Positron Annihilation in Pure and Hydrogenated Palladium Deformed by Uniaxial Tension

• Authors: W. Rudzińska , J. Pająk , Cz. Szymański , R. Szatanik
• Languages of publication: EN

Abstracts

EN

Angular distributions of the positron annihilation quanta were measured for pure and hydrogenated palladium samples deformed by uniaxial tension up to different deformation degrees. The relative difference curves, and the values of the R parameter characterizing the dimensions of defects trapping the positrons, were determined. It was found that for relative elongations ranging from 1.9 to 3.5%, in both the pure and hydrogenated palladium, the positrons are trapped in defects larger than vacancy clusters. The values of the R parameter for pure palladium samples elongated up to 0.39, 0.77, and 1.5% indicate a dominant role of smaller defects, like the vacancy clusters.

Keywords

EN

78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 479-486

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

W. Rudzińska

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

J. Pająk

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

Cz. Szymański

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

R. Szatanik

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

References

• 1. R.W.K. Honeycombe, The Plastic Deformation of Metals, Publ. Edward Aarnold, Cambridge 1968
• 2. T.B. Flanagan, W.A. Oates, Ann. Rev. Mater. Sci., 21, 269, 1991
• 3. C. Szymański, S. Chabik, J. Pająk, B. Rozenfeld, Phys. Status Solidi A, 60, 375, 1980
• 4. J.B. Condon, T. Schoher, J. Nucl. Mater., 207, 1, 1991
• 5. W. Triftshauser, Phys. Rev. B, 30, 4634, 1975
• 6. S. Chabik, W. Rudzińska, M. Szuszkiewicz, C. Szymański, in: Materiały 27 Seminarium Anihilacji Pozytonów, Jarnołtówek (Poland), Ed. S. Chabik, Instytut Fizyki Uniwersytetu Opolskiego, Opole 1995, p. 31 (in Polish)
• 7. R. Pietrzak, R. Szatanik, W. Smiatek, to be published

Identifiers

DOI

10.12693/APhysPolA.99.479