Low Energy Inner-Valence Electron Impact Ionization of Argon

  • Matthew A. Haynes
  • Birgit Lohmann


We present here experimental results for the triple differential cross section (TDCS) for low energy electron impact ionization of a heavy target in the coplanar asymmetric geometry. We have investigated ionization of the 3s inner-valence orbital in argon, at an incident energy of 113. 5 eV (< 5 times the binding energy of 29. 3 eV), scattering angle of 15° and ejected electron energies of 2, 5, 7. 5 and 10 eV. The choice of target orbital and kinematics was prompted by the existence of published results of distorted-wave Born approximation calculations which predicted interesting structure in both the binary and recoil regions of the TDCS. The experimental measurements have been performed in a new low energy coincidence spectrometer. We compare our experimental results with two distorted wave Born approximation calculations. There are very large deviations between theory and experiment at all ejected electron energies investigated.

Key words

Electron impact ionization electron coincidence triple differential cross section (e,2e) rare gases 


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  1. Bray I 2000 (private communication)Google Scholar
  2. Bray I and Fursa D V 1996Phys. Rev. A 542991ADSCrossRefGoogle Scholar
  3. Ehrhardt H, Hesselbacher K H, Jung K and Willman K 1972J. Phys. B 51559ADSCrossRefGoogle Scholar
  4. Furness J B and McCarthy IE 1973J. Phys. B 62280ADSCrossRefGoogle Scholar
  5. Haynes M A and Lohmann B 2000J. Phys. B(submitted)Google Scholar
  6. Madison D H and Lang R 1981J. Phys. B 144137ADSCrossRefGoogle Scholar
  7. McCarthy IE 1995Aust. J. Phys. 481ADSGoogle Scholar
  8. Schlemmer P, Srivastava M K, Rösel T and Ehrhardt H 1991J. Phys. B 242719ADSCrossRefGoogle Scholar
  9. Whelan C T, Allan R J, Walters H R J, Zhang X, Röder J, Jung K and Ehrhardt H 1994Phys. Rev. A 504394ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Matthew A. Haynes
    • 1
  • Birgit Lohmann
    • 1
  1. 1.School of ScienceGriffith UniversityNathanAustralia

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