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Positron creation probabilities as well as energy and angular distributionsof outgoing positrons in slow collisions of two identical heavy nuclei areobtained within the two-center approach beyond the monopole approximation. Thetime-dependent Dirac equation for positron wave functions is solved with thehelp of the generalized pseudospectral method in modified prolate spheroidalcoordinates adapted for variable internuclear separation. Depending on thenuclear charge, the results are obtained for both subcritical and supercriticalregimes of the positron creation. The signatures of transition to thesupercritical regime in the total positron creation probabilities and energyspectra are discussed. The angular distributions of emitted positronsdemonstrate a high degree of isotropy.

Angular and energy distributions of positrons created in subcritical and supercritical slow collisions of heavy nuclei