Pair production with inner-shell capture

Abstract

The production of electron-positron pairs with simultaneous capture of the electron into bound states of the target is studied for relativistic heavy-ion collisions in the range of energies 1lab-1. Impact-parameter-dependent probabilities and cross sections are calculated in the semiclassical approximation by using time-dependent perturbation theory in first order and Coulomb-Dirac wavefunctions for the electron and positron states. The authors predict a cross section of about 70 b for the capture of electrons into the target K shell in U⁹²⁺+U⁹²⁺ collisions at E_lab=100 GeV amu^-1.