Low-Energy Positron-Matter Interactions Using Trap-Based Beams
Abstract
We present an overview of nonneutral plasma techniques developed to study the interaction of low-energy positrons with atoms and molecules. Both scattering and positron annihilation experiments are described. The scattering experiments provide the first state-resolved cross sections for both vibrational excitation of molecules and electronic excitation of atoms and molecules by positron impact. The annihilation experiments provide the first energy-resolved measurements of positron annihilation. Extensions of these techniques are briefly discussed, including work to create a new generation of positron beams with multi-electron volt energy resolution and the development of methods to study atomic clusters and dust grains.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 24, 2002
- Accession Number
- ADP012491
Entities
People
- J. P. Marler
- J. P. Sullilvan
- L. D. Barnes
- Philipp Schmidt
- S. J. Gilbert
Organizations
- University of California, San Diego