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Related Experiment Video

Updated: May 18, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

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Published on: July 27, 2018

Imaging polyatomic molecules in three dimensions using molecular frame photoelectron angular distributions.

J B Williams1, C S Trevisan, M S Schöffler

  • 1Department of Physics, Auburn University, Auburn, Alabama 36849, USA.

Physical Review Letters
|September 26, 2012
PubMed
Summary
This summary is machine-generated.

Researchers imaged molecules using photoelectron focusing. This method determines the full three-dimensional molecular-frame photoelectron angular distribution, revealing molecular structure from electron trajectories.

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Area of Science:

  • Chemical Physics
  • Molecular Imaging
  • Quantum Dynamics

Background:

  • Determining molecular structure and dynamics is crucial in chemistry.
  • Photoelectron spectroscopy is a powerful tool for probing molecular electronic structure.
  • Understanding molecular frame photoelectron angular distributions (MF-PADs) provides detailed insights.

Purpose of the Study:

  • To demonstrate a novel method for measuring full three-dimensional MF-PADs in polyatomic molecules.
  • To utilize methane as a prototype molecule for this advanced technique.
  • To correlate photoelectron trajectories with molecular orientation and fragmentation.

Main Methods:

  • Employing simultaneous double Auger decay and subsequent dissociation of methane.
  • Measuring the momenta of ionic fragments (H+, H+, CH2+) and the photoelectron in coincidence.
  • Utilizing a three-ion decay pathway for complete molecular orientation determination.

Main Results:

  • Successfully measured the full three-dimensional MF-PADs for methane.
  • Observed a striking focusing of photoelectrons along molecular bond directions at low energies.
  • Demonstrated that this focusing effect effectively images the molecule.

Conclusions:

  • The developed method allows for detailed three-dimensional molecular imaging.
  • Photoelectron focusing provides a unique pathway to visualize molecular structure.
  • This technique opens new avenues for studying molecular dynamics and electronic properties.