Search results

Sort By:

Limit search:

Positron Scattering on Atoms and Molecules in the Limit of Low Energy

100%

Karwasz G., Brusa R., Pliszka D., Idziaszek Z., Nowakowska H.

Acta Physica Polonica A

2006

vol. 110

issue 5

605-614

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.

Refine search results

1 Acta Physica Polonica A

1 2006

1 Brusa R.

1 Idziaszek Z.

1 Karwasz G.

1 Nowakowska H.

1 Pliszka D.

Search results

Positron Scattering on Atoms and Molecules in the Limit of Low Energy