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Low-Energy Electron Scattering from Dimethyl Ether.

Nidhi Sinha1, Bobby Antony1

  • 1Atomic and Molecular Physics Lab, Department of Physics, Indian Institute of Technology, Dhanbad, Dhanbad, Jharkhand 826004, India.

The Journal of Physical Chemistry. A
|April 21, 2020
PubMed
Summary

This study presents the first electronic excitation and momentum transfer cross sections for dimethyl ether molecules using R-matrix and optical potential methods. Results show good agreement with prior data, offering valuable insights into electron scattering. Keywords: dimethyl ether, electron scattering, cross sections.

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry

Background:

  • Dimethyl ether is a molecule of interest in various chemical processes.
  • Understanding electron scattering dynamics is crucial for atmospheric and plasma chemistry.

Purpose of the Study:

  • To compute electronic excitation and momentum transfer cross sections for dimethyl ether.
  • To investigate electron scattering at both low and high energies.
  • To validate computational methods by comparing results with existing data.

Main Methods:

  • Utilized R-matrix calculations for low-energy electron scattering (0.1-15 eV).
  • Employed spherical complex optical potential formalism for high-energy calculations (11-5000 eV).
  • Applied an effective potential method to account for the molecular nature of dimethyl ether.

Main Results:

  • Reported novel low-energy electronic excitation and momentum transfer cross sections for dimethyl ether.
  • Differential cross sections at low energies align in shape with previous studies but show higher magnitudes.
  • Calculations at overlapping energies between the two methods demonstrated good consistency.

Conclusions:

  • The study provides the first comprehensive cross-section data for electron scattering on dimethyl ether.
  • The applied effective potential method is effective for molecular targets in electron scattering calculations.
  • The findings contribute to a better understanding of the electron-molecule interactions of dimethyl ether.