Cited by 36X-ray Spectroscopy and Fluorescence AnalysisLaser-Matter Interactions and ApplicationsAdvanced X-ray Imaging Techniques

Stochastic stimulated electronic x-ray Raman spectroscopy

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Kimberg, Victor, Rohringer, Nina·2016·Structural Dynamics

Abstract

Resonant inelastic x-ray scattering (RIXS) is a well-established tool for studying electronic, nuclear, and collective dynamics of excited atoms, molecules, and solids. An extension of this powerful method to a time-resolved probe technique at x-ray free electron lasers (XFELs) to ultimately unravel ultrafast chemical and structural changes on a femtosecond time scale is often challenging, due to the small signal rate in conventional implementations at XFELs that rely on the usage of a monochromator setup to select a small frequency band of the broadband, spectrally incoherent XFEL radiation. Here, we suggest an alternative approach, based on stochastic spectroscopy, which uses the full bandwidth of the incoming XFEL pulses. Our proposed method is relying on stimulated resonant inelastic x-ray scattering, where in addition to a pump pulse that resonantly excites the system a probe pulse on a specific electronic inelastic transition is provided, which serves as a seed in the stimulated scattering process. The limited spectral coherence of the XFEL radiation defines the energy resolution in this process and stimulated RIXS spectra of high resolution can be obtained by covariance analysis of the transmitted spectra. We present a detailed feasibility study and predict signal strengths for realistic XFEL parameters for the CO molecule resonantly pumped at the O1s→π* transition. Our theoretical model describes the evolution of the spectral and temporal characteristics of the transmitted x-ray radiation, by solving the equation of motion for the electronic and vibrational degrees of freedom of the system self consistently with the propagation by Maxwell equations.

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Crossref · 10.1063/1.4940916

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  • Unaligned molecular targets at currently obtainable peak brilliances will give rise to soft x-ray Raman amplification of only a few per cent.

    “As opposed to the studies in neon, where a Raman gain of up to eight orders of magnitude has been demonstrated [59], unaligned molecular targets at currently obtainable peak brilliances will give rise to soft x-ray Raman amplification of only a few per cent [62,63].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [62]

  • In the soft x-ray range in gas-phase targets, the Raman gain could be strongly enhanced by several orders of magnitude by pre-aligning the molecular target.

    “In the soft x-ray range in gas-phase targets the Raman gain could be strongly enhanced by several orders of magnitude by pre-aligning the molecular target [62].”

    From Roadmap of ultrafast x-ray atomic and molecular physics (2018) · cites this paper as [62]

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Research works printed but not linked: 1

  1. [51]W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, Numerical Recipes: The Art of Scientific Computing, 3rd ed. (Cambridge University Press, Cambridge, 2007).

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Authors
Kimberg, V., & Rohringer, N.
Affiliations
Max Planck Institute for the Physics of Complex Systems (DE)
Venue
Structural Dynamics
Published
2016-02-09
Volume
3
Issue
3
Pages
034101-034101
ISSN
2329-7778 (ISSN-L)
OpenAlex
W2244351764
Cited by
36
References
67
Citations by year
2025: 1 · 2024: 1 · 2023: 5 · 2022: 4 · 2021: 8 · 2020: 3 · 2019: 5 · 2018: 5 · 2017: 1 · 2016: 3
FWCI
5.23
Type
journal article
Language
en
Open access
Locations
  • Structural Dynamics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Knut och Alice Wallenbergs Stiftelse (KAW-2013.0020, 2013-0020)
  • Max-Planck-Gesellschaft
  • Vetenskapsrådet (2013.0020)
Topics
  • Physical Sciences › Physics and Astronomy › Radiation › X-ray Spectroscopy and Fluorescence Analysis
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
  • Physical Sciences › Physics and Astronomy › Radiation › Advanced X-ray Imaging Techniques
Keywords
X-ray free-electron laser, time-resolved spectroscopy, covariance analysis, spectral coherence, CO molecule, electronic transitions, femtosecond dynamics, ultrafast structural dynamics

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