Benchmark experiment for electron-impact ionization of argon: Absolute triple-differential cross sections via three-dimensional electron emission images

Journal Article · Sun May 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.052714· OSTI ID:21546782

Xueguang, Ren; Senftleben, Arne; Pflueger, Thomas; Dorn, Alexander; Ullrich, Joachim ^[1]; Bartschat, Klaus ^[2]

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1. Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany)
2. Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311 (United States)

Single ionization of argon by 195-eV electron impact is studied in an experiment, where the absolute triple-differential cross sections are presented as three-dimensional electron emission images for a series of kinematic conditions. Thereby a comprehensive set of experimental data for electron-impact ionization of a many-electron system is produced to provide a benchmark for comparison with theoretical predictions. Theoretical models using a hybrid first-order and second-order distorted-wave Born plus R-matrix approach are employed to compare their predictions with the experimental data. While the relative shape of the calculated cross section is generally in reasonable agreement with experiment, the magnitude appears to be the most significant problem with the theoretical treatment for the conditions studied in the present work. This suggests that the most significant challenge in the further development of theory for this process may lie in the reproduction of the absolute scale rather than the angular dependence of the cross section.

• OSTI ID: 21546782
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.052714; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON
BENCHMARKS
BORN APPROXIMATION
COMPARATIVE EVALUATIONS
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
ELECTRON EMISSION
ELECTRONS
EV RANGE
EXPERIMENTAL DATA
IMAGES
IONIZATION
R MATRIX
THREE-DIMENSIONAL CALCULATIONS
APPROXIMATIONS
CALCULATION METHODS
CROSS SECTIONS
DATA
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
EVALUATION
FERMIONS
FLUIDS
GASES
INFORMATION
LEPTONS
MATRICES
NONMETALS
NUMERICAL DATA
RARE GASES