Three-body Coulomb problem probed by mapping the Bethe surface in ionizing ion-atom collisions.
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.
Moshammer
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R
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. R.Moshammer@mpi-hd.mpg.de
Perumal
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A
Schulz
M
M
Rodríguez
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Kollmus
H
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Mann
R
R
Hagmann
S
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Ullrich
J
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