On the transition rates of the Fe X and Fe XIV coronal lines

Details On the transition rates of the Fe X and Fe XIV coronal lines On the transition rates of the Fe X and Fe XIV coronal lines

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...415l..39t&link_type=abstract

Astronomy and Astrophysics, v.415, p.L39-L42 (2004)

Astronomy and Astrophysics

Astrophysics

12

Atomic Data, Sun: Corona, Techniques: Spectroscopic

Scientific paper

Despite a considerable scatter of the theoretical predictions of the M1/E2 transition rate of the ``red iron line'' (Fe X) in the solar corona, there is disagreement of all the results with the single measurement that used an electrostatic ion trap. Employing a heavy-ion storage ring for measuring the same transition in isoelectronic ions of Co, Ni, and Cu, the situation has been clarified, and a new, accurate data point for Fe X can be determined by extrapolation. This result agrees with the basic atomic structure prediction for the line strength in combination with the experimental transition energy. For the ``green iron line'' (Fe XIV), a recent measurement with an electron beam ion trap has resolved similar discrepancies.

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