Abstract
In the context of the electron-ion interaction potential, a rigorous description is given of the permittivity ɛ(ω) of a fully ionized plasma in the frequency range ω ≫ \( \tilde v_{ei} \), where \( \tilde v_{ei} \) is the characteristic electron-ion collision frequency. The interaction and degeneration effects in the electron and ion subsystems are systematically taken into account. The asymptotics of the effective collision frequency ν(ω) and the renormalization function γ(ω) for the plasma frequency are found, and the rules of sums for the permittivity ɛ(ω) are determined.
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