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Low-inductance vacuum spark discharges display the occurence of hot tiny micropinches, which consist of anode material and which are intense emitters of X-ray radiation. This report presents absolute measurements of the brightness and energy emitted in the wavelength interval 7-14 AA and in the water window 24-27 AA. Elements were Mg, Al, Ti and Cu. The energy in the resonance line of He-like Mg can reach 100 mJ.
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Hebach et al. (1993) studied this question.
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