Density-Dependent Lines of One- and Two-Electron Ions in Diagnostics of Laboratory Plasma. II. Intensity Line Ratios of Hydrogenlike, Heliumlike and Oxygenlike Multicharged Ions

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Abstract
Density-dependent spectral lines play an important role in the plasma physics research. Such lines can be used for determination of plasma density from the ratio of spectral line intensities. In the preceding paper [1] we have considered the inelastic collisional transitions between close ion levels which are responsible for excited state distribution when it changes from coronal model at low electron densities up to Boltzman distribution at high electron densities. This variation is the reason of the density dependence of spectral line intensity ratios. In this paper basing on the results obtained in [1] the ratios of several spectral lines of H, He and O-like ions are plotted as a function of electron density. The regions of the plasma parameters for which this ratio may be used as a diagnostics tool are found. The results of this work makes it possible to diagnose plasmas (laser and electron beam plasma, exploding wires, plasma focus etc.) for electron densities 1018 < Ne < 1023cm-3.