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Electron-impact ionization of helium: A comprehensive experiment benchmarks theory

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

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

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

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

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

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

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Citation

Ren, X. G., Bray, I., Fursa, D. V., Colgan, J., Pindzola, M. S., Pflüger, T., et al. (2011). Electron-impact ionization of helium: A comprehensive experiment benchmarks theory. Physical Review. A, 83(5): 052711, pp. 1-6. doi:10.1103/PhysRevA.83.052711.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-F235-F
Abstract
Single ionization of helium by 70.6-eV electron impact is studied in a comprehensive experiment covering a major part of the entire collision kinematics and the full 4π solid angle for the emitted electron. The absolutely normalized triple-differential experimental cross sections are compared with results from the convergent close-coupling (CCC) and the time-dependent close-coupling (TDCC) theories. Whereas excellent agreement with the TDCC prediction is only found for equal energy sharing, the CCC calculations are in excellent agreement with essentially all experimentally observed dynamical features, including the absolute magnitude of the cross sections.