Nature 221, 947 - 949 (08 March 1969); doi:10.1038/221947a0

Long Wavelength Satellites to the He-like Ion Resonance Lines in the Laboratory and in the Sun

A. H. GABRIEL & CAROLE JORDAN^*

Astrophysics Research Unit, Culham Laboratory, Abingdon, Berkshire.
^*Attached from: Department of Astronomy, University College, London.

SATELLITE lines, situated on the long wavelength side of the He-like resonance lines in laboratory plasmas, are classified here as transitions in highly excited Li-like ions. We also show that intense features in the solar X-ray spectrum, of similar appearance, are of different origin, and these are classified as the forbidden ls ^{2 1} S ₀–ls2s ³S₁ line of the He-like ion.

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