Elastic scattering of polarized photons

Brini, D.; Fuschini, E.; Peli, L.; Veronesi, P.

doi:10.1007/bf02745592

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…Vice versa, with an established theory the incident polarization states of the photons can be reconstructed from the measured polarization of the outgoing photons. However, with respect to Rayleigh scattering, experiments involving (linearly) polarized hard x-rays were up to now restricted to scenarios where either the differential cross section for a linearly polarized incident beam [6,7,20,51,52] or the polarization of the scattered beam for an unpolarized incident beam [16,32,50,53,54,70] was measured. Several of those experiments were compared to theoretical predictions in [44].…”

Section: Introductionmentioning

confidence: 99%

Polarization transfer in Rayleigh scattering of hard x-rays

et al. 2016

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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.

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Section: Introductionmentioning

confidence: 99%

Polarization transfer in Rayleigh scattering of hard x-rays

et al. 2016

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“…Many experiments have been performed to study the polarization effects of the elastic scattering of γ-rays [32][33][34]. In these experiments, the partially polarized incoming beam was generated by Compton scattering of unpolarized γ-rays from radioactive sources.…”

Section: Scattering Of Partially Polarized Photonsmentioning

confidence: 99%

Validating polarization effects in γ-rays elastic scattering by Monte Carlo simulation

Omer

Hajima

2019

New J. Phys.

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The polarization properties of γ-rays elastically scattered by atoms have become more observable with the development of polarized photon beams. However, systematic studies are required to explore the elastic scattering in the MeV-energy range of the spectrum where Delbrück scattering becomes more significant, especially at large scattering angles. We implement a new Monte Carlo simulation to account for the polarization effects of elastic scattering. The simulation is based on explicit expressions driven in the formalism of Stokes parameters. The scattering amplitudes of Rayleigh, nuclear Thomson, and Delbrück scattering processes are superimposed onto a two orthogonal set of complex amplitudes. This set is then exploited to construct the core of the simulation in such a way that the simulation can handle arbitrary polarization states of the incoming beam and correspondingly generate polarization states of the outgoing beam. We demonstrate how the polarization of scattered photons is affected by the polarization of incoming photons. In addition, we explain the dependence of depolarization on the azimuthal angle.

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