369 research outputs found
Electron elastic scattering off a spin-polarized Cr atom
Electron elastic scattering off a spin-polarized Cr(...,
) atom is theoretically studied in the region of electron energies up to
eV using both a one-electron "spin-polarized" Hartree-Fock and
multielectron "spin-polarized" random phase approximation with exchange. It is
found that scattering phase shifts of oppositely spin-polarized incoming
electrons and corresponding cross sections of the scattering reactions
significantly differ from each other, in general, even without accounting for
spin-orbit interaction. This is shown to be associated with the presence of two
semifilled and subshells in the Cr's configuration which
induce considerably different exchange in the interaction of oppositely
spin-polarized incoming electrons with the atom-target. The importance of
electron correlation in elastic scattering process is revealed.
Moreover, correlation is shown to induce strong differences between scattering
of oppositely spin-polarized electrons off Cr. A physically transparent
interpretation for the latter is provided.Comment: 6 pages, 7 figures, submitted to Phys. Rev.
Angle-differential elastic electron scattering off C: A simple semi-empirical theory versus experiment
We prove in the present paper that a simple modeling of a complicated highly
polarizable C target by a rectangular (in a radial coordinate) square
well potential in combination with the static polarization potential provides a
viable approximation for a low-energy elastic electron scattering off this
target. The proof is based on the results of the comparison of the calculated
angle-differential elastic electron scattering cross section off C
versus corresponding experimental data.Comment: 4 pages, 3 figure
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