Impact of quantum non‐locality and electronic non‐ideality on e–He scattering in a dense plasma

Abstract

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.

Study of the electron–atom collisions in dense semiclassical plasma of noble gases

“…So, when the impact energy is significantly larger than the thermal energy of the system the screening effect can be strongly weakened. In dense semiclassical plasma, in addition to collective effects, the interaction of particles is also affected by the wave properties of these particles, leading to some quantum mechanical effects (see Deutsch (1977), Deutsch, Furutani & Gombert (1981) and Ramazanov, Amirov & Moldabekov (2018)). The study of the properties of dense semiclassical plasma with simultaneous consideration of the effects of screening and diffraction in the interaction of charged particles as well as in the polarization interaction of electron with an atom has been carried out in many works (see, for e.g.…”

Bound states of the hydrogen atom in high‐density plasmas

“…For a wide region of plasma density in Reference [28], an exact expansion of the inverse dielectric function was obtained in the limit of long waves using the local field correction approach. Potentials for electron‐ion, [ 29 ] electron‐atom interactions [ 30 ] were obtained. The screening length in these potentials is interpolated between the Debye and Thomas‐Fermi lengths.…”