2016A&A...585A.118D


Query : 2016A&A...585A.118D

2016A&A...585A.118D - Astronomy and Astrophysics, volume 585A, 118-118 (2016/1-1)

Atomic data for astrophysics: Ni XII.

DEL ZANNA G. and BADNELL N.R.

Abstract (from CDS):

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. This includes the forbidden UV lines. The atomic data for the n=4 levels are the first to be calculated. We revise previous experimental energies, and suggest several new identifications. We point out the uncertainty in the wavelength of the 3s2 3p5 2P1/2-3s2 3p4 3d 2D3/2 transition, which is important for density diagnostics.

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Journal keyword(s): atomic data - techniques: spectroscopic - Sun: corona - line: identification

VizieR on-line data: <Available at CDS (J/A+A/585/A118): table1.dat table2.dat>

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2021.07.26-23:57:42

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