ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A systematic μSR study on nano‐Cu has demonstrated that the diffusion of μ+ in nanocrystalline metals is influenced by both features of the nanostructure, i.e., by the very small grain size and by the comparatively large fraction of grain boundaries. The former feature yields a size effect of the phonon‐assisted muon tunneling, but only at particle diameters below 20 nm. The latter feature, in samples with crystallite sizes above 20 nm diameter, i.e., with bulk diffusional behaviour, establishes a connection between μ+ diffusion coefficient and particle size: if one of these quantities is known, the other could be evaluated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1012607506083
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