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Absolute and effective cross-sections for low-energy electron-scattering processes within condensed matter
1Groupe CRM en Science des Radiations, Faculté de Médecine, Université de Sherbrooke, Quebec, Canada.
Radiation and Environmental Biophysics
|March 3, 1999
Summary
New experimental methods measure electron interactions with condensed matter. These techniques yield cross-sections for electron trapping, radical formation, and inelastic energy loss in materials.
Area of Science:
- Physics
- Materials Science
- Surface Science
Background:
- Recent advancements in experimental techniques allow for precise measurements of electron interactions with condensed matter.
- Understanding these interactions is crucial for various scientific and technological applications.
Purpose of the Study:
- To review and summarize experimental methods for measuring mean free paths and cross-sections of low-energy electron interactions.
- To present cross-section data for processes such as electron trapping, dissociation, and inelastic energy loss.
Main Methods:
- Low-energy electron transmission (LEET)
- High-resolution electron energy loss (HREEL) spectroscopy
- X-ray photoelectron spectroscopy (XPS)
- Electron-stimulated desorption (ESD)
Main Results:
- LEET provides data on quasi-elastic and inelastic mean free paths, electron trapping, and fragment production.
- HREEL yields absolute cross-sections for inelastic losses in amorphous ice for 1-20 eV electrons.
- ESD and XPS generate effective cross-sections for neutral and ionic radical formation.
Conclusions:
- A range of experimental techniques are available for studying low-energy electron interactions with condensed matter.
- These methods provide valuable cross-section data crucial for understanding electron-matter interactions in the 0-20 eV range.