Systematic Measurements of Doppler-Coincidence Spectra for Positron Annihilation in Pure Metals and Semiconductors

• Authors: W. Deng , D. Pliszka , R. Brusa , G. Karwasz , A. Zecca
• Languages of publication: EN

Abstracts

EN

Doppler-broadening measurements of the electron-positron annihilation line in twenty six elements are presented. The adopted coincidence technique allows to reduce the background and point out the contribution of positron annihilation with core electrons. The changes of the high momentum contribution is presented for selected examples and a semiempirical analysis of the dependence on electronic structure is performed. Measured data are in a good agreement with recent theoretical calculations and can be used to identification of impurities surrounding open volume defects.

Keywords

EN

71.60.+z; 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)
• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 101
• Issue: 6
• Pages: 875-892

Dates

published

2002-06

received

2002-01-21

(unknown)

2002-04-04

Contributors

author

W. Deng

• Istituto Nazionale per la Fisica della Materia, Unita di Trento, 38050 Povo, Italy

author

D. Pliszka

• Institute of Physics, Pomeranian Pedagogical University, 76-200 Słupsk, Poland

author

R. Brusa

• Istituto Nazionale per la Fisica della Materia, Unita di Trento, 38050 Povo, Italy

author

G. Karwasz

• Istituto Nazionale per la Fisica della Materia, Unita di Trento, 38050 Povo, Italy
• Institute of Physics, Pomeranian Pedagogical University, 76-200 Słupsk, Poland

author

A. Zecca

• Istituto Nazionale per la Fisica della Materia, Unita di Trento, 38050 Povo, Italy

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Identifiers

DOI

10.12693/APhysPolA.101.875