Effect of dielectronic recombination excitation in the solar chromosphere-corona transition region.
Abstract
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
- Publication:
-
Journal of Quantitative Spectroscopy and Radiative Transfer
- Pub Date:
- August 1981
- DOI:
- 10.1016/0022-4073(81)90073-X
- Bibcode:
- 1981JQSRT..26..135C
- Keywords:
-
- Atomic Excitations;
- Chromosphere;
- Electron Impact;
- Electron Recombination;
- Solar Corona;
- Solar Spectra;
- Collision Rates;
- Electron States;
- Line Spectra;
- Radiative Transfer;
- Tables (Data);
- Transition Probabilities;
- Solar Physics;
- Atomic Processes:Solar Transition Region;
- Line Intensities:Solar Transition Region