Abstract
The temperature dependence of lineshape parameters obtained from Doppler profile measurements (from 7 to 350 K) is presented for rolled and unrolled Pb, Pb(Cd), and Pb(Tl) alloys. It is demonstrated that positrons can be used to detect microporosity and dislocations in Pb(Cd) alloys. The porosity is greatly reduced by rolling. Positron trapping by the Pb(Cd) alloys in the as-worked state is attributable to dislocations.
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