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An electron beam generated in a plasma focus device was used to produce highly charged metal ions. Soft X-ray emission from the ions was investigated with a flat crystal spectrograph, a time-resolved soft X-ray pinhole camera and a framing interferometer. As a target for the soft X-ray emission, molybdenum was adopted. Molybdenum ions of MoXXXI-MoXXXIV have been successfully generated. Also, it has been demonstrated that the plasma focus is a simple and inexpensive device for generating soft X-ray spectra of highly charged metal ions.
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Hirano et al. (1988) studied this question.
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