An. Ipatov et al., EXCHANGE AND POLARIZATION EFFECTS IN ELASTIC ELECTRON-SCATTERING BY METALLIC CLUSTERS, Journal of physics. B, Atomic molecular and optical physics, 31(4), 1998, pp. 925-934
Phaseshifts, partial and total cross sections for elastic electron sca
ttering by small sodium clusters are calculated. The non-local dynamic
interaction of the extra electron with the neutral cluster is describ
ed within the many-body framework of Dyson's equation. Low-energy elec
tron scattering resonances and the energies of bound and quasibound st
ates are shown to be very sensitive to the non-local exchange and dyna
mic polarization interactions.