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Updated: Jul 6, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
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Published on: July 27, 2018

Absolute electron scattering cross sections for the CF2 radical.

Todd M Maddern1, Leigh R Hargreaves, Jessica R Francis-Staite

  • 1ARC Centre of Excellence for AntiMatter-Matter Studies, School of Chemistry, Physics and Earth Sciences, Flinders University, Adelaide, Australia. todd.maddern@flinders.edu.au

Physical Review Letters
|March 21, 2008
PubMed
Summary
This summary is machine-generated.

This study measured absolute elastic cross sections for electron scattering from the difluoromethylene (CF2) molecule. The findings provide crucial data for understanding electron-CF2 interactions and validating theoretical models.

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Area of Science:

  • Chemical Physics
  • Atomic and Molecular Physics
  • Cross Section Measurements

Background:

  • Electron scattering experiments are vital for understanding molecular interactions.
  • Accurate cross section data for small fluorinated molecules like CF2 are scarce.
  • Theoretical methods require experimental validation.

Purpose of the Study:

  • To measure absolute elastic differential and integral cross sections for electron scattering from CF2.
  • To establish a new technique for absolute cross section measurements using skimmed supersonic jets.
  • To compare experimental results with theoretical predictions.

Main Methods:

  • Utilized a crossed electron-molecular beam apparatus with pyrolytic radical production.
  • Employed a skimmed nozzle beam generated as a supersonic jet.
  • Measured absolute differential cross sections for electron energies from 30-50 eV and angles from 20-135 degrees.
  • Derived integral cross sections from differential cross section data.

Main Results:

  • Reported absolute differential elastic cross sections for electron-CF2 scattering.
  • Derived integral cross sections from the measured differential data.
  • Presented a new method for scaling cross sections to an absolute scale for supersonic jet beams.

Conclusions:

  • The experimental data provide a valuable benchmark for theoretical calculations.
  • The new scaling technique enhances the accuracy of cross section measurements.
  • This work advances the understanding of electron scattering dynamics for CF2 molecules.