Tracing multiple scattering patterns in absolute (e,2e) cross sections for H{sub 2} and He over a 4{pi} solid angle

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.032712· OSTI ID:21450564

Ren, X; Senftleben, A; Pflueger, T; Dorn, A; Ullrich, J ^[1]; Colgan, J ^[2]; Pindzola, M S ^[3]; Al-Hagan, O; Madison, D H ^[4]; Bray, I; Fursa, D V ^[5]

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1. Max-Planck-Institute for Nuclear Physics, 69117 Heidelberg (Germany)
2. Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
3. Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)
4. Physics Department, Missouri University of Science and Technology, Rolla, Missouri 65409 (United States)
5. ARC Centre for Antimatter-Matter Studies, Curtin University, G.P.O. Box U1987 Perth, Western Australia (Australia)

Absolutely normalized (e,2e) measurements for H{sub 2} and He covering the full solid angle of one ejected electron are presented for 16 eV sum energy of both final state continuum electrons. For both targets rich cross-section structures in addition to the binary and recoil lobes are identified and studied as a function of the fixed electron's emission angle and the energy sharing among both electrons. For H{sub 2} their behavior is consistent with multiple scattering of the projectile as discussed before [Al-Hagan et al., Nature Phys. 5, 59 (2009)]. For He the binary and recoil lobes are significantly larger than for H{sub 2} and partly cover the multiple scattering structures. To highlight these patterns we propose a alternative representation of the triply differential cross section. Nonperturbative calculations are in good agreement with the He results and show discrepancies for H{sub 2} in the recoil peak region. For H{sub 2} a perturbative approach reasonably reproduces the cross-section shape but deviates in absolute magnitude.

• OSTI ID: 21450564
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON EMISSION
ELECTRON-ATOM COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
EV RANGE
FERMIONS
FLUIDS
GASES
HELIUM
HYDROGEN
LEPTONS
MOLECULE COLLISIONS
MULTIPLE SCATTERING
NONMETALS
RARE GASES
RECOILS
SCATTERING
TOTAL CROSS SECTIONS