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Electron Scattering by Tetrahydrofuran Molecules: Elastic and Electronically Inelastic Interactions.

Yan A C de Avó1, Giseli M Moreira2,3, Romarly F da Costa1

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Electron scattering cross sections for tetrahydrofuran were calculated using the Schwinger multichannel method. Results show excellent agreement with experimental data and literature, particularly for resonances and inelastic scattering.

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Area of Science:

  • Computational Chemistry
  • Atomic and Molecular Physics
  • Quantum Scattering Theory

Background:

  • Understanding electron-molecule interactions is crucial for various chemical and physical processes.
  • Tetrahydrofuran (THF) is an important organic molecule with limited data on its electron scattering properties.

Purpose of the Study:

  • To compute elastic and electronically inelastic electron scattering cross sections for tetrahydrofuran (THF) up to 30 eV.
  • To investigate the influence of multichannel coupling effects on scattering models.
  • To provide a benchmark for previously uncharacterized individual excitation channels in THF.

Main Methods:

  • Employed the Schwinger multichannel method with norm-conserving pseudopotentials for electron scattering calculations.
  • Analyzed five distinct scattering models with varying channel coupling schemes.
  • Calculated elastic and electronically inelastic cross sections for electron-tetrahydrofuran collisions.

Main Results:

  • Computed elastic cross sections show strong agreement with existing experimental data.
  • Identified three π* resonances, with positions matching literature values.
  • Found that the number of coupled channels significantly impacts inelastic cross-section magnitudes.

Conclusions:

  • The Schwinger multichannel method accurately describes electron scattering by tetrahydrofuran.
  • Channel coupling is a critical factor in accurately modeling inelastic electron scattering.
  • The study provides essential data for understanding electron-THF interactions and electronic excitations.