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2006 | 110 | 5 | 605-614
Article title

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

Content
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EN
Abstracts
EN
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.
Keywords
EN
Year
Volume
110
Issue
5
Pages
605-614
Physical description
Dates
published
2006-11
received
2006-06-05
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv110n507kz
Identifiers
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