- Tytuł:
- Discrete and Continuous Analysis of Positron Lifetime Spectra: a Comparison
- Autorzy:
-
Consolati, G.
Quasso, F. - Powiązania:
- https://bibliotekanauki.pl/articles/2007998.pdf
- Data publikacji:
- 1999-04
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
36.10.Dr
71.60.+z
78.70.Bj - Opis:
- 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$\text{}^{2}$ 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.
- Źródło:
-
Acta Physica Polonica A; 1999, 95, 4; 505-508
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł