Rayleigh scattering of polarized photons

Somayajulu, D. R. S.; Lakshminarayana, V.

doi:10.1088/0305-4470/1/2/307

Cited by 5 publications

(5 citation statements)

References 12 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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“…Before we present our results for the Stokes parameters, let us briefly discuss some computational details. The evaluation of the polarization of scattered photons requires the knowledge of the reduced second-order tran- sition amplitude (8), which involves the summation over the complite basis of the intermediate states |n ν j ν . In order to perform this summation, we use two independent approaches: the finite basis-set method and the Dirac-Coulomb Green's function (see Ref.…”

Section: G Computationsmentioning

confidence: 99%

“…In the past, a large number of experimental and theoretical studies have been performed in order to understand how the electronic structure of atoms affects the polarization of the Rayleigh-scattered photons [8][9][10][11][12][13][14][15][16]. In particular, the linear polarization of the elastically scattered light has been measured directly by Blumenhagen et al at the PETRA III synchrotron at DESY [17].…”

Section: Introductionmentioning

confidence: 99%

Rayleigh scattering of twisted light by hydrogenlike ions

Peshkov¹,

Volotka²,

Surzhykov³

et al. 2018

Phys. Rev. A

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The elastic Rayleigh scattering of twisted light and, in particular, the polarization (transfer) of the scattered photons have been analyzed within the framework of second-order perturbation theory and Dirac's relativistic equation. Special attention was paid hereby to the scattering on three different atomic targets: single atoms, a mesoscopic (small) target, and a macroscopic (large) target, which are all centered with regard to the beam axis. Detailed calculations of the polarization Stokes parameters were performed for C 5+ ions and for twisted Bessel beams. It is shown that the polarization of scattered photons is sensitive to the size of an atomic target and to the helicity, the opening angle, and the projection of the total angular momentum of the incident Bessel beam. These computations indicate more that the Stokes parameters of the (Rayleigh) scattered twisted light may significantly differ from their behaviour for an incident plane-wave radiation.

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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%

“…The first case of Δfcorresponds to ideal case in which the size of the detector is negligiable. The second case corresponds to the extended detector size defined in the experiment [32].…”

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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Rayleigh scattering of polarized photons

Cited by 5 publications

References 12 publications

Polarization transfer in Rayleigh scattering of hard x-rays

Polarization transfer in Rayleigh scattering of hard x-rays

Rayleigh scattering of twisted light by hydrogenlike ions

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

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