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Imaging the Renner-Teller effect using laser-induced electron diffraction.

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Summary
This summary is machine-generated.

Researchers directly determined the structure of excited carbonyl disulfide (CS2) molecules using laser-induced electron diffraction (LIED). This technique achieved picometer and attosecond resolution, revealing ultrafast molecular dynamics.

Keywords:
attosecond wave packetelectron diffractionlaser-induced electron diffractionnonadiabatic dynamicsstructural dynamics

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Area of Science:

  • Physical Chemistry
  • Molecular Spectroscopy
  • Quantum Dynamics

Background:

  • Electronically excited molecules' structures are typically inferred indirectly via spectroscopy and calculations.
  • Direct structural determination of transient molecular states remains a significant challenge.

Purpose of the Study:

  • To demonstrate the direct structural retrieval of neutral carbonyl disulfide (CS2) in an excited electronic state.
  • To showcase the capability of laser-induced electron diffraction (LIED) for ultrafast molecular structure analysis.

Main Methods:

  • Utilized laser-induced electron diffraction (LIED) for direct structural probing.
  • Employed intrapulse pump-probe excitation and measurement for attosecond temporal resolution.
  • Invoked the Renner-Teller effect to populate the target excited electronic state.

Main Results:

  • Successfully retrieved the geometric structure of neutral CS2 in the [Formula: see text] excited state.
  • Unambiguously identified ultrafast symmetric stretching and bending dynamics.
  • Achieved combined picometer spatial and attosecond temporal resolution.

Conclusions:

  • LIED is a sensitive technique for retrieving the geometric structure of molecules, even transient excited states.
  • The study provides direct insights into the dynamics of field-dressed CS2 molecules.
  • This work advances the direct observation of molecular structure and dynamics.