This content will become publicly available on August 29, 2020
Hard-X-Ray Spectroscopy with a Spectrographic Approach
Abstract
Hard-x-ray spectroscopy relies on a suite of modem techniques for studies of vibrational, electronic, and magnetic excitations in condensed matter. At present, the energy resolution of these techniques can be improved only by decreasing the spectral window of the involved optics-monochromators arid analyzers- thereby sacrificing the intensity. Here, we demonstrate hard-x-ray spectroscopy with greatly improved energy resolution without narrowing the spectral window by adapting principles of spectrographic imaging to the hard-x-ray regime. Similar to Newton's classical prism, the hard-x-ray spectrograph disperses different "colors"-i.e., energies-of x-ray photons in space. Then, selecting each energy component with a slit ensures high energy resolution, whereas measuring x-ray spectra with all components of a broad spectral window keeps the intensity. We employ the principles of spectrographic imaging for phonon spectroscopy. Here the new approach revealed anomalous soft atomic dynamics in α-iron, a phenomenon which was not previously reported in the literature. Finally, we argue that hard-x-ray spectrographic imaging also could be a path to discovering new physics in studies of electronic and magnetic excitations.
- Authors:
-
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1574953
- Alternate Identifier(s):
- OSTI ID: 1559391
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 9; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Chumakov, Aleksandr I., Shvyd’ko, Yuri, Sergueev, Ilya, Bessas, Dimitrios, and Rüffer, Rudolf. Hard-X-Ray Spectroscopy with a Spectrographic Approach. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.123.097402.
Chumakov, Aleksandr I., Shvyd’ko, Yuri, Sergueev, Ilya, Bessas, Dimitrios, & Rüffer, Rudolf. Hard-X-Ray Spectroscopy with a Spectrographic Approach. United States. doi:10.1103/PhysRevLett.123.097402.
Chumakov, Aleksandr I., Shvyd’ko, Yuri, Sergueev, Ilya, Bessas, Dimitrios, and Rüffer, Rudolf. Thu .
"Hard-X-Ray Spectroscopy with a Spectrographic Approach". United States. doi:10.1103/PhysRevLett.123.097402.
@article{osti_1574953,
title = {Hard-X-Ray Spectroscopy with a Spectrographic Approach},
author = {Chumakov, Aleksandr I. and Shvyd’ko, Yuri and Sergueev, Ilya and Bessas, Dimitrios and Rüffer, Rudolf},
abstractNote = {Hard-x-ray spectroscopy relies on a suite of modem techniques for studies of vibrational, electronic, and magnetic excitations in condensed matter. At present, the energy resolution of these techniques can be improved only by decreasing the spectral window of the involved optics-monochromators arid analyzers- thereby sacrificing the intensity. Here, we demonstrate hard-x-ray spectroscopy with greatly improved energy resolution without narrowing the spectral window by adapting principles of spectrographic imaging to the hard-x-ray regime. Similar to Newton's classical prism, the hard-x-ray spectrograph disperses different "colors"-i.e., energies-of x-ray photons in space. Then, selecting each energy component with a slit ensures high energy resolution, whereas measuring x-ray spectra with all components of a broad spectral window keeps the intensity. We employ the principles of spectrographic imaging for phonon spectroscopy. Here the new approach revealed anomalous soft atomic dynamics in α-iron, a phenomenon which was not previously reported in the literature. Finally, we argue that hard-x-ray spectrographic imaging also could be a path to discovering new physics in studies of electronic and magnetic excitations.},
doi = {10.1103/PhysRevLett.123.097402},
journal = {Physical Review Letters},
number = 9,
volume = 123,
place = {United States},
year = {2019},
month = {8}
}
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