The nature of the narrow peaks in the $e^{+}{e}^{-}$ pair production in heavy ion collisions

Abstract

Experiments on heavy ion collisions performed at GSI (Darmstadt, Germany) revealed series of narrow quasi-equidistant peaks in the energy distribution of the produced $e^{+}{e}^{-}$ pairs in the range from 1.5 to 2.0 MeV which are ascribed to the pair coupling with a strong magnetic field generated by fast nuclei with $Z\sim 90$. The pair is captured in the magnetic trap with dimensions of $10^{-10}$ cm and average field $\sim 5\cdot 10^{12}$ Gs and, in turn, confines this magnetic field in the trap during $\sim 10^{-19}$ s due to the Alfven effect of magnetic field "freezing-in" into the conducting medium.

Comments: 8 pages, 1 figure