Title variants
Languages of publication
Abstracts
Positron lifetime spectra in poly[1-(trimethylsilyl)]propine membranes were collected at different temperatures and various number of accumulated counts, in order to compare the results from analyses obtained by different decay models: discrete (that is, purely exponential) or continuous (with at least one distribution of lifetimes). Analysis into four discrete components is inadequate, unless a low number of counts (1 to 2 millions) is accumulated. Conversely, deconvolutions which allow the ortho-positronium lifetime to be distributed give satisfactory fits, even at the highest statistics (60 millions). An equivalent good fit in terms of χ^{2} test is obtained with a five discrete components analysis, from which it is possible to extract information on the first moments (centroid and standard deviation) of ortho -positronium lifetime distribution.
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)
- 36.10.Dr: Positronium(see also 82.30.Gg Positronium chemistry)
Journal
Year
Volume
Issue
Pages
505-508
Physical description
Dates
published
1999-04
Contributors
author
- Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
author
- Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv95z411kz