Abstract
The production of electron-positron pairs by electromagnetic fields in relativistic heavy ion collisions is studied nonperturbatively within a coupled-channel formalism. For the description of the electron field an expansion in atomic wave functions around the target nucleus is employed. The positive and negative continua are discretized by means of time-dependent relativistic wave packets. For the system U92+ +U92+ atE lab=10 GeV/nucleon andb=386 fm and with a limited set of angular momenta we calculate probabilities for free pair production and production with inner-shell capture, which are by about two orders of magnitude larger than those obtained in first order perturbation theory. This indicates a drastic failure of the perturbation theory of first order for high-Z heavy ion collisions.
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Dedicated to Professor Wilhelm Hanle on the occasion of his 90th birthday
Work supported by BMFT (06 GI 709) and GSI (Darmstadt)
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Momberger, K., Grün, N. & Scheid, W. Coupled channel analysis of electron-positron pair production in relativistic heavy ion collisions. Z Phys D - Atoms, Molecules and Clusters 18, 133–137 (1991). https://doi.org/10.1007/BF01437438
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DOI: https://doi.org/10.1007/BF01437438