Volume 567, July 2014
|Number of page(s)||7|
|Section||Atomic, molecular, and nuclear data|
|Published online||04 July 2014|
Atomic data for astrophysics: Ni XV⋆
DAMTP, Centre for Mathematical Sciences, Wilberforce Road,
2 Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
Received: 28 February 2014
Accepted: 30 April 2014
We present the first R-matrix scattering calculation for electron collisional excitation of Ni xv. The large-scale target includes configurations up to n = 4. The calculations were carried out using the intermediate-coupling frame transformation method. Significant enhancements in the collision strengths, compared to previous distorted-wave (DW) calculations, are found for several cases, in particular the forbidden lines within the ground configuration and the 3s2 3p 4s levels. We provide a complete set of rates and a list of strongest lines that are observable in astrophysical plasmas. Previous identifications are reviewed, and a few new ones suggested. The new data can be used to accurately measure electron densities for high-temperature (3 MK) plasmas, and the nickel abundance.
Key words: atomic data / line: identification / techniques: spectroscopic / Sun: corona
The full dataset (energies, transition probabilities and rates) is available from our APAP website http://www.apap-network.org, and also at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (184.108.40.206) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/567/A18
© ESO, 2014
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.