Angular and energy distributions of positrons created in subcritical and supercritical slow collisions of heavy nuclei
arXiv:2312.05069 · doi:10.1103/PhysRevD.109.036008
Abstract
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.
References in corpus (6)
- Advances in QED with intense background fields
- Calculation of electron-positron production in supercritical uranium-uranium collisions near the Coulomb barrier
- Supercritical Dirac resonance parameters from extrapolated analytic continuation methods
- Electron-positron pair creation in low-energy collisions of heavy bare nuclei
- Relativistic calculations of the ground state energies and the critical distances for one-electron homonuclear quasi-molecules
- Spontaneous vacuum decay in low-energy collisions of heavy nuclei beyond the monopole approximation