Effect of structure elements of Sn-In alloy on the positron annihilation

In order to argue that structure elements in alloys may play an important role in the positron localization in traps generated by the structure we performed studies on an In-Sn alloy. For our preliminary studies twenty samples of Sn-In alloys of different composition and pure Sn and In samples were prepared. Calculated amounts of high purity Sn (99.9%) and In (99.99%) were melted in argon atmosphere and then cooled to a temperature some degrees below the melting points, then the samples were annealed at this temperature for 48 h, and after that slowly cooled down during 74 h to room temperature. After measurements of the Doppler broadening of the annihilation line, a second series of measurements were performed on the samples after heavy plastic deformation made by rolling the samples to 50% reduction of their thickness. (orig.)