Mössbauer spectroscopy under acoustical excitation: thick target effects

Sadykov, E. K.; Yurichuk, A. A.; Vagizov, F. G.; Valiullin, A. A.

doi:10.1007/s10751-017-1457-z

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…Another well-known manifestation of the Doppler effect is the periodic modulation of the quantum transition frequencies of nuclei in the case of acoustic vibration of the absorber. If the vibration frequency exceeds the transition linewidth, such a modulation leads to splitting of a recoilless absorption single line into a comb of equidistant well-resolved spectral components separated by the vibration frequency (see 19 – 24 and references therein). The basic consequence of this multi-frequency nuclear response is the appearance of sidebands in the spectrum of the transmitted field, accompanied by a decrease in the absorption of radiation at the nuclear resonance and an increase in the integral transmittance of the absorber 19 , 25 – 28 .…”

Section: Introductionmentioning

confidence: 99%

Acoustically induced transparency for synchrotron hard x-ray photons

Khairulin

Radeonychev

Antonov

et al. 2021

Sci Rep

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The induced transparency of opaque medium for resonant electromagnetic radiation is a powerful tool for manipulating the field-matter interaction. Various techniques to make different physical systems transparent for radiation from microwaves to x-rays were implemented. Most of them are based on the modification of the quantum-optical properties of the medium under the action of an external coherent electromagnetic field. Recently, an observation of acoustically induced transparency (AIT) of the 57Fe absorber for resonant 14.4-keV photons from the radioactive 57Co source was reported. About 150-fold suppression of the resonant absorption of photons due to collective acoustic oscillations of the nuclei was demonstrated. In this paper, we extend the AIT phenomenon to a novel phase-locked regime, when the transmitted photons are synchronized with the absorber vibration. We show that the advantages of synchrotron Mössbauer sources such as the deterministic periodic emission of radiation and controlled spectral-temporal characteristics of the emitted photons along with high-intensity photon flux in a tightly focused beam, make it possible to efficiently implement this regime, paving the way for the development of the acoustically controlled interface between hard x-ray photons and nuclear ensembles.

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Section: Introductionmentioning

confidence: 99%

Acoustically induced transparency for synchrotron hard x-ray photons

Khairulin

Radeonychev

Antonov

et al. 2021

Sci Rep

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“…The 4.5-fold suppression of 14.4-keV collective coherent emission from two 57 Fe layers imbedded into a specifically designed planar waveguide was reported in [11]. It was observed that acoustic vibration of nuclear absorber leads to appearance of sidebands in the Mossbauer absorption spectra corresponding to a decrease in its resonant opacity [24,25]. In the case of piston-like absorber vibration (synchronous nuclear oscillations), the efficient resonant transformation of the incident quasi-monochromatic radiation into sidebands greatly enhanced its transmittance to 70% demonstrated in [12] and over 80% observed in [20].…”

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confidence: 95%

“…However, the common tools for controlling quantum optical interfaces, such as intense spectrally narrow coherent sources and highfinesse cavities are still unavailable in hard x-ray/-ray range, preventing from a direct realization of the basic optical transparency techniques such as EIT and ATS-transparency, for high-energy photons. Several different techniques to control resonant interaction between hard x-ray/-ray photons and nuclear ensembles were developed, based on variation of hyperfine or external magnetic field [10,17,18], mechanical displacement (periodic or non-periodic) of an absorber or source with respect to each other including acoustic vibration [12,16,[19][20][21][22][23][24][25][26][27], and placing nuclei into a spatial sandwich-like nano-structure [11]. The 25% reduction in absorption of 14.4-keV photons was observed via anti-crossing of the upper energy sublevels of 57 Fe nuclei in a crystal of FeCO 3 taking place at 30 K [10].…”

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confidence: 99%

Observation of Acoustically Induced Transparency for γ -Ray Photons

et al. 2020

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We report an observation of a 148-fold suppression of resonant absorption of keV photons from exp (-5.2) to exp(-0.2) with preservation of their spectral and temporal characteristics in an ensemble of the resonant two-level 57 Fe nuclei at room temperature. The transparency was induced via collective acoustic oscillations of nuclei. The proposed technique allows extending the concept of induced optical transparency to a hard x-ray/-ray range and paves the way for acoustically controllable interface between x-ray/-ray photons and nuclear ensembles, advancing the field of x-ray/-ray quantum optics.The induced transparency of opaque medium for resonant electromagnetic radiation is a powerful tool for manipulating the field-matter interaction. The study of phenomena associated with transparency induced in natural and artificial quantum and classical systems for resonant electromagnetic radiation in a wide spectral range from microwaves to γ-rays, as well as their applications, is an extremely broad area of research [1][2][3][4][5][6][7][8][9][10][11][12], extended also to acoustic waves [13,14]. Self-induced transparency [1], transparency via Autler-Townes splitting (ATS) [2,3], and electromagnetically induced transparency (EIT) [4,5] including their analogs in various quantum and classical systems [6][7][8][9][10][11], are just several examples of numerous techniques for suppression of resonant absorption. Important applications of induced optical transparency such as high refractive index and nonlinearities at the few-photon level, slow and stored light, optical quantum information processing, etc. stimulate a development of similar techniques in the hard x-ray/γ-ray domain. Highenergy 10˗100-keV photons can be easier detected and tighter focused than optical photons [15], while corresponding resonant recoilless nuclear transitions have orders of magnitude narrower linewidths at room temperature than optical atomic transitions at a comparable solid density [12,16]. These features are promising for realization of very compact and efficient interfaces between single hard x-ray/-ray photons and nuclear ensembles. However, the common tools for controlling quantum optical interfaces, such as intense spectrally narrow coherent sources and highfinesse cavities are still unavailable in hard x-ray/-ray range, preventing from a direct realization of the basic optical transparency techniques such as EIT and ATS-transparency, for high-energy photons. Several different techniques to control resonant interaction between hard x-ray/-ray photons and nuclear ensembles were developed, based on variation of hyperfine or external magnetic field [10,17,18], mechanical displacement (periodic or non-periodic) of an absorber or source with respect to each other including acoustic vibration [12,16,[19][20][21][22][23][24][25][26][27], and placing nuclei into a spatial sandwich-like nano-structure [11]. The 25% reduction in absorption of 14.4-keV photons was observed via anti-crossing of the upper energy sublevels of 57 Fe nuclei...

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