Helium-antihydrogen scattering at low energies
2012 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 14, 035013- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2012. Vol. 14, 035013- p.
IdentifiersURN: urn:nbn:se:su:diva-76135DOI: 10.1088/1367-2630/14/3/035013ISI: 000302370700002OAI: oai:DiVA.org:su-76135DiVA: diva2:526123