Temperature dependence of positron trapping at voids in metals
Research output: Contribution to journal › Article › Scientific › peer-review
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.
|Number of pages||6|
|Journal||Physical Review B|
|Publication status||Published - 1 Feb 1979|
|MoE publication type||A1 Journal article-refereed|