- Tytuł:
- Positron Scattering on Atoms and Molecules in the Limit of Low Energy
- Autorzy:
-
Karwasz, G. P.
Brusa, R. S.
Pliszka, D.
Idziaszek, Z.
Nowakowska, H. - Powiązania:
- https://bibliotekanauki.pl/articles/2047133.pdf
- Data publikacji:
- 2006-11
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
34.85.+x
39.90.+d - Opis:
- Starting from experimental cross-sections for positron scattering in argon and nitrogen, we examine different energy ranges. In the zero-energy limit the cross-section falls with energy and can be described by modified effective range theory for polarization potential. In a few eV range the cross-sections are constant vs. energy. As far as it is possible to force the elastic scattering phase shifts in a way that both experimental differential cross-sections are reproduced and the total cross-section remains constant in energy, such a model lacks the physical justification. Only the virtual-positronium model, developed recently by Gribakin, reproduces a constant dependence of the total cross section in a few eV energy range.
- Źródło:
-
Acta Physica Polonica A; 2006, 110, 5; 605-614
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł