The finite-temperature random-phase approximation for the spectroscopic properties of dense plasmas

The finite-temperature random-phase-approximation (FTRPA) is used to calculate selected spectral properties for 1P excitations of dense neon plasmas. We present FTRPA calculations that include coupled-channel effects. The linear algebraic method is used to solve the resulting set of coupled-channel equations and, as a test of our method, oscillator strengths are calculated at zero-temperature and density and compared with previous calculations. Coupled-channel calculations of the oscillator strength for neon at various temperatures and densities are given; the inclusion of these effects is shown to cause significant differences in the oscillator strength when compared with single-channel and with average-atom calculations. Some trends as a function of temperature and density are also discussed.