Electron capture to the continuum manifestation in fully differential cross sections for ion impact single ionization

M. F. CIAPPINA; FOJÓN, O.A.; R. D. RIVAROLA

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2018 vol. 51 p. 85204 - 85210

0953-4075

We present theoretical calculations of single ionization of He atoms by protons and multiplycharged ions. The kinematical conditions are deliberately chosen in such a way that the ejectedelectron velocity matches the projectile impact velocity. The computed fully differential crosssections (FDCS) in the scattering plane using the continuum-distorted wave-eikonal initial state show a distinct peaked structure for a polar electron emission angle 0°. This element is absent when a first order theory is employed. Consequently, we can argue that this peak is a clear manifestation of a three-body effect, not observed before in FDCS. We discuss a possible interpretation of this new feature.