Spin-orbit interaction in bremsstrahlung and its effect on the electron motion in a strong Coulomb field

Kovtun, Oleksiy; Tioukine, V.; Surzhykov, A.; Yerokhin, V. A.; Cederwall, B.; Tashenov, S.

doi:10.1103/physreva.92.062707

Cited by 12 publications

(2 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The combination of both instruments now enables scattering experiments with independent determinations of the linear polarizations of the incident and scattered hard x-rays, therefore providing the most stringent test of the theoretical understanding of the underlying processes. Similar experiments were performed recently, where the polarization transfer from spin-polarized electrons to bremsstrahlung photons was investigated [28,34,60,61]. Moreover, these measurements demonstrated that utilizing theoretical estimates of the polarization transfer characteristics enables an accurate reconstruction of the incident beam polarization.…”

Section: Introductionsupporting

confidence: 67%

Polarization transfer in Rayleigh scattering of hard x-rays

et al. 2016

View full text Add to dashboard Cite

The following errors were introduced in the production process:• In the abstract it says that at θ=90°, a degree of polarization of +0.27%±0.12% was measured. This number should be +27%±12%.• On page 5 there are three occurrences of an amplitude A. All of them should be A P instead. AbstractWe report on the first elastic hard x-ray scattering experiment where the linear polarization characteristics of both the incident and the scattered radiation were observed. Rayleigh scattering was investigated in a relativistic regime by using a high-Z target material, namely gold, and a photon energy of 175keV. Although the incident synchrotron radiation was nearly 100% linearly polarized, at a scattering angle of 90 q =  we observed a strong depolarization for the scattered photons with a degree of linear polarization of 0.27% 0.12% +  only. This finding agrees with second-order quantum electrodynamics calculations of Rayleigh scattering, when taking into account a small polarization impurity of the incident photon beam which was determined to be close to 98%. The latter value was obtained independently from the elastic scattering by analyzing photons that were Compton-scattered in the target. Moreover, our results indicate that when relying on state-of-the-art theory, Rayleigh scattering could provide a very accurate method to diagnose polarization impurities in a broad region of hard x-ray energies.

show abstract

Section: Introductionsupporting

confidence: 67%

Polarization transfer in Rayleigh scattering of hard x-rays

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Advent of third-generation synchrotron radiation facilities made possible scattering experiments of a novel type, where the linear polarizations of both the incident and the scattered particles (photons and/or electrons) were detected [1][2][3][4]. These experiments measured polarization correlations and the polarization transfer between the incident and scattered beams.…”

Section: Introductionmentioning

confidence: 99%

Diagnostics of polarization purity of x rays by means of Rayleigh scattering

et al. 2018

View full text Add to dashboard Cite

The synchrotron radiation is commonly known to be completely linearly polarized when observed in the orbital plane of the synchrotron motion. Under actual experimental conditions, however, the degree of polarization of the synchrotron radiation may be lower than the ideal 100%. We demonstrate that even tiny impurities of polarization of the incident radiation can drastically affect the polarization of the elastically scattered light. We propose to use this effect as a precision tool for the diagnostics of the polarization purity of the synchrotron radiation. Two variants of the diagnostics method are proposed. The first one is based on the polarization measurements of the scattered radiation and relies on theoretical calculations of the transition amplitudes. The second one involves simultaneous measurements of the polarization and the cross sections of the scattered radiation and is independent of theoretical amplitudes.

show abstract