Electron-positron pair production in low-energy heavy-ion collisions

29th International Conference on Photonic, Electronic, and Atomic Collisions

Maltsev, I.A.^1,2 ; Shabaev, V.M.^1 ; Tupitsyn, I.I.^1 ; Bondarev, A.I.^1 ; Kozhedub, Y.S.^1,2 ; Plunien, G.^3 ; Stöhlker, Th^4

Department of Physics, St. Petersburg State University, Ulianovskaya 1, St. Petersburg

198504, Russia^1

SSC RF ITEP of NRC Kurchatov Institute, Bolshaya Cheremushkinskaya 25, Moscow

117218, Russia^2

Institut für Theoretische Physik, TU Dresden, Mommsenstraße 13, Dresden

D-01062, Germany^3

GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstrasse 1, Darmstadt

D-64291, Germany^4

关键词: Dirac equations;    Electron positron pair production;    Heavy ion collision;    Impact-parameter;    Low energy collisions;    Monopole approximation;    Nuclear charges;    Pair production;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/2/022030/pdf
DOI  :  10.1088/1742-6596/635/2/022030

来源: IOP

【 摘 要 】

A method for calculations of pair production in low-energy collisions of heavy ions is developed. The approach is based on the numerical solving of the two-center time-dependent Dirac equation in the monopole approximation. Employing the developed method the positron energy spectra and the numbers of the created pairs are calculated for the symmetric collisions of bare nuclei with different values of the impact parameter and the nuclear charge. In order to investigate the role of the spontaneous pair production the different subcritical and supercritical scenarios are considered.