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Zeitschrift für Physik A Hadrons and nuclei

, Volume 257, Issue 3, pp 183–211 | Cite as

Auto-ionization of positrons in heavy ion collisions

  • Berndt Müller
  • Johann Rafelski
  • Walter Greiner
Article

Abstract

Autoionization of positrons occurs as a fundamentally new process of quantum electrodynamics, if empty 1s- or 2p1/2− etc. electronic shells obtain binding energies larger than 2m e c2. This effect should be experimentally observable in the scattering of very heavy ions (Z≧80) on each other since in such collisions superheavy electronic molecules are formed (superheavy quasi-molecules). The scattering mechanism and the distribution of autoionization positrons are discussed. The adiabaticity of the heavy ion collision is studied and the electron-positron pair production background to the ionization problem is estimated. Analytic solutions are obtained for 1/r-potentials for the caseZα≧1. The phase shifts of negative energy solutions in the case of cutoff Coulomb potentials reveal the accuracy of the autoionization formalism.

Keywords

Pair Production Coulomb Barrier Collision Time Superheavy Element Coulomb Excitation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Berndt Müller
    • 1
    • 2
  • Johann Rafelski
    • 1
    • 2
  • Walter Greiner
    • 1
    • 2
  1. 1.Institut für Theoretische Physik der Universität Frankfurt/MainFederal Republic of Germany
  2. 2.Lawrence Berkeley LaboratoryUniversity of CaliforniaBerkeleyUSA

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