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CHIANTI-An Atomic Database for Emission Lines. VI. Proton Rates and Other Improvements

Young, P. R.; Mason, H. E.; Landini, M. +3 more

The CHIANTI atomic database contains atomic energy levels, wavelengths, radiative transition probabilities, and electron excitation data for a large number of ions of astrophysical interest. Version 4 has been released, and proton excitation data are now included, principally for ground configuration levels that are close in energy. The fitting pr…

New Identifications of Mn VI and Fe VII Vacuum Ultraviolet Lines

Feldman, U.; Ekberg, J. O.

The Solar Ultraviolet Measurements of Emitted Radiation (SUMER) spectrometer aboard the Solar and Heliospheric Observatory (SOHO) recorded a large number of spectra in the 500-1600 Å region. Although many of the detected lines have already been identified, the origins of a substantial fraction of the lines remain unknown. In this paper we report o…

Atomic Data and Spectral Line Intensities for S X

Bhatia, A. K.; Landi, E.

Electron impact collision strengths, energy levels, oscillator strengths and spontaneous radiative decay rates are calculated for S X. The configurations included are 2s²2p³, 2s2p⁴, 2p⁵, 2s²2p²3s, 2s²2p²3p, and 2s²2p²3d giving rise to 72 f…

Atomic Data and Spectral Line Intensities for S XI

Bhatia, A. K.; Landi, E.

Electron impact collision strengths, energy levels, oscillator strengths, and spontaneous radiative decay rates are calculated for S XI. The configurations included are 2s²2p², 2s2p³, 2p⁴, 2s²2p3l, and 2s²2p4l (l=s, p, d), giving rise to 72 fine-structure levels in intermediate coup…