Comparative study of argon 3p electron-impact ionization at low energies
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(Published version)
Date
2001
Authors
Haynes, Matthew A.
Lohmann, Birgit
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Journal article
Citation
Physical Review A, 2001; 64(4):004701
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Haynes, Matthew A. and Lohmann, Birgit
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Abstract
An experimental and theoretical study of electron-impact ionization of the 3p orbital in argon is presented. The (e,2e) technique was used to measure the relative triple-differential cross section for this process in the coplanar asymmetric geometry. The experimental results were obtained at an incident electron energy of 113.5 eV, a scattering angle of 15°, and ejected electron energies of 10, 7.5, 5, and 2 eV. The experimental data are compared with a distorted-wave Born approximation (DWBA) calculation, and also with previous results for argon 3s ionization obtained under identical kinematic conditions. Discrepancies between the experimental and theoretical data are attributed to the effects of charge-cloud polarization and higher-order scattering processes, which are not incorporated in the DWBA calculation.
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Office of the Deputy Vice-Chancellor and Vice-President (Academic)
School of Chemistry and Physics
School of Chemistry and Physics
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(c) 2001 The American Physical Society