Critical scattering of Mossbauer radiation in condensed media. II

Zolotojabko, E V; Kashcheev, V. N.

doi:10.1088/0022-3719/12/7/028

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The investigation of condensed media by Rayleigh scattering of Mossbauer radiation is currently developing. The processes near the phase transitions in crystals (Darlington andO'Connor 1976, Zolotojabko andIolin 1979), slow diffusional motions in liquids (Champeney 1979), and biological objects (Gaubman etal 1977, Krupyansky etal 1980, i.e. systems with significant low-frequency excitations, are successfully studied by this technique.…”

Section: Introductionmentioning

confidence: 99%

“…The sample has no Mossbauer nuclei and diffraction takes place at the atomic electrons. The basic distinction from x-ray diffraction consists in a high monochromatisation of Mossbauer radiation because the scattered beam modulated by the excitation frequencies may be analysed by a resonant absorber, Such analysis provides information on the excitation spectrum of the crystal (Iolin and Zolotojabko 1975, Zolotojabko and Kashcheev 1977,1979.…”

Section: Introductionmentioning

confidence: 99%

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Mossbauer diffraction on a single rotating crystal

Zolotojabko¹,

Iolin²,

Muromtsev³

1983

J. Phys. D: Appl. Phys.

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The problem of coherent scattering of Mossbauer radiation in the case of a single rotating crystal is considered. It is shown that the resulting additional Doppler shift leads to the frequency dependence of the purely elastic intensity Iel. Due to the small value of the Mossbauer line width the intensity Iel is sensitive to small deviations of the reciprocal lattice vector from the rotating axis. In order to check the theoretical considerations, the Mossbauer diffraction experiment was carried out on a single pyrolytic graphite crystal. The authors analysed the influence of the mosaic structure of the sample as well as the deflection by the atomic planes from the crystal surface on the obtained results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mossbauer diffraction on a single rotating crystal

Zolotojabko¹,

Iolin²,

Muromtsev³

1983

J. Phys. D: Appl. Phys.

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The Role of Defects on Inelastic Scattering of Mössbauer Radiation near Structural Phase Transitions

Zolotoyabko

Kashcheev

1981

Physica Status Solidi (b)

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An expression for the spectrum of critical inelastic scattering of Mossbauer radiation is derived a t the structural phase transition. It is assumed that the central peak (which determines such characteristics of scattered radiation as the intensity and the width) is due to slow motions of point defects. The temperature dependence of the effective line width is found to arise from vacancy diffusion in BaTiO, to the right of the transition temperature. Qualitative agreement with corresponding experimental data is obtained.

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Critical scattering of Mossbauer radiation in condensed media. II

Cited by 2 publications

References 7 publications

Mossbauer diffraction on a single rotating crystal

Mossbauer diffraction on a single rotating crystal

The Role of Defects on Inelastic Scattering of Mössbauer Radiation near Structural Phase Transitions

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