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Area of Science:

  • Quantum dynamics
  • Molecular physics
  • Ultrafast spectroscopy

Background:

  • Observing attosecond electron movement in molecules requires high temporal and spatial resolution.
  • X-ray scattering methods show promise for ultrafast electron dynamics but require further investigation into signal sensitivity and dynamic reconstruction.

Purpose of the Study:

  • To simulate core-hole dynamics and electron currents in oxazole following inner-shell ionization.
  • To assess the viability of X-ray scattering as a probe for ultrafast electronic processes.

Main Methods:

  • Time-dependent density functional theory (TD-DFT) simulations.
  • X-ray scattering theory.
  • Simulations of stationary core-holes and electron dynamics.

Main Results:

  • Sudden core-hole ionization significantly alters the X-ray scattering response.
  • Electron currents generated by ionization manifest as measurable modulations in time-dependent X-ray scattering signals.
  • X-ray scattering is sensitive to electronic density changes.

Conclusions:

  • X-ray scattering is a viable technique for probing electronic processes on attosecond timescales.
  • The study provides a theoretical framework for interpreting X-ray scattering data in ultrafast molecular dynamics.
  • This method can capture electronic dynamics faster than nuclear motion.