Mössbauer forward scattering in the regime of RF hyperfine field reversals (FeBO<inf>3</inf>): Temperature dependence of the spectra

© 2017, Allerton Press, Inc. A model of frequency and time-domain Mössbauer forward scattering (FS) spectra on a magnetic target in the regime of RF hyperfine field reversals is proposed. The model allows us to describe the temperature dependence of RF effects in the FS frequency spectra of FeBO 3 measured at temperatures below the Néel point (~348 K). In the proposed model, temporal (with internal mark) Mössbauer FS spectra on a magnetic target are calculated to study the dependence of the structure of these spectra on the target’s optical thickness, the degree of phase correlation of the RF hyperfine field reversals, and the value of the phase of the RF field used as an external parameter

Resonance fluorescence of gamma radiation under conditions of coherent mixing of Mössbauer sublevels

A method is proposed for calculating the resonance fluorescence spectrum of coherent gamma radiation with a finite linewidth under conditions when the sublevels of the ground nuclear state are coupled through a strong field. The spectrum line shape is substantially affected by both the coherent effects induced in the system by a strong field and the finite gamma-radiation width. The results obtained earlier and in this work give impetus to experimental investigations into the coherence of a quantum system and quantum interference of Mössbauer gamma transitions through the excitation of coherent magnetization dynamics or an optical sub-system in solids. © 2003 MAIK "Nauka/Interperiodica"

Quantum interference effects in Mössbauer transitions

Quantum interference effects in Mössbauer transitions in the mode of coherent dynamics of nuclear spins in magnetic materials, which is initiated by an external rf field, were considered. The valve effect in the resonance fluorescence spectra of Mössbauer radiation under these conditions was revealed. A calculation was performed by the density-matrix method developed previously for similar problems in optics and modified taking into account the specific features of the problems of gamma optics. © 2006 by Allerton Press, Inc

Quantum interference in Moessbauer resonance fluorescence

We studied the resonance fluorescence of Moessbauer radiation of Fe 57 nuclei with coherently coupled nuclear sublevels. The obtained results prove that the traditional Moessbauer spectroscopy in scattering geometry is effective enough for experimental investigation of the quantum interference of gamma transitions and for studying the coherencies induced by external radiation fields

Quantum interference in Mössbauer scattering spectra

The role of quantum interference in the formation of the resonance scattering spectra of Mössbauer photons is studied. A resonant rf field mixing the spin levels of the excited state of a nucleus is considered to be the mechanism ensuring the conditions for quantum interference. A considerable intensity redistribution of the elastic and Raman scattering channels is shown to occur as a result of quantum interference. © 2005 Pleiades Publishing, Inc

Intercultural Communication in Confessional Legal Relations (Common and Particular in Russia and Japan)

The study of particularities of regional cross-country images of confession and intercultural communication as well as the semantic image surrounding these concepts is vital in today’s social life. The article analyzes denotations and connotations of the terms confession and intercultural communication in the Russian and Japanese sociocultural contexts from the point of view of a new research discourse — glocal religious studies with the focus on vernacular specifics of religiosity in Russia and Japan. The case study methodology includes description and analysis of how various views on certain aspects of religiosity correlate. It makes possible to adjust the theoretical understanding of the problem and weigh it against the variety of real-life communicational practices. The article investigates the complexity and dramatism of communication between members of the ingroup and others. The study bases on the materials from the history, media and academic discourses where in the internal and external of particular communities in the given historic circumstances may not only vary significantly, but also be intentionally marked to divide one from the other. Sometimes this demarcation takes a form of stigmatization that label one’s perspective as not-true or lawless. The paper describes two major types of culture: the first one (ethnocentrism in terms suggested by M. Bennet) derives from the idea that other’s statements are sealed and cannot be translated thus must be destroyed. The second type — ethnorelativism — comes from the idea of affinity and openness. It is presumed that taking one a different perspective and accepting diversity is empowering and gives start to an intercultural dialogue. Common and particular are the two basic viewpoints on any identity, when both positive and negative promotes understanding. The phenomenon of unity as similarity of indistinguishable (like grains of sand) on the one hand, and systemic unity of the different (like people) on the other hand, are considered within the framework of distancing extralinguistic social facts from the term that stand for them. The latter shown as special imaginary unities and descriptions of autopoietic systems

Mössbauer forward scattering on FeBO3 in the RF remagnetization regime

The RF Mössbauer spectra have been measured on iron borate (FeBO3) in the forward scattering scheme. A model based on the mechanism of the RF reversal of the hyperfine field reproduces all features of the observed spectra, including the appearance of satellites at the double frequency. © 2010 Pleiades Publishing, Ltd

Controllable quantum interference in Mössbauer spectroscopy: "valve" effect

A possibility of redistribution of line intensities in the spectrum of resonant Mössbauer scattering due to the RF-stimulated quantum interference of the spectroscopic amplitudes is shown. The three-level Σ scheme in the second order of the perturbation theory with respect to the interaction of γ radiation with nucleus is considered exactly taking into account the resonant RF field. The calculations suggest the use of the 57Fe isotope in magnetic materials in experiments. © Allerton Press, Inc. 2007

Radiofrequency stimulated quantum interference on Mössbauer transitions

Redistribution of the elastic and Raman channel intensities in the Mössbauer resonant scattering spectrum can be controlled by the radio frequency (rf) stimulated quantum interference of gamma-transition amplitudes. More general expressions for each channel intensity are written out exactly taking into account the influence of the rf field. Results of calculations for the simple three-level scheme can be easily generalized to the case of 57Fe isotope in magnetic materials. © Nauka/Interperiodica 2007

Transparency of a thin absorber in Moessbauer optics: Effect of electron relaxation

A model of Moessbauer absorption taking into account the effects of the electron relaxation and the nuclear levels anticrossing simultaneously has been proposed. The dependence of the absorption deficit (transparency) on the relaxation and mixing parameters has been obtained using the stochastic theory of Moessbauer relaxation spectra. The role of quantum interference in occurrence of a partial transparency on Moessbauer transitions has been explored under these conditions. © 2010 IOP Publishing Ltd