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

Ren, X.; Bray, Igor; Fursa, Dmitry; Colgan, J.; Pindzola, M.; Pflüger, T.; Senftleben, A.; Xu, S.; Dorn, A.; Ullrich, J.

doi:10.1103/PhysRevA.83.052711

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Authors

Ren, X.

Bray, Igor

Fursa, Dmitry

Colgan, J.

Pindzola, M.

Pflüger, T.

Senftleben, A.

Xu, S.

Dorn, A.

Ullrich, J.

Date

2011

Type

Journal Article

Metadata

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Citation

Ren, X and Bray, I. and Fursa, D. V. and Colgan, J. and Pindzola, M. S. and Pflüger, T and Senftleben, A and Xu, S. and Dorn, A and Ullrich, J. 2011. Electron-impact ionization of helium: A comprehensive experiment benchmarks theory. Physical Review A. 83 (5): pp. 052711-1-052711-6.

Source Title

Physical Review A

DOI

10.1103/PhysRevA.83.052711

ISSN

1050-2947

School

Department of Imaging and Applied Physics

URI

http://hdl.handle.net/20.500.11937/33507

Collection

Curtin Research Publications

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.