Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apjs...28..465c&link_type=abstract
Astrophysical Journal Supplement Series (Supplement no. 272), vol. 28, Dec. 1974, p. 465-470.
Astronomy and Astrophysics
Astrophysics
19
Atomic Excitations, Forbidden Transitions, Line Spectra, Solar Corona, Solar Spectra, Transition Probabilities, Atomic Collisions, Density Distribution, Electron Density (Concentration), Electron Energy, Electron Transitions, Emission Spectra, Ion Density (Concentration), Tables (Data)
Scientific paper
Some new data pertinent to forbidden transitions for coronal lines of S XII, Ca XIII, K XI, Mn XIII, Fe XIV, Co XV, Ni XVI, N XV, Cr IX, Fe X, and Ni XII are presented. We include additional calculations of collision strengths for a number of ions and then set up and solve the equations of statistical equilibrium in the limiting approximations in which contributions to level population by cascade from higher levels are neglected. We then calculate volume emissivities per ion as a function of density and temperature.
Aller Lawrence H.
Czyzak Stanley J.
Euwema Robert N.
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