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Calculation of antihydrogen formation via antiproton scattering with excited positronium

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Authors
Rawlins, C.
Kadyrov, A.
Stelbovics, A.
Bray, Igor
Charlton, M.
Date
2016
Type
Journal Article

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Rawlins, C. and Kadyrov, A. and Stelbovics, A. and Bray, I. and Charlton, M. 2016. Calculation of antihydrogen formation via antiproton scattering with excited positronium. Physical Review A - Atomic, Molecular, and Optical Physics. 93 (1): pp. 012709-1 - 012709-14.
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Physical Review A - Atomic, Molecular, and Optical Physics
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Department of Physics and Astronomy
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Abstract

© 2016 American Physical Society. The two-center convergent close-coupling method is used to calculate antihydrogen (H¯) formation via positronium (Ps) scattering on antiprotons (p¯) at near threshold energies. For excited Ps of energy, the 1/ behavior of the H¯ formation cross sections is valid strictly only at the respective threshold, as is the 1/ behavior for Ps in the ground state. Simple equations are given for the H¯(n=4) formation cross sections from Ps(n=3) from zero to around 0.1 eV above threshold. Some of the implications of using p¯-Ps collisions to form antihydrogen in beams, and held in traps, are discussed.