Computer Science
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jqsrt..26..135c&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 26, Aug. 1981, p. 135-145.
Computer Science
1
Atomic Excitations, Chromosphere, Electron Impact, Electron Recombination, Solar Corona, Solar Spectra, Collision Rates, Electron States, Line Spectra, Radiative Transfer, Tables (Data), Transition Probabilities
Scientific paper
The intensities of lines emitted from the solar chromosphere-corona transition region and observed on the earth are calculated by considering excitation of electrons to the upper level caused by electron-impact excitation and dielectronic recombination excitation processes. For the lines under investigation, the electron-impact deexcitation rates are negligibly small in comparison with spontaneous transition probabilities. Hence, electrons from the upper level deexcite through spontaneous transition only, emitting photons of wavelength corresponding to the energy difference between two levels. To determine the contribution of dielectronic recombination excitation (DRE) to the excitation mechanism, the calculations are repeated with exclusion of DRE. It is found that DRE contributes significantly and that its contribution may be much larger than that of electron-impact excitation
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