On the study of defects in metals with positive muons

The technique of positive muon spin depolarization is reviewed, and its sensitivity to the presence of defects in metals is discussed. Results are presented of an experimental survey on copper, aluminum, indium and beryllium. There are indications of μ+ trapping at defects in neutron-irradiated and deform ed copper, in indium near its m elting point, and in bery lliu m . The results a re dis cu s sed in the context of m u on diffu s