0000000000297136

AUTHOR

A.a. Kluza

showing 4 related works from this author

Positron Annihilation in Metals Defected by Action of the Tensile Force

2006

Results of experimental investigations of uniaxially elongated mono- and polycrystalline samples of several metals (Fe, Ta, Pd, Ag, and Au), performed using the positron annihilation methods, are reviewed. The dependences of the S-parameters and positron lifetimes on the relative elongation of the samples were presented. The data obtained for polycrystalline samples indicate that in the proportionality and limited proportionality regions the changes in the physical properties are governed mainly by generation of vacancies and by kinetics of formation and transformations of vacancy clusters occurring flrst of all on the grain boundaries of monocrystallites. In the region of plastic deformati…

Monocrystalline siliconCondensed Matter::Materials SciencePositronMaterials scienceCondensed matter physicsVacancy defectKineticsGeneral Physics and AstronomyGrain boundarySlip (materials science)CrystalliteElongationActa Physica Polonica A
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Positron Annihilation in Steel Samples Deformed by Uniaxial Tension

2008

Angular distributions of the positron annihilation quanta were measured for steel ST2 SAL samples deformed by uniaxial tension up to difierent deformation degrees. The dependences of the S parameter on the relative elongation of the samples are presented. The positron annihilation data for steel are compared with the results obtained previously for polycrystalline iron samples deformed by uniaxial tension up to difierent deformation degrees in the proportionality and limited proportionality regions.

PhysicsCondensed matter physicsUniaxial tensionGeneral Physics and AstronomyCrystalliteDeformation (meteorology)ElongationPhysics::Classical PhysicsPositron annihilationActa Physica Polonica A
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Positron Lifetime in Hostaphan

2006

Positron lifetime measurements in hostaphan RNK, used for encapsulation of Na positron sources, were performed. It was found that the parameter of positron lifetime spectra in hostaphan RNK differ markedly from those for other forms of polyethylene terephthalate. The maximum penetration depth of positrons from RNK hostaphan amounts 0.42 mm. The information gained in the present study is of great importance for experimenters using hostaphan RNK for encapsulation of positron sources.

chemistry.chemical_compoundMaterials sciencePositronchemistryAstrophysics::High Energy Astrophysical PhenomenaRadiochemistryPolyethylene terephthalatePhysics::Accelerator PhysicsGeneral Physics and AstronomyHigh Energy Physics::ExperimentPenetration depthActa Physica Polonica A
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Positron Annihilation in Polycrystalline Metals Deformed by Uniaxial Tension

2005

Angular distributions of the positron annihilation quanta were measured for polycrystalline samples deformed by uniaxial tension up to difierent deformation degrees. The S parameter as a function of the W parameter was determined. The data obtained for samples elongated up to difierent elongation degrees indicate that in the proportionality and limited proportionality regions the changes in the physical properties of samples are governed mainly by generation of vacancies and formation and kinetics of transformations of vacancy clusters occurring flrst of all on the grains of monocrystallites. In the region of plastic deformations the dominant defects are dislocations and vacancies and their…

Condensed Matter::Materials ScienceMaterials scienceCondensed matter physicsVacancy defectUniaxial tensionGeneral Physics and AstronomyCrystalliteSlip (materials science)ElongationDislocationPositron annihilationActa Physica Polonica A
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