  Positron creation probabilities as well as energy and angular distributions
of outgoing positrons in slow collisions of two identical heavy nuclei are
obtained within the two-center approach beyond the monopole approximation. The
time-dependent Dirac equation for positron wave functions is solved with the
help of the generalized pseudospectral method in modified prolate spheroidal
coordinates adapted for variable internuclear separation. Depending on the
nuclear charge, the results are obtained for both subcritical and supercritical
regimes of the positron creation. The signatures of transition to the
supercritical regime in the total positron creation probabilities and energy
spectra are discussed. The angular distributions of emitted positrons
demonstrate a high degree of isotropy.
