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  Phase-sensitive nuclear target spectroscopy

Herkommer, B., & Evers, J. (2020). Phase-sensitive nuclear target spectroscopy. Physical Review Research, 2(2): 023397. doi:10.1103/PhysRevResearch.2.023397.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-C353-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-C354-F
Genre: Journal Article

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2003.09846.pdf (Preprint), 3MB
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 Creators:
Herkommer, Benedikt1, Author              
Evers, Jörg1, Author              
Affiliations:
1Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society, ou_904546              

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Free keywords: Quantum Physics, quant-ph
 MPINP: Research group J. Evers – Division C. H. Keitel
 Abstract: Mössbauer nuclei feature exceptionally narrow resonances at hard x-ray energies, which render them ideal probes for structure and dynamics in condensed-matter systems, and a promising platform for x-ray quantum optics and fundamental tests. However, a direct spectroscopy at modern x-ray sources such as synchrotrons or x-ray free electron lasers is challenging, because of the broad spectral bandwidth of the delivered x-ray pulses, and because of a limited spectral resolution offered by x-ray optics and detectors. To overcome these challenges, here, we propose a spectroscopy technique based on a spectrally narrow reference absorber that is rapidly oscillating along the propagation direction of the x-ray light. The motion induces sidebands to the response of the absorber, which we scan across the spectrum of the unknown target to gain spectral information. The oscillation further introduces a dependence of the detected light on the motional phase at the time of x-ray excitation as an additional controllable degree of freedom. We show how a Fourier analysis with respect to this phase enables one to selectively extract parts of the recorded intensity after the actual experiment, throughout the data analysis. This allows one to improve the spectral recovery by removing unwanted signal contributions. Our method is capable of gaining spectral information from the entire measured intensity, and not only from the intensity at late times after the excitation, such that a significantly higher part of the signal photons can be used. Furthermore, it not only enables one to measure the amplitude of the spectral response, but also its phase.

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 Dates: 2020-06-24
 Publication Status: Published online
 Pages: 16 pages, 10 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2003.09846
DOI: 10.1103/PhysRevResearch.2.023397
URI: http://arxiv.org/abs/2003.09846
 Degree: -

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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 2 (2) Sequence Number: 023397 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564