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Emission spectra of vacancy cascades after K-ionization of the argon atom

- and - emission spectra of the argon atom emitted during the cascading de-excitation of the states appearing after K-shell ionization are calculated. The spectra have complex structures reflecting the dynamics of the de-excitation processes. In the case of the spectrum, the effect of the anomalous increase of fluorescence yields leads both to a substantial increase of emission spectrum intensity and to the change of the relative intensities of spectral lines.