li-like Fe xxiv are calculated using a Breit-Pauli R-matrix technique. The target has 15 fine structure states corresponding to . Autoionizing resonances are found to affect 18 of the 39 collision strengths, namely those for transitions where The present calculation is carried out only for electrons incident on the ground state with energies not exceeding 265 Ry. Beyond this we use the relativistic distorted wave collision strengths of Zhang et al. in order to complete our results. Thermally averaged collision strengths are computed and tabulated as functions of for transitions out of the , and states. The temperature range considered is , Fe xxiv having its maximum coronal abundance when .
Key words: Li-like iron / electron collision / atomic data
© European Southern Observatory (ESO), 1997