Dielectronic satellite spectra for highly charged helium-like ions. V - Effect of total satellite contribution on the solar flare iron spectra

Details Dielectronic satellite spectra for highly charged helium-like ions. V - Effect of total satellite contribution on the solar flare iron spectra Dielectronic satellite spectra for highly charged helium-like ions. V - Effect of total satellite contribution on the solar flare iron spectra

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..801b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 189, Dec. 1979, p. 801-816.

Physics

103

Electron Transitions, Iron, Solar Flares, Solar Spectra, Line Spectra, Solar Physics, Transition Probabilities, Wavelengths, X Ray Spectra

Scientific paper

For satellites of the type 1s2nl-1s 2pnl in Fe XXIV, wavelengths and intensities have been calculated for n = 4. Together with previous calculations for n = 2 and 3, these enable the wavelengths and decay rates to be scaled for higher values of n. The series up to n = 11 for satellites of the resonance line 1s2 1s2p 1P1, and up to n = 16 for satellites of the inter- combination line 1s2-ls 2p 3P1, have been derived. This leads to a good estimate for the contribution of satellites to the apparent wavelength shift, width, and intensity of the resonance line, and thus to a value of the correction factor a needed for deriving electron temperature from satellite! resonance line ratios, as described in Papers I and II in this series. Also obtained, from the sum of all the satellites, is a new value for the major contribution ( 90 per cent) to the total dielectronic recombination rate. At typical flare temperatures of 20 × 106 K, this is greater by a factor of two than values obtained from earlier semi-empirical formulae.

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