First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering

Here we report on the first measurements of 255 MeV electron scattering by an ultrathin 0.58 μm Si(111) crystal at angles of incidence less than the Lindhard critical angle. Computer simulations of trajectories in the ultrathin crystal explain the appearance of specific angular distributions of scat...

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Main Authors: Y. Takabayashi, Yu.L. Pivovarov, T.A. Tukhfatullin
Format: Article
Language:English
Published: Elsevier 2018-10-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269318306804
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author Y. Takabayashi
Yu.L. Pivovarov
T.A. Tukhfatullin
author_facet Y. Takabayashi
Yu.L. Pivovarov
T.A. Tukhfatullin
author_sort Y. Takabayashi
collection DOAJ
description Here we report on the first measurements of 255 MeV electron scattering by an ultrathin 0.58 μm Si(111) crystal at angles of incidence less than the Lindhard critical angle. Computer simulations of trajectories in the ultrathin crystal explain the appearance of specific angular distributions of scattered electrons as a sequence of multiple-value connections between the points of incidence and deflection (scattering) angle. This is similar to the classical rainbow scattering (RS) of waves and particles on a three-dimensional (3D) potential. The principal difference is that scattering by the ultrathin crystal under channeling conditions is dependent on two additional parameters – the crystal thickness (longitudinal size of one-dimensional (1D) potential formed by the periodically arranged crystal planes) and the angle between the beam and crystal planes. The results of simulations agree with the experimental data. The obtained results contribute to an understanding of the physics of relativistic sub-GeV electron scattering by ultrathin crystals and allow it to be recognized as the fourth scattering type among doughnut scattering, scattering at planar alignment, and mirroring, i.e., one-dimensional 1D rainbow scattering (1D-RS).
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spelling doaj.art-12feedc792f54b6c92adc3be2c5f1fae2022-12-21T23:02:34ZengElsevierPhysics Letters B0370-26932018-10-01785347353First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scatteringY. Takabayashi0Yu.L. Pivovarov1T.A. Tukhfatullin2National Research Tomsk Polytechnic University, Tomsk 634050, Russia; SAGA Light Source, 8-7 Yayoigaoka, Tosu, Saga 841-0005, JapanNational Research Tomsk Polytechnic University, Tomsk 634050, RussiaNational Research Tomsk Polytechnic University, Tomsk 634050, Russia; Corresponding author.Here we report on the first measurements of 255 MeV electron scattering by an ultrathin 0.58 μm Si(111) crystal at angles of incidence less than the Lindhard critical angle. Computer simulations of trajectories in the ultrathin crystal explain the appearance of specific angular distributions of scattered electrons as a sequence of multiple-value connections between the points of incidence and deflection (scattering) angle. This is similar to the classical rainbow scattering (RS) of waves and particles on a three-dimensional (3D) potential. The principal difference is that scattering by the ultrathin crystal under channeling conditions is dependent on two additional parameters – the crystal thickness (longitudinal size of one-dimensional (1D) potential formed by the periodically arranged crystal planes) and the angle between the beam and crystal planes. The results of simulations agree with the experimental data. The obtained results contribute to an understanding of the physics of relativistic sub-GeV electron scattering by ultrathin crystals and allow it to be recognized as the fourth scattering type among doughnut scattering, scattering at planar alignment, and mirroring, i.e., one-dimensional 1D rainbow scattering (1D-RS).http://www.sciencedirect.com/science/article/pii/S0370269318306804
spellingShingle Y. Takabayashi
Yu.L. Pivovarov
T.A. Tukhfatullin
First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
Physics Letters B
title First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
title_full First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
title_fullStr First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
title_full_unstemmed First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
title_short First observation of scattering of sub-GeV electrons in ultrathin Si crystal at planar alignment and its relevance to crystal-assisted 1D rainbow scattering
title_sort first observation of scattering of sub gev electrons in ultrathin si crystal at planar alignment and its relevance to crystal assisted 1d rainbow scattering
url http://www.sciencedirect.com/science/article/pii/S0370269318306804
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AT tatukhfatullin firstobservationofscatteringofsubgevelectronsinultrathinsicrystalatplanaralignmentanditsrelevancetocrystalassisted1drainbowscattering