Mechanisms of photo double ionization of helium by 530 eV photons
Date
2002-06-27
Authors
Knapp, A
Kheifets, Anatoli
Bray, Igor
Weber, Thorsten
Landers, A L
Schossler, S
Jahnke, T
Nickles, J
Kammer, S
Jagutzki, Ottmar
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American Physical Society
Abstract
We have measured fully differential cross sections for photo double ionization of helium 450eV above the threshold. We have found an extremely asymmetric energy sharing between the photoelectrons and an angular asymmetry parameter β≃2 and β≃0 for the fast and slow electrons, respectively. The electron angular distributions show a dominance of the shakeoff for 2eV electrons and clear evidence of an inelastic electron-electron scattering at an electron energy of 30eV. The data are in excellent agreement with convergent close-coupling calculations.
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Keywords
Keywords: Eigenvalues and eigenfunctions; Electric field effects; Electric potential; Electron scattering; Ground state; Kinematics; Light polarization; Magnetic field effects; Photoionization; Photons; Wave equations; Photo double ionization (PDI); Helium
Citation
Physical Review Letters 89.3 (2002): 033004/1-4
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Physical Review Letters
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Journal article
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