Excitation of the Fe XII spectrum in the solar corona

Details Excitation of the Fe XII spectrum in the solar corona Excitation of the Fe XII spectrum in the solar corona

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..163f&link_type=abstract

Astronomy and Astrophysics, vol. 54, no. 1, Jan. 1977, p. 163-166.

Astronomy and Astrophysics

Astrophysics

50

Atomic Excitations, Iron, Line Spectra, Radiative Transfer, Solar Corona, Transition Probabilities, Atomic Collisions, Electron Density (Concentration), Electron Energy, Emission Spectra, Fine Structure, Ion Motion, Solar Spectra

Scientific paper

Radiative transition probabilities and collision strengths have been calculated for transitions within the ground 3s(2)3p(3) configuration of Fe(11+) and between the ground and excited 3s3p(4), 3s(2)3p(2)3d configurations. The collision calculations were performed in LS coupling, and the resultant R-matrix was then transformed into an intermediate-coupling representation to obtain collision strengths between fine-structure levels. The results obtained enable the populations of the levels of the ground configuration to be reliably calculated. The relative intensities of transitions within the ground configuration are good indicators of the coronal electron density.

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