This work is concerned with the description of ion acoustic fluctuations in electron-ion plasmas relevant to laser-plasma interaction experiments. A nonlocal closure to the linearized moment equations for the fluctuating hydrodynamic quantities is introduced. These equations are used to construct practical expressions for the dynamical form factor and Thomson scattering cross section, which are valid in the entire region of particle collisionality in plasmas with high Z and large ZTₑ/Tᵢ.
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Myatt et al. (1998) studied this question.