Backward scattering of antiprotons by bare uranium is studied theoreticallyfor antiproton energies within the interval 100 eV -- 1 keV. A marked maximumof the differential cross section in the backward direction (Coulomb glory) atsome energies of the incident particle is revealed. The effect is due to thescreening properties of the vacuum polarization potential and can be regardedas a manifestation of the vacuum polarization in non-relativistic collisions ofheavy particles. Experimental observation can become feasible with newfacilities for antiproton and ion research at GSI.
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