Resonance Trapping of Positrons in Solids

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

Abstracts

EN

Basing on a new approach to the calculations of the positron trapping rate, an attempt ',was made to explain the prevacancy effects observed in positron annihilation measurements in metals. The defect in the calculation is represented by a complex potential: the real part of it is responsible for the scattering and the imaginary part - for the trapping of incoming positrons. It is shown that the resonance trapping of the positron s-wave and p-wave at low temperature and d-wave and f-wave in prethermal regions provide substantial contributions to the trapping rate of positrons. The calculations were done for the point defect and for the dislocation, taking into account the thermal distribution of the positron energy and the thermal expansion of the crystal lattice. The resonance trapping of positrons could be responsible for prevacancy effects in metals and could help to solve some problems in the study of positron annihilation.

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)

• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 83
• Issue: 3
• Pages: 293-296

Dates

published

1993-03

Contributors

author

J. Dryzek

• Institute of Nuclear Physics, Radzikowskiego 152, 31-342 Kraków, Poland

Identifiers

DOI

10.12693/APhysPolA.83.293