https://doi.org/10.1140/epjst/e2009-00979-6
Single photon double ionization of H2 by circularly polarized photons at a photon energy of 160 eV
Interference, decoherence and its dependence on the internuclear distance
1
Institut für Kernphysik, University Frankfurt Max von Laue Str. 1, 60438 Frankfurt, Germany
2
DESY, Notkestrasse 85, 22607 Hamburg, Germany
3
Lawrence Berkeley National Lab., Berkeley, CA, 94720, USA
4
Centro de Física de Materiales and Donostia International Physics Center, 20018 San Sebastián, Spain
5
State University of Aerospace Instrumentation, 190000 St. Petersburg, Russia
6
Dept. of Physics, Kansas State Univ, Cardwell Hall Manhattan, KS, 66506, USA
7
Department of Physics, Auburn University, Auburn, AL, 36849, USA
Corresponding author: doerner@atom.uni-frankfurt.de
We report on fully differential cross sections for double ionization of H2 by a single circularly polarized photon of 160 eV energy. For an unequal sharing of the energy between the two electrons and a particular geometry where the influence of electron/electron interaction is constant, we find a four-lobe structure in the molecular frame angular distribution of the faster electron. This structure is interpreted to be due to a coherent emission of the electron from the two atomic centers of the molecule. This Young-type interference pattern is lost for other geometries, where electron-electron interaction plays a major role. Furthermore, we show that the interference structure depends strongly on the internuclear distance.
© EDP Sciences, Springer-Verlag, 2009
