Autor: Szymański, Cz. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Positron Annihilation in Solid and Liquid Bi$\text{}_{40}$Sn$\text{}_{60}$ Alloy
Autorzy:: Chabik, St.
Rudzińska, W.
Szuszkiewicz, M.
Szymański, Cz.
Powiązania:: https://bibliotekanauki.pl/articles/2007925.pdf
Data publikacji:: 1999-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 64.70.Dv
61.72.Cc
78.70.Bj
Opis:: The peak counting rate, F(T), for Bi$\text{}_{40}$Sn$\text{}_{60}$ alloy in the temperature range from room temperature to 400°C was measured in three consecutive heating-cooling runs. Significant changes in F(T) were observed in the temperature interval between the solidus and liquidus temperature. The magnitude of these anomalies systematically diminishes in consecutive heating-cooling runs. Noticeable changes of values of F(T) parameter in the liquid alloy were observed, too. These effects were connected with trapping of positrons at the grain boundaries-defects and in the short-range ordered regions in the liquid alloy. Also microscopic structure of sample before and after measurements cycles was observed.
Źródło:: Acta Physica Polonica A; 1999, 95, 4; 479-482
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Positron Annihilation in Pure and Hydrogenated Palladium Deformed by Uniaxial Tension
Autorzy:: Rudzińska, W.
Pająk, J.
Szymański, Cz.
Szatanik, R.
Powiązania:: https://bibliotekanauki.pl/articles/2025764.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 78.70.Bj
Opis:: Angular distributions of the positron annihilation quanta were measured for pure and hydrogenated palladium samples deformed by uniaxial tension up to different deformation degrees. The relative difference curves, and the values of the R parameter characterizing the dimensions of defects trapping the positrons, were determined. It was found that for relative elongations ranging from 1.9 to 3.5%, in both the pure and hydrogenated palladium, the positrons are trapped in defects larger than vacancy clusters. The values of the R parameter for pure palladium samples elongated up to 0.39, 0.77, and 1.5% indicate a dominant role of smaller defects, like the vacancy clusters.
Źródło:: Acta Physica Polonica A; 2001, 99, 3-4; 479-486
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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