Critical scattering of Mossbauer radiation in condensed media

Zolotojabko, E V; Kashcheev, V. N.

doi:10.1088/0022-3719/10/22/029

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…Theoretical discussions of the scattering of Mossbauer radiation near structural phase transitions have been given by Iolin and Zolotoyabko (1975) and Zolotoyabko and Kashcheev (1977). 10-7 S.…”

Section: Cvitical Scattering Soft Modes and Lattice Instabilitiesmentioning

confidence: 99%

The scattering of Mossbauer radiation by condensed matter

Champeney

1979

Rep. Prog. Phys.

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Experimental and theoretical work on the scattering of Mossbauer y radiation by condensed matter is reviewed, covering the period from 1958, and the subject is presented as having features akin to those of x-ray diffraction, inelastic neutron scattering and Mossbauer absorption spectroscopy. An outline of theoretical work on coherence and recoil effects for both electronic and nuclear resonant scattering is given. This is followed by a review of experiments on electronic (Rayleigh) scattering covering thermal diffuse scattering in crystals, Debye-Waller factors, soft modes and critical scattering, diffusion phenomena and amorphous materials, and plastic and liquid crystals, and a review of experiments on nuclear resonant scattering covering coherence interference and diffraction, the crystallographic phase problem, magnetic and quadrupole Mossbauer diffraction, dynamic theory and multiple scattering, cooperative excitation, refractive index, time domain experiments, and experiments based on detection of the conversion electrons.

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Section: Cvitical Scattering Soft Modes and Lattice Instabilitiesmentioning

confidence: 99%

The scattering of Mossbauer radiation by condensed matter

Champeney

1979

Rep. Prog. Phys.

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“…Analysis of the scattered photons by means of the resonance filter [14,15] yields information about the fluctuation dynamics near the phase transition temperature. The behavior of the inelastic intensity in the critical region can be explained by qualitative considerations [16]. At large frequencies of fluctuations, far from the phase transition, a wide line, with width ∼ ω q , formed in the condensed medium during the Mössbauer radiation scattering, is studied with respect to the energy by a narrow resonance filter with the width Γ .…”

Section: Tablementioning

confidence: 99%

Rayleigh Scattering of Mössbauer Radiation Method Used in Dynamics Studies of Condensed Matter

Enescu

Bibicu

2005

Acta Phys. Pol. A

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The Rayleigh scattering of the Mössbauer radiation is a less common technique used in the study of the properties of condensed matter. The detection of the scattered radiation via the nuclear resonance absorption, with an energy resolution of the order of 10 −8 eV makes this technique very sensitive to dynamics changes. The results of our studies by the Rayleigh scattering of the Mössbauer radiation on pyrolytic graphite (C) and rubidium tetrachlorozincate (Rb 2 ZnCl 4 ) are reported. The contribution of the coherent inelastic scattering to the total intensity in C(002) is presented like a consequence of the coupling motions of C atoms in the hexagonal plane. The normal-incommensurate phase transition in Rb2ZnCl4 is discussed in connection with the photon-phonon interaction.

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“…The spectrum of scattered Mossbauer radiation (after transniission through the resonance absorber) has the following form [6] :…”

Section: Defects and Critical Inelastic Scattering Of Mossbauer Radiamentioning

confidence: 99%

“…The quantity qmax is directly connected with the collimation of y-beams. From ( 5 ) , (6) we can find the "width" 6:…”

Section: Defects and Critical Inelastic Scattering Of Mossbauer Radiamentioning

confidence: 99%

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

Cited by 6 publications

References 5 publications

The scattering of Mossbauer radiation by condensed matter

The scattering of Mossbauer radiation by condensed matter

Rayleigh Scattering of Mössbauer Radiation Method Used in Dynamics Studies of Condensed Matter

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

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