Positron lifetime studies on thorium oxide powders
- 1 March 1982
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 45 (3) , 509-518
- https://doi.org/10.1080/01418618208236186
Abstract
Positron lifetime spectra have been studied for ThO2. powders, calcined at different temperatures and having different particle sizes. Three lifetime components could be resolved, the longest component being of low intensity. An observed strong dependence on the particle size of the annihilation process and the variation of positronium diffusion constant is explained on the basis of defect density variations in these powders.Keywords
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