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Generation of Short Hard-X-Ray Pulses of Tailored Duration Using a Mössbauer Source

Wang, G., Liao, W.

Published Jul 6, 2018• 10 citations
OpenAlex

Abstract

We theoretically investigate a scheme for the generation of single hard-x-ray pulses of controllable duration in the range of 1–100 ns from a radioactive Mössbauer source. The scheme uses a magnetically perturbed 57FeBO3 crystal illuminated with recoilless 14.4-keV photons from a 57Co radioisotope nuclide. Such a compact x-ray source is useful for the extension of quantum optics to the 10-keV energy scale, which has been in the spotlight in recent years. So far, experimental achievements have mostly been attained in synchrotron radiation facilities. However, the use of tabletop and portable hard-x-ray sources for time-resolved measurements and for implementing coherent control over nuclear quantum-optics systems has still been limited. The availability of compact hard-x-ray sources may become the engine for the application of quantum-information schemes down to the subatomic scale. We demonstrate that the present method is versatile and provides an economic solution, utilizing a Mössbauer source, to perform time-resolved nuclear scattering, to produce suitable pulses for photon storage, and to flexibly generate x-ray single-photon entanglement.

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A technique to transform the waveform of a 14.4 keV photon (time dependence of the photon detection probability or, equivalently, the intensity of the single-photon wave packet) into a regular sequence of short, nearly bandwidth-limited pulses with a controlled number of pulses is proposed. It is based on coherent forward scattering of single X-ray photons from a synchrotron Mössbauer source (SMS) in an optically thick, vibrating, recoilless 57Fe resonant absorber. The possibility of compressing the waveform of an SMS photon into a single short bell-shaped pulse is predicted. The experiment is proposed for compressing a 100 ns duration 14.4 keV single-photon wave packet produced by SMS at the European Synchrotron Radiation Facility (ESRF) into a single bell-shaped pulse of less than 20 ns duration and more than twice the peak intensity. Such single-photon coherent pulses are promising for applications in the fast-developing field of X-ray quantum optics, including possible implementation of quantum memory.

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Compression of γ -ray photons into ultrashort pulses

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We propose a technique of ultra-short $\ensuremath{\gamma}$-ray pulses production with a pulse duration much less than the natural lifetime of a nucleus excited state. The technique is based on compression of frequency modulated radiation of a Mossbauer source while propagating in a far-detuned resonant absorber. Numerical estimates for ${}^{57}\mathrm{Fe}$ 14.413 keV nuclear resonance energy show feasibility of experimental realization of the technique

Physical Review A•Oct 27, 2003•7 citations
We theoretically investigate a scheme for the generation of single hard-x-ray pulses of controllable duration in the range of 1–100 ns from a radioactive Mössbauer source. The scheme uses a magnetically perturbed 57FeBO3 crystal illuminated with recoilless 14.4-keV photons from a 57Co radioisotope nuclide. Such a compact x-ray source is useful for the extension of quantum optics to the 10-keV energy scale, which has been in the spotlight in recent years. So far, experimental achievements have mostly been attained in synchrotron radiation facilities. However, the use of tabletop and portable hard-x-ray sources for time-resolved measurements and for implementing coherent control over nuclear quantum-optics systems has still been limited. The availability of compact hard-x-ray sources may become the engine for the application of quantum-information schemes down to the subatomic scale. We demonstrate that the present method is versatile and provides an economic solution, utilizing a Mössbauer source, to perform time-resolved nuclear scattering, to produce suitable pulses for photon storage, and to flexibly generate x-ray single-photon entanglement.
A technique to transform the waveform of a 14.4 keV photon (time dependence of the photon detection probability or, equivalently, the intensity of the single-photon wave packet) into a regular sequence of short, nearly bandwidth-limited pulses with a controlled number of pulses is proposed. It is based on coherent forward scattering of single X-ray photons from a synchrotron Mössbauer source (SMS) in an optically thick, vibrating, recoilless 57Fe resonant absorber. The possibility of compressing the waveform of an SMS photon into a single short bell-shaped pulse is predicted. The experiment is proposed for compressing a 100 ns duration 14.4 keV single-photon wave packet produced by SMS at the European Synchrotron Radiation Facility (ESRF) into a single bell-shaped pulse of less than 20 ns duration and more than twice the peak intensity. Such single-photon coherent pulses are promising for applications in the fast-developing field of X-ray quantum optics, including possible implementation of quantum memory.
Abstract Recently, an observation of acoustically induced transparency (AIT) of a stainless-steel foil for resonant 14.4-keV photons from a radioactive 57Co Mössbauer source due to collective uniform oscillations of atomic nuclei was reported [Phys Rev Lett 124,163602, 2020]. In this paper, we propose to use the steep resonant dispersion of the absorber within the AIT spectral window to dramatically reduce a propagation velocity of γ-ray and x-ray photons. In particular, we show that a significant fraction (more than 40%) of a 97-ns γ-ray single-photon wave packet from a 57Co radioactive source can be slowed down up to 3 m/s and delayed by 144 ns in a 57Fe-enriched stainless-steel foil at room temperature. We also show that a similarly significant slowing down up to 24 m/s and a delay by 42 ns can be achieved for more than 70% of the 100-ns 14.4-keV x-ray single-photon pulse from a synchrotron Mössbauer source available at European Synchrotron Radiation Facility (ESRF) and Spring-8 facility. The propagation velocity can be widely controlled by changing the absorber vibration frequency. Achieving the propagation velocity on the order of 1–50 m/s would set a record in the hard x-ray range, comparable to what was obtained in the optical range.
We propose a technique that makes it possible to transform the intensity of a quasi-monochromatic single-photon wave packet, emitted by a radioactive Mössbauer gamma-ray source, into a sequence of short bursts with an arbitrary number of bursts, including a single burst. In addition, the technique allows one to individually and independently control, on demand, the moments of the burst appearance, as well as the peak intensity, duration and shape of each burst in the sequence. The technique is based on the transmission of Mössbauer (recoilless) photons through a resonantly absorbing medium, which is rapidly displaced at some moments of time relative to the source (or vice versa) along the photon propagation direction at a distance less than the photon wavelength, and returned to its original position. The burst durations can be comparable to the duration of the single-photon pulses produced by synchrotrons but have the controlled spectral-temporal characteristics. We show that the proposed technique can be implemented on the basis of currently available equipment with use of 14.4-keV recoilless photons, emitted by Co-57 source, and Fe-57 absorber, which opens up prospects for its applications in Mössbauer spectroscopy and x-ray quantum optics.
We propose a technique that makes it possible to transform the intensity of a quasimonochromatic single-photon wave packet, emitted by a radioactive M\"ossbauer \ensuremath{\gamma}-ray source, into a sequence of short bursts with an arbitrary number of bursts, including a single burst. In addition, the technique allows one to individually and independently control, on demand, the moments of the burst appearance, as well as the peak intensity, duration, and shape of each burst in the sequence. The technique is based on the transmission of M\"ossbauer (recoilless) photons through a resonantly absorbing medium, which is rapidly displaced at some moments of time relative to the source (or vice versa) along the photon propagation direction at a distance less than the photon wavelength, and returned to its original position. The burst duration can be comparable to the duration of the single-photon pulses that are produced by synchrotrons but have the controlled spectral-temporal characteristics. We show that the proposed technique can be implemented on the basis of currently available equipment with the use of 14.4-keV recoilless photons, emitted by a 57Co^{57}\mathrm{Co}57Co source and a 57Fe^{57}\mathrm{Fe}57Fe absorber, which opens up prospects for its applications in M\"ossbauer spectroscopy and x-ray quantum optics.
We propose a technique for transforming the intensity of quasi-monochromatic recoilless radiation with a photon energy of 93.3 keV, emitted by radioactive Mössbauer sources 67Ga or 67Cu, into a sequence of short pulses with individually and independently controlled, on demand, the moments of appearance of pulses, as well as the peak intensity, duration and shape of each pulse. The technique is based on the transmission of recoilless (Mössbauer) 93.3-keV photons from the source through a medium containing resonantly absorbing 67Zn nuclei. The pulses are formed due to the rapid reciprocating movement of the source relative to the absorber at specified moments in time along the direction of photon propagation at a distance not exceeding half the radiation wavelength. The produced sequences of γ\gamma γ -ray pulses are similar to the digitization of information carried by electromagnetic waves. They can also be used to develop Mösbauer spectroscopy of the atomic and subatomic structures, as well as open novel opportunities for γ\gamma γ -ray quantum optics.
We propose a technique of ultra-short $\ensuremath{\gamma}$-ray pulses production with a pulse duration much less than the natural lifetime of a nucleus excited state. The technique is based on compression of frequency modulated radiation of a Mossbauer source while propagating in a far-detuned resonant absorber. Numerical estimates for 57Fe{}^{57}\mathrm{Fe}57Fe 14.413 keV nuclear resonance energy show feasibility of experimental realization of the technique