Bound-free pair production cross-section in heavy-ion colliders from the equivalent photon approachA. Aste
Department of Physics, University of Basel - Klingelbergstrasse 82, 4056 Basel, Switzerland
received 8 November 2007; accepted in final form 22 January 2008; published March 2008
published online 20 February 2008
Exact calculations of the electron-positron pair production by a single photon in the Coulomb field of a nucleus with simultaneous capture of the electron into the K-shell are discussed for different nuclear charges. Using the equivalent photon method of Weizsäcker and Williams, a simple expression for the bound-free production of e+e- pairs by colliding very-high-energy fully stripped heavy ions is derived for nuclei of arbitrary charge.
12.20.-m - Quantum electrodynamics.
25.75.-q - Relativistic heavy-ion collisions.
29.20.db - Storage rings and colliders.
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