Temperature dependence of positron trapping at voids in metals
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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6
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Physical Review B, Volume 19, issue 3, pp. 1397-1402
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
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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