Evaluation of Acoustoelectric Wave Vectors and Amplitudes from X‐Ray Diffraction Experiments

Köhler, R.; Möhling, W.; Peibst, H.

doi:10.1002/pssb.2220610208

Cited by 21 publications

(12 citation statements)

References 12 publications

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“…The algebraic equations for multiple scattering of X-rays by such a crystal and their solution in a two-wave approximation have been obtained previously in [4]. The corresponding experiment has been reported in [5]. I n Section 2 of the paper we get the system of algebraic equations for multiple scattering of y-quanta by a vibrating crystal.…”

Section: Introductionmentioning

confidence: 94%

Effect of forced vibrations on the scattering of X‐rays and mössbauer radiation by a crystal. II. Dynamical effects

Dzyublik

1986

Physica Status Solidi (b)

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IntroductionIn a previous paper [l] we have developed a general theory of Raman scattering of y-quanta by a crystal, under forced vibrations. The Raman scattering amplitude of y-quanta by nuclei and atomic electrons in such a crystal and the corresponding crosssections were calculated3). These questions were partially discussed also in [ 2 , 31. Here we study the multiple scattering of y-quanta by a crystal, performing forced vibrations. The algebraic equations for multiple scattering of X-rays by such a crystal I n Section 2 of the paper we get the system of algebraic equations for multiple scattering of y-quanta by a vibrating crystal. In Section 3 the two-wave solution of these equations is analysed. In Section 4 the effect of suppression of inelastic scattering and reactions is considered for the case of two-wave inelastic diffraction. In Section 5 l) Prospekt Nauki 119, 252028 Kiev, USSR.

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Section: Introductionmentioning

confidence: 94%

Effect of forced vibrations on the scattering of X‐rays and mössbauer radiation by a crystal. II. Dynamical effects

Dzyublik

1986

Physica Status Solidi (b)

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“…[1][2][3][6][7][8] and [9][10]13], respectively). Their main results could be reduced to the following.…”

Section: Introductionmentioning

confidence: 99%

Neutron Bragg Diffraction on a Bent Silicon Single Crystal Excited by Ultrasound

Raitman¹,

Gavrilov²,

Brezgunov³

et al. 2008

Latvian Journal of Physics and Technical Sciences

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The neutron Bragg diffraction on a bent silicon monocrystal excited by ultrasound was investigated. It is shown that for perfect crystal the relative diffraction intensity is proportional to the acoustic wave amplitude w. The calibration parameters between the generator voltage and acoustic wave amplitude were derived assuming w = (2.3±0.3)⋅10-2 Å/V. To explain the results, a modified Penning-Polder-Kato model was applied. In a bent crystal, owing to ultrasound, transitions between the sheets of a dispersion surface take place. This leads to various manifestations of the behaviour of the integral scattering intensity, which drastically differs from the case of a perfect crystal. The observed effects may be used for creating new types of neutron monochromators and choppers governed by the ultrasound wave amplitude as well as by the length and bending radius of the crystal.

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“…1-3 The choice of Si is due to the availability of large perfect crystals at a low cost, having relatively high radiation resistance. [7][8][9][10] In an important case of Bragg diffraction, surface acoustic waves ͑SAWs͒ are of special interest because they are excited in the thin near-surface crystal layer having a thickness compatible with the x-ray extinction length. Recently diamond crystals have been tested as candidates for the design of high-heat-load transmission ͑Laue͒ crystal monochromators for undulator beamlines.…”

Section: Introductionmentioning

confidence: 99%

Acoustically adjustable LiNbO3 double-crystal monochromator for synchrotron radiation

Polikarpov

Oliveira

Zolotoyabko

1999

Review of Scientific Instruments

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First experiments with the acoustically controlled LiNbO3 double-crystal monochromator for synchrotron radiation have been performed on the diffraction beamline of the Brazilian National Synchrotron Light Laboratory. In order to modify x-ray optical properties of LiNbO3 crystals, 290 MHz surface acoustic waves were generated with the aid of interdigital transducers, fabricated on the polished crystal surfaces by using microelectronics technology. It was shown that by the appropriate choice of diffraction planes, the LiNbO3 double-crystal monochromator can be used for both high-flux and high-resolution applications. Surface acoustic waves allow adjustment of an angular width of diffraction profile to a divergence of the incident synchrotron radiation, optimizing matching conditions for x rays of different wavelengths. Diffraction measurements under surface acoustic wave excitation demonstrated that the parameters of the x-ray beam issuing from the monochromatization system are indeed acoustically controlled, providing a 2–2.5-fold broadening of the diffraction profile and a 1.5-fold gain in the maximum diffraction intensity.

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Evaluation of Acoustoelectric Wave Vectors and Amplitudes from X‐Ray Diffraction Experiments

Cited by 21 publications

References 12 publications

Effect of forced vibrations on the scattering of X‐rays and mössbauer radiation by a crystal. II. Dynamical effects

Effect of forced vibrations on the scattering of X‐rays and mössbauer radiation by a crystal. II. Dynamical effects

Neutron Bragg Diffraction on a Bent Silicon Single Crystal Excited by Ultrasound

Acoustically adjustable LiNbO3 double-crystal monochromator for synchrotron radiation

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