Syllabus
* Basic properties of positrons
* positron annihilation with electron
* positron sources
* positrons in solids: thermalization, diffusion, implantation profile
* positron trapping in defects, simple trapping model
* observables related to positron annihilation
- positron lifetime
- Doppler shift in energy of annihilation radiation
* basic experimental techniques
- positron lifetime spectroscopy
- angular correlation of annihilation radiation
- Doppler broadening of annihilation photo-peak
- coincidence Doppler broadening spectroscopy
- variable energy slow positron beams
* positron annihilation spectroscopy in metals, semiconductors and insulators
- electron structure and defects
- positron trapping in vacancies
- positron trapping at dislocations
- positron confinement in precipitates, positron affnity
- local chemical environment of defects
* Ab-initio calculations of positron annihilation observables
* Positronium (Ps)
- basic properties of Ps
- formation, behavior and annihilation of Ps in solids
- Ps as a probe of open volume
Annotation
Basic principles of positron annihilation spectroscopy (PAS). Subatomic physics and nuclear experimental methods relevant to PAS. Positrons and positronium in condensed matter. Basic experimental techniques of PAS: positron lifetime spectrometry, measurements of Doppler shift, angular correlations of annihilation photons. The applications of
PAS to the investigations of the electonic structure, lattice defects and free volume. The main application areas of PAS: metals, semiconductors and polymers. For students of physics courses, teaching, and doctoral students.