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- Title
On the Characterization of Small-Scale Samples Using Radioisotope Positron Sources.
- Authors
SARO, M.; KRSJAK, V.; PETRISKA, M.; SLUGEN, V.
- Abstract
Probing of small-scale samples such as thin ion-implanted layers or TEM discs using conventional radioisotope sources is a rather complicated task due to the range of energies of the emitted positron. Besides, experimental spectra obtained from samples containing internal transmutation-based positron source are naturally disturbed by positron annihilation outside of the sample. To estimate these contributions to the spectra, the Geant4 simulation toolkit was used. In addition to various absorption profiles of positrons from realistic encapsulated sources, the use of TEM disc containing 44Ti/44Sc as an external positron source is discussed and suggested.
- Subjects
POSITRON annihilation; RADIOISOTOPES; POSITRONS; POSITRONIUM
- Publication
Acta Physica Polonica: A, 2020, Vol 137, Issue 2, p193
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.137.193