Solar X-Ray Spectrum below 25 Angstroms

Science  20 Nov 1964:
Vol. 146, Issue 3647, pp. 1037-1038
DOI: 10.1126/science.146.3647.1037


Below 25 Å, the solar spectrum consists primarily of the emission lines of Fe XVII, O VIII, O VII, and N VII. The lines of the more highly ionized atoms, Fe XVII and O VIII, originate in localized active regions. Lines of O VII and N VII emanate from the full disk.