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Laboratory Measurements of Fe XXIV L-Shell Line Emission

Savin, Daniel Wolf; Beiersdorfer, P.; Lopez-Urrutia, J. Crespo; Decaux, V.; Gullikson, E. M.; Kahn, S. M.; Liedahl, D. A.; Reed, K. J.; Widmann, K.

Recent ASCA spectra exhibit discrepancies with the relative line intensities of various Fe XXIII and XXIV L-shell emission lines predicted by standard plasma emission codes. To address this issue, we have carried out a series of high-resolution, broadband measurements of Fe XXIV line emission using an electron beam ion trap facility. X-ray lines produced in the trap are detected and resolved using Bragg crystal spectrometers. We report measurements of 3 → 2 and 4 → 2 transitions, which result primarily from electron impact excitation. Overall, good agreement is found with distorted wave calculations.


Also Published In

The Astrophysical Journal Letters

More About This Work

Academic Units
Astronomy and Astrophysics
Published Here
March 25, 2013
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