On formation of exotic particles at channeling of low energy antiprotons in LiH crystals

• Published in: Hyperfine interactions Vol. 240; no. 1; pp. 1 - 7
• Main Authors: Vysotskii, Vladimir I., Maksyuta, Nikolai V., Dabagov, Sultan B.
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 2019; Springer Nature B.V
• Subjects: 12-16 March 2018; Antiparticles; Antiprotons; Atomic; Atomic properties; Channeling; Condensed Matter Physics; Coulomb potential; Crystal lattices; France; Hadrons; Heavy Ions; Lithium ions; Mathematical analysis; Matter & antimatter; Molecular; Nuclear Physics; Optical and Plasma Physics; Particle beams; Physics; Physics and Astronomy; Probability; Proceedings of the 13th International Conference on Low Energy Antiproton Physics (LEAP 2018) Paris; Surfaces and Interfaces; Thin Films; Antiproton lithium ion; Sudden-perturbation theory; Protonium atom; Channeling; Hydrogen and lithium ions capture
• ISSN: 0304-3843; 1572-9540
• DOI: 10.1007/s10751-019-1561-3

In this work we propose a new method to form both protonium exotic p p ¯ and lithium antiproton p ¯ Li + atoms by capturing the hydrogen H − and lithium Li + ions of the LiH crystal lattice at planar or axial channeling of low-energy antiproton beams. Within sudden-perturbation approximation the probability for protons as well as for ions to be bound into different quantum levels defined by the antiproton Coulomb potential are calculated. It is shown that the probability strongly depends on the parameters of channeled antiprotons revealing various extremes (resonances): the functions of capture probabilities for all excited quantum states of antiproton are characterized by three most intense peaks. Higher probability to form heavier particles, namely antiproton lithium p ¯ Li + , have been demonstrated.