Other
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.205...81d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 205, Oct. 1983, p. 81-90.
Other
28
Calcium, Electron Scattering, Line Spectra, Solar Flares, Collision Rates, Electron Density (Concentration), Solar Electrons, Spectroheliographs
Scientific paper
New electron impact collision rates are presented for transitions between the 10 lowest states of Ca XVII. These data are then used to predict Ca XVII level populations and emission-line intensity ratios for electron densities and temperatures appropriate to solar flares. A comparison is made with observations obtained with the NRL spectroheliograph aboard Skylab. For the intercombination to resonance line ratio the agreement is good. For other triplet to singlet ratios agreement is less satisfactory, possibly due to uncertainties in the observational data.
Doyle Gerry J.
Dufton Philip L.
Kingston A. E.
Widing Kenneth G.
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