Near-threshold positron-hydrogen ionization

被引：1
|
作者：
Kadyrov, A. S. [1 ]
Bray, I. [1 ]
Stelbovics, A. T. [1 ]
机构：
[1] Curtin Univ Technol, ARC Ctr Antimatter Matter Studies, Perth, WA 6845, Australia
来源：
FEW-BODY SYSTEMS | 2008年 / 44卷 / 1-4期
关键词：
D O I：
10.1007/s00601-008-0295-6
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Ionization of hydrogen by positron impact near the breakup threshold is considered. The two-centre convergent close-coupling method is used. We find that convergence in the cross section is only practically obtained if two near-complete expansions are used, one centred around H and the other around Ps. The contribution to the breakup cross section becomes the same for both centres as the threshold is approached. The calculations are found to be in good agreement with the threshold law predicted by Ihra et al. (1997) Phys Rev Lett 78:4027.
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页码：221 / 223
页数：3
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