XUV spectrum of C I observed from Skylab during a solar flare

摘要: An intense spectrum of Ci in the wavelength region from 1100 to 2000 A has been recorded by Naval Research Laboratory normal incidence spectrograph flown on Skylab. The source was a large solar flare. spectral resolution about 20000 at 1200 A. We have identified 69 new lines Ci, and determined 63 energy levels. arise transitions upper levels high principal quantum number n where ≳ 6. list 193 observed between 1140 1931 is presented, as well calculated wavelengths for an additional 109 2s2 2p2 3P0,1,2 fall 1102 were not flare due low instrumental efficiency these wavelengths. relative accuracy most ±0.004 intensities C i are qualitatively compared with corresponding laboratory spectrum.