Electron-impact ionization of helium: A comprehensive experiment benchmarks theory

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

DOI:https://doi.org/10.1103/PHYSREVA.83.052711· OSTI ID:21546779

Ren, X; Pflueger, T; Senftleben, A; Xu, S; Dorn, A; Ullrich, J ^[1]; Bray, I; Fursa, D V ^[2]; Colgan, J ^[3]; Pindzola, M S ^[4]

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1. Max-Planck-Institute for Nuclear Physics, DE-69117 Heidelberg (Germany)
2. ARC Centre for Antimatter-Matter Studies, Curtin University, GPO Box U1987 Perth, Western Australia (Australia)
3. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
4. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)

Single ionization of helium by 70.6-eV electron impact is studied in a comprehensive experiment covering a major part of the entire collision kinematics and the full 4{pi} solid angle for the emitted electron. The absolutely normalized triple-differential experimental cross sections are compared with results from the convergent close-coupling (CCC) and the time-dependent close-coupling (TDCC) theories. Whereas excellent agreement with the TDCC prediction is only found for equal energy sharing, the CCC calculations are in excellent agreement with essentially all experimentally observed dynamical features, including the absolute magnitude of the cross sections.

• OSTI ID: 21546779
• Journal Information: Physical Review. A, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.052711; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BENCHMARKS
COLLISIONS
COUPLING
CROSS SECTIONS
ELECTRONS
EV RANGE
HELIUM
IONIZATION
TIME DEPENDENCE
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FLUIDS
GASES
LEPTONS
NONMETALS
RARE GASES