Abstract
The possibility of using the relative intensities of the 1snp 1P1–1s 2 1S0 transitions with n = 3–6 in He-like multicharged ions to diagnose plasma in a nonstationary ionization state is considered. The calculations performed for F VIII ions show that, at electron temperatures of T e = 10–100 eV, the intensity ratios are sensitive to the plasma electron density in the range of N e = 1016–1020 cm–3. The universal calculated dependences can be used to diagnose various kinds of recombining or ionizing plasmas containing such ions.
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