Elastic Positron Collisions with 1,1-Difluoroethylene

Area of Science:

• Atomic and Molecular Physics
• Quantum Chemistry
• Collision Physics

Background:

• Positron scattering experiments provide insights into molecular electronic structures.
• Theoretical calculations are crucial for interpreting experimental data and predicting scattering behavior.
• 1,1-difluoroethylene is a molecule of interest due to its unique electronic properties.

Purpose of the Study:

• To theoretically investigate elastic positron collisions with 1,1-difluoroethylene.
• To calculate integral and differential cross sections for these collisions.
• To refine existing experimental cross-section measurements.

Main Methods:

• Schwinger multichannel method (SMC) employed at the static-plus polarization level.
• Born-closure procedure incorporated to account for the target's permanent dipole moment.
• Theoretical framework for calculating scattering cross sections.

Main Results:

• Calculated integral and differential cross sections for positron-1,1-difluoroethylene scattering up to 10 eV.
• Provided a theoretical basis for understanding the collision dynamics.
• Differential cross sections used to estimate corrections to experimental total cross section data.

Conclusions:

• The theoretical investigation offers valuable data for positron-1,1-difluoroethylene interactions.
• The employed methods provide accurate cross-section predictions.
• This work contributes to the broader understanding of electron-molecule and positron-molecule scattering phenomena.