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Fully differential cross sections for photo-double-ionization of D2
Th Weber1, A Czasch, O Jagutzki
1Institut für Kernphysik, Universität Frankfurt, D 60486 Frankfurt, Germany.
Physical Review Letters
|June 1, 2004
Abstract:
We report the first kinematically complete study of the four-body fragmentation of the D2 molecule following absorption of a single photon. For equal energy sharing of the two electrons and a photon energy of 75.5 eV, we observed the relaxation of one of the selection rules valid for He photo-double-ionization and a strong dependence of the electron angular distribution on the orientation of the molecular axis. This effect is reproduced by a model in which a pair of photoionization amplitudes is introduced for the light polarization parallel and perpendicular to the molecular axis.