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http://hdl.handle.net/20.500.12128/8437
Tytuł: | Influence of the isothermal annealing on the free volume changes inthermo-shrunken polyethylene by positron annihilation |
Autor: | Osoba, Wojciech |
Słowa kluczowe: | pozytrony; anihilacja pozytonów |
Data wydania: | 2001 |
Źródło: | Acta Physica Polonica A, Vol. 99, nr 3/4 (2001), s. 447-454 |
Abstrakt: | Positron lifetime measurements in polyethylene have been performed. Samples of the polyethylene were isothermally annealed at three temperatures (373 K , 423 K , and 473 K ) for different time periods (from 5 min to
5 h). After cooling, the samples were used for the lifetime measurements in air at room temperature. A conventional fast-slow coincidence lifetime spectrometer with plastic scintillators has been used to perform the lifetime measurements. Mean free volumes radii and fractional free volume have been calculated from the lifetime data. |
URI: | http://hdl.handle.net/20.500.12128/8437 |
ISSN: | 0587-4246 |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
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