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2001 | 99 | 3-4 | 455-463
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Investigations into the Influence of Hydrogen and Defects on the Spectra of Lifetime of Positrons in Palladium

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The influence of interstitial hydrogen concentration and structural defects caused by quenching of palladium, begun at different temperatures up to the temperature of liquid nitrogen or by stretching by external forces, on spectra of lifetimes of positrons in this metal was investigated. It was found that the spectra of positron lifetimes in the examined systems are best described by their distribution into two components. On the basis of the two-state model of annihilation, the conclusion was drawn that the initial temperature from which quenching of palladium is commenced and also the relative elongation, which is caused by external forces, markedly influence the concentrations and sizes of defects in the sample.
  • Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland
  • Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland
  • Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland
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