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Triple-differential cross-section measurements of electron-impact ionization of argon 3s in the backward scattering direction
Journal article   Peer reviewed

Triple-differential cross-section measurements of electron-impact ionization of argon 3s in the backward scattering direction

M A Stevenson and Birgit Lohmann
Physical Review A (Atomic, Molecular and Optical Physics), Vol.73(2), pp.1-4
2006
url
https://doi.org/10.1103/PhysRevA.73.020701View
Published Version

Abstract

Atomic, Molecular, Nuclear, Particle and Plasma Physics Physical Chemistry (incl. Structural) triple-differential cross section electron-impact ionization argon
The triple-differential cross section for the electron-impact ionization of the 3s orbital of argon has been measured over the complete backward scattering direction of the ejected electron, using a magnetic angle changer in a conventional (e,2e) spectrometer. The results reveal the position and relative magnitude of the recoil scattering peak in the cross section for this target, and enable a detailed comparison with recently published calculations of argon 3s ionization which have been performed using a hybrid distorted-wave Born approximation-R-matrix approach. These theoretical calculations show dramatically improved agreement with the experimental results, in comparison with earlier approaches, but puzzling discrepancies still remain.

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