Genetic Algorithms for Positron Lifetime Data

• Authors: A. Karbowski , J. Fisz , G. Karwasz , J. Kansy , R. Brusa
• Languages of publication: EN

Abstracts

EN

Recently, genetic algorithms have been applied for ultrafast optical spectrometry in systems with several convoluted lifetimes. We apply these algorithms and compare the results with POSFIT (by Kirkegaard and Eldrup) and LT programme (by Kansy). The analysis was applied to three types of samples: molybdenum monocrystals, Czochralski-grown silicon with oxygen precipitates, Si with under-surface cavities obtained by He + H ion co- implantation. In all three tests, the genetic algorithm performs very well, in particular for short lifetimes. Further developments to model the resolution function in genetic algorithms are needed.

Keywords

EN

71.60.+z; 78.70.Bj; 71.55.Cn

Discipline

• 71.55.Cn: Elemental semiconductors
• 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: 2008
• Volume: 113
• Issue: 5
• Pages: 1365-1372

Dates

published

2008-05

received

2007-09-03

Contributors

author

A. Karbowski

• Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland

author

J. Fisz

• Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland

author

G. Karwasz

• Institute of Physics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland

author

J. Kansy

• Institute of Physics, Silesian University, Bankowa 12, 40- 007 Katowice, Poland

author

R. Brusa

• Dipartimento di Fisica, Universitá di Trento, Via Sommarive 14, I-38050 Povo, Trento, Italy

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Identifiers

DOI

10.12693/APhysPolA.113.1365