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Open Access Publications from the University of California

Two-dimensional x-ray correlation spectroscopy of remote core states.

  • Author(s): Healion, Daniel
  • Zhang, Yu
  • Biggs, Jason D
  • Hua, Weijie
  • Mukamel, Shaul
  • et al.

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Nonlinear all-X-ray signals that involve large core-atom separation compared to the X-ray wavelengths may not be described by the dipole approximation since they contain additional phase factors. Expressions for the rotationally averaged 2D X-ray photon echo signals from randomly oriented systems that take this position-dependent phase into account for arbitrary ratio between the core separation and the resonant wavelength are presented. Application is made to the Se K-edge of a selenium dipeptide system.

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