- Tytuł:
- Positron and Positronium Annihilation in Polymers Studied by Age-Momentum Correlation Spectroscopy
- Autorzy:
-
Sato, K.
Murakami, H.
Ito, K.
Hirata, K.
Kobayashi, Y. - Powiązania:
- https://bibliotekanauki.pl/articles/1812549.pdf
- Data publikacji:
- 2008-05
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
71.60.+z
78.70.Bj
82.30.Gg
42.70.jk - Opis:
- Positron (e⁺) and positronium (Ps) annihilation processes in polymers are studied by positron age-momentum correlation spectroscopy, which can sensitively probe momentum distributions of e⁺, p-Ps, and o-Ps. For polyether sulfone and ethylene tetrafluoroethylene copolymer belonging to oxygen-containing polymers (O group) and fluorine-containing polymers (F group), respectively, significant effects of positron trapping by polar element are observed. The Doppler profile of o-Ps pick-off annihilation is strongly influenced by F atoms, giving rise to anomalous broadening. The results are discussed together with our previous data of the S-I₃ correlation in order to explore the feasibility of chemical analysis around the free volumes by age-momentum correlation spectroscopy.
- Źródło:
-
Acta Physica Polonica A; 2008, 113, 5; 1511-1516
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł