On the basis of the Coulomb cut-off potential model [Z, 31 electrical conductivity calculations for a H-Plasma are carried out in a temperature and density range 8000 K 5 T 5 50000 K and 1018 om-3 5 n, 5 1024The electron-ion scattering is included by the semiclassical result given in [2, 31, whereas the influence of the electron-electron scattering is included by the well known Spitzer-factor. The electron-neutral interaction is modelled by a polarization potential [8] in Born-approximation. The results for the electron-ion interaction show a dependence only on the parameter rc = e2kBT/rc, whereas the electron-neutral interaction has a more complicated temperature dependence.

High frequency electrical conductivity is studied in the case of a strongly coupled quasiclassical plasma. Analytic results are derived both from the memory function formalism and the linear response theory developed earlier. The results obtained are compared with computer simulation data. Collective effects are shown to play an important rqle in optical properties of collision dominated plasmas.

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Elastic scattering of electrons by cut-off Coulomb potential U,(r) is investigated, whereU,(r) = 0, for r > r, and U,(r) = -l/r + l/rc for r S r,. This is first considered in terms of classical, and later quantum mechanical (partial wave) methods in the low energy range 0 5 E 5 l/rc, where E is the energy of the free electron. Scattering in this energy region displays a number of particular characteristics, such as back scattering, at certain energies. It can be concluded that some agreement does exist between the classical and quantum mechanical results.

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