Abstract
Measurements of the fine structure on the high-energy side of the Fe Kβ x-ray line, obtained from low-inductance high-current vacuum sparks, are reported. Fully relativistic central field calculations for atoms, including magnetic Breit interactions and estimates of the Lamb shifts, correlate the experimental features to the 1s-3p transition of the various Fe ions. The features are shown to be emitted by ions from Fe ix to Fe xviii, and Fe xxiv to Fe xxvi.
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