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Self-consistency of electron-THF cross sections using electron swarm techniques.

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Electron transport in tetrahydrofuran (THF) was studied using a pulsed-Townsend technique. Refined electron-THF cross sections improve consistency between measured and simulated transport coefficients.

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Area of Science:

  • Atomic and Molecular Physics
  • Plasma Physics
  • Gas Phase Chemistry

Background:

  • Accurate electron-molecule cross sections are crucial for understanding electron transport in gases.
  • Tetrahydrofuran (THF) is an important industrial chemical, and its electron interaction properties require detailed investigation.

Purpose of the Study:

  • To measure electron drift velocities and Townsend ionization coefficients in gaseous THF.
  • To assess and refine existing electron-THF cross section data using experimental transport coefficients.
  • To investigate the sensitivity of transport properties to uncertainties in cross section databases.

Main Methods:

  • Pulsed-Townsend technique for measuring electron drift velocity and ionization coefficients.
  • Multi-term Boltzmann equation analysis for simulating electron transport.
  • Iterative refinement of electron-THF scattering cross sections.

Main Results:

  • Experimental data for electron drift velocity and first Townsend ionization coefficient in THF were obtained.
  • A refined momentum transfer cross section for electron-THF scattering was developed.
  • Modifications to neutral dissociation and dissociative electron attachment cross sections were proposed.

Conclusions:

  • The refined electron-THF cross section database shows improved self-consistency with experimental transport data.
  • The study provides a validated set of cross sections for electron interactions with THF vapor.
  • This work contributes to a more accurate modeling of electron behavior in THF.