Simultaneous target and projectile ionization in C2+ + He

R. E. Olson, J Fiol, M Schulz
(Physics Department, University of Missouri, Rolla, MO 65401)

H Kollmus, R Moshammer, J Ullrich
(Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany)

S Hagmann
(Physics Department, Kansas State University, Manhattan, Kansas 66506-2601)

The simultaneous single ionization of the target and the projectile in the C2+ + He collision is investigated within the Classical Trajectory Monte Carlo (CTMC) theory. The 6-body calculations include the two helium K-shell electrons and the two L-shell electrons of the C2+ ion. In this model, each electron interacts with the two nuclei and with each of the two electrons initially bound to the other center. These results are compared with similar calculations where each electron only interacts with either the nuclei or the electrons of the other center. For low values of the total momentum transfer, the correlation between the two emitted electrons is reflected in a maximum at 180 ° in the relative azimuthal angle φeP,eT between the electrons. For higher values of the momentum transfer simultaneous ionization is mainly produced by the interaction of each emitted electron with the other screened nucleus, producing a isotropic distribution of azimuthal angles φeP,eT. The present calculations show excellent agreement with recently available kinematically-complete experimental data.

This work was supported by the Chemical Sciences, Geosciences and Biosciences Division,
Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.

Submitted to DAMOP 2002, May 2002 in Williamsburg, VA.

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