title: Ionization of helium and argon by very slow antiproton impact.
abstract: 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 keV using 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 the many recent theories.
authors.affiliation: Department of Physics and Astronomy, University of Aarhus, Denmark.
authors.forename: H
authors.initials: H
authors.lastname: Knudsen
authors.forename: H-P E
authors.initials: HP
authors.lastname: Kristiansen
authors.forename: H D
authors.initials: HD
authors.lastname: Thomsen
authors.forename: U I
authors.initials: UI
authors.lastname: Uggerhøj
authors.forename: T
authors.initials: T
authors.lastname: Ichioka
authors.forename: S P
authors.initials: SP
authors.lastname: Møller
authors.forename: C A
authors.initials: CA
authors.lastname: Hunniford
authors.forename: R W
authors.initials: RW
authors.lastname: McCullough
authors.forename: M
authors.initials: M
authors.lastname: Charlton
authors.forename: N
authors.initials: N
authors.lastname: Kuroda
authors.forename: Y
authors.initials: Y
authors.lastname: Nagata
authors.forename: H A
authors.initials: HA
authors.lastname: Torii
authors.forename: Y
authors.initials: Y
authors.lastname: Yamazaki
authors.forename: H
authors.initials: H
authors.lastname: Imao
authors.forename: H H
authors.initials: HH
authors.lastname: Andersen
authors.forename: K
authors.initials: K
authors.lastname: Tökesi