Three-Body Coulomb Problem Probed by Mapping the Bethe Surface in Ionizing Ion-Atom Collisions

R. MOSHAMMER; A. PERUMAL; M. SCHULZ; V. D. RODRÍGUEZ; H. KOLLMUS; R. MANN; S. HAGMANN; J. ULLRICH

PHYSICAL REVIEW LETTERS

AMER PHYSICAL SOC

Lugar: New York; Año: 2001 vol. 87 p. 23201 - 23204

0031-9007

The three-body Coulomb problem has been explored in kinematically complete experiments on single ionization of helium by 100MeV/uC6+ and 3.6MeV/uAu53+ impact. Low-energy electron emission ( Ee<150eV) as a function of the projectile deflection ϑp (momentum transfer), i.e., the Bethe surface [[15]], has been mapped with Δϑp±25 nanoradian resolution at extremely large perturbations ( 3.6MeV/uAu53+) 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