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Hannover 2020 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 9: Poster Session - Atomic Physics I

A 9.2: Poster

Montag, 9. März 2020, 16:00–18:00, Empore Lichthof

Formation of the positive ion of antihydrogen via radiative attachment of a positron to antihydrogen — •Andreas Jacob1, Carsten Müller1, Alexander B. Voitkiv1, Shaofeng Zhang2, and Xinwen Ma21Institute for Theoretical Physics I, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany — 2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

The formation of positive ions of antihydrogen (H+) via radiative attachment of free positrons (e+) to antihydrogen (H) is studied [1]. The attachment mechanisms considered include: (i) spontaneous radiative attachment in which an incident e+ is captured into the ground state of H+ via photo emission; (ii) induced radiative attachment in which H+ is formed due to photo emission induced by a laser field; (iii) two-center dileptonic attachment where an incident e+ is captured by H moving in a gas of matter atoms B and capture proceeds via resonant transfer of energy excess to B which becomes excited and then stabilizes via spontaneous radiative decay [2]. We compare these mechanisms with each other and show that (ii) and (iii) can strongly dominate over (i).

[1] A. Jacob, C. Müller, A. B. Voitkiv, S. F. Zhang and X. Ma (2019), submitted to Phys. Rev. Research.

[2] A. Jacob, C. Müller, and A. B. Voitkiv, Phys. Rev. A 100, 012706 (2019).

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