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Piszczatowski, Konrad
Publications (3 of 3) Show all publications
Froelich, P., Yamashita, T., Kino, Y., Jonsell, S., Hiyama, E. & Piszczatowski, K. (2019). Four-body treatment of the antihydrogen-positronium system: binding, structure, resonant states and collisions. In: Hyperfine Interactions: . Paper presented at 13th International Conference on Low Energy Antiproton Physics (LEAP), MAR 12-16, 2018, Paris, FRANCE. Springer, 240, Article ID 46.
Open this publication in new window or tab >>Four-body treatment of the antihydrogen-positronium system: binding, structure, resonant states and collisions
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2019 (English)In: Hyperfine Interactions, Springer, 2019, Vol. 240, article id 46Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
Springer, 2019
Keywords
Antihydrogen, Positronium, Collisions
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:uu:diva-384079 (URN)10.1007/s10751-019-1572-0 (DOI)000467083400007 ()
Conference
13th International Conference on Low Energy Antiproton Physics (LEAP), MAR 12-16, 2018, Paris, FRANCE
Funder
Swedish Research Council
Available from: 2019-06-18 Created: 2019-06-18 Last updated: 2019-06-18Bibliographically approved
Stegeby, H., Kowalewski, M., Piszczatowski, K. & Karlsson, H. O. (2015). Wave packet simulations of antiproton scattering on molecular hydrogen. Journal of Physics B: Atomic, Molecular and Optical Physics, 48(19), 195204:1-7, Article ID 195204.
Open this publication in new window or tab >>Wave packet simulations of antiproton scattering on molecular hydrogen
2015 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 48, no 19, p. 195204:1-7, article id 195204Article in journal (Refereed) Published
National Category
Theoretical Chemistry Computational Mathematics
Identifiers
urn:nbn:se:uu:diva-261547 (URN)10.1088/0953-4075/48/19/195204 (DOI)000361036700011 ()
Projects
eSSENCE
Available from: 2015-08-28 Created: 2015-09-01 Last updated: 2018-04-22Bibliographically approved
Stegeby, H., Piszczatowski, K., Karlsson, H. O., Lindh, R. & Froelich, P. (2012). Variational calculations for the hydrogen-antihydrogen system with a mass-scaled Born-Oppenheimer potential. CENTRAL EUROPEAN JOURNAL OF PHYSICS, 10(5), 1038-1053
Open this publication in new window or tab >>Variational calculations for the hydrogen-antihydrogen system with a mass-scaled Born-Oppenheimer potential
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2012 (English)In: CENTRAL EUROPEAN JOURNAL OF PHYSICS, ISSN 1895-1082, Vol. 10, no 5, p. 1038-1053Article in journal (Refereed) Published
Abstract [en]

The problem of proton-antiproton motion in the H- system is investigated by means of the variational method. We introduce a modified nuclear interaction through mass-scaling of the Born-Oppenheimer potential. This improved treatment of the interaction includes the nondivergent part of the otherwise divergent adiabatic correction and shows the correct threshold behaviour. Using this potential we calculate the vibrational energy levels with angular momentum 0 and 1 and the corresponding nuclear wave functions, as well as the S-wave scattering length. We obtain a full set of all bound states together with a large number of discretized continuum states that might be utilized in variational four-body calculations. The results of our calculations gives an indication of resonance states in the hydrogen-antihydrogen system.

Keywords
antihydrogen; Born-Oppenheimer approximation; adiabatic approximation; matter-antimatter interactions
National Category
Theoretical Chemistry
Identifiers
urn:nbn:se:uu:diva-188930 (URN)10.2478/s11534-012-0131-y (DOI)000311496400002 ()
Available from: 2012-12-21 Created: 2012-12-21 Last updated: 2018-04-22Bibliographically approved
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