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Mechanisms of photo double ionization of helium by 530 eV photons

Knapp, A; Kheifets, Anatoli; Bray, Igor; Weber, Thorsten; Landers, A L; Schossler, S; Jahnke, T; Nickles, J; Kammer, S; Jagutzki, Ottmar; Schmidt, L Ph H; Osipov, T; Rosch, J; Prior, M; Schmidt-Böcking, H; Cocke, C L; Dorner, R


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...[Show more]

CollectionsANU Research Publications
Date published: 2002-06-27
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.89.033004


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