Temperature dependence of positron trapping at voids in metals

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
1979-02-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
6
1397-1402
Series
Physical Review B, Volume 19, issue 3
Abstract
We report positron-lifetime measurements in void-containing aluminum samples, which show strong temperature dependence for the positron trapping probability. A theory is presented for the positron motion and trapping in a three-dimensional array of large voids, which compares favorably with the experimental data. It is shown that at low temperatures the trapping is transition limited and strongly temperature dependent with a crossover to diffusion-limited and weakly-temperature-dependent behavior at high temperatures.
Description
Keywords
Other note
Citation
Nieminen , R M , Laakkonen , J , Hautojärvi , P & Vehanen , A 1979 , ' Temperature dependence of positron trapping at voids in metals ' , Physical Review B , vol. 19 , no. 3 , pp. 1397-1402 . https://doi.org/10.1103/PhysRevB.19.1397