Answers are grounded in this paper and cite their sources.
Solar X-ray spectra have been obtained during solar flares by OSO III (Orbiting Solar Observatory). New emission lines are observed in the spectral range from 1.3 to 20 A and are tentatively identified as transitions in Fe xxvi through Fe xx.
No takes yet. Share an insight, caveat, or question.
Neupert et al. (1967) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: