| NUKLEONIKA 2010, 55(1):3-8
EFFECT OF ELECTRON-ELECTRON CORRELATIONS
ON POSITRON-ELECTRON MOMENTUM DENSITY DISTRIBUTIONS
Edward Boroński
Institute of Physics, Opole University, 48 Oleska Str., 45-052 Opole, Poland
The calculations of the influence of the self-energy effects on the electron-positron (e-p) enhancement factors and the e-p momentum distributions are presented. The approach bases on the novel formulation of the Bethe-Goldstone (B-G) equation for the positron in an electron gas where the scattering of the electrons into the states below the Fermi surface due to the self-energy effects is allowed. This equation has been solved and the corresponding e-p enhancement factors and momentum distributions have been found. The agreement between the absolute values of the theoretical calculations and experimental data has improved noticeably.
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