Abstract
Using the diagram technique, a high-frequency expansion (with respect to powers 1/ omega 2) is obtained for polarization operators defining dielectric function of a plasma at arbitrary strong interaction between particles. On this basis the spectrum of plasma oscillations for non-ideal classical one- and two-component plasmas is studied. There is a good agreement with the data of molecular dynamic calculations without using any adjusting parameters. It is shown that the non-Coulombic nature of interaction between particles has a dramatic influence on the description of the spectrum of plasma oscillations in the classical two-component plasma.
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