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1.	Jonsell, Svante, et al. (author) Metastable states in antihydrogen formation 2014 In: Hyperfine interactions. - : Springer Science and Business Media LLC. - 0304-3843 .- 1572-9540. ; , s. 81-83 Conference paper (peer-reviewed)abstract Formation of antihydrogen atoms from antiprotons immersed in a positron plasma is simulated. Special attention is devoted to the role of metastable states, arising from the near conservation of the energy stored in the cyclotron motion of the positrons. We find that the decay of such states changes the density scaling of the formation rate.
2.	Froelich, Piotr, et al. (author) Four-body treatment of the antihydrogen-positronium system : binding, structure, resonant states and collisions 2019 In: Hyperfine Interactions. - : Springer. - 0304-3843 .- 1572-9540. Conference paper (peer-reviewed)abstract We have developed a coupled-rearrangement-channel method allowing the rigorous non-adiabatic treatment of the multi-channel scattering problem for four particles. We present the study of the binding, resonant and collisional properties of the (H) over bar -Ps system with the total angular momentum J = 0(+) (singlet positronic configuration). The binding energy, the life-times of the resonant states and the collisional cross sections are calculated and discussed. We present the preliminary cross sections for the elastic and inelastic (H) over bar -Ps scattering, notably for the excitation of Ps and for the rearrangement reaction producing the (H) over bar (+) ions.

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Type of publication: conference paper (2)Undo refine

Type of content: peer-reviewed (2)

Author/Editor: Jonsell, Svante (2); Froelich, Piotr (1); van der Werf, D. P. (1); Charlton, M. (1); Yamashita, Takuma (1); Kino, Yasushi (1); show more...; Hiyama, Emiko (1); Piszczatowski, Konra ... (1); show less...

University: Uppsala University (1); Stockholm University (1)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (2)Undo refine

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