X-ray satellite lines from hot dense plasma, such as laser-produced plasma, are important for plasma diagnostics. In order to estimate plasma parameters in hot dense plasma, for example electron temperature, the line intensity ratios of the resonance line to the satellite lines have been used. In the case of H-like ions, electron temperature is derived from a ratio of a intensity of a satellite line to that of the resonance line, i.e. 2p^{2 1}D₂–1s2p ¹P₁ and 2p ²P–1s ²S. On the other hand, electron density is estimated from a ratio of the intensities of satellite lines, i.e. 2p^{2 1}D₂–1s2p ¹P₁ and 2p^{2 3}P₂–1s2p ³P₂.
In this report, we study the plasma diagnostics using the intensity ratios of two satellite lines to analyze the observed spectra from laser-produced plasma with high-resolution spectrometer[1,2]. We constructed a collisional-radiative model including doubly excited states. Using our CRM we studied the electron temperature and density dependence for the intensity ratios of satellite lines and applied the results to diagnose the temperature and density. We did not use the intensity of the resonance line for our analysis, because the opacity might affect on Lyα lines. As for atomic data for satellite lines from autoionizing states, autoionization rates and spontaneously radiative transition rates, the data by MZ code [3, 4] are used. Electron temperature and density were derived to be 200eV and 5 × 10²⁰cm^-3, respectively with atomic data by MZ. Recently, the atomic data based on relativistic many-body theory are calculated [5, 6]. We compared theoretical line spectra with atomic data by MZ and by many-body theory. We will also discuss the effect of opacity on Lyα lines and satellite lines. The effect of opacity is taken into account in line intensities and profiles by solving radiation transfer.

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