Fully differential cross-section measurements for electron-impact ionization of argon over the complete in-plane angular range
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2008
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Stevenson, M.
Lohmann, B.
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Physical Review A: Atomic, Molecular and Optical Physics, 2008; 77(3):032708-01-032708-06
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M. A. Stevenson and B. Lohmann
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Abstract
The triple differential cross section for electron-impact ionization of the 3p orbital of argon by 113.5 eV incident electrons has been measured using a magnetic angle changer in a conventional (e,2e) spectrometer. Results are presented for 2 eV ejected electrons over an extended angular range, and over the complete coplanar scattering plane for 5 eV ejected electrons. The data reveal previously unobserved structures, and are compared with recent distorted-wave Born approximation (DWBA) and hybrid DWBA R-matrix calculations. Large discrepancies exist between experiment and both calculations in the accessed regions.
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© 2008 The American Physical Society