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Revealing the two-electron cusp in the ground states of He and H2 via quasifree double photoionization

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Trinter,  Florian
Photon Science, Deutsches Elektronen-Synchrotron (DESY);
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Fulltext (public)

PhysRevResearch.2.033080.pdf
(Publisher version), 657KB

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Citation

Grundmann, S., Serov, V. V., Trinter, F., Fehre, K., Strenger, N., Pier, A., et al. (2020). Revealing the two-electron cusp in the ground states of He and H2 via quasifree double photoionization. Physical Review Research, 2(3): 033080. doi:10.1103/PhysRevResearch.2.033080.


Cite as: http://hdl.handle.net/21.11116/0000-0006-BC2F-3
Abstract
We report on kinematically complete measurements and ab initio nonperturbative calculations of double ionization of He and H2 by a single 800 eV circularly polarized photon. We confirm the quasifree mechanism of photoionization for H2 and show how it originates from the two-electron cusp in the ground state of a two-electron target. Our approach establishes a method for mapping electrons relative to each other and provides valuable insight into photoionization beyond the electric-dipole approximation.