title: Three-body Coulomb problem probed by mapping the Bethe surface in ionizing ion-atom collisions.
abstract: The three-body Coulomb problem has been explored in kinematically complete experiments on single ionization of helium by 100 MeV/u C(6+) and 3.6 MeV/u Au(53+) impact. Low-energy electron emission ( E(e)<150 eV) as a function of the projectile deflection theta(p) (momentum transfer), i.e., the Bethe surface [15], has been mapped with Delta theta(p)+/-25 nanoradian resolution at extremely large perturbations ( 3.6 MeV/u Au(53+)) where single ionization occurs at impact parameters of typically 10 times the He K-shell radius. The experimental data are not in agreement with state-of-the-art continuum distorted wave-eikonal initial state theory.
authors.affiliation: Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. R.Moshammer@mpi-hd.mpg.de
authors.forename: R
authors.initials: R
authors.lastname: Moshammer
authors.forename: A
authors.initials: A
authors.lastname: Perumal
authors.forename: M
authors.initials: M
authors.lastname: Schulz
authors.forename: V D
authors.initials: VD
authors.lastname: Rodríguez
authors.forename: H
authors.initials: H
authors.lastname: Kollmus
authors.forename: R
authors.initials: R
authors.lastname: Mann
authors.forename: S
authors.initials: S
authors.lastname: Hagmann
authors.forename: J
authors.initials: J
authors.lastname: Ullrich