Ionization of Helium and Argon by Very Slow Antiproton Impact

H. Knudsen, H.P.E. Kristiansen, H.D. Thomsen, U.I. Uggerhoj, T. Ichioka, S.P. Moller, Christopher Hunniford, Robert McCullough, M. Charlton, N. Kuroda, Y. Nagata, H.A. Torii, Y. Yamazaki, H. Imao, H.H. Andersen, K. Tokesi

Research output: Contribution to journalArticle

56 Citations (Scopus)


The total cross sections for single ionization of helium and single and double ionization of argon by antiproton impact have been measured in the kinetic energy range from 3 to 25 jeVusing a new technique for the creation of intense slow antiproton beams. The new data provide benchmark results for the development of advanced descriptions of atomic collisions and we show that they can be used to judge, for the first time, the validity of many recent theories.
Original languageEnglish
Article number043201
Pages (from-to)043201-1-043201-4
Number of pages4
JournalPhysical Review Letters
Issue number4
Publication statusPublished - 25 Jul 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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