- Tytuł:
- Positronium Probing of Pores in Zirconia Nanopowders
- Autorzy:
-
Prochazka, I.
Cizek, J.
Lukac, F.
Melikhova, O.
Hruska, P.
Anwand, W.
Liedke, M.
Konstantinova, T.
Danilenko, I. - Powiązania:
- https://bibliotekanauki.pl/articles/1033930.pdf
- Data publikacji:
- 2017-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
81.07.Wx
61.46.Hk
78.70.Bj - Opis:
- In the present paper, conventional positron lifetime measurements on selected zirconia-based nanopowders are reported. The nanopowders were doped with various metal cations (Y³⁺, Eu³⁺, Gd³⁺, Lu³⁺ and Mg²⁺). Lifetime experiments were conducted in air and supplemented with mass density measurements. In a range of lifetimes, from a few ns to ≈70 ns, up to two individual lifetime components could be identified. Such observations confirmed positronium (Ps) formation with subsequent ortho-Ps pick-off annihilation as well as the occurrence of pores of different size. Pore sizes were estimated using a shape-free model of the correlation between pore size and ortho-Ps lifetime. The origins of pores are discussed on the basis of the ortho-Ps data in combination with the results of mass density measurements.
- Źródło:
-
Acta Physica Polonica A; 2017, 132, 5; 1564-1567
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł