Impact of quantum non-locality and electronic non-ideality on e-he scattering in a dense plasma

The screened Hartree-Fock potential and the polarization potential for the description of the electron-helium scattering in dense plasmas are derived. The effects of quantum non-locality and correlations of free electrons are taken into account in the plasma dielectric function. Plasma polarization leads to a significant increase in the transport cross-section at small wave numbers ka < 2 in comparison with the case of an electron scattering on the isolated atom, where a is the mean distance between plasma electrons. It is shown that taking into account the quantum non-locality and correlations is important at ka < 2. (copyright 2018 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)