Many-electron effects on x-ray Rayleigh scattering by highly charged He-like ions
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 heliumlike ions. 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 heliumlike Ni26 +,Xe52 +, and Au77 + 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.
- Publication:
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Physical Review A
- Pub Date:
- February 2016
- DOI:
- 10.1103/PhysRevA.93.023418
- arXiv:
- arXiv:1603.08903
- Bibcode:
- 2016PhRvA..93b3418V
- Keywords:
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- Physics - Atomic Physics
- E-Print:
- 15 pages, 11 figures