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Free electron-positron pair production in collisions of Au (10.8 GeV/u) with Cu , Ag and Au |
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| Authors: | R. Tenzer N. Grün W. Scheid |
| Affiliation: | Institut für theoretische Physik Justus-Liebig-Universit?t Giessen, Germany, DE |
| Abstract: | Total and differential cross-sections for the production of free electron-positron pairs are calculated for the reactions Au79+ (10.8 GeV/u) on Cu29+, Ag47+ and Au79+. The methods used are the semiclassical approach and the solution of the time-dependent Dirac equation by a coupled channel method with free wavepakets describing the created fermions. The obtained total cross-sections are in good agreement with the experimental data. The differential cross-sections give informations about the correlation between the electron and positron. Received 21 December 1999 and Received in final form 6 March 2000 |
| Keywords: | PACS. 03.65.Pm Relativistic wave equations - 14.60.Cd Electrons (including positrons) - 34.10.+x General theories and models of atomic and molecular collisions and interactions (including statistical theories transition state stochastic and trajectory models etc.) |
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