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Correlation Effects in Differential Electron-Emission Spectra obtained from Double Ionization of He by Fast Au 53+ Impact

MPS-Authors
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Kirchner,  T.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Moshammer,  R.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Schulz,  M.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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Ullrich,  J.
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society;

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kirchner1.pdf
(Preprint), 194KB

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Citation

Kirchner, T., Gulyás, L., Moshammer, R., Schulz, M., & Ullrich, J. (2003). Correlation Effects in Differential Electron-Emission Spectra obtained from Double Ionization of He by Fast Au 53+ Impact. 11th International Conference on the Physics of Highly Charged Ions: Caen, France, 1 - 6 September 2002, 479-483.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-8108-6
Abstract
We have measured and calculated doubly differential electron-emission cross sections (DDCS s) for well-defined degrees of target ionisation in 3.6 MeV/amu Au53þ þHe collisions. The calculations are based on the continuum distortedmwave with eikonal initial state approximation. We focus on DDCS s obtained in coincidence with double ionisation of the target, and investigate different models for the final two-electron continuum state. Whereas the results of an analysis within the independent particle model overestimate the experimental data badly, we find reduced DDCS s when electron correlation effects are included in a relatively simple fashion. The comparison between theoretical and experimental results indicates that the effective strength of the electron repulsion differs in close and distant collisions.