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arXiv:2411.05530 · Journal of Experimental and Theoretical Physics Letters

Digitization of 93.3-keV Recoilless γ-radiation

Yevgeny V. Radeonychev, I. R. Khairulin

Published Dec 28, 2024• 0 citations
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Abstract

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 $$\gamma $$ -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 $$\gamma $$ -ray quantum optics.

DOI
10.1134/s0021364024604676

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Physical Review A•Oct 31, 2018•14 citations
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 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 study propagation of $\ensuremath{\gamma}$ radiation from a M\"ossbauer radioactive source through a vibrating recoilless resonant absorber and find the optimal conditions to produce a periodic train of $\ensuremath{\gamma}$-ray pulses with maximum peak intensity, several times higher than the intensity from the source, and minimum duration, much shorter than the lifetime of the emitting nuclear state of the source. The shape, duration, and repetition rate of the pulses are tunable in a wide range. We propose modifications of the recently reported experiment [F. Vagizov et al., Nature (London) 508, 80 (2014)] to produce pulses with higher peak intensity and shorter duration using absorbers enriched by the resonant nuclei and discuss possible applications of the generated pulses for the time-domain M\"ossbauer spectroscopy.
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.
Recently, an exponentially decaying waveform (the time dependence of detection probability) of a M\"ossbauer \ensuremath{\gamma}-ray photon was transformed into a regular sequence of short pulses in a sinusoidally vibrating recoilless resonant absorber [F. Vagizov, V. Antonov, Y. V. Radeonychev, R. N. Shakhmuratov, and O. Kocharovskaya, Coherent control of the waveforms of recoilless \ensuremath{\gamma}-photons, Nature (London) 508, 80 (2014)]. In the present paper, we show that the peak amplitude of the pulses can be considerably increased via joint adjustment of optical depth of the absorber and the initial phase of its vibration. This is due to reduction of the photoelectric absorption and maximizing the constructive temporal interference of spectral content of the single-photon wave packet in an optically deep absorber. The ultimate capabilities for transforming a waveform of a 14.4-keV photon from a 57Co^{57}\mathrm{Co}57Co radioactive source into a regular train of pulses in a harmonically vibrating 57Fe^{57}\mathrm{Fe}57Fe recoilless resonant absorber are discussed. We show that the shortest pulse duration, produced by this technique, is limited by the highest available vibration frequency of a piezoelectric transducer and at present can be as short as 7.7 ps. The maximum achievable detection probability of the transformed photon at the experimentally feasible conditions is more than two times higher than peak detection probability of the photon emitted by the source and nearly 5.5 times higher than obtained in the above reference.