Calculation of Positron Response from Embedded Nanoparticles

• Authors: J. Kuriplach
• Languages of publication: EN

Abstracts

EN

Nanoparticles embedded in a matrix can trap positrons under certain conditions. In such cases nanoparticles can be effectively studied by means of positron annihilation because positron annihilation characteristics contain information related to nanoparticles' electronic and atomic structure. Of great importance is to calculate the positron response from such nanoparticles. Then, nanoparticles can, in principle, be identified by comparing the measured and calculated positron annihilation response. For this purpose we present an efficient computational method based on the well-known atomic superposition technique. This method is explained in detail, justified on the basis of first principles calculations, and applied to Cu nanoparticles embedded in the Fe matrix.

Keywords

EN

78.70.Bj; 71.60.+z; 61.46.+w; 81.40.Np

Discipline

• 81.40.Np: Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure(see also 62.20.M- Structural failure of materials)
• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)
• 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: 2005
• Volume: 107
• Issue: 5
• Pages: 784-791

Dates

published

2005-05

received

2004-09-20

Contributors

author

J. Kuriplach

• Department of Low Temperature Physics, Charles University, V Holešovičkách 2, 180 00 Prague, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.107.784