Recoilless Rayleigh scattering on Rb2ZnCl4 around the normal–incommensurate phase transition point

Enescu, S.E.; Bibicu, I.; Grecu, Maria Nicoleta; Kluger, A.

doi:10.1016/s0038-1098(99)00218-5

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…Our results are consistent with the displacive model [23], which predicts a critical regime of the inelastic scattering of photons around T i [21]. The critical regime of the inelastic scattering is related to the critical soft mode whose contribution to the differential cross-section is important due to its frequency tending to zero.…”

Section: Tablesupporting

confidence: 89%

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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Section: Tablesupporting

confidence: 89%

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

Enescu

Bibicu

2005

Acta Phys. Pol. A

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“…10,11 On the other hand, the temperature dependence of the elastic and inelastic intensities can be used to detect lattice instabilities and structural phase transitions. [12][13][14] The broadening of the resonance lines due to the diffusive atomic motion is another interesting effect allowing the study of those motions occurring at a time scale comparable to the lifetime of the Mössbauer isotope's excited level (10 Ϫ8 s for 57 Fe). 15,16 The relative complexity of the equipment required to perform Raleigh scattering of Mössbauer radiation experi-ments, as opposed to the more common transmission and back scattering forms of Mössbauer spectroscopy, is a barrier to the routine use of this technique.…”

Section: Introductionmentioning

confidence: 99%