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A: Fachverband Atomphysik
A 1: Highly charged ions and their applications
A 1.3: Vortrag
Montag, 9. März 2020, 11:45–12:00, a320
Polarization effects in bound-free pair production — •Jonas Sommerfeldt1,2, Robert Müller1,2, Anton Artemyev3, and Andrey Surzhykov1,2 — 1Technische Universität Braunschweig, Germany — 2Physikalisch-Technische Bundesanstalt, Germany — 3Universität Kassel, Germany
The study of electron-positron pair production in ion-ion and ion-photon collisions has a long history in accelerator physics. The bound-free e−e+ process is of special interest since it leads to the loss of ions from the beam. During the last decades, a large number of works has been performed to investigate the total and differential cross section of this process. In contrast, its polarization properties are way less known.
In this contribution, we present a theoretical study of bound-free e−e+ pair production in the interaction of γ rays with bare ions. A particular emphasis is placed on the longitudinal polarization of the produced positrons and final hydrogen-like ions. To evaluate this polarization we employed exact solutions of the relativistic Dirac equation and used first-order perturbation theory to treat the electron-photon coupling. Our results suggest that bound-free pair production can be a source of strongly polarized positrons and ions [1].
[1] J. Sommerfeldt et al., Physical Review A 100, 042511 (2019)