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  Low-energy electron-impact ionization of argon: Three-dimensional cross section

Ren, X., Pflüger, T., Ullrich, J., Zatsarinny, O., Bartschat, K., Madison, D. H., et al. (2012). Low-energy electron-impact ionization of argon: Three-dimensional cross section. Physical Review. A, 85(3): 032702, pp. 1-8. doi:10.1103/PhysRevA.85.032702.

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Ren, X.1, Author           
Pflüger, T.1, Author           
Ullrich, J.1, Author           
Zatsarinny, O., Author
Bartschat, K., Author
Madison, D. H., Author
Dorn, A.1, Author           
Affiliations:
1Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society, ou_904547              

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 Abstract: Low-energy (E0 = 70.8 eV) electron-impact single ionization of a 3p electron in argon has been studied experimentally and theoretically. Our measurements are performed using the so-called reaction microscope technique, which can cover nearly a full 4π solid angle for the emission of a secondary electron with energy below 15 eV and projectile scattering angles ranging from −8° to −30°. The measured cross sections are internormalized across all scattering angles and ejected energies. Several theoretical models were employed to predict the triple-differential cross sections (TDCSs). They include a standard distorted-wave Born approximation (DWBA), a modified version to account for the effects of postcollision interaction (DWBA-PCI), a hybrid second-order distorted-wave plus R-matrix (DWB2-RM) method, and the recently developed B-spline R-matrix with pseudostates (BSR) approach. The relative angular dependence of the BSR cross sections is generally found to be in reasonable agreement with experiment, and the importance of the PCI effect is clearly visible in this low-energy electron-impact ionization process. However, there remain significant differences in the magnitude of the calculated and the measured TDCSs.

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Language(s): eng - English
 Dates: 2012-03-02
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevA.85.032702
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Title: Physical Review. A
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : Published by the American Physical Society through the American Institute of Physics
Pages: - Volume / Issue: 85 (3) Sequence Number: 032702 Start / End Page: 1 - 8 Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2