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A: Fachverband Atomphysik

A 10: Collisions, scattering and correlation phenomena

A 10.4: Vortrag

Dienstag, 10. März 2020, 15:00–15:15, a320

Polarization transfer in Rayleigh scattering — •Sophia Strnat¹, Vladimir A. Yerokhin², and Andrey Surzhykov^{1, 3} — ¹Technische Universität Braunschweig, Germany — ²Peter the Great St. Petersburg Polytechnic University, Russia — ³Physikalisch Technische Bundesanstalt, Germany

In this work we present a theoretical study of Rayleigh scattering of hard x-rays by closed-shell atoms. In order to investigate this process we employed relativistic Dirac theory and second order perturbation approach. Special attention was paid to the polarization transfer between incident and outgoing light. In particular, we applied density matrix formalism to describe the polarization of the outgoing photons for arbitrary linear and/or circular polarization of the incident photons. We derived the Stokes parameters of the scattered light in terms of their counter-partners for incident light and of the transition amplitudes. Our study generalizes the previous work (reported in Ref [1]) which was restricted to only linear polarization. Detailed calculations were performed for helium-, neon-, argon- and krypton-like lead. Based on these calculations we show that Rayleigh scattering can be used not only to probe the polarization purity of synchrotron radiation but also as an alternative tool for measuring circular polarization in the x-ray domain.
[1] A. Surzhykov et al., Physical Review A 98, 053403 (2018)