Keywords :
atomic data - techniques spectroscopic - Sun: corona - line: identification -
Abstract:We present new large-scale R-matrix (up to n=4) scattering calculations for the electron collisional excitation of Cl-like NiXII. We used the intermediate-coupling frame transformation method. We compare predicted and observed line intensities using laboratory and solar spectra, finding good agreement for all the main soft X-ray lines. With the exception of the three strongest transitions, large discrepancies with previous estimates are found, especially for the decays from the lowest 3s2 3p4 3d levels.
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