THRESHOLD EFFECTS IN POSITRON SCATTERING ON NOBLE-GASES

被引：42

作者：

MOXOM, J

LARICCHIA, G

CHARLTON, M

KOVAR, A

MEYERHOF, WE

机构：

[1] STANFORD UNIV, DEPT PHYS, STANFORD, CA 94305 USA

[2] INST NUCL RES, H-4001 DEBRECEN, HUNGARY

来源：

PHYSICAL REVIEW A | 1994年 / 50卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.50.3129

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The energy dependence of the positronium (Ps) formation cross section for positrons colliding with all the stable inert atoms is analyzed near threshold. Using R-matrix and threshold theories, the corresponding variations with energy of the elastic-scattering and total cross sections are predicted and compared to experiment where possible. As the target atomic number increases from He to Xe, Wigner cusps are predicted to develop in the elastic cross section near the Ps formation threshold, reflecting the progressive increase of the interaction strength between the positron and the atoms.

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页码：3129 / 3133

页数：5

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