Investigation of positron annihilation-in-flight using a digital coincidence Doppler broadening spectrometer
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10127760" target="_blank" >RIV/00216208:11320/12:10127760 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1367-2630/14/3/035005" target="_blank" >http://dx.doi.org/10.1088/1367-2630/14/3/035005</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1367-2630/14/3/035005" target="_blank" >10.1088/1367-2630/14/3/035005</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of positron annihilation-in-flight using a digital coincidence Doppler broadening spectrometer
Original language description
This work reports on precise measurements of two-quantum positron annihilation-in-flight using a digital coincidence Doppler broadening spectrometer. Annihilation-in-flight was measured for positrons emitted by Ge-68/Ga-68 and Na-22 radioisotopes and forvarious targets. Experimental data were compared with theoretical prediction by quantum electrodynamics. It was found that two-quantum positron annihilation-in-flight can be clearly recognized in two-dimensional coincidence Doppler broadening spectra asa hyperbolic curve with shape described well by the relativistic theory. The contribution of annihilation-in-flight is determined predominantly by the energy of incident positrons and is only weakly dependent on the target material. The profile of the positron annihilation-in-flight contribution for positron kinetic energies above 100 keV is well described by theory.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GAP108%2F11%2F1539" target="_blank" >GAP108/11/1539: Nanocrystalline materials - X-ray characterization of structure and its thermal stability</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
New Journal of Physics
ISSN
1367-2630
e-ISSN
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Volume of the periodical
14
Issue of the periodical within the volume
2 March 2012
Country of publishing house
GB - UNITED KINGDOM
Number of pages
18
Pages from-to
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UT code for WoS article
000302326600003
EID of the result in the Scopus database
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