Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 12: Posters Thursday (Ion/Atom/Molecule/Surface Scattering)
A 12.1: Poster
Donnerstag, 5. April 2001, 12:30–15:00, AT3
Strong Correlations in the He ground state momentum wave function — •Horst Schmidt-Böcking1, Volker Mergel1, Reinhard Dörner1,2, Khaldoun Khayyat1, Matthias Achler1, Thorsten Weber1, Ottmar Jagutzki1, Hans Jürgen Lüdde3, and Lew Cocke4 — 1Institut für Kernphysik der Universität Frankfurt — 2Fakultät für Physik, Universität Freiburg — 3Institut für Theoretische Physik der Universität Frankfurt — 4Department of Physics, Kansas State University, Manhattan KS 66506
The four-particle process of proton-helium transfer ionization (TI) has been studied using Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) to measure the momenta of all three particles in the final state. Most of the electrons are emitted in the H0 scattering plane and in the backward direction. The final state momentum distributions show discrete structures very different from those expected for uncorrelated capture and ionization. The measured momentum pattern is interpreted to be due to a new TI reaction channel which results from strong correlations in the initial He ground state momentum wave function.