A joint theoretical and experimental study for elastic electron scattering from 1,4-dioxane.
P Palihawadana1, J P Sullivan, S J Buckman
1Centre for Antimatter-Matter Studies, Research School of Physics and Engineering, Australian National University, Canberra, ACT, Australia.
The Journal of Chemical Physics
|July 5, 2013
Summary
This study measured elastic electron scattering from 1,4-dioxane, providing the first absolute cross-section data. Results show good agreement with R-matrix theory but less so with the independent atom model.
Area of Science:
- Atomic and Molecular Physics
- Quantum Chemistry
- Electron Scattering
Background:
- Elastic electron scattering provides insights into molecular electronic structure.
- 1,4-dioxane is an important industrial solvent, but its electron scattering properties are not well-documented.
- Accurate cross-section data is crucial for understanding electron-matter interactions.
Purpose of the Study:
- To measure absolute differential and integral elastic electron scattering cross sections for 1,4-dioxane.
- To compare experimental data with theoretical calculations using R-matrix and IAM-SCAR models.
- To establish a benchmark dataset for electron scattering from 1,4-dioxane.
Main Methods:
- Absolute elastic differential and integral cross sections were measured using a crossed electron-molecule beam spectrometer.
- Measurements were performed at energies from 10-30 eV and scattering angles from 20°-129°.
- Data was compared with R-matrix calculations (0-20 eV) and Independent Atom Model with Screening Corrected Additivity Rule (IAM-SCAR) calculations (1-1000 eV).
Main Results:
- Good agreement was observed between measured cross sections and R-matrix computations.
- Satisfactory agreement between experimental data and IAM-SCAR calculations was found only at 30 eV.
- This study presents the first published absolute elastic electron scattering data for 1,4-dioxane.
Conclusions:
- The R-matrix method accurately describes elastic electron scattering from 1,4-dioxane in the studied energy range.
- The IAM-SCAR model shows limitations in describing scattering at lower energies.
- These findings contribute essential data for theoretical and applied studies involving 1,4-dioxane.
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