Helium-antihydrogen scattering at low energies

被引：7

作者：

Jonsell, S. ^{[1
]}

Armour, E. A. G. ^{[2
]}

Plummer, M. ^{[3
]}

Liu, Y. ^{[2
]}

Todd, A. C. ^{[2
]}

机构：

[1] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[2] Univ Nottingham, Sch Math Sci, Nottingham NG7 2RD, England

[3] STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

NEW JOURNAL OF PHYSICS | 2012年 / 14卷

基金：

英国工程与自然科学研究理事会; 瑞典研究理事会;

关键词：

POSITRON-ANNIHILATION; HE; APPROXIMATION; MOLECULES; ATOMS;

D O I：

10.1088/1367-2630/14/3/035013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculate cross sections for helium-antihydrogen scattering for energies up to 0.01 atomic unit. Our calculation includes elastic scattering, direct antiproton-alpha particle annihilation and rearrangement into He(+)p(-) and ground-state positronium. Elastic scattering is calculated within the Born-Oppenheimer approximation using the potential calculated by Strasburger et al (2005 J. Phys. B: At. Mol. Opt. Phys. 38 3091). Matrix elements for rearrangement are calculated using the T-matrix in the distorted wave approximation, with the initial state represented by Hylleraas-type functions. The strong force, leading to direct annihilation, was included as a short-range boundary condition in terms of the strong-force scattering length.

引用

页数：16

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