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Capture of slow antiprotons by helium atoms

J. Révai, N. V. Shevchenko

arXiv:physics/0412145The European Physical Journal DOct 3, 20059 citations

The capture of slow antiprotons by noble gas atoms

J S Briggs

AIP conference proceedingsJan 1, 20050 citations

Exotic molecules consisting of an antiproton and a hydrogen atom

一博崎本, Kazuhiro Sakimoto

Oct 8, 20180 citations

First capture of antiprotons in an ion trap and the possibility of antihydrogen

G. Gabrielse

Dec 1, 19870 citations

Trapping of antiprotons in metastable antiprotonic helium atoms: Progress and prospects

H. Daniel, J. A. Eades, Till von Egidy

Physics of Atomic NucleiOct 1, 19940 citations

The capture of slow antiprotons in noble gases

J S Briggs, P. Thornton Greenland, Е. А. Соловьев

The capture of slow antiprotons (energies less than 1.0 au, i.e. roughly 27 eV) by the rare gas atoms helium, neon and argon is considered. Appropriate to this low velocity, the capture cross sections are calculated using the adiabatic `hidden-crossing' theory in which the collision complex is viewed as a transient diatomic molecule with the positively-charged atomic ion and antiproton as nuclei. In addition to the total capture cross section, estimates of the percentage population of long-lived `circular' states is given. Our calculations suggest that a few per cent of captured antiprotons occupy these states in helium but in the case of argon or neon the probability of primary capture into such long-lived states is negligible. These results are at variance with previous calculations of antiproton capture cross sections.The capture of slow antiprotons (energies less than 1.0 au, i.e. roughly 27 eV) by the rare gas atoms helium, neon and argon is considered. Appropriate to this low velocity, the capture cross sections are calculated using the adiabatic `hidden-crossing' theory in which the collision complex is viewed as a transient diatomic molecule with the positively-charged atomic ion and antiproton as nuclei. In addition to the total capture cross section, estimates of the percentage population of long-lived `circular' states is given. Our calculations suggest that a few per cent of captured antiprotons occupy these states in helium but in the case of argon or neon the probability of primary capture into such long-lived states is negligible. These results are at variance with previous calculations of antiproton capture cross sections.

Journal of Physics B Atomic Molecular and Optical PhysicsJan 1, 199929 citations

Theory of the capture of antiprotons by atoms and molecules

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