Forbidden line wavelengths and transition probabilities measured using an electron beam ion trap (EBIT)
Description:
Several coronal lines posed a long-standing riddle to earth-bound spectroscopists, until - following up on a suggestion by Grotrian (1937) - B. Edlen (1942) confirmed that their wavenumbers indeed corresponded to fine structure intervals in the ground configurations of highly charged ions like Fe X and Fe XI. This in turn caused turmoil in solar physics, because the corona must be much hotter than the underlying chromosphere in order to produce such ions. X-ray and EUV spectra of the sun became…
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Date:
September 10, 1998
Creator:
Beiersdorfer, P.; Gillaspy, J. D.; Serpa, F. G.; Trabert, E. & Utter, S. B.
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