Volume 543, July 2012
|Number of page(s)||6|
|Section||Atomic, molecular, and nuclear data|
|Published online||12 July 2012|
Atomic data for astrophysics: Fe xiii soft X-ray lines⋆
1 DAMTP, Centre for Mathematical Sciences, Wilberforce Road, Cambridge, CB3 0WA, UK
2 Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
Received: 8 March 2012
Accepted: 14 May 2012
We present new large-scale R-matrix (up to n = 4) and distorted wave (up to n = 6) scattering calculations for electron collisional excitation of Fe xiii. We aim to provide accurate atomic data for the soft X-rays, where strong n = 4 → n = 3 transitions are present. As found in previous work on Fe x, resonances from within the n = 4 levels and cascading from higher levels significantly increase the intensities of these lines. We provide a number of models and line intensities, and list a number of strong unidentified lines.
Key words: atomic data / line: identification / Sun: corona / techniques: spectroscopic
The full dataset (energies, transition probabilities and rates) are available in electronic form at our APAP website (http://www.apap-network.org) as well as at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (188.8.131.52) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/543/A144
© ESO, 2012
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