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arXiv · 1603.08903

Many-electron effects on the x-ray Rayleigh scattering by highly charged He-like ions

A. V. Volotka·V. A. Yerokhin·A. Surzhykov·Th. Stöhlker·S. Fritzsche
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Abstract

The Rayleigh scattering of x-rays by many-electron highly charged ions is studied theoretically. The many-electron perturbation theory, based on a rigorous quantum electrodynamics approach, is developed and implemented for the case of the elastic scattering of (high-energetic) photons by helium-like ion. Using this elaborate approach, we here investigate the many-electron effects beyond the independent-particle approximation (IPA) as conventionally employed for describing the Rayleigh scattering. The total and angle-differential cross sections are evaluated for the x-ray scattering by helium-like Ni$^{26+}$, Xe$^{52+}$, and Au$^{77+}$ ions in their ground state. The obtained results show that, for high-energetic photons, the effects beyond the IPA do not exceed 2% for the scattering by a closed $K$-shell.

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A. V. Volotka, V. A. Yerokhin, A. Surzhykov, Th. Stöhlker, S. Fritzsche. 2016-03-07. Many-electron effects on the x-ray Rayleigh scattering by highly charged He-like ions. https://doi.org/10.1103/physreva.93.023418

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