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The spectra of krypton ions produced by the magnetic implosion of a krypton gas cylinder in the wavelength range from 10 to 250 Å have been observed. Lines from highly ionized krypton ions from Kr xxiv to Kr xxvii have been identified by isoelectronic sequence extrapolation and compared with ab initio relativistic calculations. Energy levels are derived for Kr xxvi.
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Stewart et al. (1987) studied this question.
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