A significant feature in the total cross section for positron-helium scattering at the positronium formation threshold

被引：0
|
作者：
Van Reeth, P [1 ]
Humberston, JW [1 ]
机构：
[1] Univ London Univ Coll, Dept Phys & Astron, London WC1E 6BT, England
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1999年 / 32卷 / 05期
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中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Detailed theoretical investigations of e(+)-He scattering reveal a significant step-like rise in the total cross section at the positronium formation threshold. This feature arises from the threshold behaviour of the s-wave contribution to the positronium formation cross section and its magnitude and extent are such that it may be possible to detect it experimentally in the near future.
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页码：L103 / L106
页数：4
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