Elastic electron scattering by C2F4

Area of Science:

• Atomic and Molecular Physics
• Quantum Chemistry
• Scattering Theory

Background:

• Discrepancies exist between experimental and theoretical elastic electron cross sections for tetrafluoroethylene (C(2)F(4)).
• Previous calculations by Winstead and McKoy (2002) differed from recent experimental and theoretical results.
• An unexpected difference in cross section magnitude above approximately 10 eV prompted further investigation.

Purpose of the Study:

• To reexamine and clarify the elastic electron cross section for C(2)F(4).
• To identify and minimize potential sources of error in theoretical calculations.
• To resolve discrepancies with existing experimental and computational data.

Main Methods:

• Theoretical calculations of the elastic electron scattering cross section.
• Systematic reevaluation of computational approximations and potential error sources.
• Comparison of refined theoretical predictions with experimental data.

Main Results:

• The reexamination confirmed a substantially larger elastic electron cross section for C(2)F(4) at higher energies.
• Potential errors in earlier calculations were identified and minimized.
• The refined calculations align with the surprising magnitude observed in recent studies.

Conclusions:

• The revised theoretical approach provides a more accurate prediction of the electron-C(2)F(4) elastic cross section.
• The findings contribute to a better understanding of electron-molecule interactions in fluorocarbons.
• Further experimental validation at higher energies may be warranted.